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/*******************************************************************************
* Copyright (c) 2014 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.tcf.te.tcf.core.internal.channelmanager.steps;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.tcf.protocol.IChannel;
import org.eclipse.tcf.protocol.IPeer;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.runtime.events.EventManager;
import org.eclipse.tcf.te.runtime.interfaces.callback.ICallback;
import org.eclipse.tcf.te.runtime.interfaces.properties.IPropertiesContainer;
import org.eclipse.tcf.te.runtime.properties.PropertiesContainer;
import org.eclipse.tcf.te.runtime.stepper.StepperAttributeUtil;
import org.eclipse.tcf.te.runtime.stepper.interfaces.IFullQualifiedId;
import org.eclipse.tcf.te.runtime.stepper.interfaces.IStepContext;
import org.eclipse.tcf.te.runtime.utils.StatusHelper;
import org.eclipse.tcf.te.tcf.core.channelmanager.OpenChannelException;
import org.eclipse.tcf.te.tcf.core.events.ChannelEvent;
import org.eclipse.tcf.te.tcf.core.interfaces.steps.ITcfStepAttributes;
import org.eclipse.tcf.te.tcf.core.steps.AbstractPeerStep;
/**
* ChainPeerStep
*/
public class ChainPeerStep extends AbstractPeerStep {
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.interfaces.IStep#validateExecute(org.eclipse.tcf.te.runtime.stepper.interfaces.IStepContext, org.eclipse.tcf.te.runtime.interfaces.properties.IPropertiesContainer, org.eclipse.tcf.te.runtime.stepper.interfaces.IFullQualifiedId, org.eclipse.core.runtime.IProgressMonitor)
*/
@Override
public void validateExecute(IStepContext context, IPropertiesContainer data, IFullQualifiedId fullQualifiedId, IProgressMonitor monitor) throws CoreException {
Assert.isNotNull(context);
Assert.isNotNull(data);
Assert.isNotNull(fullQualifiedId);
Assert.isNotNull(monitor);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.interfaces.IStep#execute(org.eclipse.tcf.te.runtime.stepper.interfaces.IStepContext, org.eclipse.tcf.te.runtime.interfaces.properties.IPropertiesContainer, org.eclipse.tcf.te.runtime.stepper.interfaces.IFullQualifiedId, org.eclipse.core.runtime.IProgressMonitor, org.eclipse.tcf.te.runtime.interfaces.callback.ICallback)
*/
@Override
public void execute(IStepContext context, final IPropertiesContainer data, final IFullQualifiedId fullQualifiedId, IProgressMonitor monitor, final ICallback callback) {
Assert.isNotNull(context);
Assert.isNotNull(data);
Assert.isNotNull(fullQualifiedId);
Assert.isNotNull(monitor);
Assert.isNotNull(callback);
final AtomicReference<IChannel> channel = new AtomicReference<IChannel>((IChannel)StepperAttributeUtil.getProperty(ITcfStepAttributes.ATTR_CHANNEL, fullQualifiedId, data));
final IPeer peer = getActivePeerContext(context, data, fullQualifiedId);
final String logname = StepperAttributeUtil.getStringProperty(ITcfStepAttributes.ATTR_LOG_NAME, fullQualifiedId, data);
Runnable runnable = new Runnable() {
@Override
public void run() {
IChannel c = channel.get();
// If the channel is not yet opened, open it now.
// Otherwise redirect the channel to the next peer.
if (c == null) {
c = peer.openChannel();
channel.set(c);
String message = "to " + peer.getID(); //$NON-NLS-1$
IPropertiesContainer eventData = new PropertiesContainer();
eventData.setProperty(ChannelEvent.PROP_MESSAGE, message);
eventData.setProperty(ChannelEvent.PROP_LOG_NAME, logname);
ChannelEvent event = new ChannelEvent(ChainPeerStep.this, c, ChannelEvent.TYPE_OPENING, eventData);
EventManager.getInstance().fireEvent(event);
} else {
String message = c.getRemotePeer().getID() + " --> " + peer.getID(); //$NON-NLS-1$
IPropertiesContainer eventData = new PropertiesContainer();
eventData.setProperty(ChannelEvent.PROP_MESSAGE, message);
eventData.setProperty(ChannelEvent.PROP_LOG_NAME, logname);
ChannelEvent event = new ChannelEvent(ChainPeerStep.this, c, ChannelEvent.TYPE_REDIRECT, eventData);
EventManager.getInstance().fireEvent(event);
c.redirect(peer.getAttributes());
}
// At this point, channel must not be null and
// channel.get and c must be the same
Assert.isNotNull(c);
Assert.isTrue(c.equals(channel.get()));
c.addChannelListener(new IChannel.IChannelListener() {
@Override
public void onChannelOpened() {
channel.get().removeChannelListener(this);
StepperAttributeUtil.setProperty(ITcfStepAttributes.ATTR_CHANNEL, fullQualifiedId, data, channel.get(), true);
callback(data, fullQualifiedId, callback, Status.OK_STATUS, null);
}
@Override
public void onChannelClosed(Throwable error) {
// Remove ourself as listener from the channel
channel.get().removeChannelListener(this);
// The error is repackaged
if (error != null) {
error = new OpenChannelException(error);
}
// Invoke the callback
callback(data, fullQualifiedId, callback, StatusHelper.getStatus(error), null);
}
@Override
public void congestionLevel(int level) {
}
});
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeLater(runnable);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.steps.AbstractStep#rollback(org.eclipse.tcf.te.runtime.stepper.interfaces.IStepContext, org.eclipse.tcf.te.runtime.interfaces.properties.IPropertiesContainer, org.eclipse.core.runtime.IStatus, org.eclipse.tcf.te.runtime.stepper.interfaces.IFullQualifiedId, org.eclipse.core.runtime.IProgressMonitor, org.eclipse.tcf.te.runtime.interfaces.callback.ICallback)
*/
@Override
public void rollback(final IStepContext context, final IPropertiesContainer data, final IStatus status, final IFullQualifiedId fullQualifiedId, final IProgressMonitor monitor, final ICallback callback) {
final IChannel channel = (IChannel)StepperAttributeUtil.getProperty(ITcfStepAttributes.ATTR_CHANNEL, fullQualifiedId, data);
if (channel != null && channel.getState() != IChannel.STATE_CLOSED) {
Runnable runnable = new Runnable() {
@SuppressWarnings("synthetic-access")
@Override
public void run() {
channel.close();
ChainPeerStep.super.rollback(context, data, status, fullQualifiedId, monitor, callback);
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeLater(runnable);
} else {
super.rollback(context, data, status, fullQualifiedId, monitor, callback);
}
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.steps.AbstractStep#getCancelTimeout()
*/
@Override
public int getCancelTimeout() {
return 500;
}
}
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