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/*******************************************************************************
* Copyright (c) 2007, 2010 Wind River Systems, Inc. and others.
* 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tm.internal.tcf.services.remote;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.tm.tcf.core.Command;
import org.eclipse.tm.tcf.core.TransientPeer;
import org.eclipse.tm.tcf.protocol.IChannel;
import org.eclipse.tm.tcf.protocol.IPeer;
import org.eclipse.tm.tcf.protocol.IToken;
import org.eclipse.tm.tcf.protocol.JSON;
import org.eclipse.tm.tcf.protocol.Protocol;
import org.eclipse.tm.tcf.services.ILocator;
public class LocatorProxy implements ILocator {
private final IChannel channel;
private final Map<String,IPeer> peers = new HashMap<String,IPeer>();
private final Collection<LocatorListener> listeners = new ArrayList<LocatorListener>();
private boolean get_peers_done = false;
private class Peer extends TransientPeer {
private final IPeer parent;
Peer(IPeer parent, Map<String,String> attrs) {
super(attrs);
this.parent = parent;
}
public IChannel openChannel() {
assert Protocol.isDispatchThread();
IChannel c = parent.openChannel();
c.redirect(getID());
return c;
}
};
private final IChannel.IEventListener event_listener = new IChannel.IEventListener() {
@SuppressWarnings("unchecked")
public void event(String name, byte[] data) {
try {
Object[] args = JSON.parseSequence(data);
if (name.equals("peerAdded")) {
assert args.length == 1;
IPeer peer = new Peer(channel.getRemotePeer(), (Map<String,String>)args[0]);
if (peers.get(peer.getID()) != null) {
Protocol.log("Invalid peerAdded event", new Error());
return;
}
peers.put(peer.getID(), peer);
for (LocatorListener l : listeners.toArray(new LocatorListener[listeners.size()])) {
try {
l.peerAdded(peer);
}
catch (Throwable x) {
Protocol.log("Unhandled exception in Locator listener", x);
}
}
}
else if (name.equals("peerChanged")) {
assert args.length == 1;
Map<String,String> m = (Map<String,String>)args[0];
if (m == null) throw new Error("Locator service: invalid peerChanged event - no peer ID");
IPeer peer = peers.get(m.get(IPeer.ATTR_ID));
if (peer == null) return;
peers.put(peer.getID(), peer);
for (LocatorListener l : listeners.toArray(new LocatorListener[listeners.size()])) {
try {
l.peerChanged(peer);
}
catch (Throwable x) {
Protocol.log("Unhandled exception in Locator listener", x);
}
}
}
else if (name.equals("peerRemoved")) {
assert args.length == 1;
String id = (String)args[0];
IPeer peer = peers.remove(id);
if (peer == null) return;
for (LocatorListener l : listeners.toArray(new LocatorListener[listeners.size()])) {
try {
l.peerRemoved(id);
}
catch (Throwable x) {
Protocol.log("Unhandled exception in Locator listener", x);
}
}
}
else if (name.equals("peerHeartBeat")) {
assert args.length == 1;
String id = (String)args[0];
IPeer peer = peers.get(id);
if (peer == null) return;
for (LocatorListener l : listeners.toArray(new LocatorListener[listeners.size()])) {
try {
l.peerHeartBeat(id);
}
catch (Throwable x) {
Protocol.log("Unhandled exception in Locator listener", x);
}
}
}
else {
throw new IOException("Locator service: unknown event: " + name);
}
}
catch (Throwable x) {
channel.terminate(x);
}
}
};
public LocatorProxy(IChannel channel) {
this.channel = channel;
channel.addEventListener(this, event_listener);
}
public String getName() {
return NAME;
}
public Map<String,IPeer> getPeers() {
return peers;
}
public IToken redirect(String peer_id, final DoneRedirect done) {
return new Command(channel, this, "redirect", new Object[]{ peer_id }) {
@Override
public void done(Exception error, Object[] args) {
if (error == null) {
assert args.length == 1;
error = toError(args[0]);
}
done.doneRedirect(token, error);
}
}.token;
}
public IToken redirect(Map<String,String> peer, final DoneRedirect done) {
return new Command(channel, this, "redirect", new Object[]{ peer }) {
@Override
public void done(Exception error, Object[] args) {
if (error == null) {
assert args.length == 1;
error = toError(args[0]);
}
done.doneRedirect(token, error);
}
}.token;
}
public IToken sync(final DoneSync done) {
return new Command(channel, this, "sync", null) {
@Override
public void done(Exception error, Object[] args) {
if (error != null) channel.terminate(error);
done.doneSync(token);
}
}.token;
}
public void addListener(LocatorListener listener) {
listeners.add(listener);
if (!get_peers_done) {
new Command(channel, this, "getPeers", null) {
@SuppressWarnings("unchecked")
@Override
public void done(Exception error, Object[] args) {
if (error == null) {
assert args.length == 2;
error = toError(args[0]);
}
if (error != null) {
Protocol.log("Locator error", error);
return;
}
Collection<?> c = (Collection<?>)args[1];
if (c != null) {
for (Object o : c) {
Map<String,String> m = (Map<String,String>)o;
String id = m.get(IPeer.ATTR_ID);
if (peers.get(id) != null) continue;
IPeer peer = new Peer(channel.getRemotePeer(), m);
peers.put(id, peer);
for (LocatorListener l : listeners.toArray(new LocatorListener[listeners.size()])) {
try {
l.peerAdded(peer);
}
catch (Throwable x) {
Protocol.log("Unhandled exception in Locator listener", x);
}
}
}
}
}
};
get_peers_done = true;
}
}
public void removeListener(LocatorListener listener) {
listeners.remove(listener);
}
}
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