73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014-2018 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file auditor/taler-auditor-httpd_db.h
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* @brief High-level (transactional-layer) database operations for the auditor
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* @author Chrisitan Grothoff
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*/
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#ifndef TALER_AUDITOR_HTTPD_DB_H
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#define TALER_AUDITOR_HTTPD_DB_H
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#include <microhttpd.h>
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#include "taler_auditordb_plugin.h"
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/**
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* Function implementing a database transaction. Runs the transaction
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* logic; IF it returns a non-error code, the transaction logic MUST
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* NOT queue a MHD response. IF it returns an hard error, the
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* transaction logic MUST queue a MHD response and set @a mhd_ret. IF
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* it returns the soft error code, the function MAY be called again to
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* retry and MUST not queue a MHD response.
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*
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* @param cls closure
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* @param connection MHD request which triggered the transaction
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* @param session database session to use
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* @param[out] mhd_ret set to MHD response status for @a connection,
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* if transaction failed (!)
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* @return transaction status
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*/
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typedef enum GNUNET_DB_QueryStatus
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(*TAH_DB_TransactionCallback)(void *cls,
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struct MHD_Connection *connection,
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struct TALER_AUDITORDB_Session *session,
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int *mhd_ret);
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/**
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* Run a database transaction for @a connection.
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* Starts a transaction and calls @a cb. Upon success,
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* attempts to commit the transaction. Upon soft failures,
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* retries @a cb a few times. Upon hard or persistent soft
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* errors, generates an error message for @a connection.
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*
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* @param connection MHD connection to run @a cb for
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* @param name name of the transaction (for debugging)
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* @param[out] set to MHD response code, if transaction failed
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* @param cb callback implementing transaction logic
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* @param cb_cls closure for @a cb, must be read-only!
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
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*/
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int
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TAH_DB_run_transaction (struct MHD_Connection *connection,
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const char *name,
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int *mhd_ret,
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TAH_DB_TransactionCallback cb,
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void *cb_cls);
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#endif
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/* TALER_AUDITOR_HTTPD_DB_H */
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