/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* 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.uberfire.backend.server.io;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.uberfire.commons.async.SimpleAsyncExecutorService;
import org.uberfire.commons.cluster.ClusterService;
import org.uberfire.commons.lifecycle.Disposable;
import org.uberfire.commons.lifecycle.PriorityDisposable;
import org.uberfire.commons.lifecycle.PriorityDisposableRegistry;
import org.uberfire.java.nio.file.api.FileSystemProviders;
import org.uberfire.java.nio.file.spi.FileSystemProvider;
public class DisposableShutdownService implements ServletContextListener {
@Override
public void contextInitialized(final ServletContextEvent sce) {
}
@Override
public void contextDestroyed(final ServletContextEvent sce) {
ClusterService clusterService = null;
final List<PriorityDisposable> disposables = new ArrayList<PriorityDisposable>(PriorityDisposableRegistry.getDisposables());
for (final PriorityDisposable disposable : disposables) {
if (disposable instanceof ClusterService) {
clusterService = (ClusterService) disposable;
}
}
if (clusterService != null) {
disposables.remove(clusterService);
clusterService.lock();
}
sort(disposables);
for (final PriorityDisposable disposable : disposables) {
disposable.dispose();
}
SimpleAsyncExecutorService.shutdownInstances();
for (final FileSystemProvider fileSystemProvider : FileSystemProviders.installedProviders()) {
if (fileSystemProvider instanceof Disposable) {
((Disposable) fileSystemProvider).dispose();
}
}
if (clusterService != null) {
clusterService.unlock();
clusterService.dispose();
}
PriorityDisposableRegistry.clear();
}
void sort(final List<PriorityDisposable> disposables) {
Collections.sort(disposables,
new Comparator<PriorityDisposable>() {
@Override
public int compare(final PriorityDisposable o1,
final PriorityDisposable o2) {
return (o2.priority() < o1.priority()) ? -1 : ((o2.priority() == o1.priority()) ? 0 : 1);
}
});
}
}