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/*
* Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with
* the License. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*/
package com.amazonaws.services.dynamodbv2;
import org.w3c.dom.*;
import java.net.*;
import java.util.*;
import java.util.Map.Entry;
import org.apache.commons.logging.*;
import com.amazonaws.*;
import com.amazonaws.auth.*;
import com.amazonaws.auth.presign.PresignerParams;
import com.amazonaws.handlers.*;
import com.amazonaws.http.*;
import com.amazonaws.internal.*;
import com.amazonaws.internal.auth.*;
import com.amazonaws.metrics.*;
import com.amazonaws.regions.*;
import com.amazonaws.transform.*;
import com.amazonaws.util.*;
import com.amazonaws.protocol.json.*;
import com.amazonaws.util.AWSRequestMetrics.Field;
import com.amazonaws.annotation.ThreadSafe;
import com.amazonaws.client.AwsSyncClientParams;
import com.amazonaws.services.dynamodbv2.waiters.AmazonDynamoDBWaiters;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.dynamodbv2.model.*;
import com.amazonaws.services.dynamodbv2.model.transform.*;
/**
* Client for accessing DynamoDB. All service calls made using this client are blocking, and will not return until the
* service call completes.
*
* Amazon DynamoDB
*
* This is the Amazon DynamoDB API Reference. This guide provides descriptions of the low-level DynamoDB API.
*
*
* This guide is intended for use with the following DynamoDB documentation:
*
*
* -
*
* Amazon DynamoDB Getting Started
* Guide - provides hands-on exercises that help you learn the basics of working with DynamoDB. If you are new to
* DynamoDB, we recommend that you begin with the Getting Started Guide.
*
*
* -
*
* Amazon DynamoDB Developer Guide -
* contains detailed information about DynamoDB concepts, usage, and best practices.
*
*
* -
*
* Amazon DynamoDB Streams API Reference -
* provides descriptions and samples of the DynamoDB Streams API. (For more information, see Capturing Table Activity with
* DynamoDB Streams in the Amazon DynamoDB Developer Guide.)
*
*
*
*
* Instead of making the requests to the low-level DynamoDB API directly from your application, we recommend that you
* use the AWS Software Development Kits (SDKs). The easy-to-use libraries in the AWS SDKs make it unnecessary to call
* the low-level DynamoDB API directly from your application. The libraries take care of request authentication,
* serialization, and connection management. For more information, see Using the AWS SDKs with
* DynamoDB in the Amazon DynamoDB Developer Guide.
*
*
* If you decide to code against the low-level DynamoDB API directly, you will need to write the necessary code to
* authenticate your requests. For more information on signing your requests, see Using the DynamoDB API in the
* Amazon DynamoDB Developer Guide.
*
*
* The following are short descriptions of each low-level API action, organized by function.
*
*
* Managing Tables
*
*
* -
*
* CreateTable - Creates a table with user-specified provisioned throughput settings. You must define a primary
* key for the table - either a simple primary key (partition key), or a composite primary key (partition key and sort
* key). Optionally, you can create one or more secondary indexes, which provide fast data access using non-key
* attributes.
*
*
* -
*
* DescribeTable - Returns metadata for a table, such as table size, status, and index information.
*
*
* -
*
* UpdateTable - Modifies the provisioned throughput settings for a table. Optionally, you can modify the
* provisioned throughput settings for global secondary indexes on the table.
*
*
* -
*
* ListTables - Returns a list of all tables associated with the current AWS account and endpoint.
*
*
* -
*
* DeleteTable - Deletes a table and all of its indexes.
*
*
*
*
* For conceptual information about managing tables, see Working with Tables
* in the Amazon DynamoDB Developer Guide.
*
*
* Reading Data
*
*
* -
*
* GetItem - Returns a set of attributes for the item that has a given primary key. By default, GetItem
* performs an eventually consistent read; however, applications can request a strongly consistent read instead.
*
*
* -
*
* BatchGetItem - Performs multiple GetItem requests for data items using their primary keys, from one
* table or multiple tables. The response from BatchGetItem has a size limit of 16 MB and returns a maximum of
* 100 items. Both eventually consistent and strongly consistent reads can be used.
*
*
* -
*
* Query - Returns one or more items from a table or a secondary index. You must provide a specific value for the
* partition key. You can narrow the scope of the query using comparison operators against a sort key value, or on the
* index key. Query supports either eventual or strong consistency. A single response has a size limit of 1 MB.
*
*
* -
*
* Scan - Reads every item in a table; the result set is eventually consistent. You can limit the number of items
* returned by filtering the data attributes, using conditional expressions. Scan can be used to enable ad-hoc
* querying of a table against non-key attributes; however, since this is a full table scan without using an index,
* Scan should not be used for any application query use case that requires predictable performance.
*
*
*
*
* For conceptual information about reading data, see Working with Items
* and Query and Scan
* Operations in the Amazon DynamoDB Developer Guide.
*
*
* Modifying Data
*
*
* -
*
* PutItem - Creates a new item, or replaces an existing item with a new item (including all the attributes). By
* default, if an item in the table already exists with the same primary key, the new item completely replaces the
* existing item. You can use conditional operators to replace an item only if its attribute values match certain
* conditions, or to insert a new item only if that item doesn't already exist.
*
*
* -
*
* UpdateItem - Modifies the attributes of an existing item. You can also use conditional operators to perform an
* update only if the item's attribute values match certain conditions.
*
*
* -
*
* DeleteItem - Deletes an item in a table by primary key. You can use conditional operators to perform a delete
* an item only if the item's attribute values match certain conditions.
*
*
* -
*
* BatchWriteItem - Performs multiple PutItem and DeleteItem requests across multiple tables in a
* single request. A failure of any request(s) in the batch will not cause the entire BatchWriteItem operation to
* fail. Supports batches of up to 25 items to put or delete, with a maximum total request size of 16 MB.
*
*
*
*
* For conceptual information about modifying data, see Working with Items
* and Query and Scan
* Operations in the Amazon DynamoDB Developer Guide.
*
*/
@ThreadSafe
public class AmazonDynamoDBClient extends AmazonWebServiceClient implements AmazonDynamoDB {
// register the service specific set of predefined metrics
static {
AwsSdkMetrics.addAll(Arrays.asList(com.amazonaws.services.dynamodbv2.metrics.DynamoDBRequestMetric.values()));
}
/** Provider for AWS credentials. */
private final AWSCredentialsProvider awsCredentialsProvider;
private static final Log log = LogFactory.getLog(AmazonDynamoDB.class);
/** Default signing name for the service. */
private static final String DEFAULT_SIGNING_NAME = "dynamodb";
private volatile AmazonDynamoDBWaiters waiters;
/** Client configuration factory providing ClientConfigurations tailored to this client */
protected static final com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientConfigurationFactory configFactory = new com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientConfigurationFactory();
private final com.amazonaws.protocol.json.SdkJsonProtocolFactory protocolFactory = new com.amazonaws.protocol.json.SdkJsonProtocolFactory(
new JsonClientMetadata()
.withProtocolVersion("1.0")
.withSupportsCbor(false)
.withSupportsIon(false)
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("ItemCollectionSizeLimitExceededException").withModeledClass(
com.amazonaws.services.dynamodbv2.model.ItemCollectionSizeLimitExceededException.class))
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("ResourceInUseException").withModeledClass(
com.amazonaws.services.dynamodbv2.model.ResourceInUseException.class))
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("ResourceNotFoundException").withModeledClass(
com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException.class))
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("ProvisionedThroughputExceededException").withModeledClass(
com.amazonaws.services.dynamodbv2.model.ProvisionedThroughputExceededException.class))
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("ConditionalCheckFailedException").withModeledClass(
com.amazonaws.services.dynamodbv2.model.ConditionalCheckFailedException.class))
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("InternalServerError").withModeledClass(
com.amazonaws.services.dynamodbv2.model.InternalServerErrorException.class))
.addErrorMetadata(
new JsonErrorShapeMetadata().withErrorCode("LimitExceededException").withModeledClass(
com.amazonaws.services.dynamodbv2.model.LimitExceededException.class))
.withBaseServiceExceptionClass(com.amazonaws.services.dynamodbv2.model.AmazonDynamoDBException.class));
/**
* Constructs a new client to invoke service methods on DynamoDB. A credentials provider chain will be used that
* searches for credentials in this order:
*
* - Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_KEY
* - Java System Properties - aws.accessKeyId and aws.secretKey
* - Instance profile credentials delivered through the Amazon EC2 metadata service
*
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @see DefaultAWSCredentialsProviderChain
*/
public AmazonDynamoDBClient() {
this(DefaultAWSCredentialsProviderChain.getInstance(), configFactory.getConfig());
}
/**
* Constructs a new client to invoke service methods on DynamoDB. A credentials provider chain will be used that
* searches for credentials in this order:
*
* - Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_KEY
* - Java System Properties - aws.accessKeyId and aws.secretKey
* - Instance profile credentials delivered through the Amazon EC2 metadata service
*
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param clientConfiguration
* The client configuration options controlling how this client connects to DynamoDB (ex: proxy settings,
* retry counts, etc.).
*
* @see DefaultAWSCredentialsProviderChain
*/
public AmazonDynamoDBClient(ClientConfiguration clientConfiguration) {
this(DefaultAWSCredentialsProviderChain.getInstance(), clientConfiguration);
}
/**
* Constructs a new client to invoke service methods on DynamoDB using the specified AWS account credentials.
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param awsCredentials
* The AWS credentials (access key ID and secret key) to use when authenticating with AWS services.
*/
public AmazonDynamoDBClient(AWSCredentials awsCredentials) {
this(awsCredentials, configFactory.getConfig());
}
/**
* Constructs a new client to invoke service methods on DynamoDB using the specified AWS account credentials and
* client configuration options.
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param awsCredentials
* The AWS credentials (access key ID and secret key) to use when authenticating with AWS services.
* @param clientConfiguration
* The client configuration options controlling how this client connects to DynamoDB (ex: proxy settings,
* retry counts, etc.).
*/
public AmazonDynamoDBClient(AWSCredentials awsCredentials, ClientConfiguration clientConfiguration) {
super(clientConfiguration);
this.awsCredentialsProvider = new StaticCredentialsProvider(awsCredentials);
init();
}
/**
* Constructs a new client to invoke service methods on DynamoDB using the specified AWS account credentials
* provider.
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param awsCredentialsProvider
* The AWS credentials provider which will provide credentials to authenticate requests with AWS services.
*/
public AmazonDynamoDBClient(AWSCredentialsProvider awsCredentialsProvider) {
this(awsCredentialsProvider, configFactory.getConfig());
}
/**
* Constructs a new client to invoke service methods on DynamoDB using the specified AWS account credentials
* provider and client configuration options.
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param awsCredentialsProvider
* The AWS credentials provider which will provide credentials to authenticate requests with AWS services.
* @param clientConfiguration
* The client configuration options controlling how this client connects to DynamoDB (ex: proxy settings,
* retry counts, etc.).
*/
public AmazonDynamoDBClient(AWSCredentialsProvider awsCredentialsProvider, ClientConfiguration clientConfiguration) {
this(awsCredentialsProvider, clientConfiguration, null);
}
/**
* Constructs a new client to invoke service methods on DynamoDB using the specified AWS account credentials
* provider, client configuration options, and request metric collector.
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param awsCredentialsProvider
* The AWS credentials provider which will provide credentials to authenticate requests with AWS services.
* @param clientConfiguration
* The client configuration options controlling how this client connects to DynamoDB (ex: proxy settings,
* retry counts, etc.).
* @param requestMetricCollector
* optional request metric collector
*/
public AmazonDynamoDBClient(AWSCredentialsProvider awsCredentialsProvider, ClientConfiguration clientConfiguration,
RequestMetricCollector requestMetricCollector) {
super(clientConfiguration, requestMetricCollector);
this.awsCredentialsProvider = awsCredentialsProvider;
init();
}
/**
* Constructs a new client to invoke service methods on DynamoDB using the specified parameters.
*
*
* All service calls made using this new client object are blocking, and will not return until the service call
* completes.
*
* @param clientParams
* Object providing client parameters.
*/
AmazonDynamoDBClient(AwsSyncClientParams clientParams) {
super(clientParams);
this.awsCredentialsProvider = clientParams.getCredentialsProvider();
init();
}
private void init() {
setServiceNameIntern(DEFAULT_SIGNING_NAME);
setEndpointPrefix(ENDPOINT_PREFIX);
// calling this.setEndPoint(...) will also modify the signer accordingly
setEndpoint("https://dynamodb.us-east-1.amazonaws.com");
HandlerChainFactory chainFactory = new HandlerChainFactory();
requestHandler2s.addAll(chainFactory.newRequestHandlerChain("/com/amazonaws/services/dynamodbv2/request.handlers"));
requestHandler2s.addAll(chainFactory.newRequestHandler2Chain("/com/amazonaws/services/dynamodbv2/request.handler2s"));
requestHandler2s.addAll(chainFactory.getGlobalHandlers());
}
/**
*
* The BatchGetItem operation returns the attributes of one or more items from one or more tables. You
* identify requested items by primary key.
*
*
* A single operation can retrieve up to 16 MB of data, which can contain as many as 100 items. BatchGetItem
* will return a partial result if the response size limit is exceeded, the table's provisioned throughput is
* exceeded, or an internal processing failure occurs. If a partial result is returned, the operation returns a
* value for UnprocessedKeys. You can use this value to retry the operation starting with the next item to
* get.
*
*
*
* If you request more than 100 items BatchGetItem will return a ValidationException with the message
* "Too many items requested for the BatchGetItem call".
*
*
*
* For example, if you ask to retrieve 100 items, but each individual item is 300 KB in size, the system returns 52
* items (so as not to exceed the 16 MB limit). It also returns an appropriate UnprocessedKeys value so you
* can get the next page of results. If desired, your application can include its own logic to assemble the pages of
* results into one data set.
*
*
* If none of the items can be processed due to insufficient provisioned throughput on all of the tables in
* the request, then BatchGetItem will return a ProvisionedThroughputExceededException. If at least
* one of the items is successfully processed, then BatchGetItem completes successfully, while returning
* the keys of the unread items in UnprocessedKeys.
*
*
*
* If DynamoDB returns any unprocessed items, you should retry the batch operation on those items. However, we
* strongly recommend that you use an exponential backoff algorithm. If you retry the batch operation
* immediately, the underlying read or write requests can still fail due to throttling on the individual tables. If
* you delay the batch operation using exponential backoff, the individual requests in the batch are much more
* likely to succeed.
*
*
* For more information, see Batch
* Operations and Error Handling in the Amazon DynamoDB Developer Guide.
*
*
*
* By default, BatchGetItem performs eventually consistent reads on every table in the request. If you want
* strongly consistent reads instead, you can set ConsistentRead to true for any or all tables.
*
*
* In order to minimize response latency, BatchGetItem retrieves items in parallel.
*
*
* When designing your application, keep in mind that DynamoDB does not return items in any particular order. To
* help parse the response by item, include the primary key values for the items in your request in the
* AttributesToGet parameter.
*
*
* If a requested item does not exist, it is not returned in the result. Requests for nonexistent items consume the
* minimum read capacity units according to the type of read. For more information, see Capacity Units Calculations in the Amazon DynamoDB Developer Guide.
*
*
* @param batchGetItemRequest
* Represents the input of a BatchGetItem operation.
* @return Result of the BatchGetItem operation returned by the service.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.BatchGetItem
*/
@Override
public BatchGetItemResult batchGetItem(BatchGetItemRequest batchGetItemRequest) {
ExecutionContext executionContext = createExecutionContext(batchGetItemRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new BatchGetItemRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(batchGetItemRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new BatchGetItemResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public BatchGetItemResult batchGetItem(java.util.Map requestItems, String returnConsumedCapacity) {
return batchGetItem(new BatchGetItemRequest().withRequestItems(requestItems).withReturnConsumedCapacity(returnConsumedCapacity));
}
@Override
public BatchGetItemResult batchGetItem(java.util.Map requestItems) {
return batchGetItem(new BatchGetItemRequest().withRequestItems(requestItems));
}
/**
*
* The BatchWriteItem operation puts or deletes multiple items in one or more tables. A single call to
* BatchWriteItem can write up to 16 MB of data, which can comprise as many as 25 put or delete requests.
* Individual items to be written can be as large as 400 KB.
*
*
*
* BatchWriteItem cannot update items. To update items, use the UpdateItem API.
*
*
*
* The individual PutItem and DeleteItem operations specified in BatchWriteItem are atomic;
* however BatchWriteItem as a whole is not. If any requested operations fail because the table's provisioned
* throughput is exceeded or an internal processing failure occurs, the failed operations are returned in the
* UnprocessedItems response parameter. You can investigate and optionally resend the requests. Typically,
* you would call BatchWriteItem in a loop. Each iteration would check for unprocessed items and submit a new
* BatchWriteItem request with those unprocessed items until all items have been processed.
*
*
* Note that if none of the items can be processed due to insufficient provisioned throughput on all of the
* tables in the request, then BatchWriteItem will return a ProvisionedThroughputExceededException.
*
*
*
* If DynamoDB returns any unprocessed items, you should retry the batch operation on those items. However, we
* strongly recommend that you use an exponential backoff algorithm. If you retry the batch operation
* immediately, the underlying read or write requests can still fail due to throttling on the individual tables. If
* you delay the batch operation using exponential backoff, the individual requests in the batch are much more
* likely to succeed.
*
*
* For more information, see Batch
* Operations and Error Handling in the Amazon DynamoDB Developer Guide.
*
*
*
* With BatchWriteItem, you can efficiently write or delete large amounts of data, such as from Amazon
* Elastic MapReduce (EMR), or copy data from another database into DynamoDB. In order to improve performance with
* these large-scale operations, BatchWriteItem does not behave in the same way as individual PutItem
* and DeleteItem calls would. For example, you cannot specify conditions on individual put and delete
* requests, and BatchWriteItem does not return deleted items in the response.
*
*
* If you use a programming language that supports concurrency, you can use threads to write items in parallel. Your
* application must include the necessary logic to manage the threads. With languages that don't support threading,
* you must update or delete the specified items one at a time. In both situations, BatchWriteItem provides
* an alternative where the API performs the specified put and delete operations in parallel, giving you the power
* of the thread pool approach without having to introduce complexity into your application.
*
*
* Parallel processing reduces latency, but each specified put and delete request consumes the same number of write
* capacity units whether it is processed in parallel or not. Delete operations on nonexistent items consume one
* write capacity unit.
*
*
* If one or more of the following is true, DynamoDB rejects the entire batch write operation:
*
*
* -
*
* One or more tables specified in the BatchWriteItem request does not exist.
*
*
* -
*
* Primary key attributes specified on an item in the request do not match those in the corresponding table's
* primary key schema.
*
*
* -
*
* You try to perform multiple operations on the same item in the same BatchWriteItem request. For example,
* you cannot put and delete the same item in the same BatchWriteItem request.
*
*
* -
*
* There are more than 25 requests in the batch.
*
*
* -
*
* Any individual item in a batch exceeds 400 KB.
*
*
* -
*
* The total request size exceeds 16 MB.
*
*
*
*
* @param batchWriteItemRequest
* Represents the input of a BatchWriteItem operation.
* @return Result of the BatchWriteItem operation returned by the service.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws ItemCollectionSizeLimitExceededException
* An item collection is too large. This exception is only returned for tables that have one or more local
* secondary indexes.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.BatchWriteItem
*/
@Override
public BatchWriteItemResult batchWriteItem(BatchWriteItemRequest batchWriteItemRequest) {
ExecutionContext executionContext = createExecutionContext(batchWriteItemRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new BatchWriteItemRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(batchWriteItemRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new BatchWriteItemResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public BatchWriteItemResult batchWriteItem(java.util.Map> requestItems) {
return batchWriteItem(new BatchWriteItemRequest().withRequestItems(requestItems));
}
/**
*
* The CreateTable operation adds a new table to your account. In an AWS account, table names must be unique
* within each region. That is, you can have two tables with same name if you create the tables in different
* regions.
*
*
* CreateTable is an asynchronous operation. Upon receiving a CreateTable request, DynamoDB
* immediately returns a response with a TableStatus of CREATING. After the table is created,
* DynamoDB sets the TableStatus to ACTIVE. You can perform read and write operations only on an
* ACTIVE table.
*
*
* You can optionally define secondary indexes on the new table, as part of the CreateTable operation. If you
* want to create multiple tables with secondary indexes on them, you must create the tables sequentially. Only one
* table with secondary indexes can be in the CREATING state at any given time.
*
*
* You can use the DescribeTable API to check the table status.
*
*
* @param createTableRequest
* Represents the input of a CreateTable operation.
* @return Result of the CreateTable operation returned by the service.
* @throws ResourceInUseException
* The operation conflicts with the resource's availability. For example, you attempted to recreate an
* existing table, or tried to delete a table currently in the CREATING state.
* @throws LimitExceededException
* The number of concurrent table requests (cumulative number of tables in the CREATING,
* DELETING or UPDATING state) exceeds the maximum allowed of 10.
*
* Also, for tables with secondary indexes, only one of those tables can be in the CREATING
* state at any point in time. Do not attempt to create more than one such table simultaneously.
*
*
* The total limit of tables in the ACTIVE state is 250.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.CreateTable
*/
@Override
public CreateTableResult createTable(CreateTableRequest createTableRequest) {
ExecutionContext executionContext = createExecutionContext(createTableRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new CreateTableRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(createTableRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new CreateTableResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public CreateTableResult createTable(java.util.List attributeDefinitions, String tableName,
java.util.List keySchema, ProvisionedThroughput provisionedThroughput) {
return createTable(new CreateTableRequest().withAttributeDefinitions(attributeDefinitions).withTableName(tableName).withKeySchema(keySchema)
.withProvisionedThroughput(provisionedThroughput));
}
/**
*
* Deletes a single item in a table by primary key. You can perform a conditional delete operation that deletes the
* item if it exists, or if it has an expected attribute value.
*
*
* In addition to deleting an item, you can also return the item's attribute values in the same operation, using the
* ReturnValues parameter.
*
*
* Unless you specify conditions, the DeleteItem is an idempotent operation; running it multiple times on the
* same item or attribute does not result in an error response.
*
*
* Conditional deletes are useful for deleting items only if specific conditions are met. If those conditions are
* met, DynamoDB performs the delete. Otherwise, the item is not deleted.
*
*
* @param deleteItemRequest
* Represents the input of a DeleteItem operation.
* @return Result of the DeleteItem operation returned by the service.
* @throws ConditionalCheckFailedException
* A condition specified in the operation could not be evaluated.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws ItemCollectionSizeLimitExceededException
* An item collection is too large. This exception is only returned for tables that have one or more local
* secondary indexes.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.DeleteItem
*/
@Override
public DeleteItemResult deleteItem(DeleteItemRequest deleteItemRequest) {
ExecutionContext executionContext = createExecutionContext(deleteItemRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new DeleteItemRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(deleteItemRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new DeleteItemResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public DeleteItemResult deleteItem(String tableName, java.util.Map key) {
return deleteItem(new DeleteItemRequest().withTableName(tableName).withKey(key));
}
@Override
public DeleteItemResult deleteItem(String tableName, java.util.Map key, String returnValues) {
return deleteItem(new DeleteItemRequest().withTableName(tableName).withKey(key).withReturnValues(returnValues));
}
/**
*
* The DeleteTable operation deletes a table and all of its items. After a DeleteTable request, the
* specified table is in the DELETING state until DynamoDB completes the deletion. If the table is in
* the ACTIVE state, you can delete it. If a table is in CREATING or UPDATING
* states, then DynamoDB returns a ResourceInUseException. If the specified table does not exist, DynamoDB
* returns a ResourceNotFoundException. If table is already in the DELETING state, no error is
* returned.
*
*
*
* DynamoDB might continue to accept data read and write operations, such as GetItem and PutItem, on a
* table in the DELETING state until the table deletion is complete.
*
*
*
* When you delete a table, any indexes on that table are also deleted.
*
*
* If you have DynamoDB Streams enabled on the table, then the corresponding stream on that table goes into the
* DISABLED state, and the stream is automatically deleted after 24 hours.
*
*
* Use the DescribeTable API to check the status of the table.
*
*
* @param deleteTableRequest
* Represents the input of a DeleteTable operation.
* @return Result of the DeleteTable operation returned by the service.
* @throws ResourceInUseException
* The operation conflicts with the resource's availability. For example, you attempted to recreate an
* existing table, or tried to delete a table currently in the CREATING state.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws LimitExceededException
* The number of concurrent table requests (cumulative number of tables in the CREATING,
* DELETING or UPDATING state) exceeds the maximum allowed of 10.
*
* Also, for tables with secondary indexes, only one of those tables can be in the CREATING
* state at any point in time. Do not attempt to create more than one such table simultaneously.
*
*
* The total limit of tables in the ACTIVE state is 250.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.DeleteTable
*/
@Override
public DeleteTableResult deleteTable(DeleteTableRequest deleteTableRequest) {
ExecutionContext executionContext = createExecutionContext(deleteTableRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new DeleteTableRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(deleteTableRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new DeleteTableResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public DeleteTableResult deleteTable(String tableName) {
return deleteTable(new DeleteTableRequest().withTableName(tableName));
}
/**
*
* Returns the current provisioned-capacity limits for your AWS account in a region, both for the region as a whole
* and for any one DynamoDB table that you create there.
*
*
* When you establish an AWS account, the account has initial limits on the maximum read capacity units and write
* capacity units that you can provision across all of your DynamoDB tables in a given region. Also, there are
* per-table limits that apply when you create a table there. For more information, see Limits page in the
* Amazon DynamoDB Developer Guide.
*
*
* Although you can increase these limits by filing a case at AWS Support Center, obtaining the increase is not
* instantaneous. The DescribeLimits API lets you write code to compare the capacity you are currently using
* to those limits imposed by your account so that you have enough time to apply for an increase before you hit a
* limit.
*
*
* For example, you could use one of the AWS SDKs to do the following:
*
*
* -
*
* Call DescribeLimits for a particular region to obtain your current account limits on provisioned capacity
* there.
*
*
* -
*
* Create a variable to hold the aggregate read capacity units provisioned for all your tables in that region, and
* one to hold the aggregate write capacity units. Zero them both.
*
*
* -
*
* Call ListTables to obtain a list of all your DynamoDB tables.
*
*
* -
*
* For each table name listed by ListTables, do the following:
*
*
* -
*
* Call DescribeTable with the table name.
*
*
* -
*
* Use the data returned by DescribeTable to add the read capacity units and write capacity units provisioned
* for the table itself to your variables.
*
*
* -
*
* If the table has one or more global secondary indexes (GSIs), loop over these GSIs and add their provisioned
* capacity values to your variables as well.
*
*
*
*
* -
*
* Report the account limits for that region returned by DescribeLimits, along with the total current
* provisioned capacity levels you have calculated.
*
*
*
*
* This will let you see whether you are getting close to your account-level limits.
*
*
* The per-table limits apply only when you are creating a new table. They restrict the sum of the provisioned
* capacity of the new table itself and all its global secondary indexes.
*
*
* For existing tables and their GSIs, DynamoDB will not let you increase provisioned capacity extremely rapidly,
* but the only upper limit that applies is that the aggregate provisioned capacity over all your tables and GSIs
* cannot exceed either of the per-account limits.
*
*
*
* DescribeLimits should only be called periodically. You can expect throttling errors if you call it more
* than once in a minute.
*
*
*
* The DescribeLimits Request element has no content.
*
*
* @param describeLimitsRequest
* Represents the input of a DescribeLimits operation. Has no content.
* @return Result of the DescribeLimits operation returned by the service.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.DescribeLimits
*/
@Override
public DescribeLimitsResult describeLimits(DescribeLimitsRequest describeLimitsRequest) {
ExecutionContext executionContext = createExecutionContext(describeLimitsRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new DescribeLimitsRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(describeLimitsRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new DescribeLimitsResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
/**
*
* Returns information about the table, including the current status of the table, when it was created, the primary
* key schema, and any indexes on the table.
*
*
*
* If you issue a DescribeTable request immediately after a CreateTable request, DynamoDB might return
* a ResourceNotFoundException. This is because DescribeTable uses an eventually consistent query, and
* the metadata for your table might not be available at that moment. Wait for a few seconds, and then try the
* DescribeTable request again.
*
*
*
* @param describeTableRequest
* Represents the input of a DescribeTable operation.
* @return Result of the DescribeTable operation returned by the service.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.DescribeTable
*/
@Override
public DescribeTableResult describeTable(DescribeTableRequest describeTableRequest) {
ExecutionContext executionContext = createExecutionContext(describeTableRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new DescribeTableRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(describeTableRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new DescribeTableResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public DescribeTableResult describeTable(String tableName) {
return describeTable(new DescribeTableRequest().withTableName(tableName));
}
/**
*
* The GetItem operation returns a set of attributes for the item with the given primary key. If there is no
* matching item, GetItem does not return any data.
*
*
* GetItem provides an eventually consistent read by default. If your application requires a strongly
* consistent read, set ConsistentRead to true. Although a strongly consistent read might take
* more time than an eventually consistent read, it always returns the last updated value.
*
*
* @param getItemRequest
* Represents the input of a GetItem operation.
* @return Result of the GetItem operation returned by the service.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.GetItem
*/
@Override
public GetItemResult getItem(GetItemRequest getItemRequest) {
ExecutionContext executionContext = createExecutionContext(getItemRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new GetItemRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(getItemRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new GetItemResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public GetItemResult getItem(String tableName, java.util.Map key) {
return getItem(new GetItemRequest().withTableName(tableName).withKey(key));
}
@Override
public GetItemResult getItem(String tableName, java.util.Map key, Boolean consistentRead) {
return getItem(new GetItemRequest().withTableName(tableName).withKey(key).withConsistentRead(consistentRead));
}
/**
*
* Returns an array of table names associated with the current account and endpoint. The output from
* ListTables is paginated, with each page returning a maximum of 100 table names.
*
*
* @param listTablesRequest
* Represents the input of a ListTables operation.
* @return Result of the ListTables operation returned by the service.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.ListTables
*/
@Override
public ListTablesResult listTables(ListTablesRequest listTablesRequest) {
ExecutionContext executionContext = createExecutionContext(listTablesRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new ListTablesRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(listTablesRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new ListTablesResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public ListTablesResult listTables() {
return listTables(new ListTablesRequest());
}
@Override
public ListTablesResult listTables(String exclusiveStartTableName) {
return listTables(new ListTablesRequest().withExclusiveStartTableName(exclusiveStartTableName));
}
@Override
public ListTablesResult listTables(String exclusiveStartTableName, Integer limit) {
return listTables(new ListTablesRequest().withExclusiveStartTableName(exclusiveStartTableName).withLimit(limit));
}
@Override
public ListTablesResult listTables(Integer limit) {
return listTables(new ListTablesRequest().withLimit(limit));
}
/**
*
* Creates a new item, or replaces an old item with a new item. If an item that has the same primary key as the new
* item already exists in the specified table, the new item completely replaces the existing item. You can perform a
* conditional put operation (add a new item if one with the specified primary key doesn't exist), or replace an
* existing item if it has certain attribute values.
*
*
* In addition to putting an item, you can also return the item's attribute values in the same operation, using the
* ReturnValues parameter.
*
*
* When you add an item, the primary key attribute(s) are the only required attributes. Attribute values cannot be
* null. String and Binary type attributes must have lengths greater than zero. Set type attributes cannot be empty.
* Requests with empty values will be rejected with a ValidationException exception.
*
*
* You can request that PutItem return either a copy of the original item (before the update) or a copy of
* the updated item (after the update). For more information, see the ReturnValues description below.
*
*
*
* To prevent a new item from replacing an existing item, use a conditional expression that contains the
* attribute_not_exists function with the name of the attribute being used as the partition key for the
* table. Since every record must contain that attribute, the attribute_not_exists function will only
* succeed if no matching item exists.
*
*
*
* For more information about using this API, see Working with
* Items in the Amazon DynamoDB Developer Guide.
*
*
* @param putItemRequest
* Represents the input of a PutItem operation.
* @return Result of the PutItem operation returned by the service.
* @throws ConditionalCheckFailedException
* A condition specified in the operation could not be evaluated.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws ItemCollectionSizeLimitExceededException
* An item collection is too large. This exception is only returned for tables that have one or more local
* secondary indexes.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.PutItem
*/
@Override
public PutItemResult putItem(PutItemRequest putItemRequest) {
ExecutionContext executionContext = createExecutionContext(putItemRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new PutItemRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(putItemRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new PutItemResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public PutItemResult putItem(String tableName, java.util.Map item) {
return putItem(new PutItemRequest().withTableName(tableName).withItem(item));
}
@Override
public PutItemResult putItem(String tableName, java.util.Map item, String returnValues) {
return putItem(new PutItemRequest().withTableName(tableName).withItem(item).withReturnValues(returnValues));
}
/**
*
* A Query operation uses the primary key of a table or a secondary index to directly access items from that
* table or index.
*
*
* Use the KeyConditionExpression parameter to provide a specific value for the partition key. The
* Query operation will return all of the items from the table or index with that partition key value. You
* can optionally narrow the scope of the Query operation by specifying a sort key value and a comparison
* operator in KeyConditionExpression. You can use the ScanIndexForward parameter to get results in
* forward or reverse order, by sort key.
*
*
* Queries that do not return results consume the minimum number of read capacity units for that type of read
* operation.
*
*
* If the total number of items meeting the query criteria exceeds the result set size limit of 1 MB, the query
* stops and results are returned to the user with the LastEvaluatedKey element to continue the query in a
* subsequent operation. Unlike a Scan operation, a Query operation never returns both an empty result
* set and a LastEvaluatedKey value. LastEvaluatedKey is only provided if you have used the
* Limit parameter, or if the result set exceeds 1 MB (prior to applying a filter).
*
*
* You can query a table, a local secondary index, or a global secondary index. For a query on a table or on a local
* secondary index, you can set the ConsistentRead parameter to true and obtain a strongly
* consistent result. Global secondary indexes support eventually consistent reads only, so do not specify
* ConsistentRead when querying a global secondary index.
*
*
* @param queryRequest
* Represents the input of a Query operation.
* @return Result of the Query operation returned by the service.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.Query
*/
@Override
public QueryResult query(QueryRequest queryRequest) {
ExecutionContext executionContext = createExecutionContext(queryRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new QueryRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(queryRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new QueryResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
/**
*
* The Scan operation returns one or more items and item attributes by accessing every item in a table or a
* secondary index. To have DynamoDB return fewer items, you can provide a ScanFilter operation.
*
*
* If the total number of scanned items exceeds the maximum data set size limit of 1 MB, the scan stops and results
* are returned to the user as a LastEvaluatedKey value to continue the scan in a subsequent operation. The
* results also include the number of items exceeding the limit. A scan can result in no table data meeting the
* filter criteria.
*
*
* By default, Scan operations proceed sequentially; however, for faster performance on a large table or
* secondary index, applications can request a parallel Scan operation by providing the Segment and
* TotalSegments parameters. For more information, see Parallel Scan in the Amazon DynamoDB Developer Guide.
*
*
* By default, Scan uses eventually consistent reads when accessing the data in a table; therefore, the
* result set might not include the changes to data in the table immediately before the operation began. If you need
* a consistent copy of the data, as of the time that the Scan begins, you can set the ConsistentRead
* parameter to true.
*
*
* @param scanRequest
* Represents the input of a Scan operation.
* @return Result of the Scan operation returned by the service.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.Scan
*/
@Override
public ScanResult scan(ScanRequest scanRequest) {
ExecutionContext executionContext = createExecutionContext(scanRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new ScanRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(scanRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new ScanResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public ScanResult scan(String tableName, java.util.List attributesToGet) {
return scan(new ScanRequest().withTableName(tableName).withAttributesToGet(attributesToGet));
}
@Override
public ScanResult scan(String tableName, java.util.Map scanFilter) {
return scan(new ScanRequest().withTableName(tableName).withScanFilter(scanFilter));
}
@Override
public ScanResult scan(String tableName, java.util.List attributesToGet, java.util.Map scanFilter) {
return scan(new ScanRequest().withTableName(tableName).withAttributesToGet(attributesToGet).withScanFilter(scanFilter));
}
/**
*
* Edits an existing item's attributes, or adds a new item to the table if it does not already exist. You can put,
* delete, or add attribute values. You can also perform a conditional update on an existing item (insert a new
* attribute name-value pair if it doesn't exist, or replace an existing name-value pair if it has certain expected
* attribute values).
*
*
* You can also return the item's attribute values in the same UpdateItem operation using the
* ReturnValues parameter.
*
*
* @param updateItemRequest
* Represents the input of an UpdateItem operation.
* @return Result of the UpdateItem operation returned by the service.
* @throws ConditionalCheckFailedException
* A condition specified in the operation could not be evaluated.
* @throws ProvisionedThroughputExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
* exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
* the frequency of requests and use exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws ItemCollectionSizeLimitExceededException
* An item collection is too large. This exception is only returned for tables that have one or more local
* secondary indexes.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.UpdateItem
*/
@Override
public UpdateItemResult updateItem(UpdateItemRequest updateItemRequest) {
ExecutionContext executionContext = createExecutionContext(updateItemRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new UpdateItemRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(updateItemRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(new JsonOperationMetadata()
.withPayloadJson(true).withHasStreamingSuccessResponse(false), new UpdateItemResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public UpdateItemResult updateItem(String tableName, java.util.Map key, java.util.Map attributeUpdates) {
return updateItem(new UpdateItemRequest().withTableName(tableName).withKey(key).withAttributeUpdates(attributeUpdates));
}
@Override
public UpdateItemResult updateItem(String tableName, java.util.Map key,
java.util.Map attributeUpdates, String returnValues) {
return updateItem(new UpdateItemRequest().withTableName(tableName).withKey(key).withAttributeUpdates(attributeUpdates).withReturnValues(returnValues));
}
/**
*
* Modifies the provisioned throughput settings, global secondary indexes, or DynamoDB Streams settings for a given
* table.
*
*
* You can only perform one of the following operations at once:
*
*
* -
*
* Modify the provisioned throughput settings of the table.
*
*
* -
*
* Enable or disable Streams on the table.
*
*
* -
*
* Remove a global secondary index from the table.
*
*
* -
*
* Create a new global secondary index on the table. Once the index begins backfilling, you can use
* UpdateTable to perform other operations.
*
*
*
*
* UpdateTable is an asynchronous operation; while it is executing, the table status changes from
* ACTIVE to UPDATING. While it is UPDATING, you cannot issue another
* UpdateTable request. When the table returns to the ACTIVE state, the UpdateTable
* operation is complete.
*
*
* @param updateTableRequest
* Represents the input of an UpdateTable operation.
* @return Result of the UpdateTable operation returned by the service.
* @throws ResourceInUseException
* The operation conflicts with the resource's availability. For example, you attempted to recreate an
* existing table, or tried to delete a table currently in the CREATING state.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent table or index. The resource might not be specified
* correctly, or its status might not be ACTIVE.
* @throws LimitExceededException
* The number of concurrent table requests (cumulative number of tables in the CREATING,
* DELETING or UPDATING state) exceeds the maximum allowed of 10.
*
* Also, for tables with secondary indexes, only one of those tables can be in the CREATING
* state at any point in time. Do not attempt to create more than one such table simultaneously.
*
*
* The total limit of tables in the ACTIVE state is 250.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDB.UpdateTable
*/
@Override
public UpdateTableResult updateTable(UpdateTableRequest updateTableRequest) {
ExecutionContext executionContext = createExecutionContext(updateTableRequest);
AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
awsRequestMetrics.startEvent(Field.ClientExecuteTime);
Request request = null;
Response response = null;
try {
awsRequestMetrics.startEvent(Field.RequestMarshallTime);
try {
request = new UpdateTableRequestMarshaller(protocolFactory).marshall(super.beforeMarshalling(updateTableRequest));
// Binds the request metrics to the current request.
request.setAWSRequestMetrics(awsRequestMetrics);
} finally {
awsRequestMetrics.endEvent(Field.RequestMarshallTime);
}
HttpResponseHandler> responseHandler = protocolFactory.createResponseHandler(
new JsonOperationMetadata().withPayloadJson(true).withHasStreamingSuccessResponse(false), new UpdateTableResultJsonUnmarshaller());
response = invoke(request, responseHandler, executionContext);
return response.getAwsResponse();
} finally {
endClientExecution(awsRequestMetrics, request, response);
}
}
@Override
public UpdateTableResult updateTable(String tableName, ProvisionedThroughput provisionedThroughput) {
return updateTable(new UpdateTableRequest().withTableName(tableName).withProvisionedThroughput(provisionedThroughput));
}
/**
* Returns additional metadata for a previously executed successful, request, typically used for debugging issues
* where a service isn't acting as expected. This data isn't considered part of the result data returned by an
* operation, so it's available through this separate, diagnostic interface.
*
* Response metadata is only cached for a limited period of time, so if you need to access this extra diagnostic
* information for an executed request, you should use this method to retrieve it as soon as possible after
* executing the request.
*
* @param request
* The originally executed request
*
* @return The response metadata for the specified request, or null if none is available.
*/
public ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request) {
return client.getResponseMetadataForRequest(request);
}
@Override
protected final boolean calculateCRC32FromCompressedData() {
return true;
}
/**
* Normal invoke with authentication. Credentials are required and may be overriden at the request level.
**/
private Response invoke(Request request, HttpResponseHandler> responseHandler,
ExecutionContext executionContext) {
executionContext.setCredentialsProvider(CredentialUtils.getCredentialsProvider(request.getOriginalRequest(), awsCredentialsProvider));
return doInvoke(request, responseHandler, executionContext);
}
/**
* Invoke with no authentication. Credentials are not required and any credentials set on the client or request will
* be ignored for this operation.
**/
private Response anonymousInvoke(Request request,
HttpResponseHandler> responseHandler, ExecutionContext executionContext) {
return doInvoke(request, responseHandler, executionContext);
}
/**
* Invoke the request using the http client. Assumes credentials (or lack thereof) have been configured in the
* ExecutionContext beforehand.
**/
private Response doInvoke(Request request, HttpResponseHandler> responseHandler,
ExecutionContext executionContext) {
request.setEndpoint(endpoint);
request.setTimeOffset(timeOffset);
HttpResponseHandler errorResponseHandler = protocolFactory.createErrorResponseHandler(new JsonErrorResponseMetadata());
return client.execute(request, responseHandler, errorResponseHandler, executionContext);
}
@Override
public AmazonDynamoDBWaiters waiters() {
if (waiters == null) {
synchronized (this) {
if (waiters == null) {
waiters = new AmazonDynamoDBWaiters(this);
}
}
}
return waiters;
}
}