org.datamanager.tools.kernelproxy
Class InterfaceWorker

java.lang.Object
  |
  +--org.datamanager.kernel.Simpleton
        |
        +--org.datamanager.tools.kernelproxy.InterfaceWorker

Direct Known Subclasses:

AddEntityWorker, AddEventWorker, AttachEntityWorker, CreateAttributeWorker, CreateEntityWorker, DetachEntityWorker, GetAttributesWorker, GetBasesWorker, GetEntityValueWorker, GetNameWorker, RemoveEntityWorker, SearchWorker, SetEntityValueWorker, SubscriptionWorker

public abstract class InterfaceWorker

extends Simpleton

An abstract class that can be used to interact with the kernel. An InterfaceWorker is a Simpleton (so it has a kernel thread) that can cause events in the kernel. Essentially, a new InterfaceWorker is created. Its contents must be registered by the user, so that the thread is run. The results of the operation be then be retrieved through a get() method call. example: AddEntityWorker worker = new AddEntityWorker(entity); registerWorker(worker); Object value = worker.get();

Author:

Gordon Murphy, gpmurphy@indiana.edu

, Bryan Dawson, bdawson@indiana.edu

See Also:

Simpleton, KernelProxy

Nested Class Summary

Nested classes inherited from class org.datamanager.kernel.Simpleton

Simpleton.Information, Simpleton.Priority

Constructor Summary

InterfaceWorker()
Starts a thread that will call the construct method and then exit.

Method Summary

protected abstract Object	construct() Computes the value to be returned by the get method.
Object	get() Returns the value created by the construct method.
Simpleton.Information	getInformation() Reports Simpleton.Information about this Simpleton.
protected Object	getValue() Gets the value produced by the worker thread, or null if it hasn't been constructed yet.
void	process() Calls construct() in the subclasses.

Methods inherited from class org.datamanager.kernel.Simpleton

clone, getPriority, setInformation, setPriority, start

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InterfaceWorker

public InterfaceWorker()

Starts a thread that will call the construct method and then exit.

Method Detail

getValue

protected Object getValue()

Gets the value produced by the worker thread, or null if it hasn't been constructed yet.

construct

protected abstract Object construct()
                             throws DataManagerException

Computes the value to be returned by the get method.

DataManagerException

get

public Object get()

Returns the value created by the construct method. Returns null if either the constructing thread or the current thread was interrupted before a value was produced.

process

public void process()

Calls construct() in the subclasses.

Specified by:

process in class Simpleton

getInformation

public Simpleton.Information getInformation()

Description copied from class: Simpleton

Reports Simpleton.Information about this Simpleton.

Overrides:

getInformation in class Simpleton