Package org.apache.lucene.util

Class JavaLoggingInfoStream

java.lang.Object

org.apache.lucene.util.InfoStream

org.apache.lucene.util.JavaLoggingInfoStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class JavaLoggingInfoStream
extends InfoStream

InfoStream implementation that logs every message using Java Utils Logging (JUL) with the supplied log level.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary

Fields inherited from class org.apache.lucene.util.InfoStream

NO_OUTPUT

Constructor Summary

Constructors

Constructor	Description
JavaLoggingInfoStream(String namePrefix, Level level)	Gets an implementation that logs using the given log level and adds a prefix to the component name.
JavaLoggingInfoStream(Function<String,String> componentToLoggerName, Level level)	Gets an implementation that logs using the given log level with a logger name derived from the component name.
JavaLoggingInfoStream(Level level)	Gets an implementation using the given log level with a default prefix "org.apache.lucene.".

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	isEnabled(String component)	returns true if messages are enabled and should be posted to InfoStream.message(java.lang.String, java.lang.String).
void	message(String component, String message)	prints a message

Methods inherited from class org.apache.lucene.util.InfoStream

getDefault, setDefault

Methods inherited from class java.lang.Object

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

Constructor Details

JavaLoggingInfoStream

public JavaLoggingInfoStream(Level level)

Gets an implementation using the given log level with a default prefix "org.apache.lucene.".

Parameters:

level - Requested log level to be used while logging

JavaLoggingInfoStream

public JavaLoggingInfoStream(String namePrefix,
 Level level)

Gets an implementation that logs using the given log level and adds a prefix to the component name.

Parameters:

namePrefix - Prefix to be applied to all component names. It must be empty or include a final dot

level - Requested log level to be used while logging

JavaLoggingInfoStream

public JavaLoggingInfoStream(Function<String,String> componentToLoggerName,
 Level level)

Gets an implementation that logs using the given log level with a logger name derived from the component name.

Parameters:

componentToLoggerName - A function to convert a component name to a valid JUL logger name

level - Requested log level to be used while logging

Method Details

message

public void message(String component,
 String message)

Description copied from class: InfoStream

prints a message

Specified by:

message in class InfoStream

isEnabled

public boolean isEnabled(String component)

Description copied from class: InfoStream

returns true if messages are enabled and should be posted to InfoStream.message(java.lang.String, java.lang.String).

Specified by:

isEnabled in class InfoStream

close

public void close()