org.apache.jackrabbit.spi.commons.logging
Class AbstractLogger

java.lang.Object
  org.apache.jackrabbit.spi.commons.logging.AbstractLogger

Direct Known Subclasses:

BatchLogger, IdFactoryLogger, NameFactoryLogger, PathFactoryLogger, QValueFactoryLogger, RepositoryServiceLogger, SessionInfoLogger

public class AbstractLogger
extends Object

Common base class for all log wrappers of SPI entities.

Nested Class Summary

protected static interface	AbstractLogger.Callable Type of thunk used in execute(Callable, String, Object[])
protected static interface	AbstractLogger.SafeCallable Type of thunk used in execute(SafeCallable, String, Object[])

Field Summary

protected LogWriter

writer The LogWriter used by this instance for persisting log messages.

Constructor Summary

AbstractLogger(LogWriter writer)
Create a new instance of this log wrapper which uses writer for persisting log messages.

Method Summary

protected Object	execute(AbstractLogger.Callable thunk, String methodName, Object[] args) Execute a thunk of a method which might throw a RepositoryException.
protected Object	execute(AbstractLogger.SafeCallable thunk, String methodName, Object[] args) Execute a thunk of a method which does not throw any checked exception.

Methods inherited from class java.lang.Object

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

Field Detail

writer

protected final LogWriter writer

The LogWriter used by this instance for persisting log messages.

Constructor Detail

AbstractLogger

public AbstractLogger(LogWriter writer)

Create a new instance of this log wrapper which uses writer for persisting log messages.

Parameters:

writer -

Method Detail

execute

protected Object execute(AbstractLogger.Callable thunk,
                         String methodName,
                         Object[] args)
                  throws RepositoryException

Execute a thunk of a method which might throw a RepositoryException. The call is logged to writer right before it is actually performed and after it returns. Any exception thrown by the call is logged before it is re-thrown.

Parameters:

thunk - thunk of the method to execute

methodName - the name of the method

args - the arguments passed to the method

Returns:

the value returned from executing the thunk

Throws:

RepositoryException - if executing the thunk throws an Exception the exception is re-thrown.

execute

protected Object execute(AbstractLogger.SafeCallable thunk,
                         String methodName,
                         Object[] args)

Execute a thunk of a method which does not throw any checked exception. The call is logged to writer right before it is actually performed and after it returns.

Parameters:

thunk - thunk of the method to execute

methodName - the name of the method

args - the arguments passed to the method

Returns:

the value returned from executing the thunk