org.chenchun.twill.TwillMultiTask.java Source code

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Here is the source code for org.chenchun.twill.TwillMultiTask.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.chenchun.twill;

import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.twill.api.AbstractTwillRunnable;
import org.apache.twill.api.ResourceSpecification;
import org.apache.twill.api.TwillApplication;
import org.apache.twill.api.TwillController;
import org.apache.twill.api.TwillRunnerService;
import org.apache.twill.api.TwillSpecification;
import org.apache.twill.api.logging.PrinterLogHandler;
import org.apache.twill.common.Services;
import org.apache.twill.yarn.YarnTwillRunnerService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.PrintWriter;
import java.util.concurrent.ExecutionException;

/**
 *
 */
public class TwillMultiTask implements TwillApplication {

    public static final Logger LOG = LoggerFactory.getLogger(TwillMultiTask.class);

    @Override
    public TwillSpecification configure() {
        return TwillSpecification.Builder.with().setName(TwillMultiTask.class.getSimpleName()).withRunnable()
                .add(RunFor1Sec.class.getSimpleName(), new RunFor1Sec(),
                        ResourceSpecification.Builder.with().setVirtualCores(1)
                                .setMemory(128, ResourceSpecification.SizeUnit.MEGA).setInstances(3).build())
                .noLocalFiles().add(RunForever.class.getSimpleName(), new RunForever()).noLocalFiles().anyOrder()
                .build();
    }

    public class RunFor1Sec extends AbstractTwillRunnable {

        @Override
        public void run() {
            LOG.info("Start run " + RunFor1Sec.class.getSimpleName());
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            LOG.info("Stop run " + RunFor1Sec.class.getSimpleName());
        }
    }

    public class RunForever extends AbstractTwillRunnable {

        @Override
        public void run() {
            LOG.info("Start run " + RunForever.class.getSimpleName());
            while (true) {
                LOG.info("I will never stop");
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static void main(String[] args) throws ExecutionException, InterruptedException {

        String zkStr = "localhost:2181";
        final TwillRunnerService twillRunner = new YarnTwillRunnerService(new YarnConfiguration(), zkStr);
        twillRunner.startAndWait();

        final TwillController controller = twillRunner.prepare(new TwillMultiTask())
                .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true))).start();

        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
            @Override
            public void run() {
                controller.stopAndWait();
                twillRunner.stopAndWait();
            }
        }));

        Services.getCompletionFuture(controller).get();
    }
}