TriggerManagerServlet.java

/*
 * Copyright 2012 LinkedIn, Inc
 * 
 * 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 azkaban.webapp.servlet;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import azkaban.trigger.Trigger;
import azkaban.trigger.TriggerManager;
import azkaban.trigger.TriggerManagerException;
import azkaban.user.User;
import azkaban.webapp.AzkabanWebServer;
import azkaban.webapp.session.Session;

public class TriggerManagerServlet extends LoginAbstractAzkabanServlet {
	private static final long serialVersionUID = 1L;
	private static final Logger logger = Logger.getLogger(TriggerManagerServlet.class);
	private TriggerManager triggerManager;

	@Override
	public void init(ServletConfig config) throws ServletException {
		super.init(config);
		AzkabanWebServer server = (AzkabanWebServer)getApplication();
		triggerManager = server.getTriggerManager();
	}
	
	@Override
	protected void handleGet(HttpServletRequest req, HttpServletResponse resp,
			Session session) throws ServletException, IOException {
		if (hasParam(req, "ajax")) {
			handleAJAXAction(req, resp, session);
		} else {
			handleGetAllSchedules(req, resp, session);
		}
	}
	
	private void handleAJAXAction(HttpServletRequest req, HttpServletResponse resp, Session session) throws ServletException, IOException {
		HashMap<String, Object> ret = new HashMap<String, Object>();
		String ajaxName = getParam(req, "ajax");
		
		try {
			if (ajaxName.equals("expireTrigger")) {
				ajaxExpireTrigger(req, ret, session.getUser());
			}
		} catch (Exception e) {
			ret.put("error", e.getMessage());
		}
		
		if (ret != null) {
			this.writeJSON(resp, ret);
		}
	}

	private void handleGetAllSchedules(HttpServletRequest req, HttpServletResponse resp,
			Session session) throws ServletException, IOException{
		
		Page page = newPage(req, resp, session, "azkaban/webapp/servlet/velocity/triggerspage.vm");
		
		List<Trigger> triggers = triggerManager.getTriggers();
		page.add("triggers", triggers);
//		
//		List<SLA> slas = slaManager.getSLAs();
//		page.add("slas", slas);

		page.render();
	}
	
	@Override
	protected void handlePost(HttpServletRequest req, HttpServletResponse resp, Session session) throws ServletException, IOException {
		if (hasParam(req, "ajax")) {
			handleAJAXAction(req, resp, session);
		}
	}

	private void ajaxExpireTrigger(HttpServletRequest req, Map<String, Object> ret, User user) throws ServletException, TriggerManagerException{
		int triggerId = getIntParam(req, "triggerId");
		Trigger t = triggerManager.getTrigger(triggerId);
		if(t == null) {
			ret.put("message", "Trigger with ID " + triggerId + " does not exist");
			ret.put("status", "error");
			return;
		}
		
//		if(!hasPermission(project, user, Type.SCHEDULE)) {
//			ret.put("status", "error");
//			ret.put("message", "Permission denied. Cannot remove trigger with id " + triggerId);
//			return;
//		}

		triggerManager.expireTrigger(triggerId);
		logger.info("User '" + user.getUserId() + " has removed trigger " + t.getDescription());
//		projectManager.postProjectEvent(project, EventType.SCHEDULE, user.getUserId(), "Schedule " + sched.toString() + " has been removed.");
		
		ret.put("status", "success");
		ret.put("message", "trigger " + triggerId + " removed from Schedules.");
		return;
	}

}