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+/* Copyright (C) 2015-2019 Codership Oy <info@codership.com>
+
+ This program 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; version 2 of the License.
+
+ This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
+
+
+#ifndef WSREP_SCHEMA_H
+#define WSREP_SCHEMA_H
+
+/* wsrep-lib */
+#include "wsrep_types.h"
+
+#include "mysqld.h"
+#include "wsrep_mysqld.h"
+
+/*
+ Forward decls
+*/
+class THD;
+class Relay_log_info;
+struct TABLE;
+struct TABLE_LIST;
+struct st_mysql_lex_string;
+typedef struct st_mysql_lex_string LEX_STRING;
+
+/** Name of the table in `wsrep_schema_str` used for storing streaming
+replication data. In an InnoDB full format, e.g. "database/tablename". */
+extern const char* wsrep_sr_table_name_full;
+
+class Wsrep_schema
+{
+ public:
+
+ Wsrep_schema();
+ ~Wsrep_schema();
+
+ /*
+ Initialize wsrep schema. Storage engines must be running before
+ calling this function.
+ */
+ int init();
+
+ /*
+ Store wsrep view info into wsrep schema.
+ */
+ int store_view(THD*, const Wsrep_view& view);
+
+ /*
+ Restore view info from stable storage.
+ */
+ Wsrep_view restore_view(THD* thd, const Wsrep_id& own_id) const;
+
+ /**
+ Append transaction fragment to fragment storage.
+ Transaction must have been started for THD before this call.
+ In order to make changes durable, transaction must be committed
+ separately after this call.
+
+ @param thd THD object
+ @param server_id Wsrep server identifier
+ @param transaction_id Transaction identifier
+ @param flags Flags for the fragment
+ @param data Fragment data buffer
+
+ @return Zero in case of success, non-zero on failure.
+ */
+ int append_fragment(THD* thd,
+ const wsrep::id& server_id,
+ wsrep::transaction_id transaction_id,
+ wsrep::seqno seqno,
+ int flags,
+ const wsrep::const_buffer& data);
+ /**
+ Update existing fragment meta data. The fragment must have been
+ inserted before using append_fragment().
+
+ @param thd THD object
+ @param ws_meta Wsrep meta data
+
+ @return Zero in case of success, non-zero on failure.
+ */
+ int update_fragment_meta(THD* thd,
+ const wsrep::ws_meta& ws_meta);
+
+ /**
+ Remove fragments from storage. This method must be called
+ inside active transaction. Fragment removal will be committed
+ once the transaction commits.
+
+ @param thd Pointer to THD object
+ @param server_id Identifier of the running server
+ @param transaction_id Identifier of the current transaction
+ @param fragments Vector of fragment seqnos to be removed
+ */
+ int remove_fragments(THD* thd,
+ const wsrep::id& server_id,
+ wsrep::transaction_id transaction_id,
+ const std::vector<wsrep::seqno>& fragments);
+
+ /**
+ Replay a transaction from stored fragments. The caller must have
+ started a transaction for a thd.
+
+ @param thd Pointer to THD object
+ @param ws_meta Write set meta data for commit fragment.
+ @param fragments Vector of fragments to be replayed
+
+ @return Zero on success, non-zero on failure.
+ */
+ int replay_transaction(THD* thd,
+ Relay_log_info* rli,
+ const wsrep::ws_meta& ws_meta,
+ const std::vector<wsrep::seqno>& fragments);
+
+ /**
+ Recover streaming transactions from SR table.
+ This method should be called after storage enignes are initialized.
+ It will scan SR table and replay found streaming transactions.
+
+ @param orig_thd The THD object of the calling thread.
+
+ @return Zero on success, non-zero on failure.
+ */
+ int recover_sr_transactions(THD* orig_thd);
+
+ private:
+ /* Non-copyable */
+ Wsrep_schema(const Wsrep_schema&);
+ Wsrep_schema& operator=(const Wsrep_schema&);
+};
+
+extern Wsrep_schema* wsrep_schema;
+
+#endif /* !WSREP_SCHEMA_H */