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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
* Martin Oberhuber (Wind River) - [269682] Get port from RSE Property
* Uwe Stieber (Wind River) - [271227] Fix compiler warnings in org.eclipse.tm.tcf.rse
* Anna Dushistova (MontaVista) - [285373] TCFConnectorService should send CommunicationsEvent.BEFORE_CONNECT and CommunicationsEvent.BEFORE_DISCONNECT
*******************************************************************************/
package org.eclipse.tm.internal.tcf.rse;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.rse.core.model.IHost;
import org.eclipse.rse.core.subsystems.BasicConnectorService;
import org.eclipse.rse.core.subsystems.CommunicationsEvent;
import org.eclipse.tm.tcf.core.AbstractPeer;
import org.eclipse.tm.tcf.protocol.IChannel;
import org.eclipse.tm.tcf.protocol.IPeer;
import org.eclipse.tm.tcf.protocol.IService;
import org.eclipse.tm.tcf.protocol.Protocol;
import org.eclipse.tm.tcf.services.IFileSystem;
import org.eclipse.tm.tcf.services.ILocator;
import org.eclipse.tm.tcf.services.ISysMonitor;
public class TCFConnectorService extends BasicConnectorService {
private IChannel channel;
private Throwable channel_error;
private final List<Runnable> wait_list = new ArrayList<Runnable>();
private boolean poll_timer_started;
public TCFConnectorService(IHost host, int port) {
super("TCF", "Target Communication Framework", host, port); //$NON-NLS-1$ //$NON-NLS-2$
}
@Override
protected void internalConnect(final IProgressMonitor monitor) throws Exception {
assert !Protocol.isDispatchThread();
final Exception[] res = new Exception[1];
// Fire comm event to signal state about to change
fireCommunicationsEvent(CommunicationsEvent.BEFORE_CONNECT);
monitor.beginTask("Connecting " + getHostName(), 1); //$NON-NLS-1$
synchronized (res) {
Protocol.invokeLater(new Runnable() {
public void run() {
if (!connectTCFChannel(res, monitor)) add_to_wait_list(this);
}
});
res.wait();
}
monitor.done();
if (res[0] != null) throw res[0];
}
@Override
protected void internalDisconnect(final IProgressMonitor monitor) throws Exception {
assert !Protocol.isDispatchThread();
final Exception[] res = new Exception[1];
// Fire comm event to signal state about to change
fireCommunicationsEvent(CommunicationsEvent.BEFORE_DISCONNECT);
monitor.beginTask("Disconnecting " + getHostName(), 1); //$NON-NLS-1$
synchronized (res) {
Protocol.invokeLater(new Runnable() {
public void run() {
if (!disconnectTCFChannel(res, monitor)) add_to_wait_list(this);
}
});
res.wait();
}
monitor.done();
if (res[0] != null) throw res[0];
}
public boolean isConnected() {
final boolean res[] = new boolean[1];
Protocol.invokeAndWait(new Runnable() {
public void run() {
res[0] = channel != null && channel.getState() == IChannel.STATE_OPEN;
}
});
return res[0];
}
private void add_to_wait_list(Runnable cb) {
wait_list.add(cb);
if (poll_timer_started) return;
Protocol.invokeLater(1000, new Runnable() {
public void run() {
poll_timer_started = false;
run_wait_list();
}
});
poll_timer_started = true;
}
private void run_wait_list() {
if (wait_list.isEmpty()) return;
Runnable[] r = wait_list.toArray(new Runnable[wait_list.size()]);
wait_list.clear();
for (int i = 0; i < r.length; i++) r[i].run();
}
private boolean connectTCFChannel(Exception[] res, IProgressMonitor monitor) {
if (channel != null) {
switch (channel.getState()) {
case IChannel.STATE_OPEN:
case IChannel.STATE_CLOSED:
synchronized (res) {
if (channel_error instanceof Exception) res[0] = (Exception)channel_error;
else if (channel_error != null) res[0] = new Exception(channel_error);
else res[0] = null;
res.notify();
return true;
}
}
}
if (monitor.isCanceled()) {
synchronized (res) {
res[0] = new Exception("Canceled"); //$NON-NLS-1$
if (channel != null) channel.terminate(res[0]);
res.notify();
return true;
}
}
if (channel == null) {
String host = getHostName().toLowerCase();
int port = getConnectPort();
if (port <= 0) {
//Default fallback
port = TCFConnectorServiceManager.TCF_PORT;
}
IPeer peer = null;
String port_str = Integer.toString(port);
ILocator locator = Protocol.getLocator();
for (IPeer p : locator.getPeers().values()) {
Map<String, String> attrs = p.getAttributes();
if ("TCP".equals(attrs.get(IPeer.ATTR_TRANSPORT_NAME)) && //$NON-NLS-1$
host.equalsIgnoreCase(attrs.get(IPeer.ATTR_IP_HOST)) &&
port_str.equals(attrs.get(IPeer.ATTR_IP_PORT))) {
peer = p;
break;
}
}
if (peer == null) {
Map<String, String> attrs = new HashMap<String, String>();
attrs.put(IPeer.ATTR_ID, "RSE:" + host + ":" + port_str); //$NON-NLS-1$ //$NON-NLS-2$
attrs.put(IPeer.ATTR_NAME, getName());
attrs.put(IPeer.ATTR_TRANSPORT_NAME, "TCP"); //$NON-NLS-1$
attrs.put(IPeer.ATTR_IP_HOST, host);
attrs.put(IPeer.ATTR_IP_PORT, port_str);
peer = new AbstractPeer(attrs);
}
channel = peer.openChannel();
channel.addChannelListener(new IChannel.IChannelListener() {
public void onChannelOpened() {
assert channel != null;
run_wait_list();
}
public void congestionLevel(int level) {
}
public void onChannelClosed(Throwable error) {
assert channel != null;
channel.removeChannelListener(this);
channel_error = error;
if (wait_list.isEmpty()) {
fireCommunicationsEvent(CommunicationsEvent.CONNECTION_ERROR);
}
else {
run_wait_list();
}
channel = null;
channel_error = null;
}
});
assert channel.getState() == IChannel.STATE_OPENING;
}
return false;
}
private boolean disconnectTCFChannel(Exception[] res, IProgressMonitor monitor) {
if (channel == null || channel.getState() == IChannel.STATE_CLOSED) {
synchronized (res) {
res[0] = null;
res.notify();
return true;
}
}
if (monitor.isCanceled()) {
synchronized (res) {
res[0] = new Exception("Canceled"); //$NON-NLS-1$
res.notify();
return true;
}
}
if (channel.getState() == IChannel.STATE_OPEN) channel.close();
return false;
}
public <V extends IService> V getService(Class<V> service_interface) {
if (channel == null || channel.getState() != IChannel.STATE_OPEN) throw new Error("Not connected"); //$NON-NLS-1$
V m = channel.getRemoteService(service_interface);
if (m == null) throw new Error("Remote peer does not support " + service_interface.getName() + " service"); //$NON-NLS-1$ //$NON-NLS-2$
return m;
}
public ISysMonitor getSysMonitorService() {
return getService(ISysMonitor.class);
}
public IFileSystem getFileSystemService() {
return getService(IFileSystem.class);
}
}
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