xref: /openjdk10/test/failure_handler/src/share/classes/jdk/test/failurehandler/ElapsedTimePrinter.java

/*
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.test.failurehandler;

import java.io.PrintWriter;
import java.util.concurrent.TimeUnit;

public class ElapsedTimePrinter implements AutoCloseable {
    private final String name;
    private final PrintWriter out;
    private final Stopwatch stopwatch;

    public ElapsedTimePrinter(Stopwatch stopwatch, String name,
                              PrintWriter out) {
        this.stopwatch = stopwatch;
        this.name = name;
        this.out = out;
        stopwatch.start();
    }

    @Override
    public void close()  {
        stopwatch.stop();
        out.printf("%s took %d s%n", name,
                TimeUnit.NANOSECONDS.toSeconds(stopwatch.getElapsedTimeNs()));
    }
}