impala::AdmissionController::QueueNode Struct Reference

Inheritance diagram for impala::AdmissionController::QueueNode:

Collaboration diagram for impala::AdmissionController::QueueNode:

Public Member Functions
	QueueNode (const QuerySchedule &query_schedule)
T *	Next () const
	Returns the Next/Prev node or NULL if this is the end/front. More...
T *	Prev () const

Public Attributes
Promise< bool >	is_admitted
const QuerySchedule &	schedule

Detailed Description

Structure stored in a QueryQueue representing a request. This struct lives only during the call to AdmitQuery().

Definition at line 109 of file admission-controller.h.

Constructor & Destructor Documentation

impala::AdmissionController::QueueNode::QueueNode ( const QuerySchedule &  query_schedule )

inline

Definition at line 110 of file admission-controller.h.

Member Function Documentation

template<typename T>

T* impala::InternalQueue< T >::Node::Next ( ) const

inlineinherited

Returns the Next/Prev node or NULL if this is the end/front.

Definition at line 48 of file internal-queue.h.

References impala::InternalQueue< T >::lock_, impala::InternalQueue< T >::Node::next, and impala::InternalQueue< T >::Node::parent_queue.

Referenced by impala::TEST(), and impala::BufferedBlockMgr::Validate().

template<typename T>

T* impala::InternalQueue< T >::Node::Prev ( ) const

inlineinherited

Definition at line 52 of file internal-queue.h.

References impala::InternalQueue< T >::lock_, impala::InternalQueue< T >::Node::parent_queue, and impala::InternalQueue< T >::Node::prev.

Referenced by impala::TEST().

Member Data Documentation

Promise<bool> impala::AdmissionController::QueueNode::is_admitted

Set when the request is admitted or rejected by the dequeuing thread. Used by AdmitQuery() to wait for admission or until the timeout is reached. The admission_ctrl_lock_ is not held while waiting on this promise, but the lock should be held when checking the result because the dequeuing thread holds it to Set().

Definition at line 117 of file admission-controller.h.

Referenced by impala::AdmissionController::AdmitQuery(), and impala::AdmissionController::DequeueLoop().

const QuerySchedule& impala::AdmissionController::QueueNode::schedule

The query schedule of the queued request. The schedule lives longer than the duration of the the QueueNode, which only lives the duration of the call to AdmitQuery.

Definition at line 122 of file admission-controller.h.

Referenced by impala::AdmissionController::DequeueLoop().

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The documentation for this struct was generated from the following file:

• be/src/scheduling/admission-controller.h