KillExecutionAction.java

/*
 * Copyright 2012 LinkedIn Corp.
 * 
 * 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.trigger.builtin;

import java.util.HashMap;
import java.util.Map;

import org.apache.log4j.Logger;

import azkaban.executor.ExecutableFlow;
import azkaban.executor.ExecutorManagerAdapter;
import azkaban.executor.Status;
import azkaban.trigger.TriggerAction;

public class KillExecutionAction implements TriggerAction{

	public static final String type = "KillExecutionAction";
	
	private static final Logger logger = Logger.getLogger(KillExecutionAction.class);
	
	private String actionId;
	private int execId;
	private static ExecutorManagerAdapter executorManager;
	
	public KillExecutionAction(String actionId, int execId) {
		this.execId = execId;
		this.actionId = actionId;
	}
	
	public static void setExecutorManager(ExecutorManagerAdapter em) {
		executorManager = em;
	}
	
	@Override
	public String getId() {
		return actionId;
	}

	@Override
	public String getType() {
		return type;
	}

	@SuppressWarnings("unchecked")
	public static KillExecutionAction createFromJson(Object obj) {
		return createFromJson((HashMap<String, Object>)obj);
	}
	
	public static KillExecutionAction createFromJson(HashMap<String, Object> obj) {
		Map<String, Object> jsonObj = (HashMap<String, Object>) obj;
		String objType = (String) jsonObj.get("type");
		if(! objType.equals(type)) {
			throw new RuntimeException("Cannot create action of " + type + " from " + objType);
		}
		String actionId = (String) jsonObj.get("actionId");
		int execId = Integer.valueOf((String) jsonObj.get("execId"));
		return new KillExecutionAction(actionId, execId);
	}
	
	@SuppressWarnings("unchecked")
	@Override
	public KillExecutionAction fromJson(Object obj) throws Exception {
		return createFromJson((HashMap<String, Object>)obj);
	}

	@Override
	public Object toJson() {
		Map<String, Object> jsonObj = new HashMap<String, Object>();
		jsonObj.put("actionId", actionId);
		jsonObj.put("type", type);
		jsonObj.put("execId", String.valueOf(execId));
		return jsonObj;
	}

	@Override
	public void doAction() throws Exception {
		ExecutableFlow exFlow = executorManager.getExecutableFlow(execId);
		logger.info("ready to kill execution " + execId);
		if(!Status.isStatusFinished(exFlow.getStatus())) {
			logger.info("Killing execution " + execId);
			executorManager.cancelFlow(exFlow, "azkaban_sla");
		}
	}

	@Override
	public void setContext(Map<String, Object> context) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public String getDescription() {
		return type + " for " + execId;
	}

}