Understanding Oracle GlassFish Server class loaders can help you determine where to place supporting JAR and resource files for your modules and applications. For general information about J2SE class loaders, see Understanding Network Class Loaders.
In a JVM implementation, the class loaders dynamically load a specific Java class file needed for resolving a dependency. For example, when an instance of java.util.Enumeration needs to be created, one of the class loaders loads the relevant class into the environment.
The following topics are addressed here:
Note - The Web Profile of the GlassFish Server supports the EJB 3.1 Lite specification, which allows enterprise beans within web applications, among other features. The full GlassFish Server supports the entire EJB 3.1 specification. For details, see JSR 318.
For information about class loader debugging, see Class Loader Debugging.