DbiConnectionMaintainer Class Reference

Concept An object that hold open all DbiConnections throught its lifetime. Purpose To minimse the number of connections made and broken when performing multiple SQL queries. More...

#include <DbiConnectionMaintainer.h>

List of all members.

Public Member Functions
	DbiConnectionMaintainer (DbiCascader *cascader=0)
virtual	~DbiConnectionMaintainer ()
Private Attributes
DbiCascader *	fCascader
	May be null if made by (useless) default ctor.

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Detailed Description

Concept An object that hold open all DbiConnections throught its lifetime. Purpose To minimse the number of connections made and broken when performing multiple SQL queries.

Id

DbiConnectionMaintainer.h,v 1.2 2006/08/08 10:51:32 west Exp

DatabaseInterface

Contact: n.west1@physics.ox.ac.uk

Definition at line 27 of file DbiConnectionMaintainer.h.

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Constructor & Destructor Documentation

DbiConnectionMaintainer::DbiConnectionMaintainer (  DbiCascader *  cascader = 0  )

Definition at line 17 of file DbiConnectionMaintainer.cxx. References LEA_CTOR, and MSG. { // For database connections that are not permanent, the connection is // closed as soon as the last associated DbiStatement is // deleted. However, standard context queries involve several separate // SQL queries, each using its own DbiStatement and hence each involving // a separate connection. To maintain a single connection for the entire // set of SQL queries a DbiConnectionMaintainer can be use. On creation // it connects to every DbiConnection which prevents it from closing. On // destruction it disconnects from them allowing them to close, if // temporary, once any other associated DbiStatement has been deleted. LEA_CTOR //Leak Checker MSG("Dbi", Msg::kVerbose) << "Creating DbiConnectionMaintainer" << endl; fCascader = cascader; if ( fCascader ) fCascader->HoldConnections(); }

DbiConnectionMaintainer::~DbiConnectionMaintainer (   )  [virtual]

Definition at line 40 of file DbiConnectionMaintainer.cxx. References fCascader, LEA_DTOR, MSG, and DbiCascader::ReleaseConnections(). { if ( fCascader ) fCascader->ReleaseConnections(); LEA_DTOR //Leak Checker MSG("Dbi", Msg::kVerbose) << "Destroying DbiConnectionMaintainer" << endl; }

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Member Data Documentation

DbiCascader* DbiConnectionMaintainer::fCascader [private]

May be null if made by (useless) default ctor. Definition at line 42 of file DbiConnectionMaintainer.h. Referenced by ~DbiConnectionMaintainer().

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The documentation for this class was generated from the following files:

• DbiConnectionMaintainer.h
• DbiConnectionMaintainer.cxx

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