AWS Code Sample

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/** * Copyright 2010-2019, 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 * * * * 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.client.builder.AwsClientBuilder; import; import; import; import; import; import; import; import; public class MoviesItemOps04 { public static void main(String[] args) throws Exception { AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard() .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration("http://localhost:8000", "us-west-2")) .build(); 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)).withReturnValues(ReturnValue.UPDATED_NEW); try { System.out.println("Incrementing an atomic counter..."); UpdateItemOutcome outcome = table.updateItem(updateItemSpec); System.out.println("UpdateItem succeeded:\n" + outcome.getItem().toJSONPretty()); } catch (Exception e) { System.err.println("Unable to update item: " + year + " " + title); System.err.println(e.getMessage()); } } }

Sample Details

Service: dynamodb

Last tested:

Author: AWS

Type: full-example

On this page: