1/*
2 * Copyright (c) 2012, 2016, 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
24/*
25 * @test TestLogRotation.java
26 * @summary test flags for log rotation
27 * @library /test/lib
28 * @modules java.base/jdk.internal.misc
29 *          java.management
30 * @run main/othervm/timeout=600 TestLogRotation
31 *
32 */
33import jdk.test.lib.process.ProcessTools;
34import java.io.File;
35import java.io.FilenameFilter;
36import java.util.ArrayList;
37import java.util.Arrays;
38
39class GCLoggingGenerator {
40
41    public static void main(String[] args) throws Exception {
42
43        long sizeOfLog = Long.parseLong(args[0]);
44        long lines = sizeOfLog / 70;
45        // full.GC generates ad least 1-line which is not shorter then 70 chars
46        // for some GC 2 shorter lines are generated
47        for (long i = 0; i < lines; i++) {
48            System.gc();
49        }
50    }
51}
52
53public class TestLogRotation {
54
55    static final File currentDirectory = new File(".");
56    static final String logFileName = "test.log";
57    static final int logFileSizeK = 16;
58    static FilenameFilter logFilter = new FilenameFilter() {
59        @Override
60        public boolean accept(File dir, String name) {
61            return name.startsWith(logFileName);
62        }
63    };
64
65    public static void cleanLogs() {
66        for (File log : currentDirectory.listFiles(logFilter)) {
67            if (!log.delete()) {
68                throw new Error("Unable to delete " + log.getAbsolutePath());
69            }
70        }
71    }
72
73    public static void runTest(int numberOfFiles) throws Exception {
74
75        ArrayList<String> args = new ArrayList();
76        String[] logOpts = new String[]{
77            "-cp", System.getProperty("java.class.path"),
78            "-Xlog:gc=debug:" + logFileName + "::filesize=" + logFileSizeK + "k,filecount=" + numberOfFiles,
79            "-XX:-DisableExplicitGC", // to ensure that System.gc() works
80            "-Xmx128M"};
81        // System.getProperty("test.java.opts") is '' if no options is set
82        // need to skip such empty
83        String[] externalVMopts = System.getProperty("test.java.opts").length() == 0
84                ? new String[0]
85                : System.getProperty("test.java.opts").split(" ");
86        args.addAll(Arrays.asList(externalVMopts));
87        args.addAll(Arrays.asList(logOpts));
88        args.add(GCLoggingGenerator.class.getName());
89        args.add(String.valueOf(numberOfFiles * logFileSizeK * 1024));
90        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
91        pb.redirectErrorStream(true);
92        pb.redirectOutput(new File(GCLoggingGenerator.class.getName() + ".log"));
93        Process process = pb.start();
94        int result = process.waitFor();
95        if (result != 0) {
96            throw new Error("Unexpected exit code = " + result);
97        }
98        File[] logs = currentDirectory.listFiles(logFilter);
99        int smallFilesNumber = 0;
100        for (File log : logs) {
101            if (log.length() < logFileSizeK * 1024) {
102                smallFilesNumber++;
103            }
104        }
105        // Expect one more log file since the number-of-files doesn't include the active log file
106        int expectedNumberOfFiles = numberOfFiles + 1;
107        if (logs.length != expectedNumberOfFiles) {
108            throw new Error("There are " + logs.length + " logs instead of the expected " + expectedNumberOfFiles);
109        }
110        if (smallFilesNumber > 1) {
111            throw new Error("There should maximum one log with size < " + logFileSizeK + "K");
112        }
113    }
114
115    public static void main(String[] args) throws Exception {
116        cleanLogs();
117        runTest(1);
118        cleanLogs();
119        runTest(3);
120        cleanLogs();
121    }
122}
123