← Back to branch summary

~drizzle-trunk/drizzle/development

« back to all changes in this revision

Viewing changes to plugin/rabbitmq/rabbitmq_log.cc

  • Committer: Monty Taylor
  • Date: 2010-12-24 02:13:05 UTC
  • mto: This revision was merged to the branch mainline in revision 2038.
  • Revision ID: mordred@inaugust.com-20101224021305-e3slv1cyjczqorij
Changed the bzrignore file.

Show diffs side-by-side

added added

removed removed

Lines of Context:
plugin/rabbitmq/rabbitmq_log.cc
 
1
/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 
2
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 
3
 *
 
4
 *  Copyright (C) 2010 Marcus Eriksson
 
5
 *
 
6
 *  Authors:
 
7
 *
 
8
 *  Marcus Eriksson <krummas@gmail.com>
 
9
 *
 
10
 *  This program is free software; you can redistribute it and/or modify
 
11
 *  it under the terms of the GNU General Public License as published by
 
12
 *  the Free Software Foundation; either version 2 of the License, or
 
13
 *  (at your option) any later version.
 
14
 *
 
15
 *  This program is distributed in the hope that it will be useful,
 
16
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 
17
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
18
 *  GNU General Public License for more details.
 
19
 *
 
20
 *  You should have received a copy of the GNU General Public License
 
21
 *  along with this program; if not, write to the Free Software
 
22
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
23
 */
 
24
 
 
25
#include "config.h"
 
26
#include "rabbitmq_log.h"
 
27
#include <drizzled/message/transaction.pb.h>
 
28
#include <google/protobuf/io/coded_stream.h>
 
29
#include <stdio.h>
 
30
#include <drizzled/module/registry.h>
 
31
#include <drizzled/plugin.h>
 
32
#include <stdint.h>
 
33
#include "rabbitmq_handler.h"
 
34
#include <boost/program_options.hpp>
 
35
#include <drizzled/module/option_map.h>
 
36
 
 
37
namespace po= boost::program_options;
 
38
 
 
39
using namespace std;
 
40
using namespace drizzled;
 
41
using namespace google;
 
42
 
 
43
namespace drizzle_plugin
 
44
{
 
45
 
 
46
/**
 
47
 * rabbitmq port
 
48
 */
 
49
static port_constraint sysvar_rabbitmq_port;
 
50
 
 
51
 
 
52
RabbitMQLog::RabbitMQLog(const string &name, 
 
53
                         const std::string &exchange,
 
54
                         const std::string &routingkey,
 
55
                         RabbitMQHandler* mqHandler) :
 
56
  plugin::TransactionApplier(name),
 
57
  _rabbitMQHandler(mqHandler),
 
58
  _exchange(exchange),
 
59
  _routingkey(routingkey)
 
60
{ }
 
61
 
 
62
RabbitMQLog::~RabbitMQLog() 
 
63
{ }
 
64
 
 
65
plugin::ReplicationReturnCode
 
66
RabbitMQLog::apply(Session &, const message::Transaction &to_apply)
 
67
{
 
68
  size_t message_byte_length= to_apply.ByteSize();
 
69
  uint8_t* buffer= new uint8_t[message_byte_length];
 
70
  if(buffer == NULL)
 
71
  {
 
72
    errmsg_printf(ERRMSG_LVL_ERROR, _("Failed to allocate enough memory to transaction message\n"));
 
73
    deactivate();
 
74
    return plugin::UNKNOWN_ERROR;
 
75
  }
 
76
 
 
77
  to_apply.SerializeWithCachedSizesToArray(buffer);
 
78
  try
 
79
  {
 
80
    _rabbitMQHandler->publish(buffer, 
 
81
                             int(message_byte_length), 
 
82
                             _exchange,
 
83
                             _routingkey);
 
84
  }
 
85
  catch(exception& e)
 
86
  {
 
87
    errmsg_printf(ERRMSG_LVL_ERROR, _(e.what()));
 
88
    deactivate();
 
89
    return plugin::UNKNOWN_ERROR;
 
90
  }
 
91
  delete[] buffer;
 
92
  return plugin::SUCCESS;
 
93
}
 
94
 
 
95
static RabbitMQLog *rabbitmqLogger; ///< the actual plugin
 
96
static RabbitMQHandler* rabbitmqHandler; ///< the rabbitmq handler
 
97
 
 
98
/**
 
99
 * Initialize the rabbitmq logger - instanciates the dependencies (the handler)
 
100
 * and creates the log handler with the dependency - makes it easier to swap out
 
101
 * handler implementation
 
102
 */
 
103
static int init(drizzled::module::Context &context)
 
104
{
 
105
  const module::option_map &vm= context.getOptions();
 
106
  
 
107
  try 
 
108
  {
 
109
    rabbitmqHandler= new RabbitMQHandler(vm["host"].as<string>(),
 
110
                                         sysvar_rabbitmq_port, 
 
111
                                         vm["username"].as<string>(), 
 
112
                                         vm["password"].as<string>(), 
 
113
                                         vm["virtualhost"].as<string>());
 
114
  } 
 
115
  catch (exception& e) 
 
116
  {
 
117
    errmsg_printf(ERRMSG_LVL_ERROR, _("Failed to allocate the RabbitMQHandler.  Got error: %s\n"),
 
118
                  e.what());
 
119
    return 1;
 
120
  }
 
121
  try 
 
122
  {
 
123
    rabbitmqLogger= new RabbitMQLog("rabbit_log_applier",
 
124
                                    vm["exchange"].as<string>(),
 
125
                                    vm["routingkey"].as<string>(),
 
126
                                    rabbitmqHandler);
 
127
  } 
 
128
  catch (exception& e) 
 
129
  {
 
130
    errmsg_printf(ERRMSG_LVL_ERROR, _("Failed to allocate the RabbitMQLog instance.  Got error: %s\n"), 
 
131
                  e.what());
 
132
    return 1;
 
133
  }
 
134
 
 
135
  context.add(rabbitmqLogger);
 
136
  ReplicationServices &replication_services= ReplicationServices::singleton();
 
137
  replication_services.attachApplier(rabbitmqLogger, vm["use-replicator"].as<string>());
 
138
 
 
139
  context.registerVariable(new sys_var_const_string_val("host", vm["host"].as<string>()));
 
140
  context.registerVariable(new sys_var_constrained_value_readonly<in_port_t>("port", sysvar_rabbitmq_port));
 
141
  context.registerVariable(new sys_var_const_string_val("username", vm["username"].as<string>()));
 
142
  context.registerVariable(new sys_var_const_string_val("password", vm["password"].as<string>()));
 
143
  context.registerVariable(new sys_var_const_string_val("virtualhost", vm["virtualhost"].as<string>()));
 
144
  context.registerVariable(new sys_var_const_string_val("exchange", vm["exchange"].as<string>()));
 
145
  context.registerVariable(new sys_var_const_string_val("routingkey", vm["routingkey"].as<string>()));
 
146
 
 
147
  return 0;
 
148
}
 
149
 
 
150
 
 
151
static void init_options(drizzled::module::option_context &context)
 
152
{
 
153
  context("host", 
 
154
          po::value<string>()->default_value("localhost"),
 
155
          N_("Host name to connect to"));
 
156
  context("port",
 
157
          po::value<port_constraint>(&sysvar_rabbitmq_port)->default_value(5672),
 
158
          N_("Port to connect to"));
 
159
  context("virtualhost",
 
160
          po::value<string>()->default_value("/"),
 
161
          N_("RabbitMQ virtualhost"));
 
162
  context("username",
 
163
          po::value<string>()->default_value("guest"),
 
164
          N_("RabbitMQ username"));
 
165
  context("password",
 
166
          po::value<string>()->default_value("guest"),
 
167
          N_("RabbitMQ password"));
 
168
  context("use-replicator",
 
169
          po::value<string>()->default_value("default_replicator"),
 
170
          N_("Name of the replicator plugin to use (default='default_replicator')"));
 
171
  context("exchange",
 
172
          po::value<string>()->default_value("ReplicationExchange"),
 
173
          N_("Name of RabbitMQ exchange to publish to"));
 
174
  context("routingkey",
 
175
          po::value<string>()->default_value("ReplicationRoutingKey"),
 
176
          N_("Name of RabbitMQ routing key to use"));
 
177
}
 
178
 
 
179
} /* namespace drizzle_plugin */
 
180
 
 
181
DRIZZLE_PLUGIN(drizzle_plugin::init, NULL, drizzle_plugin::init_options);
 
182