org.apache.commons.logging
Class LogSource

java.lang.Object
  org.apache.commons.logging.LogSource

Deprecated. Use LogFactory instead - The default factory implementation performs exactly the same algorithm as this class did

public class LogSource

extends java.lang.Object

Factory for creating Log instances. Applications should call the makeNewLogInstance() method to instantiate new instances of the configured Log implementation class.

By default, calling getInstance() will use the following algorithm:

• 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.NoOpLog.

You can change the default behavior in one of two ways:

• On the startup command line, set the system property org.apache.commons.logging.log to the name of the org.apache.commons.logging.Log implementation class you want to use.
• At runtime, call LogSource.setLogImplementation().

Version:

$Id: LogSource.html 853148 2013-03-05 18:53:06Z tn $

Author:

Rod Waldhoff

Field Summary

protected static boolean	jdk14IsAvailable Deprecated. Is JDK 1.4 logging available
protected static boolean	log4jIsAvailable Deprecated. Is log4j available (in the current classpath)
protected static java.lang.reflect.Constructor	logImplctor Deprecated. Constructor for current log class
protected static java.util.Hashtable	logs Deprecated.

Method Summary

static Log	getInstance(java.lang.Class clazz) Deprecated. Get a Log instance by class
static Log	getInstance(java.lang.String name) Deprecated. Get a Log instance by class name
static java.lang.String[]	getLogNames() Deprecated. Returns a String array containing the names of all logs known to me.
static Log	makeNewLogInstance(java.lang.String name) Deprecated. Create a new Log implementation, based on the given name.
static void	setLogImplementation(java.lang.Class logclass) Deprecated. Set the log implementation/log implementation factory by class.
static void	setLogImplementation(java.lang.String classname) Deprecated. Set the log implementation/log implementation factory by the name of the class.

Methods inherited from class java.lang.Object

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

Field Detail

logs

protected static java.util.Hashtable logs

Deprecated.

log4jIsAvailable

protected static boolean log4jIsAvailable

Deprecated.

Is log4j available (in the current classpath)

jdk14IsAvailable

protected static boolean jdk14IsAvailable

Deprecated.

Is JDK 1.4 logging available

logImplctor

protected static java.lang.reflect.Constructor logImplctor

Deprecated.

Constructor for current log class

Method Detail

setLogImplementation

public static void setLogImplementation(java.lang.String classname)
                                 throws java.lang.LinkageError,
                                        java.lang.ExceptionInInitializerError,
                                        java.lang.NoSuchMethodException,
                                        java.lang.SecurityException,
                                        java.lang.ClassNotFoundException

Deprecated.

Set the log implementation/log implementation factory by the name of the class. The given class must implement Log, and provide a constructor that takes a single String argument (containing the name of the log).

Throws:

java.lang.LinkageError

java.lang.ExceptionInInitializerError

java.lang.NoSuchMethodException

java.lang.SecurityException

java.lang.ClassNotFoundException

setLogImplementation

public static void setLogImplementation(java.lang.Class logclass)
                                 throws java.lang.LinkageError,
                                        java.lang.ExceptionInInitializerError,
                                        java.lang.NoSuchMethodException,
                                        java.lang.SecurityException

Deprecated.

Set the log implementation/log implementation factory by class. The given class must implement Log, and provide a constructor that takes a single String argument (containing the name of the log).

Throws:

java.lang.LinkageError

java.lang.ExceptionInInitializerError

java.lang.NoSuchMethodException

java.lang.SecurityException

getInstance

public static Log getInstance(java.lang.String name)

Deprecated.

Get a Log instance by class name

getInstance

public static Log getInstance(java.lang.Class clazz)

Deprecated.

Get a Log instance by class

makeNewLogInstance

public static Log makeNewLogInstance(java.lang.String name)

Deprecated.

Create a new Log implementation, based on the given name.

The specific Log implementation returned is determined by the value of the org.apache.commons.logging.log property. The value of org.apache.commons.logging.log may be set to the fully specified name of a class that implements the Log interface. This class must also have a public constructor that takes a single String argument (containing the name of the Log to be constructed.

When org.apache.commons.logging.log is not set, or when no corresponding class can be found, this method will return a Log4JLogger if the log4j Logger class is available in the LogSource's classpath, or a Jdk14Logger if we are on a JDK 1.4 or later system, or NoOpLog if neither of the above conditions is true.

Parameters:

name - the log name (or category)

getLogNames

public static java.lang.String[] getLogNames()

Deprecated.

Returns a String array containing the names of all logs known to me.