gemfire::CqEvent Class Reference

---

Detailed Description

This interface provides methods to get all the information sent from the server about the CQ event.

The CqEvent is passed to the CQs CqListener methods. It can be used to retrieve such information as the region operation, CQ operation associated with the event, the new key and value from the event, and the CqQuery object associated with the event. The CqEvent is not an extension of CacheEvent.

Public Member Functions
virtual CqOperation::CqOperationType	getBaseOperation () const =0
	Get the operation on the base region that triggered this event.
virtual CqQueryPtr	getCq () const =0
	Get the CqQuery object of this event.
virtual CacheableBytesPtr	getDeltaValue () const =0
	Get the delta modification.
virtual CacheableKeyPtr	getKey () const =0
	Get the key relating to the event.
virtual CacheablePtr	getNewValue () const =0
	Get the new value of the modification.
virtual CqOperation::CqOperationType	getQueryOperation () const =0
	Get the operation on the query results.

---

Member Function Documentation

virtual CqOperation::CqOperationType gemfire::CqEvent::getBaseOperation

(

)

const [pure virtual]

Get the operation on the base region that triggered this event.

Returns:

Operation operation on the base region (on which CQ is created).

virtual CqQueryPtr gemfire::CqEvent::getCq

(

)

const [pure virtual]

Get the CqQuery object of this event.

See also:

CqQuery

Returns:

CqQuery object.

virtual CacheableBytesPtr gemfire::CqEvent::getDeltaValue

(

)

const [pure virtual]

Get the delta modification.

If there is no delta, returns null. New value may still be available.

Returns:

CacheableBytes delta value.

virtual CacheableKeyPtr gemfire::CqEvent::getKey

(

)

const [pure virtual]

Get the key relating to the event.

In case of REGION_CLEAR and REGION_INVALIDATE operation, the key will be NULLPTR.

Returns:

Object key.

virtual CacheablePtr gemfire::CqEvent::getNewValue

(

)

const [pure virtual]

Get the new value of the modification.

If there is no new value returns NULLPTR, this will happen during delete operation.

Returns:

Object new/modified value.

virtual CqOperation::CqOperationType gemfire::CqEvent::getQueryOperation

(

)

const [pure virtual]

Get the operation on the query results.

Supported operations include update, create, destroy, region clear and region invalidate.

Returns:

Operation operation with respect to CQ.

---