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/*
 * Copyright (c) 2017 simplity.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package org.simplity.job;

import org.simplity.kernel.Application;
import org.simplity.kernel.ApplicationError;
import org.simplity.kernel.MessageBox;
import org.simplity.kernel.Tracer;
import org.simplity.service.ServiceData;
import org.simplity.service.ServiceInterface;

/**
 * a thread that runs a service with given input data
 *
 * @author simplity.org
 *
 */
public class RunningJob implements Runnable {
	private final ServiceInterface service;
	private final ServiceData inData;
	private final MessageBox messageBox;
	private JobStatus jobStatus = JobStatus.SCHEDULED;

	/**
	 * create a job thread to run a service with the input data
	 *
	 * @param service
	 *            to be run as part of this job
	 * @param inData
	 *            input data to the service
	 */
	public RunningJob(ServiceInterface service, ServiceData inData) {
		this.service = service;
		this.inData = inData;
		this.messageBox = new MessageBox();
		this.inData.setMessageBox(this.messageBox);
	}

	@Override
	public void run() {
		/*
		 * remember : this is the thread that would run as long as the service
		 * wants it.The service may be designed to run for ever, or it may be
		 * a batch job and return once known set of work is finished. It is
		 * possible that getJobStatus() be invoked from another thread, and
		 * hence we keep that field updated
		 */
		this.jobStatus = JobStatus.RUNNING;
		Tracer.trace("Job status set to  " + this.jobStatus);
		try {
			this.service.respond(this.inData);
			Tracer.trace("Service " + this.service.getQualifiedName() + " is done..");
			this.jobStatus = JobStatus.DONE;
			Tracer.trace("Reset to  " + this.jobStatus);
		} catch (Exception e) {
			this.jobStatus = JobStatus.FAILED;
			String msg = "Error while running service " + this.service.getQualifiedName() + " as a batch job.";
			Application.reportApplicationError(this.inData, new ApplicationError(e, msg));
		}
	}

	/**
	 *
	 * @return current job status
	 */
	public JobStatus getJobStatus() {
		return this.jobStatus;
	}
	/**
	 *
	 * @return current job status
	 */
	public String getServiceStatus() {
		Object msg = this.messageBox.getMessage();
		if(msg == null){
			return "unknown";
		}
		return msg.toString();
	}
}