In addition to specifying a class name, the $class property in a properties file can be used to define an instance of a serialized JavaBean. A serialized JavaBean may be obtained from an IDE tool or you can create one in Java using the ObjectOutputStream class. These files should have a .ser suffix and should be stored in the CLASSPATH like .class files.
The value of the $class attribute should be a name of the form x.y. This will first look for a file x/y.ser in your CLASSPATH. If that file does not exist, Nucleus loads the class x.y. Nucleus uses the standard JavaBean utility method Beans.instantiate to implement this feature.
If you don’t use any serialized JavaBeans, you can improve performance by disabling checking for .ser files. To disable this checking, set the checkForSerFiles property of the top-level Nucleus component to false. For example, you can create a <ATG2007.3dir>/home/localconfig/Nucleus.properties file that includes this line:
checkForSerFiles=false
