Class HelmaExtension

java.lang.Object
helma.extensions.HelmaExtension
Direct Known Subclasses:
DemoExtension

public abstract class HelmaExtension extends Object
Helma extensions have to subclass this. The extensions to be loaded are defined in server.properties by setting extensions = packagename.classname, packagename.classname.
  • Constructor Details

    • HelmaExtension

      public HelmaExtension()
  • Method Details

    • init

      public abstract void init(Server server) throws ConfigurationException
      called by the Server at startup time. should check wheter the needed classes are present and throw a ConfigurationException if not.
      Throws:
      ConfigurationException
    • applicationStarted

      public abstract void applicationStarted(Application app) throws ConfigurationException
      called when an Application is started. This should be synchronized when any self-initialization is performed.
      Throws:
      ConfigurationException
    • applicationStopped

      public abstract void applicationStopped(Application app)
      called when an Application is stopped. This should be synchronized when any self-destruction is performed.
    • applicationUpdated

      public abstract void applicationUpdated(Application app)
      called when an Application's properties are have been updated. note that this will be called at startup once *before* applicationStarted().
    • initScripting

      public abstract HashMap initScripting(Application app, ScriptingEngine engine) throws ConfigurationException
      called by the ScriptingEngine when it is initizalized. Throws a ConfigurationException when this type of ScriptingEngine is not supported. New methods and prototypes can be added to the scripting environment. New global vars should be returned in a HashMap with pairs of varname and ESObjects. This method should be synchronized, if it performs any other self-initialization outside the scripting environment.
      Throws:
      ConfigurationException
    • getName

      public abstract String getName()
      Returns:
      ...