org.apache.log4j.helpers: public class: LogLog

org.apache.log4j.helpers
public class: LogLog [javadoc | source]

java.lang.Object
   org.apache.log4j.helpers.LogLog

This class used to output log statements from within the log4j package.

Log4j components cannot make log4j logging calls. However, it is sometimes useful for the user to learn about what log4j is doing. You can enable log4j internal logging by defining the log4j.configDebug variable.

All log4j internal debug calls go to System.out where as internal error messages are sent to System.err. All internal messages are prepended with the string "log4j: ".

since: 0.8.2 -

author: Ceki - Gülcü

Field Summary

Field Summary
public static final String	DEBUG_KEY	Defining this value makes log4j print log4j-internal debug statements to `System.out`. The value of this string is log4j.debug. Note that the search for all option names is case sensitive.
public static final String	CONFIG_DEBUG_KEY	Defining this value makes log4j components print log4j-internal debug statements to `System.out`. The value of this string is log4j.configDebug. Note that the search for all option names is case sensitive.
protected static boolean	debugEnabled

public static final String

DEBUG_KEY

Defining this value makes log4j print log4j-internal debug statements to System.out.

The value of this string is log4j.debug.

Note that the search for all option names is case sensitive.

public static final String

CONFIG_DEBUG_KEY

Defining this value makes log4j components print log4j-internal debug statements to System.out.

The value of this string is log4j.configDebug.

Note that the search for all option names is case sensitive.

protected static boolean debugEnabled

Method from org.apache.log4j.helpers.LogLog Summary:
debug, debug, error, error, setInternalDebugging, setQuietMode, warn, warn

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.apache.log4j.helpers.LogLog Detail:
public static void debug(String msg) { if(debugEnabled && !quietMode) { System.out.println(PREFIX+msg); } } This method is used to output log4j internal debug statements. Output goes to `System.out`.
public static void debug(String msg, Throwable t) { if(debugEnabled && !quietMode) { System.out.println(PREFIX+msg); if(t != null) t.printStackTrace(System.out); } } This method is used to output log4j internal debug statements. Output goes to `System.out`.
public static void error(String msg) { if(quietMode) return; System.err.println(ERR_PREFIX+msg); } This method is used to output log4j internal error statements. There is no way to disable error statements. Output goes to `System.err`.
public static void error(String msg, Throwable t) { if(quietMode) return; System.err.println(ERR_PREFIX+msg); if(t != null) { t.printStackTrace(); } } This method is used to output log4j internal error statements. There is no way to disable error statements. Output goes to `System.err`.
public static void setInternalDebugging(boolean enabled) { String key = OptionConverter.getSystemProperty(DEBUG_KEY, null); if(key == null) { key = OptionConverter.getSystemProperty(CONFIG_DEBUG_KEY, null); } if(key != null) { debugEnabled = OptionConverter.toBoolean(key, true); } debugEnabled = enabled; } Allows to enable/disable log4j internal logging.
public static void setQuietMode(boolean quietMode) { LogLog.quietMode = quietMode; } In quite mode no LogLog generates strictly no output, not even for errors.
public static void warn(String msg) { if(quietMode) return; System.err.println(WARN_PREFIX+msg); } This method is used to output log4j internal warning statements. There is no way to disable warning statements. Output goes to `System.err`.
public static void warn(String msg, Throwable t) { if(quietMode) return; System.err.println(WARN_PREFIX+msg); if(t != null) { t.printStackTrace(); } } This method is used to output log4j internal warnings. There is no way to disable warning statements. Output goes to `System.err`.

Method from org.apache.log4j.helpers.LogLog Detail:

 public static  void debug(String msg) {
    if(debugEnabled && !quietMode) {
      System.out.println(PREFIX+msg);
    }
}

System.out

 public static  void debug(String msg,
    Throwable t) {
    if(debugEnabled && !quietMode) {
      System.out.println(PREFIX+msg);
      if(t != null)
	t.printStackTrace(System.out);
    }
}

System.out

 public static  void error(String msg) {
    if(quietMode)
      return;
    System.err.println(ERR_PREFIX+msg);
}

System.err

 public static  void error(String msg,
    Throwable t) {
    if(quietMode)
      return;
    System.err.println(ERR_PREFIX+msg);
    if(t != null) {
      t.printStackTrace();
    }
}

System.err

 public static  void setInternalDebugging(boolean enabled) {
   
    String key = OptionConverter.getSystemProperty(DEBUG_KEY, null);
    if(key == null) {
      key = OptionConverter.getSystemProperty(CONFIG_DEBUG_KEY, null);
    }
    if(key != null) { 
      debugEnabled = OptionConverter.toBoolean(key, true);
    }
    debugEnabled = enabled;
}

Allows to enable/disable log4j internal logging.

 public static  void setQuietMode(boolean quietMode) {
    LogLog.quietMode = quietMode;
}

In quite mode no LogLog generates strictly no output, not even for errors.

 public static  void warn(String msg) {
    if(quietMode)
      return;
    System.err.println(WARN_PREFIX+msg);
}

System.err

 public static  void warn(String msg,
    Throwable t) {
    if(quietMode)
      return;
    System.err.println(WARN_PREFIX+msg);
    if(t != null) {
      t.printStackTrace();
    }
}

System.err