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`.