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-rw-r--r--src/exchangedb/pg_preflight.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/src/exchangedb/pg_preflight.c b/src/exchangedb/pg_preflight.c
new file mode 100644
index 000000000..4533c9a97
--- /dev/null
+++ b/src/exchangedb/pg_preflight.c
@@ -0,0 +1,69 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2022 Taler Systems SA
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+ */
+/**
+ * @file exchangedb/pg_preflight.c
+ * @brief Implementation of the preflight function for Postgres
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_error_codes.h"
+#include "taler_dbevents.h"
+#include "taler_pq_lib.h"
+#include "pg_preflight.h"
+#include "pg_helper.h"
+
+
+/**
+ * Connect to the database if the connection does not exist yet.
+ *
+ * @param pg the plugin-specific state
+ * @return #GNUNET_OK on success
+ */
+enum GNUNET_GenericReturnValue
+TEH_PG_internal_setup (struct PostgresClosure *pg);
+
+
+enum GNUNET_GenericReturnValue
+TEH_PG_preflight (void *cls)
+{
+ struct PostgresClosure *pg = cls;
+ struct GNUNET_PQ_ExecuteStatement es[] = {
+ GNUNET_PQ_make_execute ("ROLLBACK"),
+ GNUNET_PQ_EXECUTE_STATEMENT_END
+ };
+
+ if (GNUNET_OK !=
+ TEH_PG_internal_setup (pg))
+ return GNUNET_SYSERR;
+ if (NULL == pg->transaction_name)
+ return GNUNET_OK; /* all good */
+ if (GNUNET_OK ==
+ GNUNET_PQ_exec_statements (pg->conn,
+ es))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "BUG: Preflight check rolled back transaction `%s'!\n",
+ pg->transaction_name);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "BUG: Preflight check failed to rollback transaction `%s'!\n",
+ pg->transaction_name);
+ }
+ pg->transaction_name = NULL;
+ return GNUNET_NO;
+}