// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

// snippet-start:[emr.java.create-cluster.emrfsconfiguration]
import java.util.HashMap;
import java.util.Map;
import com.amazonaws.AmazonClientException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.elasticmapreduce.AmazonElasticMapReduce;
import com.amazonaws.services.elasticmapreduce.AmazonElasticMapReduceClientBuilder;
import com.amazonaws.services.elasticmapreduce.model.*;

public class Main {
	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();

		Map<String, String> emrfsProperties = new HashMap<String, String>();
		emrfsProperties.put("fs.s3.cse.encryptionMaterialsProvider.uri",
				"s3://mybucket/MyCustomEncryptionMaterialsProvider.jar");
		emrfsProperties.put("fs.s3.cse.enabled", "true");
		emrfsProperties.put("fs.s3.consistent", "true");
		emrfsProperties.put("fs.s3.cse.encryptionMaterialsProvider", "full.class.name.of.EncryptionMaterialsProvider");

		Configuration myEmrfsConfig = new Configuration()
				.withClassification("emrfs-site")
				.withProperties(emrfsProperties);

		Application hive = new Application().withName("Hive");
		Application spark = new Application().withName("Spark");
		Application ganglia = new Application().withName("Ganglia");
		Application zeppelin = new Application().withName("Zeppelin");

		RunJobFlowRequest request = new RunJobFlowRequest()
				.withName("ClusterWithCustomEMRFSEncryptionMaterialsProvider")
				.withReleaseLabel("emr-5.20.0")
				.withApplications(hive, spark, ganglia, zeppelin)
				.withConfigurations(myEmrfsConfig)
				.withServiceRole("EMR_DefaultRole")
				.withJobFlowRole("EMR_EC2_DefaultRole")
				.withLogUri("s3://path/to/emr/logs")
				.withInstances(new JobFlowInstancesConfig()
						.withEc2KeyName("myEc2Key")
						.withInstanceCount(3)
						.withKeepJobFlowAliveWhenNoSteps(true)
						.withMasterInstanceType("m4.large")
						.withSlaveInstanceType("m4.large"));

		RunJobFlowResult result = emr.runJobFlow(request);
		System.out.println("The cluster ID is " + result.toString());
	}
}
// snippet-end:[emr.java.create-cluster.emrfsconfiguration]