org.springframework.util
Class Log4jConfigurer

java.lang.Object
  org.springframework.util.Log4jConfigurer

public abstract class Log4jConfigurer

extends Object

Convenience class that features simple methods for custom Log4J configuration.

Since:

13.03.2003

Author:

Juergen Hoeller

See Also:

Log4jWebConfigurer, Log4jConfigListener

Field Summary

static long	DEFAULT_REFRESH_INTERVAL Deprecated. Either choose no config file refreshing (initLogging with plain location) or specify an explicit refresh interval. As of Spring 1.1.3, there is no default refresh interval; the default is no config file refreshing now. The rationale is to avoid Log4J's watchdog thread (which never terminates) unless explicitly required.
static String	XML_FILE_EXTENSION

Constructor Summary

Log4jConfigurer()

Method Summary

static void	initLogging(String location) Initialize Log4J from the given location, with no config file refreshing.
static void	initLogging(String location, long refreshInterval) Initialize Log4J from the given location, with the given refresh interval for the config file.
static void	setWorkingDirSystemProperty(String key) Set the specified system property to the current working directory.
static void	shutdownLogging() Shutdown Log4J to release all file locks.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_REFRESH_INTERVAL

public static final long DEFAULT_REFRESH_INTERVAL

Deprecated. Either choose no config file refreshing (initLogging with plain location) or specify an explicit refresh interval. As of Spring 1.1.3, there is no default refresh interval; the default is no config file refreshing now. The rationale is to avoid Log4J's watchdog thread (which never terminates) unless explicitly required.

Default refresh interval, previously used for initLogging(location).

See Also:

initLogging(String), initLogging(String, long), Constant Field Values

XML_FILE_EXTENSION

public static final String XML_FILE_EXTENSION

See Also:

Constant Field Values

Constructor Detail

Log4jConfigurer

public Log4jConfigurer()

Method Detail

initLogging

public static void initLogging(String location)
                        throws FileNotFoundException

Initialize Log4J from the given location, with no config file refreshing. Assumes an XML file in case of a ".xml" file extension, and a properties file else.

Parameters:

location - the location of the config file

Throws:

FileNotFoundException - if the location specifies an invalid file path

See Also:

DEFAULT_REFRESH_INTERVAL

initLogging

public static void initLogging(String location,
                               long refreshInterval)
                        throws FileNotFoundException

Initialize Log4J from the given location, with the given refresh interval for the config file. Assumes an XML file in case of a ".xml" file extension, and a properties file else.

Log4J's watchdog thread will asynchronously check whether the timestamp of the config file has changed, using the given interval between checks. A refresh interval of 1000 milliseconds (one second), which allows to do on-demand log level changes with immediate effect, is not unfeasible.

WARNING: Log4J's watchdog thread does not terminate until VM shutdown; in particular, it does not terminate on LogManager shutdown. Therefore, it is recommended to not use config file refreshing in a production J2EE environment; the watchdog thread would not stop on application shutdown there.

Parameters:

location - the location of the config file

refreshInterval - interval between config file refresh checks, in milliseconds

Throws:

FileNotFoundException - if the location specifies an invalid file path

shutdownLogging

public static void shutdownLogging()

Shutdown Log4J to release all file locks.

setWorkingDirSystemProperty

public static void setWorkingDirSystemProperty(String key)

Set the specified system property to the current working directory. This can be used e.g. for test environments, for applications that leverage Log4jWebConfigurer's "webAppRootKey" support in a web environment.

Parameters:

key - system property key to use

See Also:

Log4jWebConfigurer