~drizzle-trunk/drizzle/development

2386.1.1 by Marcus Eriksson
initial zeromq replicator support
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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2011 Marcus Eriksson
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 *
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 *  Authors:
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 *
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 *  Marcus Eriksson <krummas@gmail.com>
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#pragma once
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#include <drizzled/replication_services.h>
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#include <drizzled/plugin/transaction_applier.h>
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#include <string>
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#include <zmq.h>
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namespace drizzle_plugin
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{
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/**
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 * @brief
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 *   A TransactionApplier that publishes transaction on a zeromq pub socket
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 *
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 * @details
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 * sends messages to a pub socket
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 */
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class ZeroMQLog :
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  public drizzled::plugin::TransactionApplier 
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{
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private:
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  void *_socket;
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  pthread_mutex_t publishLock;
2386.1.2 by Marcus Eriksson
add schema as first frame and add some initial docs
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  std::string getSchemaName(const drizzled::message::Transaction &txn);
2386.1.1 by Marcus Eriksson
initial zeromq replicator support
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public:
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  /**
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   * @brief
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   *   Constructs a new ZeroMQLog.
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   *
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   * @details
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   *
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   * @param[in] name of plugin
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   * @param[in] the endpoint string (typically tcp:// *:9999) (no space actually, compiler whines about comment within comment..)
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  */
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  ZeroMQLog(const std::string &name, const std::string &endpoint);
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  ~ZeroMQLog();
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  /**
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   * @brief
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   *   Serializes the transaction and publishes the message to zmq
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   *
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   * @details
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   *   Serializes the protobuf transaction and drops it on zmq
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   *
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   * @param[in] to_apply the transaction to send
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   */
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  drizzled::plugin::ReplicationReturnCode
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  apply(drizzled::Session &session, const drizzled::message::Transaction &to_apply);
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};
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} /* namespace drizzle_plugin */
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