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/************************************************************************
*
* Copyright (C) 2010 - 2014
*
* [TearDownHandler.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.util;
import javafx.event.Event;
import javafx.event.EventHandler;
import org.jacpfx.api.annotations.lifecycle.PreDestroy;
import org.jacpfx.api.component.Perspective;
import org.jacpfx.api.component.StatelessCallabackComponent;
import org.jacpfx.api.component.SubComponent;
import org.jacpfx.api.workbench.Base;
import org.jacpfx.rcp.component.AFXComponent;
import org.jacpfx.rcp.component.ASubComponent;
import org.jacpfx.rcp.component.CallbackComponent;
import org.jacpfx.rcp.registry.ComponentRegistry;
import org.jacpfx.rcp.worker.AComponentWorker;
import org.jacpfx.rcp.worker.TearDownWorker;
import java.util.*;
import java.util.concurrent.*;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Handles TearDown annotations on all components when application is closed.
*
* @author Andy Moncsek
*
*/
public class TearDownHandler {
private static Base, Event, Object> rootWorkbench;
private static final ExecutorService executor = Executors
.newCachedThreadPool(new HandlerThreadFactory(
"PerspectiveHandlerImpl:"));
/**
* Register the parent workbench, from here all perspectives and component
* should be reachable.
*
* @param rootWorkbench, the root workbench
*/
public static void registerBase(
Base, Event, Object> rootWorkbench) {
TearDownHandler.rootWorkbench = rootWorkbench;
}
/**
* perform global teardown on all components. This method will cause all @TearDown
* annotated methods to be executed.
*/
public static void handleGlobalTearDown() {
if (rootWorkbench == null)
throw new UnsupportedOperationException("can't teardown workbench");
final List, Event, Object>> perspectives = rootWorkbench
.getPerspectives();
if(perspectives==null) return;
for (final Perspective, Event, Object> perspective : perspectives) {
// TODO ... teardown perspective itself
final List, Event, Object>> subcomponents = perspective
.getSubcomponents();
if(subcomponents!=null) {
final List, Event, Object>> handleAsync = new ArrayList<>();
// TODO FIXME for teardow all parameters in PreDestroyed should be passed -- see init process
for (final SubComponent, Event, Object> component : subcomponents) {
if (CallbackComponent.class.isAssignableFrom(component.getClass())) {
handleAsync
.add(component);
}
else {
// run teardown in app thread
FXUtil.invokeHandleMethodsByAnnotation(PreDestroy.class,
component.getComponent());
}
}
if (!handleAsync.isEmpty())
handleAsyncTearDown(handleAsync);
}
FXUtil.invokeHandleMethodsByAnnotation(PreDestroy.class,
perspective.getPerspective());
}
executor.shutdown();
}
/**
* executes all methods in ICallbackComponent, annotated with @OnTeardown
* outside application thread.
*
* @param components, all components that should execute an async teardown
*/
@SafeVarargs
public static void handleAsyncTearDown(
SubComponent, Event, Object>... components) {
final List, Event, Object>> handleAsync = new ArrayList<>();
Collections.addAll(handleAsync, components);
handleAsyncTearDown(handleAsync);
}
/**
* executes all methods in ICallbackComponent, annotated with @OnTeardown
* outside application thread.
*
* @param components, all components that should execute an async teardown
*/
private static void handleAsyncTearDown(
final List, Event, Object>> components) {
try {
final Set> set = new HashSet<>();
for (final SubComponent, Event, Object> component : components) {
if(component instanceof StatelessCallabackComponent){
final StatelessCallabackComponent, Event, Object> tmp = (StatelessCallabackComponent, Event, Object>) component;
final List, Event, Object>> instances = tmp.getInstances();
for(final SubComponent, Event, Object> instance : instances) {
set.add(executor.submit(new TearDownWorker(instance)));
}
}
set.add(executor.submit(new TearDownWorker(component)));
}
awaitTermination(set);
} catch (RejectedExecutionException e) {
log("component teardown was not executed");
}
}
public static void shutDownFXComponent(final AFXComponent component, final Object ...params) {
// run teardown
FXUtil.invokeHandleMethodsByAnnotation(PreDestroy.class,
component.getComponent(), params);
component.interruptWorker();
component.initEnv(null, null);
ComponentRegistry.removeComponent(component);
}
private static void awaitTermination(Set> set) {
// await termination
for (final Future future : set) {
try {
future.get();
} catch (InterruptedException | ExecutionException e) {
log("error while handle TearDown");
e.printStackTrace();
}
}
}
public static void shutDownAsyncComponent(final ASubComponent component, final Object ...params) {
if(component instanceof StatelessCallabackComponent){
final Set> set = new HashSet<>();
final StatelessCallabackComponent, Event, Object> tmp = (StatelessCallabackComponent, Event, Object>) component;
final List, Event, Object>> instances = tmp.getInstances();
for(final SubComponent, Event, Object> instance : instances) {
if(instance.isStarted())
set.add(executor.submit(new TearDownWorker(instance)));
}
awaitTermination(set);
tmp.getExecutorService().shutdownNow();
instances.clear();
ComponentRegistry.removeComponent(component);
} else {
try {
executor.submit(new TearDownWorker(component)).get();
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
component.interruptWorker();
component.initEnv(null, null);
ComponentRegistry.removeComponent(component);
}
}
public static void executePredestroy(final SubComponent, Event, Object> component) {
FXUtil.invokeHandleMethodsByAnnotation(PreDestroy.class,
component.getComponent());
}
private static void log(final String message) {
if (Logger.getLogger(AComponentWorker.class.getName()).isLoggable(
Level.FINE)) {
Logger.getLogger(AComponentWorker.class.getName()).fine(
">> " + message);
}
}
}
