Source Code : Utilities to manage thread ids

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Utilities to manage thread ids

 

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors 
 * as indicated by the @author tags. 
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors. 
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A 
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
 * MA  02110-1301, USA.
 * 
 * (C) 2005-2006,
 * @author JBoss Inc.
 */

/**
 * Provides utilities to manage thread ids.
 */
public class ThreadUtil {
  /**
   * The ID associated with the thread.
   */
  private static final ThreadLocal THREAD_ID = new ThreadLocal();

  /**
   * The thread id counter.
   */
  private static long id;

  /**
   * Get the string ID for the current thread.
   * 
   * @return The thread id
   */
  public static String getThreadId() {
    return getThreadId(Thread.currentThread());
  }

  /**
   * Get the string ID for the specified thread.
   * 
   * @param thread
   *          The thread.
   * @return The thread id
   */
  public static String getThreadId(final Thread thread) {
    final Object id = THREAD_ID.get();
    if (id != null) {
      return (String) id;
    }

    final String newId = getNextId();
    THREAD_ID.set(newId);
    return newId;
  }

  /**
   * Get the next thread id to use.
   * 
   * @return The next thread id.
   */
  private static synchronized String getNextId() {
    return "TSThread:" + Long.toHexString(++id);
  }
}

   
  

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