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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, Inc.
* Copyright (C) 2010 Jay Pipes <jaypipes@gmail.com>
*
* Authors:
*
* Jay Pipes <jaypipes@gmail.com.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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
/**
* @file
*
* Defines the API of the transaction log applier.
*
* @see drizzled/plugin/replicator.h
* @see drizzled/plugin/applier.h
*/
#pragma once
#include <drizzled/replication_services.h>
#include <drizzled/plugin/transaction_applier.h>
#include "transaction_log_entry.h"
#include <vector>
#include <string>
namespace drizzled
{
class Session;
}
class TransactionLog;
class TransactionLogIndex;
class WriteBuffer;
class TransactionLogApplier: public drizzled::plugin::TransactionApplier
{
public:
TransactionLogApplier(const std::string &name_arg,
TransactionLog *in_transaction_log,
TransactionLogIndex *in_transaction_log_index,
uint32_t in_num_write_buffers);
/** Destructor */
~TransactionLogApplier();
/**
* Applies a Transaction to the serial log
*
* @note
*
* It is important to note that memory allocation for the
* supplied pointer is not guaranteed after the completion
* of this function -- meaning the caller can dispose of the
* supplied message. Therefore, appliers which are
* implementing an asynchronous replication system must copy
* the supplied message to their own controlled memory storage
* area.
*
* @param Session descriptor
* @param Transaction message to be replicated
*/
drizzled::plugin::ReplicationReturnCode
apply(drizzled::Session &in_session,
const drizzled::message::Transaction &to_apply);
private:
/**
* This Applier owns the memory of the associated TransactionLog
* and its index - so we have to track it.
*/
TransactionLog *transaction_log;
TransactionLogIndex *transaction_log_index;
uint32_t num_write_buffers; ///< Number of write buffers used
std::vector<WriteBuffer *> write_buffers; ///< array of write buffers
/**
* Returns the write buffer for the supplied session
*
* @param Session descriptor
*/
WriteBuffer *getWriteBuffer(const drizzled::Session &session);
};
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