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Split client_context::after_command() into two stages, before

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sending result to client and after the result was sent. Added
s_result state to client_context states.
This commit is contained in:
Teemu Ollakka
2018-06-02 15:55:54 +03:00
parent c73e7c8f5d
commit 188bda1339
5 changed files with 59 additions and 22 deletions
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40
include/trrep/client_context.hpp
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@ -120,6 +120,10 @@ namespace trrep
* system.
*/
s_exec,
/*!
* Client handler is sending result to client.
*/
s_result,
/*!
* The client session is terminating.
*/
@ -136,32 +140,40 @@ namespace trrep
}
/*!
* Virtual method which should be called before the client
* Method which should be called before the client
* starts processing the command received from the application.
* This method will wait until the possible synchronous
* rollback for associated transaction has finished.
* The method has a side effect of changing the client
* context state to executing.
*
* If overridden, the implementation should call base
* class method before any implementation specific operations.
*
* \return Zero in case of success, non-zero in case of the
* associated transaction was BF aborted.
*/
virtual int before_command();
int before_command();
/*!
* Virtual method which should be called before returning
* Method which should be called before returning
* the control back to application which uses the DBMS system.
* This method will check if the transaction associated to
* the connection has been aborted. This method has a side effect
* of changing the client state to idle.
*
* If overridden, the implementation should call base
* class metods after any implementation specifict operations.
* the connection has been aborted. Rollback is performed
* if needed.
*/
virtual void after_command();
void after_command_before_result();
/*!
* Method which should be called after returning the
* control back to application which uses the DBMS system.
* The method will do the check if the transaction associated
* to the connection has been aborted. If so, rollback is
* performed and the transaction is left to aborted state
* so that the client will get appropriate error on next
* command.
*
* This method has a side effect of changing state to
* idle.
*/
void after_command_after_result();
/*!
* Before statement execution operations.
@ -176,7 +188,7 @@ namespace trrep
* is not allowed to be executed due to read or write
* isolation requirements.
*/
virtual int before_statement();
int before_statement();
/*!
* After statement execution operations.
@ -187,7 +199,7 @@ namespace trrep
* If overridden by the implementation, base class method
* should be called after any implementation specific operations.
*/
virtual void after_statement();
void after_statement();
int start_transaction()
{