Class NOPULogger

java.lang.Object
org.apache.log4j.component.spi.NOPULogger
All Implemented Interfaces:
ULogger
public final class NOPULogger extends Object implements ULogger
A no operation (NOP) implementation of ULogger.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final NOPULogger
    NOP_LOGGER
    The unique instance of NOPLogger.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    NOPULogger()
    There is no point in people creating multiple instances of NullLogger.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    debug(Object msg)
    Log a message object with the DEBUG level.
    void
    debug(Object parameterizedMsg, Object param1)
    Log a parameterized message object at the DEBUG level.
    void
    debug(Object msg, Throwable t)
    Log a message object with the DEBUG level including the stack trace of the Throwablet passed as parameter.
    void
    debug(String parameterizedMsg, Object param1, Object param2)
    Log a parameterized message object at the DEBUG level.
    void
    error(Object msg)
    Log a message object with the ERROR level.
    void
    error(Object parameterizedMsg, Object param1)
    Log a parameterized message object at the ERROR level.
    void
    error(Object msg, Throwable t)
    Log a message object with the ERROR level including the stack trace of the Throwablet passed as parameter.
    void
    error(String parameterizedMsg, Object param1, Object param2)
    Log a parameterized message object at the ERROR level.
    static NOPULogger
    getLogger(String name)
    Get instance.
    void
    info(Object msg)
    Log a message object with the INFO level.
    void
    info(Object parameterizedMsg, Object param1)
    Log a parameterized message object at the INFO level.
    void
    info(Object msg, Throwable t)
    Log a message object with the INFO level including the stack trace of the Throwablet passed as parameter.
    void
    info(String parameterizedMsg, Object param1, Object param2)
    Log a parameterized message object at the INFO level.
    boolean
    isDebugEnabled()
    Is the logger instance enabled for the DEBUG level?
    boolean
    isErrorEnabled()
    Is the logger instance enabled for the ERROR level?
    boolean
    isInfoEnabled()
    Is the logger instance enabled for the INFO level?
    boolean
    isWarnEnabled()
    Is the logger instance enabled for the WARN level?
    void
    warn(Object msg)
    Log a message object with the WARN level.
    void
    warn(Object parameterizedMsg, Object param1)
    Log a parameterized message object at the WARN level.
    void
    warn(Object msg, Throwable t)
    Log a message object with the WARN level including the stack trace of the Throwablet passed as parameter.
    void
    warn(String parameterizedMsg, Object param1, Object param2)
    Log a parameterized message object at the WARN level.

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • NOP_LOGGER

      public static final NOPULogger NOP_LOGGER
      The unique instance of NOPLogger.

  • Constructor Details

    • NOPULogger

      private NOPULogger()
      There is no point in people creating multiple instances of NullLogger. Hence, the private access modifier.

  • Method Details

    • getLogger

      public static NOPULogger getLogger(String name)
      Get instance.
      Parameters:
      name - logger name.
      Returns:
      logger.

    • isDebugEnabled

      public boolean isDebugEnabled()
      Is the logger instance enabled for the DEBUG level?
      Specified by:
      isDebugEnabled in interface ULogger
      Returns:
      true if debug is enabled.

    • debug

      public void debug(Object msg)
      Log a message object with the DEBUG level.
      Specified by:
      debug in interface ULogger
      Parameters:
      msg - - the message object to be logged

    • debug

      public void debug(Object parameterizedMsg, Object param1)
      Log a parameterized message object at the DEBUG level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      debug in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the parameter

    • debug

      public void debug(String parameterizedMsg, Object param1, Object param2)
      Log a parameterized message object at the DEBUG level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      debug in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the first parameter
      param2 - - the second parameter

    • debug

      public void debug(Object msg, Throwable t)
      Log a message object with the DEBUG level including the stack trace of the Throwablet passed as parameter.
      Specified by:
      debug in interface ULogger
      Parameters:
      msg - the message object to log.
      t - the exception to log, including its stack trace.

    • isInfoEnabled

      public boolean isInfoEnabled()
      Is the logger instance enabled for the INFO level?
      Specified by:
      isInfoEnabled in interface ULogger
      Returns:
      true if debug is enabled.

    • info

      public void info(Object msg)
      Log a message object with the INFO level.
      Specified by:
      info in interface ULogger
      Parameters:
      msg - - the message object to be logged

    • info

      public void info(Object parameterizedMsg, Object param1)
      Log a parameterized message object at the INFO level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      info in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the parameter

    • info

      public void info(String parameterizedMsg, Object param1, Object param2)
      Log a parameterized message object at the INFO level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      info in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the first parameter
      param2 - - the second parameter

    • info

      public void info(Object msg, Throwable t)
      Log a message object with the INFO level including the stack trace of the Throwablet passed as parameter.
      Specified by:
      info in interface ULogger
      Parameters:
      msg - the message object to log.
      t - the exception to log, including its stack trace.

    • isWarnEnabled

      public boolean isWarnEnabled()
      Is the logger instance enabled for the WARN level?
      Specified by:
      isWarnEnabled in interface ULogger
      Returns:
      true if debug is enabled.

    • warn

      public void warn(Object msg)
      Log a message object with the WARN level.
      Specified by:
      warn in interface ULogger
      Parameters:
      msg - - the message object to be logged

    • warn

      public void warn(Object parameterizedMsg, Object param1)
      Log a parameterized message object at the WARN level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      warn in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the parameter

    • warn

      public void warn(String parameterizedMsg, Object param1, Object param2)
      Log a parameterized message object at the WARN level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      warn in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the first parameter
      param2 - - the second parameter

    • warn

      public void warn(Object msg, Throwable t)
      Log a message object with the WARN level including the stack trace of the Throwablet passed as parameter.
      Specified by:
      warn in interface ULogger
      Parameters:
      msg - the message object to log.
      t - the exception to log, including its stack trace.

    • isErrorEnabled

      public boolean isErrorEnabled()
      Is the logger instance enabled for the ERROR level?
      Specified by:
      isErrorEnabled in interface ULogger
      Returns:
      true if debug is enabled.

    • error

      public void error(Object msg)
      Log a message object with the ERROR level.
      Specified by:
      error in interface ULogger
      Parameters:
      msg - - the message object to be logged

    • error

      public void error(Object parameterizedMsg, Object param1)
      Log a parameterized message object at the ERROR level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      error in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the parameter

    • error

      public void error(String parameterizedMsg, Object param1, Object param2)
      Log a parameterized message object at the ERROR level.

      This form is useful in avoiding the superflous object creation problem when invoking this method while it is disabled.

      Specified by:
      error in interface ULogger
      Parameters:
      parameterizedMsg - - the parameterized message object
      param1 - - the first parameter
      param2 - - the second parameter

    • error

      public void error(Object msg, Throwable t)
      Log a message object with the ERROR level including the stack trace of the Throwablet passed as parameter.
      Specified by:
      error in interface ULogger
      Parameters:
      msg - the message object to log.
      t - the exception to log, including its stack trace.