extend log4j with MDC properties

log4j_mdc

# Setup your log4j ConversionPattern to include a new ApplicationId field

log4j.appender.out.layout.ConversionPattern=%d{ISO8601} | %-5.5p | %-16.16t | %-32.32c{1} | %X{ApplicationId} | %m%n

# You can now set this value in your java code like this

private void setupLogging() {
	org.apache.log4j.MDC.put("ApplicationId", "XZY321");
}

# Or if you are not writing java code you can still do this with Spring Xml Config

# Here's how to run a static method using Spring's MethodInvokingFactoryBean to add a MDC Property to log4j's tracked fields

# Setup a Spring Context with the 

<?xml version="1.0" encoding="UTF-8"?>
<!-- Configure Spring Context -->

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
       
      <bean
      	class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
      	<property name="targetClass">
      		<value>org.apache.log4j.MDC</value>
      	</property>
      	<property name="targetMethod">
      		<value>put</value>
      	</property>
      	<property name="arguments">
      		<list>
      			<value>ApplicationId</value>
      			<value>ABC123</value>
      		</list>
      	</property>
      </bean>

</beans>