How to configure GridGain Logging using log4j.properties

README

Sample grid-config.xml shows how to configure GridGain Logging 
using log4j.properties.  This is needed when you are integrating GridGain 
in an legacy app that use log4j.propreties for log4j configuration, 
whereas GridGain uses log4j.xml.

In the above example, we are setting gridLogger property by using an 
instance of GridLogger which is constructed using a regular log4j Logger object.

Then we have log4jInitialization bean that initialzes log4j using 
log4j.properties with the help of org.springframework.util.Log4jConfigurer.

grid-config.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:util="http://www.springframework.org/schema/util"
	xsi:schemaLocation="
        http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/util 
           http://www.springframework.org/schema/util/spring-util-2.5.xsd">


	<bean id="grid.cfg"
		class="org.gridgain.grid.GridConfigurationAdapter"
		scope="singleton">
		<property name="gridLogger">
			<bean
				class="org.gridgain.grid.logger.log4j.GridLog4jLogger">
				<constructor-arg ref="log4jLogger" />
			</bean>
		</property>

	</bean>

	<bean name="log4jLogger" class="org.apache.log4j.Logger"
		factory-method="getRootLogger"></bean>

	<bean id="log4jInitialization"
		class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
		<property name="targetClass"
			value="org.springframework.util.Log4jConfigurer" />
		<property name="targetMethod"
			value="initLogging" />
		<property name="arguments">
			<list>
				<value>classpath:log4j.properties</value>
			</list>
		</property>
	</bean>

</beans>