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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.jini.service.core;
import java.io.IOException;
import java.net.MalformedURLException;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.server.ExportException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import net.jini.core.entry.Entry;
import net.jini.core.lease.Lease;
import net.jini.core.lease.LeaseDeniedException;
import net.jini.core.lease.UnknownLeaseException;
import net.jini.core.lookup.ServiceID;
import net.jini.core.lookup.ServiceItem;
import net.jini.core.lookup.ServiceRegistrar;
import net.jini.core.lookup.ServiceRegistration;
import org.eclipse.osee.framework.jini.discovery.IRegistrarListener;
import org.eclipse.osee.framework.jini.discovery.ServiceDataStore;
import org.eclipse.osee.framework.jini.service.interfaces.IService;
import org.eclipse.osee.framework.jini.util.OseeJini;
/**
* @author Andrew M. Finkbeiner
*/
public class JiniJoinManager implements IRegistrarListener {
/**
* The amount of time before a lease expires to first attempt renewal. This amount of time should be sufficiently
* large to account for delays in communication (i.e. network delays), and allow for at least a few retries in the
* event the service is not reachable. This time is specified in milliseconds.
*/
private static final long RENEWAL_TIME = 2 * 60 * 1000; // 2 minutes
// private HashMap<ServiceID, ServiceRegistrar> idToReggie;
private final HashMap<ServiceID, ServiceRegistrar> idToReggie;
// private ArrayList<ServiceRegistration> registrations;
private final ArrayList<ServiceRegistration> registrations;
private final Timer renewTimer;
private final Remote proxy;
private final Entry[] entry;
private final ServiceID serviceID;
private final ServiceDataStore serviceDataStore;
public JiniJoinManager(ServiceID serviceID, JiniService js, Entry[] entry) throws IOException {
proxy = OseeJini.getRemoteReference(js);
this.entry = entry;
this.serviceID = serviceID;
registrations = new ArrayList<ServiceRegistration>();
idToReggie = new HashMap<ServiceID, ServiceRegistrar>();
renewTimer = new Timer();
serviceDataStore = ServiceDataStore.getNonEclipseInstance();
serviceDataStore.addListener(this);
}
public JiniJoinManager(ServiceID serviceID, IService service, Entry[] entry) {
proxy = service;
this.entry = entry;
this.serviceID = serviceID;
registrations = new ArrayList<ServiceRegistration>();
idToReggie = new HashMap<ServiceID, ServiceRegistrar>();
renewTimer = new Timer();
serviceDataStore = ServiceDataStore.getNonEclipseInstance();
serviceDataStore.addListener(this);
}
public void terminate() throws RemoteException {
renewTimer.cancel();
for (int i = 0; i < registrations.size(); i++) {
ServiceRegistration registration = registrations.get(i);
try {
registration.getLease().cancel();
} catch (UnknownLeaseException ex) {
}
}
}
public void setAttributes(Entry[] entry) {
for (int i = 0; i < registrations.size(); i++) {
ServiceRegistration registration = registrations.get(i);
try {
registration.setAttributes(entry);
} catch (UnknownLeaseException ex) {
registrations.remove(i);
i--;
// ex.printStackTrace();
} catch (RemoteException ex) {
registrations.remove(i);
i--;
// ex.printStackTrace();
}
}
}
private class RenewLease extends TimerTask {
ServiceRegistration registration;
public RenewLease(ServiceRegistration registration) {
this.registration = registration;
}
@Override
public void run() {
try {
// Renew for the maximum amount of time allowed
registration.getLease().renew(Lease.FOREVER);
renewTimer.schedule(new RenewLease(registration),
registration.getLease().getExpiration() - System.currentTimeMillis() - RENEWAL_TIME);
} catch (LeaseDeniedException ex) {
// ex.printStackTrace();
} catch (UnknownLeaseException ex) {
// ex.printStackTrace();
} catch (RemoteException ex) {
// ex.printStackTrace();
}
// finally{
// renewTimer.schedule(new RenewLease(registration), registration.getLease().getExpiration() - System.currentTimeMillis() - RENEWAL_TIME);
// }
}
}
public void addGroup(String... groups) throws IOException {
serviceDataStore.addGroup(groups);
}
public String[] getGroups() {
return serviceDataStore.getGroups();
}
@Override
public void reggieAdded(List<ServiceRegistrar> serviceRegistrars) {
ServiceRegistrar[] reggies = serviceRegistrars.toArray(new ServiceRegistrar[serviceRegistrars.size()]);
try {
for (int i = 0; i < reggies.length; i++) {
ServiceRegistration registration;
registration = reggies[i].register(new ServiceItem(serviceID, proxy, entry), Long.MAX_VALUE);
idToReggie.put(reggies[i].getServiceID(), reggies[i]);
registrations.add(registration);
renewTimer.schedule(new RenewLease(registration),
registration.getLease().getExpiration() - System.currentTimeMillis() - RENEWAL_TIME);
}
} catch (ExportException ex) {
ex.printStackTrace();
} catch (RemoteException ex) {
ex.printStackTrace();
} catch (Throwable t) {
t.printStackTrace();
}
}
@Override
public void reggieRemoved(List<ServiceRegistrar> serviceRegistrars) {
ServiceRegistrar[] reggies = serviceRegistrars.toArray(new ServiceRegistrar[serviceRegistrars.size()]);
for (int i = 0; i < reggies.length; i++) {
idToReggie.remove(reggies[i].getServiceID());
}
}
@Override
public void reggieChanged(List<ServiceRegistrar> serviceRegistrars) {
}
public Entry[] getEntry() {
return entry;
}
public Collection<ServiceRegistrar> getRegistrations() {
return Collections.unmodifiableCollection(idToReggie.values());
}
public Remote getProxy() {
return proxy;
}
public ServiceRegistrar findRegistrar(String host) throws MalformedURLException, ClassNotFoundException, IOException {
return serviceDataStore.findRegistrar(host);
}
}
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