Task.java

/*
 *  Copyright 2014 Eric F. Savage, code@efsavage.com
 *
 *   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 com.ajah.job.task;

import java.util.Date;

import lombok.Data;

import org.springframework.context.ApplicationContext;

import com.ajah.job.Job;
import com.ajah.job.run.Run;
import com.ajah.util.Identifiable;

/**
 * A task is a definition of something that can be executed as part of a
 * {@link Job}. It is assigned to the Job via a {@link JobTask}.
 * 
 * @author <a href="http://efsavage.com">Eric F. Savage</a>, <a
 *         href="mailto:code@efsavage.com">code@efsavage.com</a>.
 * 
 */
@Data
public class Task implements Identifiable<TaskId> {

	private TaskId id;
	private String name;
	private String clazz;
	private TaskStatus status;
	private TaskType type;
	private Date created;

	/**
	 * Execute the task.
	 * 
	 * @param run
	 *            The run this execution is part of.
	 * @param jobTask
	 *            The configuration within the current job.
	 * @param applicationContext
	 *            The application context for fetching beans from.
	 * @throws TaskExecutionException
	 *             If there are any errors that occur while executing the job.
	 *             This includes all {@link RuntimeException}s.
	 */
	public void execute(final Run run, final JobTask jobTask, final ApplicationContext applicationContext) throws TaskExecutionException {
		try {
			final AjahTask ajahTask = (AjahTask) Class.forName(getClazz()).newInstance();
			ajahTask.setApplicationContext(applicationContext);
			ajahTask.execute(run, jobTask);
		} catch (final RuntimeException e) {
			throw new TaskConfigurationException(e);
		} catch (final InstantiationException e) {
			throw new TaskConfigurationException(e);
		} catch (final IllegalAccessException e) {
			throw new TaskConfigurationException(e);
		} catch (final ClassNotFoundException e) {
			throw new TaskConfigurationException(e);
		}
	}

}