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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 com.alipay.sofa.common.thread;

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

/**
 * @author qilong.zql
 * @author ruoshan
 * @since 2.6.0
 */
public class NamedThreadFactory implements ThreadFactory {

    static final AtomicInteger poolNumber   = new AtomicInteger(1);
    final AtomicInteger        threadNumber = new AtomicInteger(1);
    final ThreadGroup          group;
    final String               namePrefix;
    final boolean              isDaemon;

    public NamedThreadFactory(String name) {
        this(name, false);
    }

    public NamedThreadFactory(String prefix, boolean daemon) {
        SecurityManager s = System.getSecurityManager();
        group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
        namePrefix = prefix + "-" + poolNumber.getAndIncrement() + "-thread-";
        isDaemon = daemon;
    }

    public Thread newThread(Runnable r) {
        Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
        t.setDaemon(isDaemon);
        if (t.getPriority() != Thread.NORM_PRIORITY) {
            t.setPriority(Thread.NORM_PRIORITY);
        }
        return t;
    }
}