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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
/**
* Before running this C++ code example, set up your development environment, including your credentials.
*
* For more information, see the following documentation topic:
*
* https://docs.aws.amazon.com/sdk-for-cpp/v1/developer-guide/getting-started.html
*
* For information on the structure of the code examples and how to build and run the examples, see
* https://docs.aws.amazon.com/sdk-for-cpp/v1/developer-guide/getting-started-code-examples.html.
*
**/
// snippet-start:[dynamodb.cpp.get_item.inc]
#include <aws/core/Aws.h>
#include <aws/dynamodb/DynamoDBClient.h>
#include <aws/dynamodb/model/AttributeDefinition.h>
#include <aws/dynamodb/model/GetItemRequest.h>
#include <iostream>
// snippet-end:[dynamodb.cpp.get_item.inc]
#include "dynamodb_samples.h"
// snippet-start:[dynamodb.cpp.get_item.code]
//! Get an item from an Amazon DynamoDB table.
/*!
\sa getItem()
\param tableName: The table name.
\param partitionKey: The partition key.
\param partitionValue: The value for the partition key.
\param clientConfiguration: AWS client configuration.
\return bool: Function succeeded.
*/
bool AwsDoc::DynamoDB::getItem(const Aws::String &tableName,
const Aws::String &partitionKey,
const Aws::String &partitionValue,
const Aws::Client::ClientConfiguration &clientConfiguration) {
Aws::DynamoDB::DynamoDBClient dynamoClient(clientConfiguration);
Aws::DynamoDB::Model::GetItemRequest request;
// Set up the request.
request.SetTableName(tableName);
request.AddKey(partitionKey,
Aws::DynamoDB::Model::AttributeValue().SetS(partitionValue));
// Retrieve the item's fields and values.
const Aws::DynamoDB::Model::GetItemOutcome &outcome = dynamoClient.GetItem(request);
if (outcome.IsSuccess()) {
// Reference the retrieved fields/values.
const Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> &item = outcome.GetResult().GetItem();
if (!item.empty()) {
// Output each retrieved field and its value.
for (const auto &i: item)
std::cout << "Values: " << i.first << ": " << i.second.GetS()
<< std::endl;
}
else {
std::cout << "No item found with the key " << partitionKey << std::endl;
}
}
else {
std::cerr << "Failed to get item: " << outcome.GetError().GetMessage();
}
return outcome.IsSuccess();
}
// snippet-end:[dynamodb.cpp.get_item.code]
/*
*
* main function
*
* Usage: 'run_get_item <table_name> <partition_key> <partition_value>'
*
* Prerequisites: Create DynamoDB table named <table_name> that contains
* an item with <partition_value> for its <partition_key>.
*
*/
#ifndef TESTING_BUILD
int main(int argc, char **argv) {
if (argc < 4) {
std::cout << R"("Usage:
run_get_item <table_name> <partition_key> <partition_value>
Where:
table - The table to get the item from.
partition_key - The partition key of the table,
partition_value - The item value for the partition key.
Example:
run_get_item HelloTable Name Joe
)";
return 1;
}
Aws::SDKOptions options;
Aws::InitAPI(options);
{
const Aws::String tableName = (argv[1]);
const Aws::String partitionKey = (argv[2]);
const Aws::String partitionValue = (argv[3]);
Aws::Client::ClientConfiguration clientConfig;
// Optional: Set to the AWS Region (overrides config file).
// clientConfig.region = "us-east-1";
AwsDoc::DynamoDB::getItem(tableName, partitionKey, partitionValue,
clientConfig);
}
Aws::ShutdownAPI(options);
return 0;
}
#endif // TESTING_BUILD