/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.uima.ducc.agent.deploy;

import java.util.List;

import org.apache.camel.CamelContext;
import org.apache.uima.ducc.common.component.AbstractDuccComponent;
import org.apache.uima.ducc.common.main.DuccService;
import org.apache.uima.ducc.transport.agent.IUimaPipelineAEComponent;
import org.apache.uima.ducc.transport.event.common.IProcessState.ProcessState;


public abstract class AbstractManagedService extends AbstractDuccComponent
implements ManagedService {
	public static final String ManagedServiceNotificationInterval = "uima.process.notify.interval";
	private long notificationInterval = 5000;
	protected ProcessState currentState = ProcessState.Undefined;
	protected ProcessState previousState = ProcessState.Undefined;
   // public static ManagedServiceContext serviceContext=null; 
    public boolean useJmx = false;
    public ServiceStateNotificationAdapter serviceAdapter = null;
    
    public abstract void quiesceAndStop();
    public abstract void deploy(String[] args) throws Exception;
    
	protected AbstractManagedService(ServiceStateNotificationAdapter serviceAdapter, CamelContext context) {
		super("UimaProcess", context);
		this.serviceAdapter = serviceAdapter;
		//		serviceContext = new ManagedServiceContext(this);
	}
	/**
	 * @return the notificationInterval
	 */
	public long getNotificationInterval() {
		return notificationInterval;
	}

	/**
	 * @param notificationInterval
	 *            the notificationInterval to set
	 */
	public void setNotificationInterval(long notificationInterval) {
		this.notificationInterval = notificationInterval;
	}


	public void initialize() throws Exception {
		
//		ServiceShutdownHook shutdownHook = new ServiceShutdownHook(this);
		// serviceDeployer);
//		Runtime.getRuntime().addShutdownHook(shutdownHook);
//		System.out.println("Managed Service Wrapper Registered Shutdown Hook");
	}

	public void notifyAgentWithStatus(ProcessState state) {
		serviceAdapter.notifyAgentWithStatus(state);
	}
	public void notifyAgentWithStatus(ProcessState state, String message) {
		serviceAdapter.notifyAgentWithStatus(state, message);
	}
	public void notifyAgentWithStatus(List<IUimaPipelineAEComponent> pipeline) {
		serviceAdapter.notifyAgentWithStatus(pipeline);
	}
	protected void stopIt() {
		if ( serviceAdapter != null ) {
			//serviceAdapter.stop();
		}
	}
	/**
	 * Returns state of this process( INITIALIZING, RUNNING, FAILED, STOPPED )
	 */
	public ProcessState getServiceState() {
		return currentState;
	}
	@Override
	public void start(DuccService service, String[] args) throws Exception {
		try {
			super.start(service, args);
			deploy(args);
		} catch( Exception e) {
			currentState = ProcessState.FailedInitialization;
			notifyAgentWithStatus(ProcessState.FailedInitialization);
			throw e;
		}
	}
	public void stop() {
		if ( super.isStopping() ) {
			return;  // already stopping - nothing to do
		}
		try {
			System.out.println("... AbstractManagedService - Stopping Service Adapter");
			serviceAdapter.stop();
			System.out.println("... AbstractManagedService - Calling super.stop() ");
			super.stop();
		} catch( Exception e) {
			e.printStackTrace();
		}
	}
	static class ServiceShutdownHook extends Thread {
		private AbstractManagedService managedService;

		public ServiceShutdownHook(AbstractManagedService service) {
			this.managedService = service;
		}

		public void run() {
			try {
				System.out
						.println("Uima AS Service Wrapper Caught Kill Signal - Initiating Quiesce and Stop");
				managedService.quiesceAndStop();
				managedService.stopIt();
				
			} catch (Exception e) {
			}
		}
	}

}