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/************************************************************************
*
* Copyright (C) 2010 - 2014
*
* [StateLessComponentRunWorker.java]
* JACPFX Project (https://github.com/JacpFX/JacpFX/)
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS IS"
* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*
*
************************************************************************/
package org.jacpfx.rcp.worker;
import javafx.event.Event;
import javafx.event.EventHandler;
import org.jacpfx.api.component.Perspective;
import org.jacpfx.api.component.StatelessCallabackComponent;
import org.jacpfx.api.component.SubComponent;
import org.jacpfx.api.message.Message;
import org.jacpfx.rcp.component.ASubComponent;
import org.jacpfx.rcp.context.JacpContextImpl;
import org.jacpfx.rcp.registry.PerspectiveRegistry;
import org.jacpfx.rcp.util.TearDownHandler;
import org.jacpfx.rcp.util.WorkerUtil;
import java.util.concurrent.ExecutionException;
/**
* CallbackComponent worker to run instances of a stateless component in a worker
* thread.
*
* @author Andy Moncsek
*
*/
public class StateLessComponentRunWorker
extends
AComponentWorker, Event, Object>> {
private final SubComponent, Event, Object> component;
private final StatelessCallabackComponent, Event, Object> parent;
public StateLessComponentRunWorker(
final SubComponent, Event, Object> component,
final StatelessCallabackComponent, Event, Object> parent) {
this.component = component;
this.parent = parent;
}
@Override
protected SubComponent, Event, Object> call()
throws Exception {
try {
this.component.lock();
if(!component.getContext().isActive())runCallbackOnStartMethods(this.component);
while (this.component.hasIncomingMessage()) {
final Message myAction = this.component
.getNextIncomingMessage();
final JacpContextImpl context = JacpContextImpl.class.cast(this.component.getContext());
context.setActive(true);
context.setReturnTarget(myAction.getSourceId());
final Object value = this.component.getComponent().handle(myAction);
final String targetId = context
.getReturnTargetAndClear();
WorkerUtil.delegateReturnValue(this.component, targetId, value,
myAction);
}
} finally {
this.component.release();
}
return this.component;
}
@Override
protected void done() {
final Thread t = Thread.currentThread();
try {
final SubComponent, Event, Object> componentResult = this.get();
// check if component was deactivated and is still in instance list
if (!componentResult.getContext().isActive()) {
try{
componentResult.lock();
if(parent.getInstances().contains(componentResult))forceShutdown(componentResult, parent);
} finally {
componentResult.release();
}
}
} catch (final InterruptedException | ExecutionException e) {
t.getUncaughtExceptionHandler().uncaughtException(t,e);
}
}
/**
* Handle shutdown of component.
*
* @param component, the component to shutdown
* @param parent, the parent component
*/
private void forceShutdown(
final SubComponent, Event, Object> component,
final StatelessCallabackComponent, Event, Object> parent) {
final String parentId = parent.getParentId();
final Perspective, Event, Object> parentPerspctive = PerspectiveRegistry.findPerspectiveById(parentId);
if(parentPerspctive!=null)parentPerspctive.unregisterComponent(parent);
TearDownHandler.shutDownAsyncComponent(ASubComponent.class.cast(parent));
}
}
