AWS Code Sample

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You can return to the original look by selecting English in the language selector above. demonstrates how to create a Flink cluster, and then run a step that shuts down the cluster when it completes.

/** * 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. */ import java.util.ArrayList; import java.util.List; import com.amazonaws.AmazonClientException; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.AWSStaticCredentialsProvider; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import; import; import*; public class Main_test { public static void main(String[] args) { AWSCredentials credentials_profile = null; try { credentials_profile = new ProfileCredentialsProvider("default").getCredentials(); } catch (Exception e) { throw new AmazonClientException( "Cannot load credentials from .aws/credentials file. " + "Make sure that the credentials file exists and the profile name is specified within it.", e); } AmazonElasticMapReduce emr = AmazonElasticMapReduceClientBuilder.standard() .withCredentials(new AWSStaticCredentialsProvider(credentials_profile)) .withRegion(Regions.US_WEST_1) .build(); List<StepConfig> stepConfigs = new ArrayList<StepConfig>(); HadoopJarStepConfig flinkWordCountConf = new HadoopJarStepConfig() .withJar("command-runner.jar") .withArgs("bash","-c", "flink", "run", "-m", "yarn-cluster", "-yn", "2", "/usr/lib/flink/examples/streaming/WordCount.jar", "--input", "s3://path/to/input-file.txt", "--output", "s3://path/to/output/"); StepConfig flinkRunWordCountStep = new StepConfig() .withName("Flink add a wordcount step and terminate") .withActionOnFailure("CONTINUE") .withHadoopJarStep(flinkWordCountConf); stepConfigs.add(flinkRunWordCountStep); Application flink = new Application().withName("Flink"); RunJobFlowRequest request = new RunJobFlowRequest() .withName("flink-transient") .withReleaseLabel("emr-5.20.0") .withApplications(flink) .withServiceRole("EMR_DefaultRole") .withJobFlowRole("EMR_EC2_DefaultRole") .withLogUri("s3://path/to/my/logfiles") .withInstances(new JobFlowInstancesConfig() .withEc2KeyName("myEc2Key") .withEc2SubnetId("subnet-12ab3c45") .withInstanceCount(3) .withKeepJobFlowAliveWhenNoSteps(false) .withMasterInstanceType("m4.large") .withSlaveInstanceType("m4.large")) .withSteps(stepConfigs); RunJobFlowResult result = emr.runJobFlow(request); System.out.println("The cluster ID is " + result.toString()); } }

Service: elasticmapreduce

Last tested: 2019-01-31

Author: AWS

Type: full-example

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