LogWrapperBase.java revision 608:7e06bf1dcb09 
1/*
2 * Copyright (c) 2003, 2004, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.corba.se.spi.logging ;
27
28import java.util.logging.Level ;
29import java.util.logging.Logger ;
30import java.util.logging.LogRecord ;
31
32public abstract class LogWrapperBase {
33    protected Logger logger ;
34
35    protected String loggerName ;
36
37    protected LogWrapperBase( Logger logger )
38    {
39        this.logger = logger ;
40        this.loggerName = logger.getName( );
41    }
42
43    protected void doLog( Level level, String key, Object[] params, Class wrapperClass,
44        Throwable thr )
45    {
46        LogRecord lrec = new LogRecord( level, key ) ;
47        if (params != null)
48            lrec.setParameters( params ) ;
49        inferCaller( wrapperClass, lrec ) ;
50        lrec.setThrown( thr ) ;
51        lrec.setLoggerName( loggerName );
52        lrec.setResourceBundle( logger.getResourceBundle() ) ;
53        logger.log( lrec ) ;
54    }
55
56    private void inferCaller( Class wrapperClass, LogRecord lrec )
57    {
58        // Private method to infer the caller's class and method names
59
60        // Get the stack trace.
61        StackTraceElement stack[] = (new Throwable()).getStackTrace();
62        StackTraceElement frame = null ;
63        String wcname = wrapperClass.getName() ;
64        String baseName = LogWrapperBase.class.getName() ;
65
66        // The top of the stack should always be a method in the wrapper class,
67        // or in this base class.
68        // Search back to the first method not in the wrapper class or this class.
69        int ix = 0;
70        while (ix < stack.length) {
71            frame = stack[ix];
72            String cname = frame.getClassName();
73            if (!cname.equals(wcname) && !cname.equals(baseName))  {
74                break;
75            }
76
77            ix++;
78        }
79
80        // Set the class and method if we are not past the end of the stack
81        // trace
82        if (ix < stack.length) {
83            lrec.setSourceClassName(frame.getClassName());
84            lrec.setSourceMethodName(frame.getMethodName());
85        }
86    }
87
88    protected void doLog( Level level, String key, Class wrapperClass, Throwable thr )
89    {
90        doLog( level, key, null, wrapperClass, thr ) ;
91    }
92}
93