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/*******************************************************************************
* Copyright (c) 2011 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.locator.nodes;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.runtime.Assert;
import org.eclipse.tcf.protocol.IPeer;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.runtime.model.ContainerModelNode;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.ILocatorModel;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModelProperties;
/**
* Default peer model implementation.
*/
public class PeerModel extends ContainerModelNode implements IPeerModel {
// Reference to the parent locator model
private final ILocatorModel model;
// Reference to the peer id (cached for performance optimization)
private String peerId;
/**
* Constructor.
*
* @param model The parent locator model. Must not be <code>null</code>.
* @param peer The peer. Must not be <code>null</code>.
*/
public PeerModel(ILocatorModel model, IPeer peer) {
super();
Assert.isNotNull(model);
this.model = model;
Assert.isNotNull(peer);
// Set the default properties before enabling the change events.
// The properties changed listeners should not be called from the
// constructor.
setProperty(IPeerModelProperties.PROP_INSTANCE, peer);
// Initialize the peer id
peerId = peer.getID();
Assert.isNotNull(peerId);
// Peer model nodes can change the node parent at any time
allowSetParentOnNonNullParent = true;
// Peer model nodes does not have a parent by default
// -> allow change events with null parent
suppressEventsOnNullParent = false;
// Enable change events
setChangeEventsEnabled(true);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.properties.PropertiesContainer#checkThreadAccess()
*/
@Override
protected final boolean checkThreadAccess() {
return Protocol.isDispatchThread();
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel#getModel()
*/
@Override
public ILocatorModel getModel() {
return (ILocatorModel)getAdapter(ILocatorModel.class);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel#getPeer()
*/
@Override
public IPeer getPeer() {
return (IPeer)getAdapter(IPeer.class);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel#getPeerId()
*/
@Override
public String getPeerId() {
return peerId;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel#isComplete()
*/
@Override
public boolean isComplete() {
Assert.isTrue(checkThreadAccess(), "Illegal Thread Access"); //$NON-NLS-1$
boolean complete = true;
// Determine the transport method
String transport = getPeer().getTransportName();
// If the transport is not set, the peer attributes are incomplete
if (transport == null) {
complete = false;
} else {
// For TCP or SSL transport, ATTR_IP_HOST must not be null.
String ip = getPeer().getAttributes().get(IPeer.ATTR_IP_HOST);
if (("TCP".equals(transport) || "SSL".equals(transport)) && ip == null) { //$NON-NLS-1$ //$NON-NLS-2$
complete = false;
}
// Pipe and Loop transport does not require additional attributes
}
return complete;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.PlatformObject#getAdapter(java.lang.Class)
*/
@Override
public Object getAdapter(final Class adapter) {
// NOTE: The getAdapter(...) method can be invoked from many place and
// many threads where we cannot control the calls. Therefore, this
// method is allowed be called from any thread.
final AtomicReference<Object> object = new AtomicReference<Object>();
Runnable runnable = new Runnable() {
@Override
public void run() {
object.set(doGetAdapter(adapter));
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeAndWait(runnable);
return object.get() != null ? object.get() : super.getAdapter(adapter);
}
/**
* Returns an object which is an instance of the given class associated with this object.
* Returns <code>null</code> if no such object can be found.
* <p>
* This method must be called within the TCF dispatch thread!
*
* @param adapter The adapter class to look up.
* @return The adapter or <code>null</code>.
*/
protected Object doGetAdapter(Class<?> adapter) {
Assert.isTrue(checkThreadAccess(), "Illegal Thread Access"); //$NON-NLS-1$
if (ILocatorModel.class.equals(adapter)) {
return model;
}
Object peer = getProperty(IPeerModelProperties.PROP_INSTANCE);
// Check with adapter.isAssignableFrom(...) to return the peer instance
// correctly if adapter is IPeer.class.
if (peer != null && adapter.isAssignableFrom(peer.getClass())) {
return peer;
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.properties.PropertiesContainer#toString()
*/
@Override
public String toString() {
final StringBuilder buffer = new StringBuilder(getClass().getSimpleName());
Runnable runnable = new Runnable() {
@Override
public void run() {
IPeer peer = getPeer();
buffer.append(": id=" + peer.getID()); //$NON-NLS-1$
buffer.append(", name=" + peer.getName()); //$NON-NLS-1$
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeAndWait(runnable);
buffer.append(", " + super.toString()); //$NON-NLS-1$
return buffer.toString();
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.properties.PropertiesContainer#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (obj instanceof PeerModel) {
return getPeerId().equals(((PeerModel)obj).getPeerId());
}
return super.equals(obj);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.properties.PropertiesContainer#hashCode()
*/
@Override
public int hashCode() {
return getPeerId().hashCode();
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.properties.PropertiesContainer#postSetProperties(java.util.Map)
*/
@Override
protected void postSetProperties(Map<String, ?> properties) {
Assert.isTrue(checkThreadAccess(), "Illegal Thread Access"); //$NON-NLS-1$
Assert.isNotNull(properties);
Assert.isNotNull(getPeer());
// New properties applied. Update the element id
peerId = getPeer().getID();
Assert.isNotNull(peerId);
super.postSetProperties(properties);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.properties.PropertiesContainer#postSetProperty(java.lang.String, java.lang.Object, java.lang.Object)
*/
@Override
public void postSetProperty(String key, Object value, Object oldValue) {
Assert.isTrue(checkThreadAccess(), "Illegal Thread Access"); //$NON-NLS-1$
Assert.isNotNull(key);
Assert.isNotNull(getPeer());
// If the peer instance changed, update the element id
if (IPeerModelProperties.PROP_INSTANCE.equals(key)) {
peerId = getPeer().getID();
Assert.isNotNull(peerId);
}
super.postSetProperty(key, value, oldValue);
}
}
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