Find Usages Diff Raw Download HTML Widget
Start line:  
End line:  

Snippet Preview

Snippet HTML Code

Stack Overflow Questions 
1
  /* 
2
   * Copyright (c) 2004-2007 QOS.ch
3
   * All rights reserved.
4
   * 
5
   * Permission is hereby granted, free  of charge, to any person obtaining
6
   * a  copy  of this  software  and  associated  documentation files  (the
7
   * "Software"), to  deal in  the Software without  restriction, including
8
   * without limitation  the rights to  use, copy, modify,  merge, publish,
9
   * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10
  * permit persons to whom the Software  is furnished to do so, subject to
11
  * the following conditions:
12
  * 
13
  * The  above  copyright  notice  and  this permission  notice  shall  be
14
  * included in all copies or substantial portions of the Software.
15
  * 
16
  * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17
  * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18
  * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20
  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21
  * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23
  */
24
 
25
 package org.slf4j;
26
 
28
 import java.util.List;
29
 
The LoggerFactory is a utility class producing Loggers for various logging APIs, most notably for log4j, logback and JDK 1.4 logging. Other implementations such as NOPLogger and SimpleLogger are also supported.

LoggerFactory is essentially a wrapper around an ILoggerFactory instance bound with LoggerFactory at compile time.

Please note that all methods in LoggerFactory are static.

Author(s):
Ceki Gülcü
49
 
50
 public final class LoggerFactory {
51
 
53
 
54
   static final String NO_STATICLOGGERBINDER_URL = "http://www.slf4j.org/codes.html#StaticLoggerBinder";
55
   static final String NULL_LF_URL = "http://www.slf4j.org/codes.html#null_LF";
56
   static final String VERSION_MISMATCH = "http://www.slf4j.org/codes.html#version_mismatch";
57
   static final String SUBSTITUTE_LOGGER_URL = "http://www.slf4j.org/codes.html#substituteLogger";
58
 
59
   static private final String EXPECTED_VERSION = "1.5.4";
60
 
61
   // private constructor prevents instantiation
62
   private LoggerFactory() {
63
   }
64
 
65
   static {
66
     staticInitialize();
68
   }
69
 
70
   private final static void staticInitialize() {
71
     try {
72
       // support re-entrant behavior.
73
       // See also http://bugzilla.slf4j.org/show_bug.cgi?id=106
74
       List loggerNameList = new ArrayList();
75
        = new SubstituteLoggerFactory(loggerNameList);
77
       emitSubstitureLoggerWarning(loggerNameList);
78
     } catch (NoClassDefFoundError ncde) {
79
        = null; // undo SubstituteLoggerFactory assignment
80
       String msg = ncde.getMessage();
81
       if (msg != null && msg.indexOf("org/slf4j/impl/StaticLoggerBinder") != -1) {
82
         Util
83
             .reportFailure("Failed to load class \"org.slf4j.impl.StaticLoggerBinder\".");
84
         Util.reportFailure("See " + 
85
             + " for further details.");
86
 
87
       }
88
       throw ncde;
89
     } catch (Exception e) {
90
        = null; // undo SubstituteLoggerFactory assignment
91
       // we should never get here
92
       Util.reportFailure("Failed to instantiate logger ["
93
           + ..getLoggerFactoryClassStr() + "]", e);
94
     }
95
   }
96
 
97
   private final static void emitSubstitureLoggerWarning(List loggerNameList) {
98
     if(loggerNameList.size() == 0) {
99
       return;
100
    }
101
    Util
102
        .reportFailure("The following loggers will not work becasue they were created");
103
    Util
104
        .reportFailure("during the default configuration phase of the underlying logging system.");
105
    Util.reportFailure("See also " + );
106
    for (int i = 0; i < loggerNameList.size(); i++) {
107
      String loggerName = (String) loggerNameList.get(i);
108
      Util.reportFailure(loggerName);
109
    }
110
  }
112
  private final static void versionSanityCheck() {
113
    try {
114
      String actualVer = .;
115
      if (!.equals(actualVer)) {
116
        Util.reportFailure("The version " + actualVer
117
            + " of your slf4j-binding differs from " + 
118
            + ", the expected version.");
119
        Util.reportFailure("See " +  + " for further details.");
120
      }
121
    } catch (java.lang.NoSuchFieldError nsfe) {
122
      Util
123
          .reportFailure("The version of your slf4j-binding is probably older than 1.5.4, and differs from "
124
              +  + ", the expected version.");
125
      Util.reportFailure("See " +  + " for further details.");
126
    } catch (Throwable e) {
127
      Util
128
          .reportFailure("An unexpected problem occured while checking the version of your slf4j-binding");
129
      e.printStackTrace();
130
    }
131
  }

  
Return a logger named according to the name parameter using the statically bound ILoggerFactory instance.

Parameters:
name The name of the logger.
Returns:
logger
141
  public static Logger getLogger(String name) {
142
    if ( == null) {
143
      throw new IllegalStateException(
144
          "Logging factory implementation cannot be null. See also "
145
              + );
146
    }
147
    return .getLogger(name);
148
  }

  
Return a logger named corresponding to the class passed as parameter, using the statically bound ILoggerFactory instance.

Parameters:
clazz the returned logger will be named after clazz
Returns:
logger
158
  public static Logger getLogger(Class clazz) {
159
    if ( == null) {
160
      throw new IllegalStateException(
161
          "Logging factory implementation cannot be null. See also "
162
              + );
163
    }
164
    return .getLogger(clazz.getName());
165
  }

  
Return the ILoggerFactory instance in use.

ILoggerFactory instance is bound with this class at compile time.

Returns:
the ILoggerFactory instance in use
175
  public static ILoggerFactory getILoggerFactory() {
176
    return ;
177
  }
New to GrepCode? Check out our FAQ X