LegacyJobLockFactoryManager.java

/*
 * 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 gobblin.runtime.locks;

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

import org.apache.commons.lang3.reflect.ConstructorUtils;

import com.google.common.base.Preconditions;

import gobblin.configuration.ConfigurationKeys;


/**
 * The factory used to create instances of {@link JobLock}.
 *
 * @author joelbaranick
 */
public class LegacyJobLockFactoryManager {

  /**
   * 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;
  }
}