Package org.apache.tools.ant

# Interface BuildLogger

All Superinterfaces:
  `BuildListener`, `EventListener`

All Known Implementing Classes:
  `AnsiColorLogger`, `BigProjectLogger`, `CommonsLoggingListener`, `DefaultLogger`, `MailLogger`, `NoBannerLogger`, `ProfileLogger`, `RecorderEntry`, `SilentLogger`, `SimpleBigProjectLogger`, `TimestampedLogger`, `XmlLogger`

public interface BuildLogger extends BuildListener
Interface used by Ant to log the build output. A build logger is a build listener which has the 'right' to send output to the ant log, which is usually `System.out` unless redirected by the `-logfile` option.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `default int`
  `getMessageOutputLevel()`
  `void`
  `setEmacsMode(boolean emacsMode)`
  Sets this logger to produce emacs (and other editor) friendly output.
  `void`
  `setErrorPrintStream(PrintStream err)`
  Sets the output stream to which this logger is to send error messages.
  `void`
  `setMessageOutputLevel(int level)`
  Sets the highest level of message this logger should respond to.
  `void`
  `setOutputPrintStream(PrintStream output)`
  Sets the output stream to which this logger is to send its output.

  ### Methods inherited from interface org.apache.tools.ant.BuildListener

  `buildFinished, buildStarted, messageLogged, targetFinished, targetStarted, taskFinished, taskStarted`

- ## Method Details

  - ### setMessageOutputLevel

    void setMessageOutputLevel(int level)
    Sets the highest level of message this logger should respond to. Only messages with a message level lower than or equal to the given level should be written to the log.

    Constants for the message levels are in the `Project` class. The order of the levels, from least to most verbose, is `MSG_ERR`, `MSG_WARN`, `MSG_INFO`, `MSG_VERBOSE`, `MSG_DEBUG`.

    Parameters:
      `level` - the logging level for the logger.

  - ### getMessageOutputLevel

    default int getMessageOutputLevel()
    Returns:
      Returns the `currently set` message output level. The `default` implementation of this method returns `MSG_INFO`.
    Since:
      1.10.13

  - ### setOutputPrintStream

    void setOutputPrintStream(PrintStream output)
    Sets the output stream to which this logger is to send its output.
    Parameters:
      `output` - The output stream for the logger. Must not be `null`.

  - ### setEmacsMode

    void setEmacsMode(boolean emacsMode)
    Sets this logger to produce emacs (and other editor) friendly output.
    Parameters:
      `emacsMode` - `true` if output is to be unadorned so that emacs and other editors can parse files names, etc.

  - ### setErrorPrintStream

    void setErrorPrintStream(PrintStream err)
    Sets the output stream to which this logger is to send error messages.
    Parameters:
      `err` - The error stream for the logger. Must not be `null`.