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Welcome to the AWS Code Examples Repository. This repo contains code examples used in the AWS documentation, AWS SDK Developer Guides, and more. For more information, see the Readme.md file below.

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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
3584 c++ legacy cleanup dynamodb (#4096) * first commit * Additional legacy cleanup * working on tests * essentially finished * snippet fix * dynamodb legacy cleanup linting fixes linting changes Co-authored-by: Corey Pyle <corepyle@amazon.com>
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/**
* 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.
*
**/
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#include <aws/core/Aws.h>
#include <aws/dynamodb/DynamoDBClient.h>
#include <aws/dynamodb/model/AttributeDefinition.h>
#include <aws/dynamodb/model/BatchGetItemRequest.h>
#include <aws/dynamodb/model/KeysAndAttributes.h>
#include <iostream>
3584 c++ legacy cleanup dynamodb (#4096) * first commit * Additional legacy cleanup * working on tests * essentially finished * snippet fix * dynamodb legacy cleanup linting fixes linting changes Co-authored-by: Corey Pyle <corepyle@amazon.com>
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#include "dynamodb_samples.h"
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3584 c++ legacy cleanup dynamodb (#4096) * first commit * Additional legacy cleanup * working on tests * essentially finished * snippet fix * dynamodb legacy cleanup linting fixes linting changes Co-authored-by: Corey Pyle <corepyle@amazon.com>
2022-12-20 11:23:09 -05:00
/*
* For instructions on populating a table with sample data, see
* https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/SampleData.html.
*
* This example uses the "Forum.json" and "ProductCatalog.json" sample data.
*/
// snippet-start:[cpp.example_code.dynamodb.batch_get_item]
//! Batch get items from different Amazon DynamoDB tables.
/*!
\sa batchGetItem()
\param clientConfiguration: AWS client configuration.
\return bool: Function succeeded.
*/
bool AwsDoc::DynamoDB::batchGetItem(
const Aws::Client::ClientConfiguration &clientConfiguration) {
Aws::DynamoDB::DynamoDBClient dynamoClient(clientConfiguration);
Aws::DynamoDB::Model::BatchGetItemRequest request;
// Table1: Forum.
Aws::String table1Name = "Forum";
Aws::DynamoDB::Model::KeysAndAttributes table1KeysAndAttributes;
// Table1: Projection expression.
table1KeysAndAttributes.SetProjectionExpression("#n, Category, Messages, #v");
// Table1: Expression attribute names.
Aws::Http::HeaderValueCollection headerValueCollection;
headerValueCollection.emplace("#n", "Name");
headerValueCollection.emplace("#v", "Views");
table1KeysAndAttributes.SetExpressionAttributeNames(headerValueCollection);
// Table1: Set key name, type, and value to search.
std::vector<Aws::String> nameValues = {"Amazon DynamoDB", "Amazon S3"};
for (const Aws::String &name: nameValues) {
Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> keys;
Aws::DynamoDB::Model::AttributeValue key;
key.SetS(name);
keys.emplace("Name", key);
table1KeysAndAttributes.AddKeys(keys);
}
Aws::Map<Aws::String, Aws::DynamoDB::Model::KeysAndAttributes> requestItems;
requestItems.emplace(table1Name, table1KeysAndAttributes);
// Table2: ProductCatalog.
Aws::String table2Name = "ProductCatalog";
Aws::DynamoDB::Model::KeysAndAttributes table2KeysAndAttributes;
table2KeysAndAttributes.SetProjectionExpression("Title, Price, Color");
// Table2: Set key name, type, and value to search.
std::vector<Aws::String> idValues = {"102", "103", "201"};
for (const Aws::String &id: idValues) {
Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> keys;
Aws::DynamoDB::Model::AttributeValue key;
key.SetN(id);
keys.emplace("Id", key);
table2KeysAndAttributes.AddKeys(keys);
}
requestItems.emplace(table2Name, table2KeysAndAttributes);
bool result = true;
do { // Use a do loop to handle pagination.
request.SetRequestItems(requestItems);
const Aws::DynamoDB::Model::BatchGetItemOutcome &outcome = dynamoClient.BatchGetItem(
request);
if (outcome.IsSuccess()) {
for (const auto &responsesMapEntry: outcome.GetResult().GetResponses()) {
Aws::String tableName = responsesMapEntry.first;
const Aws::Vector<Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue>> &tableResults = responsesMapEntry.second;
std::cout << "Retrieved " << tableResults.size()
<< " responses for table '" << tableName << "'.\n"
<< std::endl;
if (tableName == "Forum") {
std::cout << "Name | Category | Message | Views" << std::endl;
for (const Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> &item: tableResults) {
std::cout << item.at("Name").GetS() << " | ";
std::cout << item.at("Category").GetS() << " | ";
std::cout << (item.count("Message") == 0 ? "" : item.at(
"Messages").GetN()) << " | ";
std::cout << (item.count("Views") == 0 ? "" : item.at(
"Views").GetN()) << std::endl;
}
}
else {
std::cout << "Title | Price | Color" << std::endl;
for (const Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> &item: tableResults) {
std::cout << item.at("Title").GetS() << " | ";
std::cout << (item.count("Price") == 0 ? "" : item.at(
"Price").GetN());
if (item.count("Color")) {
std::cout << " | ";
for (const std::shared_ptr<Aws::DynamoDB::Model::AttributeValue> &listItem: item.at(
"Color").GetL())
std::cout << listItem->GetS() << " ";
}
std::cout << std::endl;
}
}
std::cout << std::endl;
}
// If necessary, repeat request for remaining items.
requestItems = outcome.GetResult().GetUnprocessedKeys();
}
else {
std::cerr << "Batch get item failed: " << outcome.GetError().GetMessage()
<< std::endl;
result = false;
break;
}
} while (!requestItems.empty());
return result;
}
// snippet-end:[cpp.example_code.dynamodb.batch_get_item]
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3584 c++ legacy cleanup dynamodb (#4096) * first commit * Additional legacy cleanup * working on tests * essentially finished * snippet fix * dynamodb legacy cleanup linting fixes linting changes Co-authored-by: Corey Pyle <corepyle@amazon.com>
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/*
*
* main function
*
* Usage: 'run_batch_get_item'
*
* Prerequisites: Pre-populated DynamoDB tables.
*
* For instructions on populating a table with sample data, see
* https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/SampleData.html.
*
* This example uses the "Forum.json" and "ProductCatalog.json" sample data.
* This example requires pre-populated "Forum" and "ProductCatalog" tables.
*
*/
#ifndef TESTING_BUILD
int main(int argc, char **argv) {
(void) argc; // Suppress unused warning.
(void) argv; // Suppress unused warning.
Aws::SDKOptions options;
Aws::InitAPI(options);
{
Aws::Client::ClientConfiguration clientConfig;
// Optional: Set to the AWS Region (overrides config file).
// clientConfig.region = "us-east-1";
AwsDoc::DynamoDB::batchGetItem(clientConfig);
}
Aws::ShutdownAPI(options);
return 0;
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}
3584 c++ legacy cleanup dynamodb (#4096) * first commit * Additional legacy cleanup * working on tests * essentially finished * snippet fix * dynamodb legacy cleanup linting fixes linting changes Co-authored-by: Corey Pyle <corepyle@amazon.com>
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#endif // TESTING_BUILD
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