001/*
002 * Copyright 2002-2008 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.core;
018
019import org.springframework.util.Assert;
020
021/**
022 * {@link ThreadLocal} subclass that exposes a specified name
023 * as {@link #toString()} result (allowing for introspection).
024 *
025 * @author Juergen Hoeller
026 * @since 2.5.2
027 * @see NamedInheritableThreadLocal
028 */
029public class NamedThreadLocal<T> extends ThreadLocal<T> {
030
031        private final String name;
032
033
034        /**
035         * Create a new NamedThreadLocal with the given name.
036         * @param name a descriptive name for this ThreadLocal
037         */
038        public NamedThreadLocal(String name) {
039                Assert.hasText(name, "Name must not be empty");
040                this.name = name;
041        }
042
043        @Override
044        public String toString() {
045                return this.name;
046        }
047
048}