RTCoverageDataPersister.java revision a921fd048da6858dc24d4370e3bba15fc9cc69ca 
1/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
2 *
3 * This program and the accompanying materials are made available under
4 * the terms of the Common Public License v1.0 which accompanies this distribution,
5 * and is available at http://www.eclipse.org/legal/cpl-v10.html
6 *
7 * $Id: RTCoverageDataPersister.java,v 1.1.2.2 2004/07/16 23:32:03 vlad_r Exp $
8 */
9package com.vladium.emma.rt;
10
11import java.io.File;
12
13import com.vladium.emma.IAppConstants;
14import com.vladium.emma.data.DataFactory;
15import com.vladium.emma.data.ICoverageData;
16import com.vladium.logging.Logger;
17
18// ----------------------------------------------------------------------------
19/**
20 * @author Vlad Roubtsov, (C) 2004
21 */
22abstract
23class RTCoverageDataPersister
24{
25    // public: ................................................................
26
27    // protected: .............................................................
28
29    // package: ...............................................................
30
31    /*
32     * Stateless package-private method shared by RT and RTExitHook for coverage
33     * data persistence. This method was moved out of RT class after build 4120
34     * in order to decrease classloading dependency set for RTExitHook
35     * (FR SF978671).
36     */
37    static void dumpCoverageData (final ICoverageData cdata, final boolean useSnapshot,
38                                  final File outFile, final boolean merge)
39    {
40        try
41        {
42            if (cdata != null)
43            {
44                // use method-scoped loggers everywhere in RT:
45                final Logger log = Logger.getLogger ();
46                final boolean info = log.atINFO ();
47
48                final long start = info ? System.currentTimeMillis () : 0;
49                {
50                    final ICoverageData cdataView = useSnapshot ? cdata.shallowCopy () : cdata;
51
52                    synchronized (Object.class) // fake a JVM-global critical section when multilply loaded RT's write to the same file
53                    {
54                        DataFactory.persist (cdataView, outFile, merge);
55                    }
56                }
57                if (info)
58                {
59                    final long end = System.currentTimeMillis ();
60
61                    log.info ("runtime coverage data " + (merge ? "merged into" : "written to") + " [" + outFile.getAbsolutePath () + "] {in " + (end - start) + " ms}");
62                }
63            }
64        }
65        catch (Throwable t)
66        {
67            // log
68            t.printStackTrace ();
69
70            // TODO: do better chaining in JRE 1.4+
71            throw new RuntimeException (IAppConstants.APP_NAME + " failed to dump coverage data: " + t.toString ());
72        }
73    }
74
75    // private: ...............................................................
76
77} // end of class
78// ----------------------------------------------------------------------------