ElapsedTimePrinter.java revision 1870:4aa2e64eff30 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24package jdk.test.failurehandler;
25
26import java.io.PrintWriter;
27import java.util.concurrent.TimeUnit;
28
29public class ElapsedTimePrinter implements AutoCloseable {
30    private final String name;
31    private final PrintWriter out;
32    private final Stopwatch stopwatch;
33
34    public ElapsedTimePrinter(Stopwatch stopwatch, String name,
35                              PrintWriter out) {
36        this.stopwatch = stopwatch;
37        this.name = name;
38        this.out = out;
39        stopwatch.start();
40    }
41
42    @Override
43    public void close()  {
44        stopwatch.stop();
45        out.printf("%s took %d s%n", name,
46                TimeUnit.NANOSECONDS.toSeconds(stopwatch.getElapsedTimeNs()));
47    }
48}
49