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LowLevelBatchWriteSyntax.java

/** * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is 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/ * * 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.codesamples.lowlevel; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.amazonaws.AmazonServiceException; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.PropertiesCredentials; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient; import com.amazonaws.services.dynamodbv2.model.AttributeValue; import com.amazonaws.services.dynamodbv2.model.BatchWriteItemRequest; import com.amazonaws.services.dynamodbv2.model.DeleteRequest; import com.amazonaws.services.dynamodbv2.model.PutRequest; import com.amazonaws.services.dynamodbv2.model.WriteRequest; // ********************************************************************** // This sample gives syntax for Java Low Level Batch Write // It is not included with xi:include but is given here for references // ********************************************************************** public class LowLevelBatchWriteSyntax { static AmazonDynamoDBClient client; static SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"); public static void main(String[] args) throws IOException { createClient(); writeMultipleItemsBatchWrite(); } private static void createClient() throws IOException { AWSCredentials credentials = new PropertiesCredentials( LowLevelBatchWriteSyntax.class.getResourceAsStream("AwsCredentials.properties")); client = new AmazonDynamoDBClient(credentials); } private static void writeMultipleItemsBatchWrite() { try { // Begin syntax extract // Create a map for the requests in the batch Map<String, List<WriteRequest>> requestItems = new HashMap<String, List<WriteRequest>>(); // Create a PutRequest for a new Forum item Map<String, AttributeValue> forumItem = new HashMap<String, AttributeValue>(); forumItem.put("Name", new AttributeValue().withS("Amazon RDS")); forumItem.put("Threads", new AttributeValue().withN("0")); List<WriteRequest> forumList = new ArrayList<WriteRequest>(); forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem))); requestItems.put("Forum", forumList); // Create a PutRequest for a new Thread item Map<String, AttributeValue> threadItem = new HashMap<String, AttributeValue>(); threadItem.put("ForumName", new AttributeValue().withS("Amazon RDS")); threadItem.put("Subject", new AttributeValue().withS("Amazon RDS Thread 1")); List<WriteRequest> threadList = new ArrayList<WriteRequest>(); threadList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(threadItem))); // Create a DeleteRequest for a Thread item Map<String, AttributeValue> threadDeleteKey = new HashMap<String, AttributeValue>(); threadDeleteKey.put("ForumName", new AttributeValue().withS("Some partition key value")); threadDeleteKey.put("Subject", new AttributeValue().withS("Some sort key value")); threadList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(threadDeleteKey))); requestItems.put("Thread", threadList); BatchWriteItemRequest batchWriteItemRequest = new BatchWriteItemRequest(); System.out.println("Making the request."); batchWriteItemRequest.withRequestItems(requestItems); client.batchWriteItem(batchWriteItemRequest); // End syntax extract } catch (AmazonServiceException ase) { System.err.println("Failed to retrieve items: "); ase.printStackTrace(System.err); } } }

Sample Details

Service: dynamodb

Last tested:

Author: AWS

Type: full-example

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