gobblin.runtime.locks.JobLockFactory.java Source code

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Here is the source code for gobblin.runtime.locks.JobLockFactory.java

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/*
 * Copyright (C) 2014-2016 LinkedIn Corp. 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. 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.
 */

package gobblin.runtime.locks;

import java.lang.reflect.InvocationTargetException;
import java.util.Properties;

import com.google.common.base.Preconditions;
import gobblin.configuration.ConfigurationKeys;
import org.apache.commons.lang3.reflect.ConstructorUtils;

/**
 * The factory used to create instances of {@link JobLock}.
 *
 * @author joelbaranick
 */
public class JobLockFactory {
    private JobLockFactory() {
    }

    /**
     * Gets an instance of {@link JobLock}.
     *
     * @param properties the properties used to determine which instance of {@link JobLock} to create and the
     *                   relevant settings
     * @param jobLockEventListener the {@link JobLock} event listener
     * @return an instance of {@link JobLock}
     * @throws JobLockException throw when the {@link JobLock} fails to initialize
     */
    public static JobLock getJobLock(Properties properties, JobLockEventListener jobLockEventListener)
            throws JobLockException {
        Preconditions.checkNotNull(properties);
        Preconditions.checkNotNull(jobLockEventListener);
        JobLock jobLock;
        if (properties.containsKey(ConfigurationKeys.JOB_LOCK_TYPE)) {
            try {
                Class<?> jobLockClass = Class.forName(
                        properties.getProperty(ConfigurationKeys.JOB_LOCK_TYPE, FileBasedJobLock.class.getName()));
                jobLock = (JobLock) ConstructorUtils.invokeConstructor(jobLockClass, properties);
            } catch (ClassNotFoundException | InstantiationException | IllegalAccessException
                    | NoSuchMethodException | InvocationTargetException e) {
                throw new JobLockException(e);
            }
        } else {
            jobLock = new FileBasedJobLock(properties);
        }
        if (jobLock instanceof ListenableJobLock) {
            ((ListenableJobLock) jobLock).setEventListener(jobLockEventListener);
        }
        return jobLock;
    }
}