depends.org.apache.commons.logging

类 LogSource

java.lang.Object

depends.org.apache.commons.logging.LogSource

已过时。

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 depends.org.apache.commons.logging.impl.Log4JLogger.
• If JDK 1.4 or later is available, return an instance of depends.org.apache.commons.logging.impl.Jdk14Logger.
• Otherwise, return an instance of depends.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 depends.org.apache.commons.logging.log to the name of the depends.org.apache.commons.logging.Log implementation class you want to use.
• At runtime, call LogSource.setLogImplementation().

字段概要

字段

限定符和类型	字段和说明
protected static boolean	jdk14IsAvailable 已过时。 Is JDK 1.4 logging available
protected static boolean	log4jIsAvailable 已过时。 Is log4j available (in the current classpath)
protected static java.lang.reflect.Constructor	logImplctor 已过时。 Constructor for current log class
protected static java.util.Hashtable	logs 已过时。

方法概要

方法

限定符和类型	方法和说明
static Log	getInstance(java.lang.Class clazz) 已过时。 Get a Log instance by class.
static Log	getInstance(java.lang.String name) 已过时。 Get a Log instance by class name.
static java.lang.String[]	getLogNames() 已过时。 Returns a String array containing the names of all logs known to me.
static Log	makeNewLogInstance(java.lang.String name) 已过时。 Create a new Log implementation, based on the given name.
static void	setLogImplementation(java.lang.Class logclass) 已过时。 Set the log implementation/log implementation factory by class.
static void	setLogImplementation(java.lang.String classname) 已过时。 Set the log implementation/log implementation factory by the name of the class.

从类继承的方法 java.lang.Object

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

字段详细资料

logs

protected static java.util.Hashtable logs

已过时。

log4jIsAvailable

protected static boolean log4jIsAvailable

已过时。

Is log4j available (in the current classpath)

jdk14IsAvailable

protected static boolean jdk14IsAvailable

已过时。

Is JDK 1.4 logging available

logImplctor

protected static java.lang.reflect.Constructor logImplctor

已过时。

Constructor for current log class

方法详细资料

setLogImplementation

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

已过时。

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).

抛出:

java.lang.LinkageError

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

已过时。

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).

抛出:

java.lang.LinkageError

java.lang.ExceptionInInitializerError

java.lang.NoSuchMethodException

java.lang.SecurityException

getInstance

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

已过时。

Get a Log instance by class name.

getInstance

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

已过时。

Get a Log instance by class.

makeNewLogInstance

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

已过时。

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

The specific Log implementation returned is determined by the value of the depends.org.apache.commons.logging.log property. The value of depends.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 depends.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.

参数:

name - the log name (or category)

getLogNames

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

已过时。

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