// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: google/cloud/tasks/v2beta3/target.proto

package com.google.cloud.tasks.v2beta3;

/**
 * <pre>
 * App Engine Routing.
 * Specifies the target URI. Since this target type dispatches tasks to secure
 * app handlers, unsecure app handlers, and URIs restricted with
 * [`login: admin`](https://cloud.google.com/appengine/docs/standard/python/config/appref)
 * the protocol (for example, HTTP or HTTPS) cannot be explictly specified.
 * Task dispatches do not follow redirects and cannot target URI paths
 * restricted with
 * [`login: required`](https://cloud.google.com/appengine/docs/standard/python/config/appref)
 * because tasks are not run as any user.
 * For more information about services, versions, and instances see
 * [An Overview of App Engine](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine),
 * [Microservices Architecture on Google App Engine](https://cloud.google.com/appengine/docs/python/microservices-on-app-engine),
 * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed),
 * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
 * </pre>
 *
 * Protobuf type {@code google.cloud.tasks.v2beta3.AppEngineRouting}
 */
public  final class AppEngineRouting extends
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  private volatile java.lang.Object service_;
  /**
   * <pre>
   * App service.
   * By default, the task is sent to the service which is the default
   * service when the task is attempted.
   * For some queues or tasks which were created using the App Engine
   * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
   * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
   * which were created using the App Engine SDK use a custom domain
   * name; custom domains are not parsed by Cloud Tasks. If
   * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
   * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
   * </pre>
   *
   * <code>string service = 1;</code>
   */
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  /**
   * <pre>
   * App service.
   * By default, the task is sent to the service which is the default
   * service when the task is attempted.
   * For some queues or tasks which were created using the App Engine
   * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
   * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
   * which were created using the App Engine SDK use a custom domain
   * name; custom domains are not parsed by Cloud Tasks. If
   * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
   * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
   * </pre>
   *
   * <code>string service = 1;</code>
   */
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  public static final int VERSION_FIELD_NUMBER = 2;
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  /**
   * <pre>
   * App version.
   * By default, the task is sent to the version which is the default
   * version when the task is attempted.
   * For some queues or tasks which were created using the App Engine
   * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
   * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
   * which were created using the App Engine SDK use a custom domain
   * name; custom domains are not parsed by Cloud Tasks. If
   * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
   * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
   * </pre>
   *
   * <code>string version = 2;</code>
   */
  public java.lang.String getVersion() {
    java.lang.Object ref = version_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
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  /**
   * <pre>
   * App version.
   * By default, the task is sent to the version which is the default
   * version when the task is attempted.
   * For some queues or tasks which were created using the App Engine
   * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
   * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
   * which were created using the App Engine SDK use a custom domain
   * name; custom domains are not parsed by Cloud Tasks. If
   * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
   * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
   * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
   * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
   * </pre>
   *
   * <code>string version = 2;</code>
   */
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  public static final int INSTANCE_FIELD_NUMBER = 3;
  private volatile java.lang.Object instance_;
  /**
   * <pre>
   * App instance.
   * By default, the task is sent to an instance which is available when
   * the task is attempted.
   * Requests can only be sent to a specific instance if
   * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
   * App Engine Flex does not support instances. For more information, see
   * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
   * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
   * </pre>
   *
   * <code>string instance = 3;</code>
   */
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      java.lang.String s = bs.toStringUtf8();
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      return s;
    }
  }
  /**
   * <pre>
   * App instance.
   * By default, the task is sent to an instance which is available when
   * the task is attempted.
   * Requests can only be sent to a specific instance if
   * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
   * App Engine Flex does not support instances. For more information, see
   * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
   * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
   * </pre>
   *
   * <code>string instance = 3;</code>
   */
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  }

  public static final int HOST_FIELD_NUMBER = 4;
  private volatile java.lang.Object host_;
  /**
   * <pre>
   * Output only. The host that the task is sent to.
   * The host is constructed from the domain name of the app associated with
   * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
   * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
   * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
   * the App Engine SDK might have a custom domain name.
   * For more information, see
   * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
   * </pre>
   *
   * <code>string host = 4;</code>
   */
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      java.lang.String s = bs.toStringUtf8();
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      return s;
    }
  }
  /**
   * <pre>
   * Output only. The host that the task is sent to.
   * The host is constructed from the domain name of the app associated with
   * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
   * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
   * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
   * the App Engine SDK might have a custom domain name.
   * For more information, see
   * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
   * </pre>
   *
   * <code>string host = 4;</code>
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  /**
   * <pre>
   * App Engine Routing.
   * Specifies the target URI. Since this target type dispatches tasks to secure
   * app handlers, unsecure app handlers, and URIs restricted with
   * [`login: admin`](https://cloud.google.com/appengine/docs/standard/python/config/appref)
   * the protocol (for example, HTTP or HTTPS) cannot be explictly specified.
   * Task dispatches do not follow redirects and cannot target URI paths
   * restricted with
   * [`login: required`](https://cloud.google.com/appengine/docs/standard/python/config/appref)
   * because tasks are not run as any user.
   * For more information about services, versions, and instances see
   * [An Overview of App Engine](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine),
   * [Microservices Architecture on Google App Engine](https://cloud.google.com/appengine/docs/python/microservices-on-app-engine),
   * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed),
   * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
   * </pre>
   *
   * Protobuf type {@code google.cloud.tasks.v2beta3.AppEngineRouting}
   */
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    }

    @java.lang.Override
    public com.google.cloud.tasks.v2beta3.AppEngineRouting build() {
      com.google.cloud.tasks.v2beta3.AppEngineRouting result = buildPartial();
      if (!result.isInitialized()) {
        throw newUninitializedMessageException(result);
      }
      return result;
    }

    @java.lang.Override
    public com.google.cloud.tasks.v2beta3.AppEngineRouting buildPartial() {
      com.google.cloud.tasks.v2beta3.AppEngineRouting result = new com.google.cloud.tasks.v2beta3.AppEngineRouting(this);
      result.service_ = service_;
      result.version_ = version_;
      result.instance_ = instance_;
      result.host_ = host_;
      onBuilt();
      return result;
    }

    @java.lang.Override
    public Builder clone() {
      return (Builder) super.clone();
    }
    @java.lang.Override
    public Builder setField(
        com.google.protobuf.Descriptors.FieldDescriptor field,
        java.lang.Object value) {
      return (Builder) super.setField(field, value);
    }
    @java.lang.Override
    public Builder clearField(
        com.google.protobuf.Descriptors.FieldDescriptor field) {
      return (Builder) super.clearField(field);
    }
    @java.lang.Override
    public Builder clearOneof(
        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
      return (Builder) super.clearOneof(oneof);
    }
    @java.lang.Override
    public Builder setRepeatedField(
        com.google.protobuf.Descriptors.FieldDescriptor field,
        int index, java.lang.Object value) {
      return (Builder) super.setRepeatedField(field, index, value);
    }
    @java.lang.Override
    public Builder addRepeatedField(
        com.google.protobuf.Descriptors.FieldDescriptor field,
        java.lang.Object value) {
      return (Builder) super.addRepeatedField(field, value);
    }
    @java.lang.Override
    public Builder mergeFrom(com.google.protobuf.Message other) {
      if (other instanceof com.google.cloud.tasks.v2beta3.AppEngineRouting) {
        return mergeFrom((com.google.cloud.tasks.v2beta3.AppEngineRouting)other);
      } else {
        super.mergeFrom(other);
        return this;
      }
    }

    public Builder mergeFrom(com.google.cloud.tasks.v2beta3.AppEngineRouting other) {
      if (other == com.google.cloud.tasks.v2beta3.AppEngineRouting.getDefaultInstance()) return this;
      if (!other.getService().isEmpty()) {
        service_ = other.service_;
        onChanged();
      }
      if (!other.getVersion().isEmpty()) {
        version_ = other.version_;
        onChanged();
      }
      if (!other.getInstance().isEmpty()) {
        instance_ = other.instance_;
        onChanged();
      }
      if (!other.getHost().isEmpty()) {
        host_ = other.host_;
        onChanged();
      }
      this.mergeUnknownFields(other.unknownFields);
      onChanged();
      return this;
    }

    @java.lang.Override
    public final boolean isInitialized() {
      return true;
    }

    @java.lang.Override
    public Builder mergeFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      com.google.cloud.tasks.v2beta3.AppEngineRouting parsedMessage = null;
      try {
        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        parsedMessage = (com.google.cloud.tasks.v2beta3.AppEngineRouting) e.getUnfinishedMessage();
        throw e.unwrapIOException();
      } finally {
        if (parsedMessage != null) {
          mergeFrom(parsedMessage);
        }
      }
      return this;
    }

    private java.lang.Object service_ = "";
    /**
     * <pre>
     * App service.
     * By default, the task is sent to the service which is the default
     * service when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string service = 1;</code>
     */
    public java.lang.String getService() {
      java.lang.Object ref = service_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs =
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        service_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     * <pre>
     * App service.
     * By default, the task is sent to the service which is the default
     * service when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string service = 1;</code>
     */
    public com.google.protobuf.ByteString
        getServiceBytes() {
      java.lang.Object ref = service_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        service_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * <pre>
     * App service.
     * By default, the task is sent to the service which is the default
     * service when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string service = 1;</code>
     */
    public Builder setService(
        java.lang.String value) {
      if (value == null) {
    throw new NullPointerException();
  }
  
      service_ = value;
      onChanged();
      return this;
    }
    /**
     * <pre>
     * App service.
     * By default, the task is sent to the service which is the default
     * service when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string service = 1;</code>
     */
    public Builder clearService() {
      
      service_ = getDefaultInstance().getService();
      onChanged();
      return this;
    }
    /**
     * <pre>
     * App service.
     * By default, the task is sent to the service which is the default
     * service when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string service = 1;</code>
     */
    public Builder setServiceBytes(
        com.google.protobuf.ByteString value) {
      if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
      
      service_ = value;
      onChanged();
      return this;
    }

    private java.lang.Object version_ = "";
    /**
     * <pre>
     * App version.
     * By default, the task is sent to the version which is the default
     * version when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string version = 2;</code>
     */
    public java.lang.String getVersion() {
      java.lang.Object ref = version_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs =
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        version_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     * <pre>
     * App version.
     * By default, the task is sent to the version which is the default
     * version when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string version = 2;</code>
     */
    public com.google.protobuf.ByteString
        getVersionBytes() {
      java.lang.Object ref = version_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        version_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * <pre>
     * App version.
     * By default, the task is sent to the version which is the default
     * version when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string version = 2;</code>
     */
    public Builder setVersion(
        java.lang.String value) {
      if (value == null) {
    throw new NullPointerException();
  }
  
      version_ = value;
      onChanged();
      return this;
    }
    /**
     * <pre>
     * App version.
     * By default, the task is sent to the version which is the default
     * version when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string version = 2;</code>
     */
    public Builder clearVersion() {
      
      version_ = getDefaultInstance().getVersion();
      onChanged();
      return this;
    }
    /**
     * <pre>
     * App version.
     * By default, the task is sent to the version which is the default
     * version when the task is attempted.
     * For some queues or tasks which were created using the App Engine
     * Task Queue API, [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable
     * into [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. For example, some tasks
     * which were created using the App Engine SDK use a custom domain
     * name; custom domains are not parsed by Cloud Tasks. If
     * [host][google.cloud.tasks.v2beta3.AppEngineRouting.host] is not parsable, then
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service],
     * [version][google.cloud.tasks.v2beta3.AppEngineRouting.version], and
     * [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance] are the empty string.
     * </pre>
     *
     * <code>string version = 2;</code>
     */
    public Builder setVersionBytes(
        com.google.protobuf.ByteString value) {
      if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
      
      version_ = value;
      onChanged();
      return this;
    }

    private java.lang.Object instance_ = "";
    /**
     * <pre>
     * App instance.
     * By default, the task is sent to an instance which is available when
     * the task is attempted.
     * Requests can only be sent to a specific instance if
     * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
     * App Engine Flex does not support instances. For more information, see
     * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
     * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string instance = 3;</code>
     */
    public java.lang.String getInstance() {
      java.lang.Object ref = instance_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs =
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        instance_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     * <pre>
     * App instance.
     * By default, the task is sent to an instance which is available when
     * the task is attempted.
     * Requests can only be sent to a specific instance if
     * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
     * App Engine Flex does not support instances. For more information, see
     * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
     * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string instance = 3;</code>
     */
    public com.google.protobuf.ByteString
        getInstanceBytes() {
      java.lang.Object ref = instance_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        instance_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * <pre>
     * App instance.
     * By default, the task is sent to an instance which is available when
     * the task is attempted.
     * Requests can only be sent to a specific instance if
     * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
     * App Engine Flex does not support instances. For more information, see
     * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
     * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string instance = 3;</code>
     */
    public Builder setInstance(
        java.lang.String value) {
      if (value == null) {
    throw new NullPointerException();
  }
  
      instance_ = value;
      onChanged();
      return this;
    }
    /**
     * <pre>
     * App instance.
     * By default, the task is sent to an instance which is available when
     * the task is attempted.
     * Requests can only be sent to a specific instance if
     * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
     * App Engine Flex does not support instances. For more information, see
     * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
     * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string instance = 3;</code>
     */
    public Builder clearInstance() {
      
      instance_ = getDefaultInstance().getInstance();
      onChanged();
      return this;
    }
    /**
     * <pre>
     * App instance.
     * By default, the task is sent to an instance which is available when
     * the task is attempted.
     * Requests can only be sent to a specific instance if
     * [manual scaling is used in App Engine Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
     * App Engine Flex does not support instances. For more information, see
     * [App Engine Standard request routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
     * and [App Engine Flex request routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string instance = 3;</code>
     */
    public Builder setInstanceBytes(
        com.google.protobuf.ByteString value) {
      if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
      
      instance_ = value;
      onChanged();
      return this;
    }

    private java.lang.Object host_ = "";
    /**
     * <pre>
     * Output only. The host that the task is sent to.
     * The host is constructed from the domain name of the app associated with
     * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
     * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
     * the App Engine SDK might have a custom domain name.
     * For more information, see
     * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string host = 4;</code>
     */
    public java.lang.String getHost() {
      java.lang.Object ref = host_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs =
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        host_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     * <pre>
     * Output only. The host that the task is sent to.
     * The host is constructed from the domain name of the app associated with
     * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
     * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
     * the App Engine SDK might have a custom domain name.
     * For more information, see
     * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string host = 4;</code>
     */
    public com.google.protobuf.ByteString
        getHostBytes() {
      java.lang.Object ref = host_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        host_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * <pre>
     * Output only. The host that the task is sent to.
     * The host is constructed from the domain name of the app associated with
     * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
     * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
     * the App Engine SDK might have a custom domain name.
     * For more information, see
     * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string host = 4;</code>
     */
    public Builder setHost(
        java.lang.String value) {
      if (value == null) {
    throw new NullPointerException();
  }
  
      host_ = value;
      onChanged();
      return this;
    }
    /**
     * <pre>
     * Output only. The host that the task is sent to.
     * The host is constructed from the domain name of the app associated with
     * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
     * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
     * the App Engine SDK might have a custom domain name.
     * For more information, see
     * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string host = 4;</code>
     */
    public Builder clearHost() {
      
      host_ = getDefaultInstance().getHost();
      onChanged();
      return this;
    }
    /**
     * <pre>
     * Output only. The host that the task is sent to.
     * The host is constructed from the domain name of the app associated with
     * the queue's project ID (for example &lt;app-id&gt;.appspot.com), and the
     * [service][google.cloud.tasks.v2beta3.AppEngineRouting.service], [version][google.cloud.tasks.v2beta3.AppEngineRouting.version],
     * and [instance][google.cloud.tasks.v2beta3.AppEngineRouting.instance]. Tasks which were created using
     * the App Engine SDK might have a custom domain name.
     * For more information, see
     * [How Requests are Routed](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
     * </pre>
     *
     * <code>string host = 4;</code>
     */
    public Builder setHostBytes(
        com.google.protobuf.ByteString value) {
      if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
      
      host_ = value;
      onChanged();
      return this;
    }
    @java.lang.Override
    public final Builder setUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFieldsProto3(unknownFields);
    }

    @java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }


    // @@protoc_insertion_point(builder_scope:google.cloud.tasks.v2beta3.AppEngineRouting)
  }

  // @@protoc_insertion_point(class_scope:google.cloud.tasks.v2beta3.AppEngineRouting)
  private static final com.google.cloud.tasks.v2beta3.AppEngineRouting DEFAULT_INSTANCE;
  static {
    DEFAULT_INSTANCE = new com.google.cloud.tasks.v2beta3.AppEngineRouting();
  }

  public static com.google.cloud.tasks.v2beta3.AppEngineRouting getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<AppEngineRouting>
      PARSER = new com.google.protobuf.AbstractParser<AppEngineRouting>() {
    @java.lang.Override
    public AppEngineRouting parsePartialFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return new AppEngineRouting(input, extensionRegistry);
    }
  };

  public static com.google.protobuf.Parser<AppEngineRouting> parser() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Parser<AppEngineRouting> getParserForType() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.cloud.tasks.v2beta3.AppEngineRouting getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }

}

