org.springframework.yarn.am.CommandLineAppmasterRunner.java Source code

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Here is the source code for org.springframework.yarn.am.CommandLineAppmasterRunner.java

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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 org.springframework.yarn.am;

import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.CountDownLatch;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.StringUtils;
import org.springframework.yarn.YarnSystemConstants;
import org.springframework.yarn.launch.AbstractCommandLineRunner;
import org.springframework.yarn.launch.ExitStatus;
import org.springframework.yarn.listener.AppmasterStateListener;

/**
 * Simple launcher for application master.
 *
 * @author Janne Valkealahti
 *
 */
public class CommandLineAppmasterRunner extends AbstractCommandLineRunner<YarnAppmaster> {

    private static final Log log = LogFactory.getLog(CommandLineAppmasterRunner.class);

    /** Latch to wait appmaster complete state */
    private CountDownLatch latch = new CountDownLatch(1);

    @Override
    protected ExitStatus handleBeanRun(YarnAppmaster bean, String[] parameters, Set<String> opts) {
        Properties properties = StringUtils.splitArrayElementsIntoProperties(parameters, "=");
        bean.setParameters(properties != null ? properties : new Properties());
        bean.setEnvironment(System.getenv());
        if (log.isDebugEnabled()) {
            log.debug("Starting YarnAppmaster bean: " + StringUtils.arrayToCommaDelimitedString(parameters));
        }

        bean.addAppmasterStateListener(new AppmasterStateListener() {
            @Override
            public void state(AppmasterState state) {
                if (state == AppmasterState.COMPLETED) {
                    latch.countDown();
                }
            }
        });

        bean.submitApplication();

        if (log.isDebugEnabled()) {
            log.debug("Waiting latch to receive appmaster complete state");
        }
        try {
            latch.await();
        } catch (InterruptedException e) {
            log.debug("Latch interrupted");
        }
        log.info("Bean run completed");
        return ExitStatus.COMPLETED;
    }

    @Override
    protected String getDefaultBeanIdentifier() {
        return YarnSystemConstants.DEFAULT_ID_APPMASTER;
    }

    @Override
    protected List<String> getValidOpts() {
        return null;
    }

    public static void main(String[] args) {
        new CommandLineAppmasterRunner().doMain(args);
    }

}