0N/A/*
2362N/A * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A *
0N/A *
0N/A * Example class from java.lang.ThreadLocal class doc. Used by
0N/A * TestThreadId.java
0N/A */
0N/A
0N/A// Josh Bloch suggested this latest version after many inputs from other
0N/A// EG members and JUC list subscribers
0N/A
0N/Aimport java.util.concurrent.atomic.AtomicInteger;
0N/A
0N/Apublic class ThreadId {
0N/A // Atomic integer containing the next thread ID to be assigned
0N/A private static final AtomicInteger nextId = new AtomicInteger(0);
0N/A
0N/A // Thread local variable containing each thread's ID
0N/A private static final ThreadLocal<Integer> threadId =
0N/A new ThreadLocal<Integer>() {
0N/A @Override protected Integer initialValue() {
0N/A return nextId.getAndIncrement();
0N/A }
0N/A };
0N/A
0N/A // Returns the current thread's unique ID, assigning it if necessary
0N/A public static int get() {
0N/A return threadId.get();
0N/A }
0N/A}