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## 6.1. Load-time instrumentation

Load-time instrumentation uses a Java agent to intercept all classes loaded by the JVM. As they are loaded JBoss AOP instruments them, allowing POJO Cache to monitor field changes. To enable load time instrumentation the JVM must be started with the following specified:

1. The `jboss.aop.path` system property set to the location of `pojocache-aop.xml`

2. A javaagent argument which includes jboss-aop-jdk50.jar

These requirements lead to the following example ant task:

    <java classname="Foo" fork="yes">
       <jvmarg value="-javaagent:lib/jboss-aop.jar"/>
       <jvmarg value="-Djboss.aop.path=etc/META-INF/pojocache-aop.xml"/>
       <classpath refid="test.classpath"/>
    </java>

Once the JVM is executed in this manner, any class with the `@Replicable` annotation will be instrumented when it is loaded.

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