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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:
 *
 *   https://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.ObjectUtil;
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;
    protected final ThreadGroup threadGroup;

    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);
    }

    public static String toPoolName(Class poolType) {
        ObjectUtil.checkNotNull(poolType, "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, ThreadGroup threadGroup) {
        ObjectUtil.checkNotNull(poolName, "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;
        this.threadGroup = threadGroup;
    }

    public DefaultThreadFactory(String poolName, boolean daemon, int priority) {
        this(poolName, daemon, priority, null);
    }

    @Override
    public Thread newThread(Runnable r) {
        Thread t = newThread(FastThreadLocalRunnable.wrap(r), prefix + nextId.incrementAndGet());
        try {
            if (t.isDaemon() != daemon) {
                t.setDaemon(daemon);
            }

            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(threadGroup, r, name);
    }
}