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/*
 * tksCommons
 *
 * Author  : Thomas Kuhlmann (ThK-Systems, http://www.thk-systems.de)
 * License : LGPL (https://www.gnu.org/licenses/lgpl.html)
 */
package de.thksystems.util.concurrent;

import java.util.concurrent.Callable;

/**
 * A {@link Callable} with the ability to set the thread name that is used while calling.
 */
public class NamedCallable implements Callable {

    private final Callable callable;
    private String threadName;

    protected NamedCallable(Callable callable) {
        this.callable = callable;
    }

    public static  NamedCallable of(Callable callable) {
        return new NamedCallable<>(callable);
    }

    @Override
    public V call() throws Exception {
        String oldThreadName = Thread.currentThread().getName();
        try {
            Thread.currentThread().setName(threadName.replace("{thread-id}", String.valueOf(Thread.currentThread().getId())));
            return callable.call();
        } finally {
            Thread.currentThread().setName(oldThreadName);
        }
    }

    /**
     * Sets the thread name.
     * 
     * If the thread name may contains "{thread-id}", it will be substituted with the id of the thread.
     */
    public NamedCallable withThreadName(String threadName) {
        this.threadName = threadName;
        return this;
    }

}