ServiceMgmtListener.java

/**
 * Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET 
 * (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
 * informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
 * COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp., 
 * INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM 
 * ITALIA S.p.a.(TI),  TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.societies.webapp.controller.services;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.societies.api.osgi.event.CSSEvent;
import org.societies.api.osgi.event.EventListener;
import org.societies.api.osgi.event.EventTypes;
import org.societies.api.osgi.event.IEventMgr;
import org.societies.api.osgi.event.InternalEvent;
import org.societies.api.schema.servicelifecycle.model.ServiceType;
import org.societies.api.services.ServiceMgmtEvent;

/**
 * Describe your class here...
 *
 * @author <a href="mailto:sanchocsa@gmail.com">Sancho Rêgo</a> (PTIN)
 *
 */
public class ServiceMgmtListener extends EventListener {

	private static final Logger log = LoggerFactory.getLogger(ServiceMgmtListener.class);
	private ServicesController controller;
	private IEventMgr eventMgr;
	
	public ServiceMgmtListener(ServicesController controller, IEventMgr eventMgr) {
		if(log.isDebugEnabled())
			log.debug("Service Management Listener for Webapp created!");
		this.controller = controller;
		this.eventMgr = eventMgr;
		eventMgr.subscribeInternalEvent(this, new String[]{EventTypes.SERVICE_LIFECYCLE_EVENT}, null);
	}

	/* (non-Javadoc)
	 * @see org.societies.api.osgi.event.EventListener#handleInternalEvent(org.societies.api.osgi.event.InternalEvent)
	 */
	@Override
	public void handleInternalEvent(InternalEvent event) {
		log.debug("InternalEvent arrived: {}",event.geteventName());

		try{
		
			if(event.geteventType().equals(EventTypes.SERVICE_LIFECYCLE_EVENT)){
				ServiceMgmtEvent ourEvent = (ServiceMgmtEvent) event.geteventInfo();
				log.debug("Received event is of type: {} for serviceId {}",ourEvent.getEventType(),ourEvent.getServiceId());
				
				if(ourEvent.getServiceId() == null){
					log.warn("Service Id of received event was null! This should not happen, aborting!");
					return;
				}
				
				ServiceWrapper service = controller.getService(ourEvent.getServiceId());
					
				switch(ourEvent.getEventType()){
					case NEW_SERVICE:
						if(ourEvent.getServiceType().equals(ServiceType.THIRD_PARTY_CLIENT) || ourEvent.getServiceType().equals(ServiceType.DEVICE))
							controller.serviceInstalled(ourEvent.getServiceId());
						break;
					case SERVICE_REMOVED: 
						if(controller.getServiceId()==null){
							controller.serviceRemoved(ourEvent.getServiceId(), ourEvent.getServiceName(),ourEvent.getServiceType());
						} else{
							log.debug("Event is being dealt with by the controller, so no need to be processed!");
						}
						break;
					case SERVICE_SHARED: 
						if(controller.getServiceId()==null){
							if(service != null && service.isSharedWithCis(ourEvent.getSharedNode().getJid())){
								log.debug("Service {} is already shared with this CIS, no need to process event.", ourEvent.getServiceName() );
								break;
							}
							controller.serviceShared(ourEvent.getServiceId(), ourEvent.getServiceName(), ourEvent.getSharedNode());
						}  else{
							log.debug("Event is being dealt with by the controller, so no need to be processed!");
						}
						break;
						
					case SERVICE_UNSHARED:
						if(controller.getServiceId()==null){
							if(service != null && !service.isSharedWithCis(ourEvent.getSharedNode().getJid())){
								log.debug("Service {} is already NOT shared with this CIS, no need to process event.", ourEvent.getServiceName() );
								break;
							}
							controller.serviceUnshared(ourEvent.getServiceId(), ourEvent.getServiceName(), ourEvent.getSharedNode());

						} else{
							log.debug("Event is being dealt with by the controller, so no need to be processed!");
						}
						break;
					case SERVICE_STARTED: 
						if(controller.getServiceId()==null){
							if(service != null && service.isStarted()){
								log.debug("Service {} is already started, no need to process event.", ourEvent.getServiceName() );
								break;
							}
							controller.serviceStarted(ourEvent.getServiceId(), ourEvent.getServiceName());
						} else{
							log.debug("Event is being dealt with by the controller, so no need to be processed!");
						}
						break;
					case SERVICE_STOPPED:
						if(controller.getServiceId()==null){
							if(service != null && service.isStopped()){
								log.debug("Service {} is already stopped, no need to process event.", ourEvent.getServiceName() );
								break;
							}
							controller.serviceStopped(ourEvent.getServiceId(), ourEvent.getServiceName());
						} else{
							log.debug("Event is being dealt with by the controller, so no need to be processed!");
						}
						break;
					case PROBLEM_OCURRED:
						controller.installFailed(ourEvent.getServiceId(), ourEvent.getServiceName());
						break;
				default: log.debug("Unknown event! {}",ourEvent.getEventType());
				}
			}
			
		} catch(Exception ex){
			log.error("Error in this listener, so we unregister!");
			ex.printStackTrace();
		}
		
	}


	@Override
	public void handleExternalEvent(CSSEvent event) {
		if(log.isDebugEnabled())
			log.debug("Nothing to do with a CSSEvent!");
		
	}
	
	public void unsubscribe(){
		this.eventMgr.unSubscribeInternalEvent(this, new String[]{EventTypes.SERVICE_LIFECYCLE_EVENT}, null);
		if(log.isDebugEnabled())
			log.debug("Service Management Listener for Webapp: unregistered!");
	}

}