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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.skynet.core.event.systems;
import java.rmi.RemoteException;
import java.rmi.server.ExportException;
import java.util.logging.Level;
import net.jini.core.entry.Entry;
import net.jini.core.lookup.ServiceItem;
import org.eclipse.osee.framework.core.client.ClientSessionManager;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.framework.jini.discovery.EclipseJiniClassloader;
import org.eclipse.osee.framework.jini.discovery.IServiceLookupListener;
import org.eclipse.osee.framework.jini.discovery.ServiceDataStore;
import org.eclipse.osee.framework.jini.service.core.SimpleFormattedEntry;
import org.eclipse.osee.framework.jini.util.OseeJini;
import org.eclipse.osee.framework.logging.OseeLog;
import org.eclipse.osee.framework.messaging.event.skynet.ISkynetEvent;
import org.eclipse.osee.framework.messaging.event.skynet.ISkynetEventListener;
import org.eclipse.osee.framework.messaging.event.skynet.ISkynetEventService;
import org.eclipse.osee.framework.skynet.core.UserManager;
import org.eclipse.osee.framework.skynet.core.event.EventSystemPreferences;
import org.eclipse.osee.framework.skynet.core.event.OseeEventManager;
import org.eclipse.osee.framework.skynet.core.event.RemoteEventServiceEventType;
import org.eclipse.osee.framework.skynet.core.internal.Activator;
/**
* @author Donald G. Dunne
*/
public final class JiniSkynetEventServiceLookup implements IServiceLookupListener {
private final ISkynetEventListener clientEventListener;
private String acceptableServiceName;
private ISkynetEventService currentEventService;
private ISkynetEventListener clientEventListenerRemoteReference;
private final EventSystemPreferences preferences;
public JiniSkynetEventServiceLookup(EventSystemPreferences preferences, ISkynetEventListener clientEventListener) {
this.preferences = preferences;
this.clientEventListener = clientEventListener;
clear();
}
private void clear() {
currentEventService = null;
clientEventListenerRemoteReference = null;
acceptableServiceName = null;
}
public void start() {
getClientEventListenerRemoteReference();
}
public void stop() {
if (clientEventListenerRemoteReference != null) {
ServiceDataStore.getEclipseInstance(EclipseJiniClassloader.getInstance()).removeListener(this);
}
reset();
}
public ISkynetEventListener getClientEventListenerRemoteReference() {
checkJiniRegistration();
return clientEventListenerRemoteReference;
}
public void checkJiniRegistration() {
if (preferences.isNewEvents()) {
return;
}
if (clientEventListenerRemoteReference == null) {
try {
// We need to trigger authentication before attempting to get database information from client session manager.
UserManager.getUser();
acceptableServiceName =
ClientSessionManager.getDataStoreName() + ":" + ClientSessionManager.getDataStoreLoginName();
clientEventListenerRemoteReference =
(ISkynetEventListener) OseeJini.getRemoteReference(clientEventListener);
} catch (Exception ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
clientEventListenerRemoteReference = null;
}
if (clientEventListenerRemoteReference != null) {
ServiceDataStore.getEclipseInstance(EclipseJiniClassloader.getInstance()).addListener(this,
ISkynetEventService.class);
}
}
}
private ISkynetEventService getReference() {
return currentEventService;
}
public boolean isValid() {
return isValidService(currentEventService);
}
public void reset() {
setEventService(null);
}
public void kick(ISkynetEvent[] events, ISkynetEventListener... except) {
try {
getReference().kick(events, except);
} catch (ExportException ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
} catch (RemoteException ex) {
disconnectService(ex);
}
}
private boolean isValidService(ISkynetEventService service) {
boolean result = false;
try {
if (service != null) {
result = service.isAlive();
}
} catch (Exception ex) {
// Do Nothing
result = false;
}
return result;
}
private synchronized void setEventService(ISkynetEventService service) {
if (isValidService(currentEventService)) {
try {
currentEventService.deregister(getClientEventListenerRemoteReference());
} catch (RemoteException ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
}
}
currentEventService = service;
}
private void disconnectService(Exception e) {
if (preferences.isNewEvents()) {
return;
}
OseeLog.log(Activator.class, Level.WARNING, "Skynet Event Service connection lost\n" + e.toString(), e);
setEventService(null);
try {
OseeEventManager.kickLocalRemEvent(this, RemoteEventServiceEventType.Rem1_DisConnected);
} catch (OseeCoreException ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
}
}
private void connectToService(ISkynetEventService service) {
if (preferences.isNewEvents()) {
return;
}
try {
ISkynetEventListener clientListener = getClientEventListenerRemoteReference();
if (clientListener != null) {
service.register(clientListener);
setEventService(service);
OseeLog.log(Activator.class, Level.INFO,
"Skynet Event Service connection established " + acceptableServiceName);
OseeEventManager.kickLocalRemEvent(this, RemoteEventServiceEventType.Rem1_Connected);
} else {
OseeLog.log(Activator.class, Level.SEVERE, "Client listener reference was null");
}
} catch (Exception ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
}
}
@Override
public void serviceAdded(ServiceItem serviceItem) {
if (preferences.isNewEvents()) {
return;
}
if (serviceItem.service instanceof ISkynetEventService) {
ISkynetEventService service = (ISkynetEventService) serviceItem.service;
if (isValidService(service)) {
// Check if the service is for the database we are using
for (Entry entry : serviceItem.attributeSets) {
if (entry instanceof SimpleFormattedEntry) {
SimpleFormattedEntry simpleEntry = (SimpleFormattedEntry) entry;
if ("db".equals(simpleEntry.name) && acceptableServiceName.equals(simpleEntry.value)) {
connectToService(service);
break;
}
}
}
}
}
}
@Override
public void serviceChanged(ServiceItem serviceItem) {
serviceAdded(serviceItem);
}
@Override
public void serviceRemoved(ServiceItem serviceItem) {
// do nothing
}
}
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