Wt
4.11.0
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Abstract base class for a SQL connection pool. More...
#include <Wt/Dbo/SqlConnectionPool.h>
Public Member Functions | |
virtual | ~SqlConnectionPool () |
Destructor. | |
virtual std::unique_ptr< SqlConnection > | getConnection ()=0 |
Uses a connection from the pool. | |
virtual void | returnConnection (std::unique_ptr< SqlConnection >)=0 |
Returns a connection to the pool. | |
virtual void | prepareForDropTables () const =0 |
Prepares all connections in the pool for dropping the tables. | |
Abstract base class for a SQL connection pool.
An sql connection pool manages a pool of connections. It is shared between multiple sessions to allow these sessions to use a connection while handling a transaction. Note that a session only needs a connection while in-transaction, and thus you only need as much connections as the number of concurrent transactions.
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pure virtual |
Uses a connection from the pool.
This returns a connection from the pool that can be used. If the pool has no more connection available, the pool may decide to grow or block until a connection is returned.
This method is called by a Session when a new transaction is started.
Implemented in Wt::Dbo::FixedSqlConnectionPool.
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pure virtual |
Returns a connection to the pool.
This returns a connection to the pool. This method is called by a Session after a transaction has been finished.
Implemented in Wt::Dbo::FixedSqlConnectionPool.