/* * Copyright 2014-2015 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.codesamples.gsg; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient; import com.amazonaws.services.dynamodbv2.document.DynamoDB; import com.amazonaws.services.dynamodbv2.document.Table; import com.amazonaws.services.dynamodbv2.document.spec.UpdateItemSpec; import com.amazonaws.services.dynamodbv2.document.utils.ValueMap; public class MoviesItemOps04 { public static void main(String[] args) { AmazonDynamoDBClient client = new AmazonDynamoDBClient(); client.setEndpoint("http://localhost:8000"); DynamoDB dynamoDB = new DynamoDB(client); Table table = dynamoDB.getTable("Movies"); int year = 2015; String title = "The Big New Movie"; UpdateItemSpec updateItemSpec = new UpdateItemSpec() .withPrimaryKey("year", year, "title", title) .withUpdateExpression("set info.rating = info.rating + :val") .withValueMap(new ValueMap() .withNumber(":val", 1)); System.out.println("Incrementing an atomic counter..."); try { table.updateItem(updateItemSpec); System.out.println("UpdateItem succeeded: " + table.getItem("year", year, "title", title).toJSONPretty()); } catch (Exception e) { System.out.println("UpdateItem failed"); e.printStackTrace(); } } }