UpdateTable.java - AWS Code Sample


UpdateTable.java demonstrates how to update an Amazon DynamoDB table.

/* Copyright 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.example.dynamodb; import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.model.ProvisionedThroughput; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.UpdateTableRequest; import software.amazon.awssdk.services.dynamodb.model.DynamoDbException; /** * Updates an Amazon DynamoDB table (changes provisioned throughput) * * This code expects that you have AWS credentials set up, as described here: * http://docs.aws.amazon.com/java-sdk/latest/developer-guide/setup-credentials.html */ public class UpdateTable { public static void main(String[] args) { final String USAGE = "\n" + "Usage:\n" + " UpdateTable <table> <read> <write>\n\n" + "Where:\n" + " table - the table to put the item in (i.e., Music3)\n" + " read - the new read capacity of the table (i.e., 16)\n" + " write - the new write capacity of the table (i.e., 10)\n\n" + "Example:\n" + " UpdateTable Music3 16 10\n"; if (args.length < 3) { System.out.println(USAGE); System.exit(1); } String tableName = args[0]; Long readCapacity = Long.parseLong(args[1]); Long writeCapacity = Long.parseLong(args[2]); // Create the DynamoDbClient object Region region = Region.US_WEST_2; DynamoDbClient ddb = DynamoDbClient.builder().region(region).build(); updateDynamoDBTable(ddb, tableName, readCapacity, writeCapacity); } public static void updateDynamoDBTable(DynamoDbClient ddb, String tableName, Long readCapacity, Long writeCapacity) { System.out.format( "Updating %s with new provisioned throughput values\n", tableName); System.out.format("Read capacity : %d\n", readCapacity); System.out.format("Write capacity : %d\n", writeCapacity); ProvisionedThroughput tableThroughput = ProvisionedThroughput.builder() .readCapacityUnits(readCapacity) .writeCapacityUnits(writeCapacity) .build(); UpdateTableRequest request = UpdateTableRequest.builder() .provisionedThroughput(tableThroughput) .tableName(tableName) .build(); try { ddb.updateTable(request); } catch (DynamoDbException e) { System.err.println(e.getMessage()); System.exit(1); } System.out.println("Done!"); } }

Sample Details

Service: Amazon DynamoDB

Last tested: 2/5/2020

Author: scmacdon-aws

Type: full-example