Package com.sun.jdo.spi.persistence.utility.logging

Class LogHelper

java.lang.Object

com.sun.jdo.spi.persistence.utility.logging.LogHelper

public class LogHelper
extends Object

This class manages the logging facility for JDO components. It is the class that keeps track of the log factory in use for getting loggers for use in JDO components.

This class has no JDK 1.4 dependencies.

The log factory is responsible for constructing the loggers and for ensuring that there is only one logger per component.

Version:

1.0

Author:

Craig Russell

Field Summary

Fields

Modifier and Type	Field	Description
protected static boolean	jdk14	Flag to tell we are running in JDK 1.4 and can use java.util.logging.Logger implementation.
protected static LoggerFactory	loggerFactory	LoggerFactory registered for creating new loggers.

Constructor Summary

Constructors

Constructor	Description
LogHelper()

Method Summary

Modifier and Type	Method	Description
static Logger	getLogger(String loggerName, String bundleName, ClassLoader loader)	Get a Logger.
static boolean	isJDK14()	Check to see if the JDK 1.4 logging environment is available.
static void	registerLoggerFactory(LoggerFactory factory)	Register a LoggerFactory for use in managed environments or for special situations.

Methods inherited from class java.lang.Object

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

Field Details

jdk14

protected static boolean jdk14

Flag to tell we are running in JDK 1.4 and can use java.util.logging.Logger implementation.

loggerFactory

protected static LoggerFactory loggerFactory

LoggerFactory registered for creating new loggers.

Constructor Details

LogHelper

public LogHelper()

Method Details

getLogger

public static Logger getLogger(String loggerName,
 String bundleName,
 ClassLoader loader)

Get a Logger. This call is delegated to the registered LoggerFactory. If there is no registered LoggerFactory, then initialize one based on whether we are running in JDK 1.4 (or higher). The bundle name and class loader are passed to allow the implementation to properly find and construct the internationalization bundle. This method is synchronized to avoid race conditions where two threads access a component using the same Logger at the same time.

Parameters:

loggerName - the relative name of this logger

bundleName - the fully qualified name of the resource bundle

loader - the class loader used to load the resource bundle, or null

Returns:

the logger

registerLoggerFactory

public static void registerLoggerFactory(LoggerFactory factory)

Register a LoggerFactory for use in managed environments or for special situations. This factory will be delegated to for all getLogger requests.

Parameters:

factory - the LoggerFactory to use for all getLogger requests

isJDK14

public static boolean isJDK14()

Check to see if the JDK 1.4 logging environment is available.

Returns:

true if JDK 1.4 logging is available