public abstract class DOFOperation

The DOFOperation type exposes the following members.

	Name	Description
	DOFOperation	Initializes a new instance of the DOFOperation class

	Name	Description
	cancel	Cancel the operation.
	checkException	If this operation has resulted in any exception(s), checkException() will throw the first exception (since multiple exceptions are possible for some operations), otherwise, it will return immediately.
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	extend	Extend the operation.
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	getContext	Get the operation context.
	getException	Return an exception, if any, associated with this operation as a response.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	getTimeRemaining	Get the operation time remaining.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	isAcknowledged	Return whether or not the operation has been acknowledged.
	isCancelled
	isComplete	Is the operation complete.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	retry	Retry the operation.
	setTimeout	Set a new timeout value for the operation.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	waitAcknowledged	Block the current thread until the operation is acknowledged or has completed, or until the specified timeout expires.
	waitComplete	Block the current thread until the operation has completed.
	waitComplete(Int32)	Block the current thread until the operation has completed, or until the specified timeout expires.

Additionally, there are 6 operations that may result in an exception from the Provider. They are: Get , Set , Invoke , Session , Subscribe , and Register . They all can result in a DOFErrorException and the first 4 can also result in a DOFProviderException . The following describes where these exceptions are passed back to the requestor.

• Get, Set, and Invoke return a value and therefore the exceptions can be trapped in 3 ways (illustrated with Get):
1. Synchronous: Call DOFObject.get(Property, int)
2. Blocking asynchronous: Call DOFObject.beginGet(Property, int) , then block with Get.waitResult(int)
3. Non-blocking asynchronous: Call DOFObject.beginGet(Property, int) , then wait for GetOperationListener.getResult(Get, DOFProviderInfo, DOFValue, DOFException) to be called
• Session returns a session ID, so exceptions are trapped in Session.waitSession() (blocking asynchronous).
• Subscribe exceptions are passed into Listener (non-blocking asynchronous).

Reference