/*******************************************************************************
* Copyright (c) 2007 Versant Corp.
* 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:
* Markus Kuppe (mkuppe <at> versant <dot> com) - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.internal.provider.jslp;
import ch.ethz.iks.slp.ServiceLocationException;
import ch.ethz.iks.slp.ServiceURL;
import java.util.*;
import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.ecf.core.util.Trace;
import org.eclipse.ecf.discovery.IServiceInfo;
import org.eclipse.ecf.provider.jslp.container.JSLPDiscoveryContainer;
import org.eclipse.ecf.provider.jslp.container.JSLPServiceInfo;
import org.osgi.framework.Bundle;
public final class JSLPDiscoveryJob extends Job {
private final JSLPDiscoveryContainer discoveryContainer;
private final Map services;
public JSLPDiscoveryJob(final JSLPDiscoveryContainer container) {
super("SLP Discovery"); //$NON-NLS-1$
discoveryContainer = container;
services = Collections.synchronizedMap(new HashMap());
}
/*
* (non-Javadoc)
*
* @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor)
*/
protected IStatus run(final IProgressMonitor monitor) {
Assert.isNotNull(monitor);
try {
final Map availableServices = Activator.getDefault().getLocator().getServiceURLs();
final Map removedServices = new HashMap(services);
for (final Iterator itr = availableServices.entrySet().iterator(); itr.hasNext() && !monitor.isCanceled();) {
final Map.Entry entry = (Map.Entry) itr.next();
final ServiceURL url = (ServiceURL) entry.getKey();
// do we know the service already?
if (removedServices.containsKey(url)) {
removedServices.remove(url);
} else { // we don't know the service, so we need to create the
final ServicePropertiesAdapter spa = new ServicePropertiesAdapter((List) entry.getValue());
final String serviceName = spa.getServiceName() == null ? url.toString() : spa.getServiceName();
final IServiceInfo serviceInfo = new JSLPServiceInfo(serviceName, new ServiceURLAdapter(url), spa.getPriority(), spa.getWeight(), spa);
services.put(url, serviceInfo);
discoveryContainer.fireServiceTypeDiscovered(serviceInfo.getServiceID().getServiceTypeID());
discoveryContainer.fireServiceDiscovered(serviceInfo);
}
monitor.worked(1);
}
// at this point removedServices only contains stale services
for (final Iterator itr = removedServices.entrySet().iterator(); itr.hasNext() && !monitor.isCanceled();) {
final Map.Entry entry = (Map.Entry) itr.next();
final Object key = entry.getKey();
final IServiceInfo value = (IServiceInfo) entry.getValue();
discoveryContainer.fireServiceUndiscovered(value);
services.remove(key);
monitor.worked(1);
}
} catch (final ServiceLocationException e) {
// TODO-mkuppe if the advertiser is gone, we run into this exception
// but we have to let the listeners know about the gone services
// too
Trace.catching(Activator.PLUGIN_ID, JSLPDebugOptions.EXCEPTIONS_CATCHING, this.getClass(), "run", e); //$NON-NLS-1$
}
// check if the JSLPDiscoveryContainer has been disconnected or disposed
if (discoveryContainer.getConnectedID() != null) {
this.schedule(JSLPDiscoveryContainer.REDISCOVER);
}
return Status.OK_STATUS;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.jobs.Job#shouldRun()
*/
public boolean shouldRun() {
if (Activator.getDefault() != null) {// system went down, no bundle
final int state = Activator.getDefault().getBundle().getState();
return (state == Bundle.ACTIVE || state == Bundle.STARTING);
}
return false;
}
public Collection purgeCache() {
Set unmodifiableSet = Collections.unmodifiableSet(services.entrySet());
services.clear();
return unmodifiableSet;
}
}