Configuring log4j within a Spring env.

Configuring log4j in a web environment is easy. See this and this
However Spring provides no-outof box configuration class. Log4jConfigurer is abstract..

Here is a simple class that initialize log4j for a standalone application.

public class ConcreteLog4jConfigurer extends Log4jConfigurer {
private String location;

public void init() throws Exception {
 initLogging(location);
}


public void destroy() throws Exception {
 shutdownLogging();
}


/**
 * @return the location
 */
public String getLocation() {
 return location;
}


/**
 * @param location the location to set
 */
public void setLocation(String location) {
 this.location = location;
}


}

The trick is to configure this class with an init-method and destroy-method.

bean id="concreteLog4jConfigurer" class="ConcreteLog4jConfigurer" method="init"
    property name="location"
       value classpath:myLog4J.properties /value
    /property
/bean

There are other properties like refresh period etc, that can be exposed too. That is left as an exercise to readers -:)