Package org.apache.logging.log4j.taglib

Class Log4jTaglibLoggerContext

java.lang.Object

org.apache.logging.log4j.taglib.Log4jTaglibLoggerContext

All Implemented Interfaces:

LoggerContext

final class Log4jTaglibLoggerContext
extends java.lang.Object
implements LoggerContext

This bridge between the tag library and the Log4j API ensures that instances of Log4jTaglibLogger are appropriately held in memory and not constantly recreated.

Since:

2.0

Field Summary

Fields

Modifier and Type	Field	Description
private static java.util.WeakHashMap<javax.servlet.ServletContext,Log4jTaglibLoggerContext>	CONTEXTS
private LoggerRegistry<Log4jTaglibLogger>	loggerRegistry
private javax.servlet.ServletContext	servletContext

Fields inherited from interface org.apache.logging.log4j.spi.LoggerContext

EMPTY_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Log4jTaglibLoggerContext(javax.servlet.ServletContext servletContext)

Method Summary

Modifier and Type	Method	Description
java.lang.Object	getExternalContext()	Gets the anchor for some other context, such as a ClassLoader or ServletContext.
(package private) static Log4jTaglibLoggerContext	getInstance(javax.servlet.ServletContext servletContext)
Log4jTaglibLogger	getLogger(java.lang.String name)	Gets an ExtendedLogger.
Log4jTaglibLogger	getLogger(java.lang.String name, MessageFactory messageFactory)	Gets an ExtendedLogger.
boolean	hasLogger(java.lang.String name)	Tests if a Logger with the specified name exists.
boolean	hasLogger(java.lang.String name, java.lang.Class<? extends MessageFactory> messageFactoryClass)	Tests if a Logger with the specified name and MessageFactory type exists.
boolean	hasLogger(java.lang.String name, MessageFactory messageFactory)	Tests if a Logger with the specified name and MessageFactory exists.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.logging.log4j.spi.LoggerContext

getLogger, getLogger, getLoggerRegistry, getObject, putObject, putObjectIfAbsent, removeObject, removeObject

Field Detail

CONTEXTS

private static final java.util.WeakHashMap<javax.servlet.ServletContext,Log4jTaglibLoggerContext> CONTEXTS

loggerRegistry

private final LoggerRegistry<Log4jTaglibLogger> loggerRegistry

servletContext

private final javax.servlet.ServletContext servletContext

Constructor Detail

Log4jTaglibLoggerContext

private Log4jTaglibLoggerContext(javax.servlet.ServletContext servletContext)

Method Detail

getExternalContext

public java.lang.Object getExternalContext()

Description copied from interface: LoggerContext

Gets the anchor for some other context, such as a ClassLoader or ServletContext.

Specified by:

getExternalContext in interface LoggerContext

Returns:

The external context.

getLogger

public Log4jTaglibLogger getLogger(java.lang.String name)

Description copied from interface: LoggerContext

Gets an ExtendedLogger.

Specified by:

getLogger in interface LoggerContext

Parameters:

name - The name of the Logger to return.

Returns:

The logger with the specified name.

getLogger

public Log4jTaglibLogger getLogger(java.lang.String name,
                                   MessageFactory messageFactory)

Description copied from interface: LoggerContext

Gets an ExtendedLogger.

Specified by:

getLogger in interface LoggerContext

Parameters:

name - The name of the Logger to return.

messageFactory - The message factory is used only when creating a logger, subsequent use does not change the logger but will log a warning if mismatched.

Returns:

The logger with the specified name.

hasLogger

public boolean hasLogger(java.lang.String name)

Description copied from interface: LoggerContext

Tests if a Logger with the specified name exists.

Specified by:

hasLogger in interface LoggerContext

Parameters:

name - The Logger name to search for.

Returns:

true if the Logger exists, false otherwise.

hasLogger

public boolean hasLogger(java.lang.String name,
                         MessageFactory messageFactory)

Description copied from interface: LoggerContext

Tests if a Logger with the specified name and MessageFactory exists.

Specified by:

hasLogger in interface LoggerContext

Parameters:

name - The Logger name to search for.

messageFactory - The message factory to search for.

Returns:

true if the Logger exists, false otherwise.

hasLogger

public boolean hasLogger(java.lang.String name,
                         java.lang.Class<? extends MessageFactory> messageFactoryClass)

Description copied from interface: LoggerContext

Tests if a Logger with the specified name and MessageFactory type exists.

Specified by:

hasLogger in interface LoggerContext

Parameters:

name - The Logger name to search for.

messageFactoryClass - The message factory class to search for.

Returns:

true if the Logger exists, false otherwise.

getInstance

static Log4jTaglibLoggerContext getInstance(javax.servlet.ServletContext servletContext)