Collaboration diagram for impala::ImpalaServer::ScopedSessionState:

Public Member Functions
	ScopedSessionState (ImpalaServer *impala)

Status	WithSession (const TUniqueId &session_id, boost::shared_ptr< SessionState > *session=NULL)

	~ScopedSessionState ()
	Decrements the reference count so the session can be expired correctly. More...

Private Attributes
boost::shared_ptr< SessionState >	session_
	Reference-counted pointer to the session state object. More...

ImpalaServer *	impala_
	Saved so that we can access ImpalaServer methods to get / return session state. More...

Detailed Description

Class that allows users of SessionState to mark a session as in-use, and therefore immune to expiration. The marking is done in WithSession() and undone in the destructor, so this class can be used to 'check-out' a session for the duration of a scope.

Definition at line 842 of file impala-server.h.

Constructor & Destructor Documentation

impala::ImpalaServer::ScopedSessionState::ScopedSessionState ( ImpalaServer * impala )

inline

Definition at line 844 of file impala-server.h.

impala::ImpalaServer::ScopedSessionState::~ScopedSessionState ( )

inline

Decrements the reference count so the session can be expired correctly.

Definition at line 858 of file impala-server.h.

References impala_, impala::ImpalaServer::MarkSessionInactive(), and session_.

Member Function Documentation

Status impala::ImpalaServer::ScopedSessionState::WithSession	(	const TUniqueId &	session_id,
		boost::shared_ptr< SessionState > *	session = `NULL`
	)

inline

Marks a session as in-use, and saves it so that it can be unmarked when this object goes out of scope. Returns OK unless there is an error in GetSessionState. Must only be called once per ScopedSessionState.

Definition at line 849 of file impala-server.h.

References impala::ImpalaServer::GetSessionState(), impala_, impala::Status::OK, RETURN_IF_ERROR, and session_.