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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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/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project licenses this file to you 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 io.netty.util.concurrent;

import io.netty.util.internal.StringUtil;

import java.util.Locale;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * A {@link ThreadFactory} implementation with a simple naming rule.
 */
public class DefaultThreadFactory implements ThreadFactory {

    private static final AtomicInteger poolId = new AtomicInteger();

    private final AtomicInteger nextId = new AtomicInteger();
    private final String prefix;
    private final boolean daemon;
    private final int priority;

    public DefaultThreadFactory(Class poolType) {
        this(poolType, false, Thread.NORM_PRIORITY);
    }

    public DefaultThreadFactory(String poolName) {
        this(poolName, false, Thread.NORM_PRIORITY);
    }

    public DefaultThreadFactory(Class poolType, boolean daemon) {
        this(poolType, daemon, Thread.NORM_PRIORITY);
    }

    public DefaultThreadFactory(String poolName, boolean daemon) {
        this(poolName, daemon, Thread.NORM_PRIORITY);
    }

    public DefaultThreadFactory(Class poolType, int priority) {
        this(poolType, false, priority);
    }

    public DefaultThreadFactory(String poolName, int priority) {
        this(poolName, false, priority);
    }

    public DefaultThreadFactory(Class poolType, boolean daemon, int priority) {
        this(toPoolName(poolType), daemon, priority);
    }

    private static String toPoolName(Class poolType) {
        if (poolType == null) {
            throw new NullPointerException("poolType");
        }

        String poolName = StringUtil.simpleClassName(poolType);
        switch (poolName.length()) {
            case 0:
                return "unknown";
            case 1:
                return poolName.toLowerCase(Locale.US);
            default:
                if (Character.isUpperCase(poolName.charAt(0)) && Character.isLowerCase(poolName.charAt(1))) {
                    return Character.toLowerCase(poolName.charAt(0)) + poolName.substring(1);
                } else {
                    return poolName;
                }
        }
    }

    public DefaultThreadFactory(String poolName, boolean daemon, int priority) {
        if (poolName == null) {
            throw new NullPointerException("poolName");
        }
        if (priority < Thread.MIN_PRIORITY || priority > Thread.MAX_PRIORITY) {
            throw new IllegalArgumentException(
                    "priority: " + priority + " (expected: Thread.MIN_PRIORITY <= priority <= Thread.MAX_PRIORITY)");
        }

        prefix = poolName + '-' + poolId.incrementAndGet() + '-';
        this.daemon = daemon;
        this.priority = priority;
    }

    @Override
    public Thread newThread(Runnable r) {
        Thread t = newThread(new DefaultRunnableDecorator(r), prefix + nextId.incrementAndGet());
        try {
            if (t.isDaemon()) {
                if (!daemon) {
                    t.setDaemon(false);
                }
            } else {
                if (daemon) {
                    t.setDaemon(true);
                }
            }

            if (t.getPriority() != priority) {
                t.setPriority(priority);
            }
        } catch (Exception ignored) {
            // Doesn't matter even if failed to set.
        }
        return t;
    }

    protected Thread newThread(Runnable r, String name) {
        return new FastThreadLocalThread(r, name);
    }

    private static final class DefaultRunnableDecorator implements Runnable {

        private final Runnable r;

        DefaultRunnableDecorator(Runnable r) {
            this.r = r;
        }

        @Override
        public void run() {
            try {
                r.run();
            } finally {
                FastThreadLocal.removeAll();
            }
        }
    }
}