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/*******************************************************************************
* Copyright (c) 2012 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.processes.core.model;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.runtime.Assert;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;
import org.eclipse.tcf.te.tcf.processes.core.model.interfaces.runtime.IRuntimeModel;
import org.eclipse.tcf.te.tcf.processes.core.model.runtime.RuntimeModel;
/**
* Processes service model manager implementation.
*/
public class ModelManager {
// Reference to the runtime models
/* default */ static final Map<String, IRuntimeModel> runtimeModels = new HashMap<String, IRuntimeModel>();
/**
* Returns the runtime model instance for the given peer model
* <p>
* If not yet initialized, a new runtime model will be initialized before returning.
*
* @param peerModel The peer model instance. Must not be <code>null</code>.
* @return The runtime model.
*/
public static IRuntimeModel getRuntimeModel(final IPeerModel peerModel) {
Assert.isNotNull(peerModel);
// The result reference holder
final AtomicReference<IRuntimeModel> runtimeModel = new AtomicReference<IRuntimeModel>();
// Create the runnable to execute
Runnable runnable = new Runnable() {
@Override
public void run() {
Assert.isTrue(Protocol.isDispatchThread());
// Get the peer id
String id = peerModel.getPeerId();
// Lookup the runtime model instance
IRuntimeModel candidate = runtimeModels.get(id);
// Initialize a new runtime model instance if necessary
if (candidate == null) {
candidate = initializeRuntimeModel(peerModel);
if (candidate != null) runtimeModels.put(id, candidate);
}
// Store to the result reference holder
runtimeModel.set(candidate);
}
};
// Execute the runnable
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeAndWait(runnable);
return runtimeModel.get();
}
/**
* Initialize the runtime model.
* <p>
* Must be called within the TCF dispatch thread.
*
* @param peerModel The peer model instance. Must not be <code>null</code>.
* @return The runtime model.
*/
protected static IRuntimeModel initializeRuntimeModel(IPeerModel peerModel) {
Assert.isTrue(Protocol.isDispatchThread());
IRuntimeModel runtimeModel = new RuntimeModel(peerModel);
return runtimeModel;
}
/**
* Dispose the runtime model.
*
* @param peerModel The peer model instance. Must not be <code>null</code>.
*/
public static void disposeRuntimeModel(final IPeerModel peerModel) {
Assert.isNotNull(peerModel);
Runnable runnable = new Runnable() {
@Override
public void run() {
Assert.isTrue(Protocol.isDispatchThread());
// Get the peer id
String id = peerModel.getPeerId();
// Lookup the runtime model instance
IRuntimeModel candidate = runtimeModels.remove(id);
// Dispose it
if (candidate != null) candidate.dispose();
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeAndWait(runnable);
}
/**
* Dispose all runtime models.
*/
public static void disposeAllRuntimeModels() {
if (runtimeModels.isEmpty()) return;
final IRuntimeModel[] models = runtimeModels.values().toArray(new IRuntimeModel[runtimeModels.values().size()]);
runtimeModels.clear();
Runnable runnable = new Runnable() {
@Override
public void run() {
for (IRuntimeModel model : models) {
model.dispose();
}
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeAndWait(runnable);
}
}
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