Package org.jboss.logmanager

Class CallerClassLoaderLogContextSelector

java.lang.Object

org.jboss.logmanager.CallerClassLoaderLogContextSelector

All Implemented Interfaces:

LogContextSelector

public final class CallerClassLoaderLogContextSelector
extends Object
implements LogContextSelector

A log context selector which chooses a log context based on the caller's classloader. The first caller that is not a log API or does not have a null classloader will be the class loader used.

Constructor Summary

Constructors

Constructor	Description
CallerClassLoaderLogContextSelector()	Construct a new instance.
CallerClassLoaderLogContextSelector(boolean checkParentClassLoaders)	Construct a new instance.
CallerClassLoaderLogContextSelector(LogContextSelector defaultSelector)	Construct a new instance.
CallerClassLoaderLogContextSelector(LogContextSelector defaultSelector, boolean checkParentClassLoaders)	Construct a new instance.

Method Summary

Modifier and Type	Method	Description
boolean	addLogApiClassLoader(ClassLoader apiClassLoader)	Register a class loader which is a known log API, and thus should be skipped over when searching for the log context to use for the caller class.
LogContext	getLogContext()	Get the current log context.
void	registerLogContext(ClassLoader classLoader, LogContext logContext)	Register a class loader with a log context.
boolean	removeLogApiClassLoader(ClassLoader apiClassLoader)	Remove a class loader from the known log APIs set.
boolean	unregisterLogContext(ClassLoader classLoader, LogContext logContext)	Unregister a class loader/log context association.

Methods inherited from class java.lang.Object

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

Constructor Detail

CallerClassLoaderLogContextSelector

public CallerClassLoaderLogContextSelector(LogContextSelector defaultSelector)

Construct a new instance. If no matching log context is found, the provided default selector is consulted.

Parameters:

defaultSelector - the selector to consult if no matching log context is found

CallerClassLoaderLogContextSelector

public CallerClassLoaderLogContextSelector(LogContextSelector defaultSelector,
                                           boolean checkParentClassLoaders)

Construct a new instance. If no matching log context is found, the provided default selector is consulted.

If the checkParentClassLoaders is set to true this selector recursively searches the class loader parents until a match is found or a null parent is found.

Parameters:

defaultSelector - the selector to consult if no matching log context is found

checkParentClassLoaders - true if the log context could not found for the class loader and the parent class loader should be checked

CallerClassLoaderLogContextSelector

public CallerClassLoaderLogContextSelector()

Construct a new instance. If no matching log context is found, the system context is used.

CallerClassLoaderLogContextSelector

public CallerClassLoaderLogContextSelector(boolean checkParentClassLoaders)

Construct a new instance. If no matching log context is found, the system context is used.

If the checkParentClassLoaders is set to true this selector recursively searches the class loader parents until a match is found or a null parent is found.

Parameters:

checkParentClassLoaders - true if the log context could not found for the class loader and the parent class loader should be checked

Method Detail

getLogContext

public LogContext getLogContext()

Get the current log context. This instance will consult the call stack to see if the first callers classloader is associated with a log context. The first caller is determined by the first class loader that is not registered as a log API.

Specified by:

getLogContext in interface LogContextSelector

Returns:

the current log context

addLogApiClassLoader

public boolean addLogApiClassLoader(ClassLoader apiClassLoader)

Register a class loader which is a known log API, and thus should be skipped over when searching for the log context to use for the caller class.

Parameters:

apiClassLoader - the API class loader

Returns:

true if this class loader was previously unknown, or false if it was already registered

removeLogApiClassLoader

public boolean removeLogApiClassLoader(ClassLoader apiClassLoader)

Remove a class loader from the known log APIs set.

Parameters:

apiClassLoader - the API class loader

Returns:

true if the class loader was removed, or false if it was not known to this selector

registerLogContext

public void registerLogContext(ClassLoader classLoader,
                               LogContext logContext)
                        throws IllegalArgumentException

Register a class loader with a log context. This method requires the registerLogContext RuntimePermission.

Parameters:

classLoader - the classloader

logContext - the log context

Throws:

IllegalArgumentException - if the classloader is already associated with a log context

unregisterLogContext

public boolean unregisterLogContext(ClassLoader classLoader,
                                    LogContext logContext)

Unregister a class loader/log context association. This method requires the unregisterLogContext RuntimePermission.

Parameters:

classLoader - the classloader

logContext - the log context

Returns:

true if the association exists and was removed, false otherwise