/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.clustering.service.concurrent;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.function.Function;
import java.util.function.Supplier;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.ServiceTarget;
import org.jboss.threads.JBossExecutors;
import org.wildfly.clustering.service.AsynchronousServiceBuilder;
import org.wildfly.clustering.service.Builder;
import org.wildfly.clustering.service.SuppliedValueService;
/**
* Service that provides a {@link ScheduledThreadPoolExecutor} that removes tasks from the task queue upon cancellation.
* @author Paul Ferraro
*/
public class RemoveOnCancelScheduledExecutorServiceBuilder implements Builder<ScheduledExecutorService> {
private final ServiceName name;
private final ThreadFactory factory;
private volatile int size = 1;
public RemoveOnCancelScheduledExecutorServiceBuilder(ServiceName name, ThreadFactory factory) {
this.name = name;
this.factory = factory;
}
@Override
public ServiceName getServiceName() {
return this.name;
}
@Override
public ServiceBuilder<ScheduledExecutorService> build(ServiceTarget target) {
Function<ScheduledExecutorService, ScheduledExecutorService> mapper = executor -> JBossExecutors.protectedScheduledExecutorService(executor);
Supplier<ScheduledExecutorService> supplier = () -> {
ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(this.size, this.factory);
executor.setRemoveOnCancelPolicy(true);
executor.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
return executor;
};
Service<ScheduledExecutorService> service = new SuppliedValueService<>(mapper, supplier, ScheduledExecutorService::shutdown);
return new AsynchronousServiceBuilder<>(this.name, service).startSynchronously().build(target).setInitialMode(ServiceController.Mode.ON_DEMAND);
}
public RemoveOnCancelScheduledExecutorServiceBuilder size(int size) {
this.size = size;
return this;
}
}