org.apache.commons.logging.impl

Class LogFactoryImpl

java.lang.Object

org.apache.commons.logging.LogFactory

org.apache.commons.logging.impl.LogFactoryImpl

public class LogFactoryImpl
extends LogFactory

Concrete subclass of LogFactory that implements the following algorithm to dynamically select a logging implementation class to instantiate a wrapper for.

• Use a factory configuration attribute named org.apache.commons.logging.Log to identify the requested implementation class.
• Use the org.apache.commons.logging.Log system property to identify the requested implementation class.
• If Log4J is available, return an instance of org.apache.commons.logging.impl.Log4JLogger.
• If JDK 1.4 or later is available, return an instance of org.apache.commons.logging.impl.Jdk14Logger.
• Otherwise, return an instance of org.apache.commons.logging.impl.SimpleLog.

* *

If the selected Log implementation class has a setLogFactory() method that accepts a LogFactory parameter, this method will be called on each newly created * instance to identify the associated factory. This makes factory configuration attributes available to the Log instance, if it so desires.

* *

This factory will remember previously created Log instances for the same name, and will return them on repeated requests to the getInstance() method.

* * @author Rod Waldhoff * @author Craig R. McClanahan * @author Richard A. Sitze * @author Brian Stansberry * @version $Revision: 581090 $ $Date: 2007-10-02 00:01:06 +0200 (ti, 02 okt 2007) $

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALLOW_FLAWED_CONTEXT_PROPERTY
static String	ALLOW_FLAWED_DISCOVERY_PROPERTY
static String	ALLOW_FLAWED_HIERARCHY_PROPERTY
protected Hashtable	attributes
protected Hashtable	instances
static String	LOG_PROPERTY
protected static String	LOG_PROPERTY_OLD
protected Constructor	logConstructor
protected Class[]	logConstructorSignature
protected Method	logMethod
protected Class[]	logMethodSignature

Fields inherited from class org.apache.commons.logging.LogFactory

DIAGNOSTICS_DEST_PROPERTY, factories, FACTORY_DEFAULT, FACTORY_PROPERTIES, FACTORY_PROPERTY, HASHTABLE_IMPLEMENTATION_PROPERTY, nullClassLoaderFactory, PRIORITY_KEY, SERVICE_ID, TCCL_KEY

Constructor Summary

Constructors

Constructor and Description
LogFactoryImpl()

Method Summary

Methods

Modifier and Type	Method and Description
Object	getAttribute(String name)
String[]	getAttributeNames()
protected static ClassLoader	getClassLoader(Class clazz)
protected static ClassLoader	getContextClassLoader()
Log	getInstance(Class clazz)
Log	getInstance(String name)
protected String	getLogClassName() Deprecated.
protected Constructor	getLogConstructor() Deprecated.
protected static boolean	isDiagnosticsEnabled()
protected boolean	isJdk13LumberjackAvailable() Deprecated.
protected boolean	isJdk14Available() Deprecated.
protected boolean	isLog4JAvailable() Deprecated.
protected void	logDiagnostic(String msg)
protected Log	newInstance(String name)
void	release()
void	removeAttribute(String name)
void	setAttribute(String name, Object value)

Methods inherited from class org.apache.commons.logging.LogFactory

createFactory, directGetContextClassLoader, getFactory, getLog, getLog, logRawDiagnostic, newFactory, newFactory, objectId, release, releaseAll

Methods inherited from class java.lang.Object

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

Field Detail

LOG_PROPERTY

public static final String LOG_PROPERTY

See Also:

Constant Field Values

LOG_PROPERTY_OLD

protected static final String LOG_PROPERTY_OLD

See Also:

Constant Field Values

ALLOW_FLAWED_CONTEXT_PROPERTY

public static final String ALLOW_FLAWED_CONTEXT_PROPERTY

See Also:

Constant Field Values

ALLOW_FLAWED_DISCOVERY_PROPERTY

public static final String ALLOW_FLAWED_DISCOVERY_PROPERTY

See Also:

Constant Field Values

ALLOW_FLAWED_HIERARCHY_PROPERTY

public static final String ALLOW_FLAWED_HIERARCHY_PROPERTY

See Also:

Constant Field Values

attributes

protected Hashtable attributes

instances

protected Hashtable instances

logConstructor

protected Constructor logConstructor

logConstructorSignature

protected Class[] logConstructorSignature

logMethod

protected Method logMethod

logMethodSignature

protected Class[] logMethodSignature

Constructor Detail

LogFactoryImpl

public LogFactoryImpl()

Method Detail

getAttribute

public Object getAttribute(String name)

Specified by:

getAttribute in class LogFactory

getAttributeNames

public String[] getAttributeNames()

Specified by:

getAttributeNames in class LogFactory

getInstance

public Log getInstance(Class clazz)
                throws LogConfigurationException

Specified by:

getInstance in class LogFactory

Throws:

LogConfigurationException

getInstance

public Log getInstance(String name)
                throws LogConfigurationException

Specified by:

getInstance in class LogFactory

Throws:

LogConfigurationException

release

public void release()

Specified by:

release in class LogFactory

removeAttribute

public void removeAttribute(String name)

Specified by:

removeAttribute in class LogFactory

setAttribute

public void setAttribute(String name,
                Object value)

Specified by:

setAttribute in class LogFactory

getContextClassLoader

protected static ClassLoader getContextClassLoader()
                                            throws LogConfigurationException

Throws:

LogConfigurationException

isDiagnosticsEnabled

protected static boolean isDiagnosticsEnabled()

getClassLoader

protected static ClassLoader getClassLoader(Class clazz)

logDiagnostic

protected void logDiagnostic(String msg)

getLogClassName

@Deprecated
protected String getLogClassName()

Deprecated.

getLogConstructor

@Deprecated
protected Constructor getLogConstructor()
                                 throws LogConfigurationException

Deprecated.

Throws:

LogConfigurationException

isJdk13LumberjackAvailable

@Deprecated
protected boolean isJdk13LumberjackAvailable()

Deprecated.

isJdk14Available

@Deprecated
protected boolean isJdk14Available()

Deprecated.

isLog4JAvailable

@Deprecated
protected boolean isLog4JAvailable()

Deprecated.

newInstance

protected Log newInstance(String name)
                   throws LogConfigurationException

Throws:

LogConfigurationException