org.apache.gobblin.runtime.local.LocalJobLauncher.java Source code

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Here is the source code for org.apache.gobblin.runtime.local.LocalJobLauncher.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.apache.gobblin.runtime.local;

import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import com.google.common.util.concurrent.ServiceManager;

import lombok.extern.slf4j.Slf4j;

import org.apache.gobblin.broker.gobblin_scopes.GobblinScopeTypes;
import org.apache.gobblin.broker.iface.SharedResourcesBroker;
import org.apache.gobblin.metrics.Tag;
import org.apache.gobblin.metrics.event.TimingEvent;
import org.apache.gobblin.runtime.AbstractJobLauncher;
import org.apache.gobblin.runtime.GobblinMultiTaskAttempt;
import org.apache.gobblin.runtime.JobState;
import org.apache.gobblin.runtime.TaskExecutor;
import org.apache.gobblin.runtime.TaskStateTracker;
import org.apache.gobblin.runtime.api.Configurable;
import org.apache.gobblin.runtime.api.JobSpec;
import org.apache.gobblin.source.workunit.WorkUnit;
import org.apache.gobblin.util.JobConfigurationUtils;
import org.apache.gobblin.runtime.util.MultiWorkUnitUnpackingIterator;
import org.apache.gobblin.source.workunit.WorkUnitStream;

/**
 * An implementation of {@link org.apache.gobblin.runtime.JobLauncher} for launching and running jobs
 * locally on a single node.
 *
 * @author Yinan Li
 */
@Slf4j
public class LocalJobLauncher extends AbstractJobLauncher {

    private static final Logger LOG = LoggerFactory.getLogger(LocalJobLauncher.class);

    private final TaskExecutor taskExecutor;

    private final TaskStateTracker taskStateTracker;

    // Service manager to manage dependent services
    private final ServiceManager serviceManager;

    public LocalJobLauncher(Properties jobProps) throws Exception {
        this(jobProps, null);
    }

    public LocalJobLauncher(Properties jobProps, SharedResourcesBroker<GobblinScopeTypes> instanceBroker)
            throws Exception {
        super(jobProps, ImmutableList.<Tag<?>>of(), instanceBroker);
        log.debug("Local job launched with properties: {}", jobProps);

        TimingEvent jobLocalSetupTimer = this.eventSubmitter
                .getTimingEvent(TimingEvent.RunJobTimings.JOB_LOCAL_SETUP);

        this.taskExecutor = new TaskExecutor(jobProps);
        this.taskStateTracker = new LocalTaskStateTracker(jobProps, this.jobContext.getJobState(),
                this.taskExecutor, this.eventBus);

        this.serviceManager = new ServiceManager(Lists.newArrayList(
                // The order matters due to dependencies between services
                this.taskExecutor, this.taskStateTracker));
        // Start all dependent services
        this.serviceManager.startAsync().awaitHealthy(5, TimeUnit.SECONDS);

        startCancellationExecutor();

        jobLocalSetupTimer.stop();
    }

    public LocalJobLauncher(Configurable instanceConf, JobSpec jobSpec) throws Exception {
        this(JobConfigurationUtils.combineSysAndJobProperties(instanceConf.getConfigAsProperties(),
                jobSpec.getConfigAsProperties()));
    }

    @Override
    public void close() throws IOException {
        try {
            // Stop all dependent services
            this.serviceManager.stopAsync().awaitStopped(5, TimeUnit.SECONDS);
        } catch (TimeoutException te) {
            LOG.warn("Timed out while waiting for the service manager to be stopped", te);
        } finally {
            super.close();
        }
    }

    @Override
    protected void runWorkUnits(List<WorkUnit> workUnits) throws Exception {
        // This should never happen
        throw new UnsupportedOperationException();
    }

    @Override
    protected void runWorkUnitStream(WorkUnitStream workUnitStream) throws Exception {
        String jobId = this.jobContext.getJobId();
        final JobState jobState = this.jobContext.getJobState();

        Iterator<WorkUnit> workUnitIterator = workUnitStream.getWorkUnits();
        if (!workUnitIterator.hasNext()) {
            LOG.warn("No work units to run");
            return;
        }

        TimingEvent workUnitsRunTimer = this.eventSubmitter
                .getTimingEvent(TimingEvent.RunJobTimings.WORK_UNITS_RUN);
        Iterator<WorkUnit> flattenedWorkUnits = new MultiWorkUnitUnpackingIterator(workUnitStream.getWorkUnits());
        Iterator<WorkUnit> workUnitsWithJobState = Iterators.transform(flattenedWorkUnits,
                new Function<WorkUnit, WorkUnit>() {
                    @Override
                    public WorkUnit apply(WorkUnit workUnit) {
                        workUnit.addAllIfNotExist(jobState);
                        return workUnit;
                    }
                });

        GobblinMultiTaskAttempt.runWorkUnits(this.jobContext, workUnitsWithJobState, this.taskStateTracker,
                this.taskExecutor, GobblinMultiTaskAttempt.CommitPolicy.IMMEDIATE);

        if (this.cancellationRequested) {
            // Wait for the cancellation execution if it has been requested
            synchronized (this.cancellationExecution) {
                if (this.cancellationExecuted) {
                    return;
                }
            }
        }
        workUnitsRunTimer.stop();

        LOG.info(String.format("All tasks of job %s have completed", jobId));

        if (jobState.getState() == JobState.RunningState.RUNNING) {
            jobState.setState(JobState.RunningState.SUCCESSFUL);
        }
    }

    @Override
    protected void executeCancellation() {

    }
}