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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.jboss.threads;

import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.jboss.threads.management.ThreadPoolExecutorMBean;

public final class JBossScheduledThreadPoolExecutor extends ScheduledThreadPoolExecutor implements ThreadPoolExecutorMBean, ShutdownListenable {

    private final SimpleShutdownListenable shutdownListenable = new SimpleShutdownListenable();
    private final AtomicInteger rejectCount = new AtomicInteger();

    public JBossScheduledThreadPoolExecutor(int corePoolSize) {
        super(corePoolSize);
        setRejectedExecutionHandler(super.getRejectedExecutionHandler());
    }

    public JBossScheduledThreadPoolExecutor(int corePoolSize, ThreadFactory threadFactory) {
        super(corePoolSize, threadFactory);
        setRejectedExecutionHandler(super.getRejectedExecutionHandler());
    }

    public JBossScheduledThreadPoolExecutor(int corePoolSize, RejectedExecutionHandler handler) {
        super(corePoolSize);
        setRejectedExecutionHandler(handler);
    }

    public JBossScheduledThreadPoolExecutor(int corePoolSize, ThreadFactory threadFactory, RejectedExecutionHandler handler) {
        super(corePoolSize, threadFactory);
        setRejectedExecutionHandler(handler);
    }

    public long getKeepAliveTime() {
        return getKeepAliveTime(TimeUnit.MILLISECONDS);
    }

    public void setKeepAliveTime(final long milliseconds) {
        super.setKeepAliveTime(milliseconds, TimeUnit.MILLISECONDS);
        super.allowCoreThreadTimeOut(milliseconds < Long.MAX_VALUE);
    }

    public void setKeepAliveTime(final long time, final TimeUnit unit) {
        super.setKeepAliveTime(time, unit);
        super.allowCoreThreadTimeOut(time < Long.MAX_VALUE);
    }

    public int getRejectedCount() {
        return rejectCount.get();
    }

    public int getCurrentThreadCount() {
        return getActiveCount();
    }

    public int getLargestThreadCount() {
        return getLargestPoolSize();
    }

    public int getMaxThreads() {
        return getCorePoolSize();
    }

    public void setMaxThreads(final int newSize) {
        setCorePoolSize(newSize);
    }

    public RejectedExecutionHandler getRejectedExecutionHandler() {
        return ((CountingRejectHandler)super.getRejectedExecutionHandler()).getDelegate();
    }

    public void setRejectedExecutionHandler(final RejectedExecutionHandler handler) {
        super.setRejectedExecutionHandler(new CountingRejectHandler(handler));
    }

    /** {@inheritDoc} */
    public int getQueueSize() {
        return this.getQueue().size();
    }

    /** {@inheritDoc} */
    public  void addShutdownListener(final EventListener shutdownListener, final A attachment) {
        shutdownListenable.addShutdownListener(shutdownListener, attachment);
    }

    protected void terminated() {
        shutdownListenable.shutdown();
    }

    private final class CountingRejectHandler implements RejectedExecutionHandler {
        private final RejectedExecutionHandler delegate;

        public CountingRejectHandler(final RejectedExecutionHandler delegate) {
            this.delegate = delegate;
        }

        public RejectedExecutionHandler getDelegate() {
            return delegate;
        }

        public void rejectedExecution(final Runnable r, final ThreadPoolExecutor executor) {
            rejectCount.incrementAndGet();
            if (isShutdown()) {
                throw Messages.msg.shutDownInitiated();
            }
            delegate.rejectedExecution(r, executor);
        }
    }
}

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