org.springframework.core.NamedThreadLocal.java Source code

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Here is the source code for org.springframework.core.NamedThreadLocal.java

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/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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 org.springframework.core;

import org.springframework.util.Assert;

/**
 * {@link ThreadLocal} subclass that exposes a specified name
 * as {@link #toString()} result (allowing for introspection).
 *
 * @author Juergen Hoeller
 * @since 2.5.2
 * @param <T> the value type
 * @see NamedInheritableThreadLocal
 */
public class NamedThreadLocal<T> extends ThreadLocal<T> {

    private final String name;

    /**
     * Create a new NamedThreadLocal with the given name.
     * @param name a descriptive name for this ThreadLocal
     */
    public NamedThreadLocal(String name) {
        Assert.hasText(name, "Name must not be empty");
        this.name = name;
    }

    @Override
    public String toString() {
        return this.name;
    }

}