org.apache.log4j.xml

Class DOMConfigurator

java.lang.Object

org.apache.log4j.xml.DOMConfigurator

All Implemented Interfaces:

org.apache.log4j.spi.Configurator

public class DOMConfigurator
extends Object
implements org.apache.log4j.spi.Configurator

This class isn't used by pax-logging, but is part of public API. Methods are simply no-op.

Since:

0.8.3

Author:

Christopher Taylor, Ceki Gülcü, Anders Kristensen

Field Summary

Fields inherited from interface org.apache.log4j.spi.Configurator

INHERITED, NULL

Constructor Summary

Constructors

Constructor and Description
DOMConfigurator() No argument constructor.

Method Summary

Modifier and Type	Method and Description
static void	configure(Element element) Configure log4j using a configuration element as defined in the log4j.dtd.
static void	configure(String filename) A static version of doConfigure(String, LoggerRepository).
static void	configure(URL url) A static version of doConfigure(URL, LoggerRepository).
static void	configureAndWatch(String configFilename) Like configureAndWatch(String, long) except that the default delay as defined by FileWatchdog.DEFAULT_DELAY is used.
static void	configureAndWatch(String configFilename, long delay) Read the configuration file configFilename if it exists.
void	doConfigure(Element element, org.apache.log4j.spi.LoggerRepository repository) Configure by taking in an DOM element.
void	doConfigure(InputStream inputStream, org.apache.log4j.spi.LoggerRepository repository) Configure log4j by reading in a log4j.dtd compliant XML configuration file.
void	doConfigure(Reader reader, org.apache.log4j.spi.LoggerRepository repository) Configure log4j by reading in a log4j.dtd compliant XML configuration file.
void	doConfigure(String filename, org.apache.log4j.spi.LoggerRepository repository)
void	doConfigure(URL url, org.apache.log4j.spi.LoggerRepository repository)
static Object	parseElement(Element element, Properties props, Class expectedClass) Creates an object and processes any nested param elements but does not call activateOptions.
static void	setParameter(Element elem, org.apache.log4j.config.PropertySetter propSetter, Properties props) Sets a parameter based from configuration file content.
static String	subst(String value, Properties props) Substitutes property value for any references in expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

DOMConfigurator

public DOMConfigurator()

No argument constructor.

Method Detail

configure

public static void configure(Element element)

Configure log4j using a configuration element as defined in the log4j.dtd.

configureAndWatch

public static void configureAndWatch(String configFilename)

Like configureAndWatch(String, long) except that the default delay as defined by FileWatchdog.DEFAULT_DELAY is used.

Parameters:

configFilename - A log4j configuration file in XML format.

configureAndWatch

public static void configureAndWatch(String configFilename,
                                     long delay)

Read the configuration file configFilename if it exists. Moreover, a thread will be created that will periodically check if configFilename has been created or modified. The period is determined by the delay argument. If a change or file creation is detected, then configFilename is read to configure log4j.

Parameters:

configFilename - A log4j configuration file in XML format.

delay - The delay in milliseconds to wait between each check.

doConfigure

public void doConfigure(String filename,
                        org.apache.log4j.spi.LoggerRepository repository)

doConfigure

public void doConfigure(URL url,
                        org.apache.log4j.spi.LoggerRepository repository)

Specified by:

doConfigure in interface org.apache.log4j.spi.Configurator

doConfigure

public void doConfigure(InputStream inputStream,
                        org.apache.log4j.spi.LoggerRepository repository)
                 throws FactoryConfigurationError

Configure log4j by reading in a log4j.dtd compliant XML configuration file.

Specified by:

doConfigure in interface org.apache.log4j.spi.Configurator

Throws:

FactoryConfigurationError

doConfigure

public void doConfigure(Reader reader,
                        org.apache.log4j.spi.LoggerRepository repository)
                 throws FactoryConfigurationError

Configure log4j by reading in a log4j.dtd compliant XML configuration file.

Throws:

FactoryConfigurationError

doConfigure

public void doConfigure(Element element,
                        org.apache.log4j.spi.LoggerRepository repository)

Configure by taking in an DOM element.

configure

public static void configure(String filename)
                      throws FactoryConfigurationError

A static version of doConfigure(String, LoggerRepository).

Throws:

FactoryConfigurationError

configure

public static void configure(URL url)
                      throws FactoryConfigurationError

A static version of doConfigure(URL, LoggerRepository).

Throws:

FactoryConfigurationError

subst

public static String subst(String value,
                           Properties props)

Substitutes property value for any references in expression.

Parameters:

value - value from configuration file, may contain literal text, property references or both

props - properties.

Returns:

evaluated expression, may still contain expressions if unable to expand.

Since:

1.2.15

setParameter

public static void setParameter(Element elem,
                                org.apache.log4j.config.PropertySetter propSetter,
                                Properties props)

Sets a parameter based from configuration file content.

Parameters:

elem - param element, may not be null.

propSetter - property setter, may not be null.

props - properties

Since:

1.2.15

parseElement

public static Object parseElement(Element element,
                                  Properties props,
                                  Class expectedClass)
                           throws Exception

Creates an object and processes any nested param elements but does not call activateOptions. If the class also supports UnrecognizedElementParser, the parseUnrecognizedElement method will be call for any child elements other than param.

Parameters:

element - element, may not be null.

props - properties

expectedClass - interface or class expected to be implemented by created class

Returns:

created class or null.

Throws:

Exception - thrown if the contain object should be abandoned.

Since:

1.2.15