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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008-2009 Sun Microsystems
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef DRIZZLED_REPLICATOR_H
#define DRIZZLED_REPLICATOR_H
#include <vector>
/* some forward declarations needed */
class Session;
class Table;
namespace drizzled
{
namespace plugin
{
class Replicator;
class Applier;
}
namespace message
{
class Command;
}
}
void add_replicator(drizzled::plugin::Replicator *repl);
void remove_replicator(drizzled::plugin::Replicator *repl);
/**
* This is a class which manages transforming internal
* transactional events into GPB messages and sending those
* events out through registered replicators and appliers.
*/
namespace drizzled
{
class TransactionServices
{
private:
/** Our collection of replicator plugins */
std::vector<drizzled::plugin::Replicator *> replicators;
/** Our collection of applier plugins */
std::vector<drizzled::plugin::Applier *> appliers;
/**
* Helper method which attaches a transaction context
* the supplied command based on the supplied Session's
* transaction information.
*/
void setCommandTransactionContext(drizzled::message::Command *in_command, Session *in_session) const;
/**
* Helper method which pushes a constructed message out
* to the registered replicator and applier plugins.
*
* @param Message to push out
*/
void push(drizzled::message::Command *to_push);
public:
/**
* Attaches a replicator to our internal collection of
* replicators.
*
* @param Pointer to a replicator to attach/register
*/
void attachReplicator(drizzled::plugin::Replicator *in_replicator);
/**
* Detaches/unregisters a replicator with our internal
* collection of replicators.
*
* @param Pointer to the replicator to detach
*/
void detachReplicator(drizzled::plugin::Replicator *in_replicator);
/**
* Attaches a applier to our internal collection of
* appliers.
*
* @param Pointer to a applier to attach/register
*/
void attachApplier(drizzled::plugin::Applier *in_applier);
/**
* Detaches/unregisters a applier with our internal
* collection of appliers.
*
* @param Pointer to the applier to detach
*/
void detachApplier(drizzled::plugin::Applier *in_applier);
/**
* Creates a new StartTransaction GPB message and pushes
* it to replicators.
*
* @param Pointer to the Session starting the transaction
*/
void startTransaction(Session *in_session);
/**
* Creates a new CommitTransaction GPB message and pushes
* it to replicators.
*
* @param Pointer to the Session committing the transaction
*/
void commitTransaction(Session *in_session);
/**
* Creates a new RollbackTransaction GPB message and pushes
* it to replicators.
*
* @param Pointer to the Session committing the transaction
*/
void rollbackTransaction(Session *in_session);
/**
* Creates a new InsertRecord GPB message and pushes it to
* replicators.
*
* @param Pointer to the Session which has inserted a record
* @param Pointer to the Table containing insert information
*/
void insertRecord(Session *in_session, Table *in_table);
/**
* Creates a new UpdateRecord GPB message and pushes it to
* replicators.
*
* @param Pointer to the Session which has updated a record
* @param Pointer to the Table containing update information
*/
void updateRecord(Session *in_session, Table *in_table, const unsigned char *, const unsigned char *);
/**
* Creates a new DeleteRecord GPB message and pushes it to
* replicators.
*
* @param Pointer to the Session which has deleted a record
* @param Pointer to the Table containing delete information
*/
void deleteRecord(Session *in_session, Table *in_table);
/**
* Creates a new RawSql GPB message and pushes it to
* replicators.
*
* @TODO With a real data dictionary, this really shouldn't
* be needed. CREATE TABLE would map to insertRecord call
* on the I_S, etc. Not sure what to do with administrative
* commands like CHECK TABLE, though..
*
* @param Pointer to the Session which issued the statement
* @param Query string
* @param Length of the query string
*/
void rawStatement(Session *in_session, const char *in_query, size_t in_query_len);
};
} /* end namespace drizzled */
#ifdef oldcode
/* todo, fill in this API */
/* these are the functions called by the rest of the drizzle server
to do whatever this plugin does. */
bool replicator_session_init (Session *session);
bool replicator_write_row(Session *session, Table *table);
bool replicator_update_row(Session *session, Table *table,
const unsigned char *before,
const unsigned char *after);
bool replicator_delete_row(Session *session, Table *table);
/* The below control transactions */
bool replicator_end_transaction(Session *session, bool autocommit, bool commit);
bool replicator_prepare(Session *session);
bool replicator_statement(Session *session, const char *query, size_t query_length);
#endif /* oldcode */
#endif /* DRIZZLED_REPLICATOR_H */
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