# Google Dataflow API . projects . jobs . workItems

## Instance Methods

Leases a dataflow WorkItem to run.

Reports the status of dataflow WorkItems leased by a worker.

### Method Details

`lease(projectId, jobId, body, x__xgafv=None)`

    Leases a dataflow WorkItem to run.

    Args:
      projectId: string, Identifies the project this worker belongs to. (required)
      jobId: string, Identifies the workflow job this worker belongs to. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request to lease WorkItems.
        "workItemTypes": [ # Filter for WorkItem type.
          "A String",
        ],
        "requestedLeaseDuration": "A String", # The initial lease period.
        "workerCapabilities": [ # Worker capabilities. WorkItems might be limited to workers with specific capabilities.
          "A String",
        ],
        "currentWorkerTime": "A String", # The current timestamp at the worker.
        "workerId": "A String", # Identifies the worker leasing work -- typically the ID of the virtual machine running the worker.
      }

      x__xgafv: string, V1 error format.

    Returns:
      An object of the form:

        { # Response to a request to lease WorkItems.
        "workItems": [ # A list of the leased WorkItems.
          { # WorkItem represents basic information about a WorkItem to be executed in the cloud.
            "reportStatusInterval": "A String", # Recommended reporting interval.
            "leaseExpireTime": "A String", # Time when the lease on this [Work][] will expire.
            "seqMapTask": { # Describes a particular function to invoke. # Additional information for SeqMapTask WorkItems.
              "inputs": [ # Information about each of the inputs.
                { # Information about a side input of a DoFn or an input of a SeqDoFn.
                  "sources": [ # The source(s) to read element(s) from to get the value of this side input. If more than one source, then the elements are taken from the sources, in the specified order if order matters. At least one source is required.
                    { # A source that records can be read and decoded from.
                      "codec": { # The codec to use to decode data read from the source.
                        "a_key": "", # Properties of the object.
                      },
                      "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                        {
                          "a_key": "", # Properties of the object.
                        },
                      ],
                      "spec": { # The source to read from, plus its parameters.
                        "a_key": "", # Properties of the object.
                      },
                      "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                      "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                        "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                        "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                        "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                      },
                    },
                  ],
                  "kind": { # How to interpret the source element(s) as a side input value.
                    "a_key": "", # Properties of the object.
                  },
                  "tag": "A String", # The id of the tag the user code will access this side input by; this should correspond to the tag of some MultiOutputInfo.
                },
              ],
              "outputInfos": [ # Information about each of the outputs.
                { # Information about an output of a SeqMapTask.
                  "tag": "A String", # The id of the TupleTag the user code will tag the output value by.
                  "sink": { # A sink that records can be encoded and written to. # The sink to write the output value to.
                    "codec": { # The codec to use to encode data written to the sink.
                      "a_key": "", # Properties of the object.
                    },
                    "spec": { # The sink to write to, plus its parameters.
                      "a_key": "", # Properties of the object.
                    },
                  },
                },
              ],
              "stageName": "A String", # System-defined name of the stage containing the SeqDo operation. Unique across the workflow.
              "systemName": "A String", # System-defined name of the SeqDo operation. Unique across the workflow.
              "userFn": { # The user function to invoke.
                "a_key": "", # Properties of the object.
              },
              "name": "A String", # The user-provided name of the SeqDo operation.
            },
            "projectId": "A String", # Identifies the cloud project this WorkItem belongs to.
            "sourceOperationTask": { # A work item that represents the different operations that can be performed on a user-defined Source specification. # Additional information for source operation WorkItems.
              "getMetadata": { # A request to compute the SourceMetadata of a Source. # Information about a request to get metadata about a source.
                "source": { # A source that records can be read and decoded from. # Specification of the source whose metadata should be computed.
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
              "split": { # Represents the operation to split a high-level Source specification into bundles (parts for parallel processing). At a high level, splitting of a source into bundles happens as follows: SourceSplitRequest is applied to the source. If it returns SOURCE_SPLIT_OUTCOME_USE_CURRENT, no further splitting happens and the source is used "as is". Otherwise, splitting is applied recursively to each produced DerivedSource. As an optimization, for any Source, if its does_not_need_splitting is true, the framework assumes that splitting this source would return SOURCE_SPLIT_OUTCOME_USE_CURRENT, and doesn't initiate a SourceSplitRequest. This applies both to the initial source being split and to bundles produced from it. # Information about a request to split a source.
                "source": { # A source that records can be read and decoded from. # Specification of the source to be split.
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
                "options": { # Hints for splitting a Source into bundles (parts for parallel processing) using SourceSplitRequest. # Hints for tuning the splitting process.
                  "desiredShardSizeBytes": "A String", # DEPRECATED in favor of desired_bundle_size_bytes.
                  "desiredBundleSizeBytes": "A String", # The source should be split into a set of bundles where the estimated size of each is approximately this many bytes.
                },
              },
            },
            "initialReportIndex": "A String", # The initial index to use when reporting the status of the WorkItem.
            "mapTask": { # MapTask consists of an ordered set of instructions, each of which describes one particular low-level operation for the worker to perform in order to accomplish the MapTask's WorkItem. Each instruction must appear in the list before any instructions which depends on its output. # Additional information for MapTask WorkItems.
              "systemName": "A String", # System-defined name of this MapTask. Unique across the workflow.
              "stageName": "A String", # System-defined name of the stage containing this MapTask. Unique across the workflow.
              "instructions": [ # The instructions in the MapTask.
                { # Describes a particular operation comprising a MapTask.
                  "name": "A String", # User-provided name of this operation.
                  "read": { # An instruction that reads records. Takes no inputs, produces one output. # Additional information for Read instructions.
                    "source": { # A source that records can be read and decoded from. # The source to read from.
                      "codec": { # The codec to use to decode data read from the source.
                        "a_key": "", # Properties of the object.
                      },
                      "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                        {
                          "a_key": "", # Properties of the object.
                        },
                      ],
                      "spec": { # The source to read from, plus its parameters.
                        "a_key": "", # Properties of the object.
                      },
                      "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                      "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                        "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                        "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                        "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                      },
                    },
                  },
                  "outputs": [ # Describes the outputs of the instruction.
                    { # An output of an instruction.
                      "codec": { # The codec to use to encode data being written via this output.
                        "a_key": "", # Properties of the object.
                      },
                      "systemName": "A String", # System-defined name of this output. Unique across the workflow.
                      "name": "A String", # The user-provided name of this output.
                    },
                  ],
                  "partialGroupByKey": { # An instruction that does a partial group-by-key. One input and one output. # Additional information for PartialGroupByKey instructions.
                    "input": { # An input of an instruction, as a reference to an output of a producer instruction. # Describes the input to the partial group-by-key instruction.
                      "outputNum": 42, # The output index (origin zero) within the producer.
                      "producerInstructionIndex": 42, # The index (origin zero) of the parallel instruction that produces the output to be consumed by this input. This index is relative to the list of instructions in this input's instruction's containing MapTask.
                    },
                    "valueCombiningFn": { # The value combining function to invoke.
                      "a_key": "", # Properties of the object.
                    },
                    "inputElementCodec": { # The codec to use for interpreting an element in the input PTable.
                      "a_key": "", # Properties of the object.
                    },
                  },
                  "write": { # An instruction that writes records. Takes one input, produces no outputs. # Additional information for Write instructions.
                    "input": { # An input of an instruction, as a reference to an output of a producer instruction. # The input.
                      "outputNum": 42, # The output index (origin zero) within the producer.
                      "producerInstructionIndex": 42, # The index (origin zero) of the parallel instruction that produces the output to be consumed by this input. This index is relative to the list of instructions in this input's instruction's containing MapTask.
                    },
                    "sink": { # A sink that records can be encoded and written to. # The sink to write to.
                      "codec": { # The codec to use to encode data written to the sink.
                        "a_key": "", # Properties of the object.
                      },
                      "spec": { # The sink to write to, plus its parameters.
                        "a_key": "", # Properties of the object.
                      },
                    },
                  },
                  "systemName": "A String", # System-defined name of this operation. Unique across the workflow.
                  "flatten": { # An instruction that copies its inputs (zero or more) to its (single) output. # Additional information for Flatten instructions.
                    "inputs": [ # Describes the inputs to the flatten instruction.
                      { # An input of an instruction, as a reference to an output of a producer instruction.
                        "outputNum": 42, # The output index (origin zero) within the producer.
                        "producerInstructionIndex": 42, # The index (origin zero) of the parallel instruction that produces the output to be consumed by this input. This index is relative to the list of instructions in this input's instruction's containing MapTask.
                      },
                    ],
                  },
                  "parDo": { # An instruction that does a ParDo operation. Takes one main input and zero or more side inputs, and produces zero or more outputs. Runs user code. # Additional information for ParDo instructions.
                    "sideInputs": [ # Zero or more side inputs.
                      { # Information about a side input of a DoFn or an input of a SeqDoFn.
                        "sources": [ # The source(s) to read element(s) from to get the value of this side input. If more than one source, then the elements are taken from the sources, in the specified order if order matters. At least one source is required.
                          { # A source that records can be read and decoded from.
                            "codec": { # The codec to use to decode data read from the source.
                              "a_key": "", # Properties of the object.
                            },
                            "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                              {
                                "a_key": "", # Properties of the object.
                              },
                            ],
                            "spec": { # The source to read from, plus its parameters.
                              "a_key": "", # Properties of the object.
                            },
                            "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                            "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                              "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                              "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                              "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                            },
                          },
                        ],
                        "kind": { # How to interpret the source element(s) as a side input value.
                          "a_key": "", # Properties of the object.
                        },
                        "tag": "A String", # The id of the tag the user code will access this side input by; this should correspond to the tag of some MultiOutputInfo.
                      },
                    ],
                    "input": { # An input of an instruction, as a reference to an output of a producer instruction. # The input.
                      "outputNum": 42, # The output index (origin zero) within the producer.
                      "producerInstructionIndex": 42, # The index (origin zero) of the parallel instruction that produces the output to be consumed by this input. This index is relative to the list of instructions in this input's instruction's containing MapTask.
                    },
                    "multiOutputInfos": [ # Information about each of the outputs, if user_fn is a MultiDoFn.
                      { # Information about an output of a multi-output DoFn.
                        "tag": "A String", # The id of the tag the user code will emit to this output by; this should correspond to the tag of some SideInputInfo.
                      },
                    ],
                    "numOutputs": 42, # The number of outputs.
                    "userFn": { # The user function to invoke.
                      "a_key": "", # Properties of the object.
                    },
                  },
                },
              ],
            },
            "jobId": "A String", # Identifies the workflow job this WorkItem belongs to.
            "streamingComputationTask": { # A task which describes what action should be performed for the specified streaming computation ranges. # Additional information for StreamingComputationTask WorkItems.
              "dataDisks": [ # Describes the set of data disks this task should apply to.
                { # Describes mounted data disk.
                  "dataDisk": "A String", # The name of the data disk. This name is local to the Google Cloud Platform project and uniquely identifies the disk within that project, for example "myproject-1014-104817-4c2-harness-0-disk-1".
                },
              ],
              "computationRanges": [ # Contains ranges of a streaming computation this task should apply to.
                { # Describes full or partial data disk assignment information of the computation ranges.
                  "rangeAssignments": [ # Data disk assignments for ranges from this computation.
                    { # Data disk assignment information for a specific key-range of a sharded computation. Currently we only support UTF-8 character splits to simplify encoding into JSON.
                      "start": "A String", # The start (inclusive) of the key range.
                      "end": "A String", # The end (exclusive) of the key range.
                      "dataDisk": "A String", # The name of the data disk where data for this range is stored. This name is local to the Google Cloud Platform project and uniquely identifies the disk within that project, for example "myproject-1014-104817-4c2-harness-0-disk-1".
                    },
                  ],
                  "computationId": "A String", # The ID of the computation.
                },
              ],
              "taskType": "A String", # A type of streaming computation task.
            },
            "configuration": "A String", # Work item-specific configuration as an opaque blob.
            "streamingSetupTask": { # A task which initializes part of a streaming Dataflow job. # Additional information for StreamingSetupTask WorkItems.
              "workerHarnessPort": 42, # The TCP port used by the worker to communicate with the Dataflow worker harness.
              "streamingComputationTopology": { # Global topology of the streaming Dataflow job, including all computations and their sharded locations. # The global topology of the streaming Dataflow job.
                "computations": [ # The computations associated with a streaming Dataflow job.
                  { # All configuration data for a particular Computation.
                    "inputs": [ # The inputs to the computation.
                      { # Describes a stream of data, either as input to be processed or as output of a streaming Dataflow job.
                        "streamingStageLocation": { # Identifies the location of a streaming computation stage, for stage-to-stage communication. # The stream is part of another computation within the current streaming Dataflow job.
                          "streamId": "A String", # Identifies the particular stream within the streaming Dataflow job.
                        },
                        "pubsubLocation": { # Identifies a pubsub location to use for transferring data into or out of a streaming Dataflow job. # The stream is a pubsub stream.
                          "idLabel": "A String", # If set, contains a pubsub label from which to extract record ids. If left empty, record deduplication will be strictly best effort.
                          "timestampLabel": "A String", # If set, contains a pubsub label from which to extract record timestamps. If left empty, record timestamps will be generated upon arrival.
                          "dropLateData": True or False, # Indicates whether the pipeline allows late-arriving data.
                          "topic": "A String", # A pubsub topic, in the form of "pubsub.googleapis.com/topics/
                              # /"
                          "trackingSubscription": "A String", # If set, specifies the pubsub subscription that will be used for tracking custom time timestamps for watermark estimation.
                          "subscription": "A String", # A pubsub subscription, in the form of "pubsub.googleapis.com/subscriptions/
                              # /"
                        },
                        "customSourceLocation": { # Identifies the location of a custom souce. # The stream is a custom source.
                          "stateful": True or False, # Whether this source is stateful.
                        },
                        "sideInputLocation": { # Identifies the location of a streaming side input. # The stream is a streaming side input.
                          "stateFamily": "A String", # Identifies the state family where this side input is stored.
                          "tag": "A String", # Identifies the particular side input within the streaming Dataflow job.
                        },
                      },
                    ],
                    "systemStageName": "A String", # The system stage name.
                    "keyRanges": [ # The key ranges processed by the computation.
                      { # Location information for a specific key-range of a sharded computation. Currently we only support UTF-8 character splits to simplify encoding into JSON.
                        "start": "A String", # The start (inclusive) of the key range.
                        "deliveryEndpoint": "A String", # The physical location of this range assignment to be used for streaming computation cross-worker message delivery.
                        "end": "A String", # The end (exclusive) of the key range.
                        "persistentDirectory": "A String", # The location of the persistent state for this range, as a persistent directory in the worker local filesystem.
                        "dataDisk": "A String", # The name of the data disk where data for this range is stored. This name is local to the Google Cloud Platform project and uniquely identifies the disk within that project, for example "myproject-1014-104817-4c2-harness-0-disk-1".
                      },
                    ],
                    "computationId": "A String", # The ID of the computation.
                    "outputs": [ # The outputs from the computation.
                      { # Describes a stream of data, either as input to be processed or as output of a streaming Dataflow job.
                        "streamingStageLocation": { # Identifies the location of a streaming computation stage, for stage-to-stage communication. # The stream is part of another computation within the current streaming Dataflow job.
                          "streamId": "A String", # Identifies the particular stream within the streaming Dataflow job.
                        },
                        "pubsubLocation": { # Identifies a pubsub location to use for transferring data into or out of a streaming Dataflow job. # The stream is a pubsub stream.
                          "idLabel": "A String", # If set, contains a pubsub label from which to extract record ids. If left empty, record deduplication will be strictly best effort.
                          "timestampLabel": "A String", # If set, contains a pubsub label from which to extract record timestamps. If left empty, record timestamps will be generated upon arrival.
                          "dropLateData": True or False, # Indicates whether the pipeline allows late-arriving data.
                          "topic": "A String", # A pubsub topic, in the form of "pubsub.googleapis.com/topics/
                              # /"
                          "trackingSubscription": "A String", # If set, specifies the pubsub subscription that will be used for tracking custom time timestamps for watermark estimation.
                          "subscription": "A String", # A pubsub subscription, in the form of "pubsub.googleapis.com/subscriptions/
                              # /"
                        },
                        "customSourceLocation": { # Identifies the location of a custom souce. # The stream is a custom source.
                          "stateful": True or False, # Whether this source is stateful.
                        },
                        "sideInputLocation": { # Identifies the location of a streaming side input. # The stream is a streaming side input.
                          "stateFamily": "A String", # Identifies the state family where this side input is stored.
                          "tag": "A String", # Identifies the particular side input within the streaming Dataflow job.
                        },
                      },
                    ],
                    "userStageName": "A String", # The user stage name.
                    "stateFamilies": [ # The state family values.
                      { # State family configuration.
                        "stateFamily": "A String", # The state family value.
                        "isRead": True or False, # If true, this family corresponds to a read operation.
                      },
                    ],
                  },
                ],
                "dataDiskAssignments": [ # The disks assigned to a streaming Dataflow job.
                  { # Data disk assignment for a given VM instance.
                    "vmInstance": "A String", # VM instance name the data disks mounted to, for example "myproject-1014-104817-4c2-harness-0".
                    "dataDisks": [ # Mounted data disks. The order is important a data disk's 0-based index in this list defines which persistent directory the disk is mounted to, for example the list of { "myproject-1014-104817-4c2-harness-0-disk-0" }, { "myproject-1014-104817-4c2-harness-0-disk-1" }.
                      "A String",
                    ],
                  },
                ],
                "userStageToComputationNameMap": { # Maps user stage names to stable computation names.
                  "a_key": "A String",
                },
              },
              "receiveWorkPort": 42, # The TCP port on which the worker should listen for messages from other streaming computation workers.
            },
            "packages": [ # Any required packages that need to be fetched in order to execute this WorkItem.
              { # Packages that need to be installed in order for a worker to run the steps of the Dataflow job which will be assigned to its worker pool. This is the mechanism by which the SDK causes code to be loaded onto the workers. For example, the Dataflow Java SDK might use this to install jars containing the user's code and all of the various dependencies (libraries, data files, etc) required in order for that code to run.
                "name": "A String", # The name of the package.
                "location": "A String", # The resource to read the package from. The supported resource type is: Google Cloud Storage: storage.googleapis.com/{bucket} bucket.storage.googleapis.com/
              },
            ],
            "shellTask": { # A task which consists of a shell command for the worker to execute. # Additional information for ShellTask WorkItems.
              "command": "A String", # The shell command to run.
              "exitCode": 42, # Exit code for the task.
            },
            "id": "A String", # Identifies this WorkItem.
          },
        ],
      }

`reportStatus(projectId, jobId, body, x__xgafv=None)`

    Reports the status of dataflow WorkItems leased by a worker.

    Args:
      projectId: string, The project which owns the WorkItem's job. (required)
      jobId: string, The job which the WorkItem is part of. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request to report the status of WorkItems.
        "workerId": "A String", # The ID of the worker reporting the WorkItem status. If this does not match the ID of the worker which the Dataflow service believes currently has the lease on the WorkItem, the report will be dropped (with an error response).
        "currentWorkerTime": "A String", # The current timestamp at the worker.
        "workItemStatuses": [ # The order is unimportant, except that the order of the WorkItemServiceState messages in the ReportWorkItemStatusResponse corresponds to the order of WorkItemStatus messages here.
          { # Conveys a worker's progress through the work described by a WorkItem.
            "reportIndex": "A String", # The report index. When a WorkItem is leased, the lease will contain an initial report index. When a WorkItem's status is reported to the system, the report should be sent with that report index, and the response will contain the index the worker should use for the next report. Reports received with unexpected index values will be rejected by the service. In order to preserve idempotency, the worker should not alter the contents of a report, even if the worker must submit the same report multiple times before getting back a response. The worker should not submit a subsequent report until the response for the previous report had been received from the service.
            "errors": [ # Specifies errors which occurred during processing. If errors are provided, and completed = true, then the WorkItem is considered to have failed.
              { # The `Status` type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by [gRPC](https://github.com/grpc). The error model is designed to be: - Simple to use and understand for most users - Flexible enough to meet unexpected needs # Overview The `Status` message contains three pieces of data: error code, error message, and error details. The error code should be an enum value of [google.rpc.Code][], but it may accept additional error codes if needed. The error message should be a developer-facing English message that helps developers *understand* and *resolve* the error. If a localized user-facing error message is needed, put the localized message in the error details or localize it in the client. The optional error details may contain arbitrary information about the error. There is a predefined set of error detail types in the package `google.rpc` which can be used for common error conditions. # Language mapping The `Status` message is the logical representation of the error model, but it is not necessarily the actual wire format. When the `Status` message is exposed in different client libraries and different wire protocols, it can be mapped differently. For example, it will likely be mapped to some exceptions in Java, but more likely mapped to some error codes in C. # Other uses The error model and the `Status` message can be used in a variety of environments, either with or without APIs, to provide a consistent developer experience across different environments. Example uses of this error model include: - Partial errors. If a service needs to return partial errors to the client, it may embed the `Status` in the normal response to indicate the partial errors. - Workflow errors. A typical workflow has multiple steps. Each step may have a `Status` message for error reporting purpose. - Batch operations. If a client uses batch request and batch response, the `Status` message should be used directly inside batch response, one for each error sub-response. - Asynchronous operations. If an API call embeds asynchronous operation results in its response, the status of those operations should be represented directly using the `Status` message. - Logging. If some API errors are stored in logs, the message `Status` could be used directly after any stripping needed for security/privacy reasons.
                "message": "A String", # A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the [google.rpc.Status.details][google.rpc.Status.details] field, or localized by the client.
                "code": 42, # The status code, which should be an enum value of [google.rpc.Code][].
                "details": [ # A list of messages that carry the error details. There will be a common set of message types for APIs to use.
                  {
                    "a_key": "", # Properties of the object. Contains field @ype with type URL.
                  },
                ],
              },
            ],
            "sourceOperationResponse": { # The result of a SourceOperationRequest, specified in ReportWorkItemStatusRequest.source_operation when the work item is completed. # If the work item represented a SourceOperationRequest, and the work is completed, contains the result of the operation.
              "getMetadata": { # The result of a SourceGetMetadataOperation. # A response to a request to get metadata about a source.
                "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # The computed metadata.
                  "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                  "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                  "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                },
              },
              "split": { # The response to a SourceSplitRequest. # A response to a request to split a source.
                "outcome": "A String", # Indicates whether splitting happened and produced a list of bundles. If this is USE_CURRENT_SOURCE_AS_IS, the current source should be processed "as is" without splitting. "bundles" is ignored in this case. If this is SPLITTING_HAPPENED, then "bundles" contains a list of bundles into which the source was split.
                "bundles": [ # If outcome is SPLITTING_HAPPENED, then this is a list of bundles into which the source was split. Otherwise this field is ignored. This list can be empty, which means the source represents an empty input.
                  { # Specification of one of the bundles produced as a result of splitting a Source (e.g. when executing a SourceSplitRequest, or when splitting an active task using WorkItemStatus.dynamic_source_split), relative to the source being split.
                    "derivationMode": "A String", # What source to base the produced source on (if any).
                    "source": { # A source that records can be read and decoded from. # Specification of the source.
                      "codec": { # The codec to use to decode data read from the source.
                        "a_key": "", # Properties of the object.
                      },
                      "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                        {
                          "a_key": "", # Properties of the object.
                        },
                      ],
                      "spec": { # The source to read from, plus its parameters.
                        "a_key": "", # Properties of the object.
                      },
                      "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                      "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                        "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                        "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                        "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                      },
                    },
                  },
                ],
                "shards": [ # DEPRECATED in favor of bundles.
                  { # DEPRECATED in favor of DerivedSource.
                    "derivationMode": "A String", # DEPRECATED
                    "source": { # A source that records can be read and decoded from. # DEPRECATED
                      "codec": { # The codec to use to decode data read from the source.
                        "a_key": "", # Properties of the object.
                      },
                      "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                        {
                          "a_key": "", # Properties of the object.
                        },
                      ],
                      "spec": { # The source to read from, plus its parameters.
                        "a_key": "", # Properties of the object.
                      },
                      "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                      "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                        "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                        "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                        "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                      },
                    },
                  },
                ],
              },
            },
            "stopPosition": { # Position defines a position within a collection of data. The value can be either the end position, a key (used with ordered collections), a byte offset, or a record index. # A worker may split an active map task in two parts, "primary" and "residual", continuing to process the primary part and returning the residual part into the pool of available work. This event is called a "dynamic split" and is critical to the dynamic work rebalancing feature. The two obtained sub-tasks are called "parts" of the split. The parts, if concatenated, must represent the same input as would be read by the current task if the split did not happen. The exact way in which the original task is decomposed into the two parts is specified either as a position demarcating them (stop_position), or explicitly as two DerivedSources, if this task consumes a user-defined source type (dynamic_source_split). The "current" task is adjusted as a result of the split: after a task with range [A, B) sends a stop_position update at C, its range is considered to be [A, C), e.g.: * Progress should be interpreted relative to the new range, e.g. "75% completed" means "75% of [A, C) completed" * The worker should interpret proposed_stop_position relative to the new range, e.g. "split at 68%" should be interpreted as "split at 68% of [A, C)". * If the worker chooses to split again using stop_position, only stop_positions in [A, C) will be accepted. * Etc. dynamic_source_split has similar semantics: e.g., if a task with source S splits using dynamic_source_split into {P, R} (where P and R must be together equivalent to S), then subsequent progress and proposed_stop_position should be interpreted relative to P, and in a potential subsequent dynamic_source_split into {P', R'}, P' and R' must be together equivalent to P, etc.
              "end": True or False, # Position is past all other positions. Also useful for the end position of an unbounded range.
              "recordIndex": "A String", # Position is a record index.
              "byteOffset": "A String", # Position is a byte offset.
              "key": "A String", # Position is a string key, ordered lexicographically.
              "concatPosition": { # A position that encapsulates an inner position and an index for the inner position. A ConcatPosition can be used by a reader of a source that encapsulates a set of other sources. # CloudPosition is a concat position.
                "index": 42, # Index of the inner source.
                "position": # Object with schema name: Position # Position within the inner source.
              },
              "shufflePosition": "A String", # CloudPosition is a base64 encoded BatchShufflePosition (with FIXED sharding).
            },
            "sourceFork": { # DEPRECATED in favor of DynamicSourceSplit. # DEPRECATED in favor of dynamic_source_split.
              "residualSource": { # Specification of one of the bundles produced as a result of splitting a Source (e.g. when executing a SourceSplitRequest, or when splitting an active task using WorkItemStatus.dynamic_source_split), relative to the source being split. # DEPRECATED
                "derivationMode": "A String", # What source to base the produced source on (if any).
                "source": { # A source that records can be read and decoded from. # Specification of the source.
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
              "primarySource": { # Specification of one of the bundles produced as a result of splitting a Source (e.g. when executing a SourceSplitRequest, or when splitting an active task using WorkItemStatus.dynamic_source_split), relative to the source being split. # DEPRECATED
                "derivationMode": "A String", # What source to base the produced source on (if any).
                "source": { # A source that records can be read and decoded from. # Specification of the source.
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
              "primary": { # DEPRECATED in favor of DerivedSource. # DEPRECATED
                "derivationMode": "A String", # DEPRECATED
                "source": { # A source that records can be read and decoded from. # DEPRECATED
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
              "residual": { # DEPRECATED in favor of DerivedSource. # DEPRECATED
                "derivationMode": "A String", # DEPRECATED
                "source": { # A source that records can be read and decoded from. # DEPRECATED
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
            },
            "requestedLeaseDuration": "A String", # Amount of time the worker requests for its lease.
            "completed": True or False, # True if the WorkItem was completed (successfully or unsuccessfully).
            "workItemId": "A String", # Identifies the WorkItem.
            "dynamicSourceSplit": { # When a task splits using WorkItemStatus.dynamic_source_split, this message describes the two parts of the split relative to the description of the current task's input. # See documentation of stop_position.
              "primary": { # Specification of one of the bundles produced as a result of splitting a Source (e.g. when executing a SourceSplitRequest, or when splitting an active task using WorkItemStatus.dynamic_source_split), relative to the source being split. # Primary part (continued to be processed by worker). Specified relative to the previously-current source. Becomes current.
                "derivationMode": "A String", # What source to base the produced source on (if any).
                "source": { # A source that records can be read and decoded from. # Specification of the source.
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
              "residual": { # Specification of one of the bundles produced as a result of splitting a Source (e.g. when executing a SourceSplitRequest, or when splitting an active task using WorkItemStatus.dynamic_source_split), relative to the source being split. # Residual part (returned to the pool of work). Specified relative to the previously-current source.
                "derivationMode": "A String", # What source to base the produced source on (if any).
                "source": { # A source that records can be read and decoded from. # Specification of the source.
                  "codec": { # The codec to use to decode data read from the source.
                    "a_key": "", # Properties of the object.
                  },
                  "baseSpecs": [ # While splitting, sources may specify the produced bundles as differences against another source, in order to save backend-side memory and allow bigger jobs. For details, see SourceSplitRequest. To support this use case, the full set of parameters of the source is logically obtained by taking the latest explicitly specified value of each parameter in the order: base_specs (later items win), spec (overrides anything in base_specs).
                    {
                      "a_key": "", # Properties of the object.
                    },
                  ],
                  "spec": { # The source to read from, plus its parameters.
                    "a_key": "", # Properties of the object.
                  },
                  "doesNotNeedSplitting": True or False, # Setting this value to true hints to the framework that the source doesn't need splitting, and using SourceSplitRequest on it would yield SOURCE_SPLIT_OUTCOME_USE_CURRENT. E.g. a file splitter may set this to true when splitting a single file into a set of byte ranges of appropriate size, and set this to false when splitting a filepattern into individual files. However, for efficiency, a file splitter may decide to produce file subranges directly from the filepattern to avoid a splitting round-trip. See SourceSplitRequest for an overview of the splitting process. This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                  "metadata": { # Metadata about a Source useful for automatically optimizing and tuning the pipeline, etc. # Optionally, metadata for this source can be supplied right away, avoiding a SourceGetMetadataOperation roundtrip (see SourceOperationRequest). This field is meaningful only in the Source objects populated by the user (e.g. when filling in a DerivedSource). Source objects supplied by the framework to the user don't have this field populated.
                    "infinite": True or False, # Specifies that the size of this source is known to be infinite (this is a streaming source).
                    "estimatedSizeBytes": "A String", # An estimate of the total size (in bytes) of the data that would be read from this source. This estimate is in terms of external storage size, before any decompression or other processing done by the reader.
                    "producesSortedKeys": True or False, # Whether this source is known to produce key/value pairs with the (encoded) keys in lexicographically sorted order.
                  },
                },
              },
            },
            "progress": { # A progress measurement of a WorkItem by a worker. # The WorkItem's approximate progress.
              "position": { # Position defines a position within a collection of data. The value can be either the end position, a key (used with ordered collections), a byte offset, or a record index. # A Position within the work to represent a progress.
                "end": True or False, # Position is past all other positions. Also useful for the end position of an unbounded range.
                "recordIndex": "A String", # Position is a record index.
                "byteOffset": "A String", # Position is a byte offset.
                "key": "A String", # Position is a string key, ordered lexicographically.
                "concatPosition": { # A position that encapsulates an inner position and an index for the inner position. A ConcatPosition can be used by a reader of a source that encapsulates a set of other sources. # CloudPosition is a concat position.
                  "index": 42, # Index of the inner source.
                  "position": # Object with schema name: Position # Position within the inner source.
                },
                "shufflePosition": "A String", # CloudPosition is a base64 encoded BatchShufflePosition (with FIXED sharding).
              },
              "remainingTime": "A String", # Completion as an estimated time remaining.
              "percentComplete": 3.14, # Completion as percentage of the work, from 0.0 (beginning, nothing complete), to 1.0 (end of the work range, entire WorkItem complete).
            },
            "metricUpdates": [ # Worker output metrics (counters) for this WorkItem.
              { # Describes the state of a metric.
                "meanCount": "", # Worker-computed aggregate value for the "Mean" aggregation kind. This holds the count of the aggregated values and is used in combination with mean_sum above to obtain the actual mean aggregate value. The only possible value type is Long.
                "kind": "A String", # Metric aggregation kind. The possible metric aggregation kinds are "Sum", "Max", "Min", "Mean", "Set", "And", and "Or". The specified aggregation kind is case-insensitive. If omitted, this is not an aggregated value but instead a single metric sample value.
                "set": "", # Worker-computed aggregate value for the "Set" aggregation kind. The only possible value type is a list of Values whose type can be Long, Double, or String, according to the metric's type. All Values in the list must be of the same type.
                "name": { # Identifies a metric, by describing the source which generated the metric. # Name of the metric.
                  "origin": "A String", # Origin (namespace) of metric name. May be blank for user-define metrics; will be "dataflow" for metrics defined by the Dataflow service or SDK.
                  "name": "A String", # Worker-defined metric name.
                  "context": { # Zero or more labeled fields which identify the part of the job this metric is associated with, such as the name of a step or collection. For example, built-in counters associated with steps will have context['step'] = . Counters associated with PCollections in the SDK will have context['pcollection'] =
                      # .
                    "a_key": "A String",
                  },
                },
                "cumulative": True or False, # True if this metric is reported as the total cumulative aggregate value accumulated since the worker started working on this WorkItem. By default this is false, indicating that this metric is reported as a delta that is not associated with any WorkItem.
                "updateTime": "A String", # Timestamp associated with the metric value. Optional when workers are reporting work progress; it will be filled in responses from the metrics API.
                "scalar": "", # Worker-computed aggregate value for aggregation kinds "Sum", "Max", "Min", "And", and "Or". The possible value types are Long, Double, and Boolean.
                "meanSum": "", # Worker-computed aggregate value for the "Mean" aggregation kind. This holds the sum of the aggregated values and is used in combination with mean_count below to obtain the actual mean aggregate value. The only possible value types are Long and Double.
                "internal": "", # Worker-computed aggregate value for internal use by the Dataflow service.
              },
            ],
          },
        ],
      }

      x__xgafv: string, V1 error format.

    Returns:
      An object of the form:

        { # Response from a request to report the status of WorkItems.
        "workItemServiceStates": [ # A set of messages indicating the service-side state for each WorkItem whose status was reported, in the same order as the WorkItemStatus messages in the ReportWorkItemStatusRequest which resulting in this response.
          { # The Dataflow service's idea of the current state of a WorkItem being processed by a worker.
            "reportStatusInterval": "A String", # New recommended reporting interval.
            "suggestedStopPosition": { # Position defines a position within a collection of data. The value can be either the end position, a key (used with ordered collections), a byte offset, or a record index. # Obsolete, always empty.
              "end": True or False, # Position is past all other positions. Also useful for the end position of an unbounded range.
              "recordIndex": "A String", # Position is a record index.
              "byteOffset": "A String", # Position is a byte offset.
              "key": "A String", # Position is a string key, ordered lexicographically.
              "concatPosition": { # A position that encapsulates an inner position and an index for the inner position. A ConcatPosition can be used by a reader of a source that encapsulates a set of other sources. # CloudPosition is a concat position.
                "index": 42, # Index of the inner source.
                "position": # Object with schema name: Position # Position within the inner source.
              },
              "shufflePosition": "A String", # CloudPosition is a base64 encoded BatchShufflePosition (with FIXED sharding).
            },
            "harnessData": { # Other data returned by the service, specific to the particular worker harness.
              "a_key": "", # Properties of the object.
            },
            "nextReportIndex": "A String", # The index value to use for the next report sent by the worker. Note: If the report call fails for whatever reason, the worker should reuse this index for subsequent report attempts.
            "leaseExpireTime": "A String", # Time at which the current lease will expire.
            "suggestedStopPoint": { # A progress measurement of a WorkItem by a worker. # The progress point in the WorkItem where the Dataflow service suggests that the worker truncate the task.
              "position": { # Position defines a position within a collection of data. The value can be either the end position, a key (used with ordered collections), a byte offset, or a record index. # A Position within the work to represent a progress.
                "end": True or False, # Position is past all other positions. Also useful for the end position of an unbounded range.
                "recordIndex": "A String", # Position is a record index.
                "byteOffset": "A String", # Position is a byte offset.
                "key": "A String", # Position is a string key, ordered lexicographically.
                "concatPosition": { # A position that encapsulates an inner position and an index for the inner position. A ConcatPosition can be used by a reader of a source that encapsulates a set of other sources. # CloudPosition is a concat position.
                  "index": 42, # Index of the inner source.
                  "position": # Object with schema name: Position # Position within the inner source.
                },
                "shufflePosition": "A String", # CloudPosition is a base64 encoded BatchShufflePosition (with FIXED sharding).
              },
              "remainingTime": "A String", # Completion as an estimated time remaining.
              "percentComplete": 3.14, # Completion as percentage of the work, from 0.0 (beginning, nothing complete), to 1.0 (end of the work range, entire WorkItem complete).
            },
          },
        ],
      }