org.beanfabrics.log
Class LoggerFactory

java.lang.Object
  org.beanfabrics.log.LoggerFactory

public class LoggerFactory
extends java.lang.Object

The LoggerFactory is used for creating (or accessing cached) Logger objects. Which logger implementation is used depends on configuration. At first request the LoggerFactory chooses the concrete constructor by evaluating the following rules and reuses it for every subsequent request.

1. The LoggerFactory checks if the system property "org.beanfabrics.log.LoggerFactory.loggerclass" for the name of a valid class with a valid constructor. The constructor is valid if it is public, returns an instance of Logger, and requires a single parameter of type Class. This parameter is used as the logging category.
2. The LoggerFactory checks if slf4j is in the classpath. If that is the case, the factory uses the constructor of Slf4jLogger.
3. If none of the above is true, the LoggerFactory falls back to the default Jdk14Logger, that delegates to Logger.

Usually Beanfabrics classes store their logger reference in a static field, hence these logger instances are created when the calling class is loaded by the classloader.

See Also:

Logging Example

Field Summary

static java.lang.String

SYSPROPKEY_LOGGER The key of the system property to set a custom Logger.

Constructor Summary

LoggerFactory()

Method Summary

static Logger	getLogger(java.lang.Class clazz) Returns a the Logger instance for a certain Class.
static void	setLoggerClass(java.lang.Class clazz) Set the Class implementing the Logger.

Methods inherited from class java.lang.Object

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

Field Detail

SYSPROPKEY_LOGGER

public static final java.lang.String SYSPROPKEY_LOGGER

The key of the system property to set a custom Logger.

Constructor Detail

LoggerFactory

public LoggerFactory()

Method Detail

getLogger

public static Logger getLogger(java.lang.Class clazz)

Returns a the Logger instance for a certain Class.

Parameters:

clazz - the Class the Logger is for

Returns:

the Logger instance

setLoggerClass

public static void setLoggerClass(java.lang.Class clazz)
                           throws java.lang.IllegalArgumentException

Set the Class implementing the Logger. This class will be used to create new instances by getLogger(Class).

Parameters:

clazz - the Class implementing the Logger

Throws:

java.lang.IllegalArgumentException - if clazz is null, does not implement Logger or has no constructor with the argument "Class clazz"