Java tutorial
/* * Copyright 2017 liyp (liyp.yunpeng@gmail.com) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License 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 awskinesis; /* * Copyright 2012-2015 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. */ import java.net.InetAddress; import java.util.UUID; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.amazonaws.AmazonClientException; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.AWSCredentialsProvider; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient; import com.amazonaws.services.kinesis.AmazonKinesis; import com.amazonaws.services.kinesis.AmazonKinesisClient; import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorFactory; import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream; import com.amazonaws.services.kinesis.clientlibrary.lib.worker.KinesisClientLibConfiguration; import com.amazonaws.services.kinesis.clientlibrary.lib.worker.Worker; import com.amazonaws.services.kinesis.model.ResourceNotFoundException; /** * Sample Amazon Kinesis Application. */ public final class AmazonKinesisApplicationSample { private static final Log LOG = LogFactory.getLog(AmazonKinesisApplicationSample.class); /* * Before running the code: * Fill in your AWS access credentials in the provided credentials * file template, and be sure to move the file to the default location * (~/.aws/credentials) where the sample code will load the * credentials from. * https://console.aws.amazon.com/iam/home?#security_credential * * WARNING: * To avoid accidental leakage of your credentials, DO NOT keep * the credentials file in your source directory. */ public static final String SAMPLE_APPLICATION_STREAM_NAME = "myFirstStream"; private static final String SAMPLE_APPLICATION_NAME = "SampleKinesisApplication"; // Initial position in the stream when the application starts up for the first time. // Position can be one of LATEST (most recent data) or TRIM_HORIZON (oldest available data) private static final InitialPositionInStream SAMPLE_APPLICATION_INITIAL_POSITION_IN_STREAM = InitialPositionInStream.TRIM_HORIZON; private static AWSCredentialsProvider credentialsProvider; private static void init() { // Ensure the JVM will refresh the cached IP values of AWS resources (e.g. service endpoints). java.security.Security.setProperty("networkaddress.cache.ttl", "60"); /* * The ProfileCredentialsProvider will return your [default] * credential profile by reading from the credentials file located at * (~/.aws/credentials). */ credentialsProvider = new ProfileCredentialsProvider(); try { credentialsProvider.getCredentials(); } catch (Exception e) { throw new AmazonClientException("Cannot load the credentials from the credential profiles file. " + "Please make sure that your credentials file is at the correct " + "location (~/.aws/credentials), and is in valid format.", e); } } public static void main(String[] args) throws Exception { init(); if (args.length == 1 && "delete-resources".equals(args[0])) { deleteResources(); return; } String workerId = InetAddress.getLocalHost().getCanonicalHostName() + ":" + UUID.randomUUID(); KinesisClientLibConfiguration kinesisClientLibConfiguration = new KinesisClientLibConfiguration( SAMPLE_APPLICATION_NAME, SAMPLE_APPLICATION_STREAM_NAME, credentialsProvider, workerId) .withRegionName("cn-north-1"); kinesisClientLibConfiguration.withInitialPositionInStream(SAMPLE_APPLICATION_INITIAL_POSITION_IN_STREAM); IRecordProcessorFactory recordProcessorFactory = new AmazonKinesisApplicationRecordProcessorFactory(); final Worker worker = new Worker(recordProcessorFactory, kinesisClientLibConfiguration); System.out.printf("Running %s to process stream %s as worker %s...\n", SAMPLE_APPLICATION_NAME, SAMPLE_APPLICATION_STREAM_NAME, workerId); int exitCode = 0; try { worker.run(); } catch (Throwable t) { System.err.println("Caught throwable while processing data."); t.printStackTrace(); exitCode = 1; } // add a shutdown hook to stop the server Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() { @Override public void run() { LOG.info("########### shoutdown begin...."); worker.shutdown(); try { Thread.sleep(10000); } catch (InterruptedException e) { e.printStackTrace(); } LOG.info("########### shoutdown end...."); } })); System.exit(exitCode); } public static void deleteResources() { AWSCredentials credentials = credentialsProvider.getCredentials(); // Delete the stream AmazonKinesis kinesis = new AmazonKinesisClient(credentials); kinesis.setEndpoint("kinesis.cn-north-1.amazonaws.com.cn"); System.out.printf("Deleting the Amazon Kinesis stream used by the sample. Stream Name = %s.\n", SAMPLE_APPLICATION_STREAM_NAME); try { kinesis.deleteStream(SAMPLE_APPLICATION_STREAM_NAME); } catch (ResourceNotFoundException ex) { // The stream doesn't exist. } // Delete the table AmazonDynamoDBClient dynamoDB = new AmazonDynamoDBClient(credentialsProvider.getCredentials()); dynamoDB.setEndpoint("dynamodb.cn-north-1.amazonaws.com.cn"); System.out.printf( "Deleting the Amazon DynamoDB table used by the Amazon Kinesis Client Library. Table Name = %s.\n", SAMPLE_APPLICATION_NAME); try { dynamoDB.deleteTable(SAMPLE_APPLICATION_NAME); } catch (com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException ex) { // The table doesn't exist. } } }