ApplicationController.java

/*
 * Copyright 2011 Matthias van der Vlies
 *
 *  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 controllers;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.List;

import net.sf.oval.constraint.Email;

import models.Application;
import models.ApplicationProperty;
import play.Logger;
import play.Play;
import play.data.validation.Valid;
import play.db.jpa.JPA;
import play.mvc.Controller;
import core.ConfigurationManager;
import core.ProcessManager;

public class ApplicationController extends Controller {
	
	public static void show(final Long id) {
		final Application application = Application.findById(id);
		if(application == null) {
			notFound();
		}
		else {
			final List<ApplicationProperty> properties = ApplicationProperty.find("application = ? and priority > ? order by priority", application, ConfigurationManager.PRIORITY_MARGIN).fetch();
			render(application, properties);
		}
	}
	
	public static void edit(final Long id, final String configuration) throws Exception {
		final Application application = Application.findById(id);
		if(application == null) {
			notFound();
		}
		else {
			ConfigurationManager.readCurrentConfigurationFromString(application, configuration);
			show(id);
		}
	}
	
	public static void create(@Valid final Application application) throws Exception {
		if(!validation.hasErrors()) {
			application.enabled = false;
			application.checkedOut = false;
			application.clean(); // override checkout if already exists
			application.checkout();
		}
		else {
			params.flash();
			validation.keep();
		}

		ManagerController.index();
	}
	
	public static void start(final Long id) throws InterruptedException, Exception {
		final Application application = Application.findById(id);
		
		if(application == null) {
			notFound();
		}
		else {
			Logger.info("Starting %s, this could take up to %s seconds when application fails to start", application.pid, Application.getCommandTimeout());
			// forced start
			application.start(true, true);

			// make the action persistent upon crash
			application.enabled = true;
			application.save();
			
			ManagerController.index();
		}
	}

	public static void stop(final Long id) throws InterruptedException, Exception {
		final Application application = Application.findById(id);
		
		if(application == null) {
			notFound();
		}
		else {
			application.enabled = false;
			application.save();
			
			Logger.info("Requesting to stop %s", application.pid);

			ManagerController.index();
		}
	}
	
	public static void update(final Long id) throws Exception {
		final Application application = Application.findById(id);
		
		if(application == null) {
			notFound();
		}
		else {
			application.pull();
			ManagerController.index();
		}
	}
	
	public static void restart(final Long id) throws InterruptedException, Exception {
		final Application application = Application.findById(id);
		
		if(application == null) {
			notFound();
		}
		else {
			Logger.info("Requesting to restart %s", application.pid);
			application.restart();

			ManagerController.index();
		}
	}
	
	public static void remove(final Long id) throws Exception {
		final Application application = Application.findById(id);
		
		if(application == null) {
			notFound();
		}
		else {
			application.stop();
			
			// make sure it gets stopped
			application.enabled = false;
			JPA.em().flush();
			
			// First we remove the entity to avoid the process manager to start it back up again
			for(final ApplicationProperty property : application.properties) {
				property.delete();
			}
			
			application.delete();
			application.clean();
	
			Logger.info("Removed %s", application.pid);
			
			ManagerController.index();
		}
	}
	
	public static void status(final Long id) throws Exception {
		final Application application = Application.findById(id);
		
		if(application == null) {
			notFound();
		}
		else {
			final String status = application.status();
			render(status);
		}
	}
}