/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.config.threadpool.util;

import static java.util.Objects.requireNonNull;

import java.io.Closeable;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Implementation of {@link ThreadFactory}. This class is thread-safe.
 */
public class NamingThreadPoolFactory implements ThreadFactory, Closeable {

    private final ThreadGroup group;
    private final String namePrefix;
    private final AtomicLong threadName = new AtomicLong();

    public NamingThreadPoolFactory(final String namePrefix) {
        this.namePrefix = requireNonNull(namePrefix);
        this.group = new ThreadGroup(namePrefix);
    }

    @Override
    @SuppressWarnings("checkstyle:parameterName")
    public Thread newThread(final Runnable r) {
        return new Thread(group, r, String.format("%s-%d", group.getName(), threadName.incrementAndGet()));
    }

    @Override
    public void close() {
    }

    public String getNamePrefix() {
        return namePrefix;
    }
}