Drizzled Public API Documentation

filtered_replicator.h
Go to the documentation of this file.
1 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2009 Sun Microsystems, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
30 #pragma once
31 
32 #include <drizzled/atomics.h>
33 #include <drizzled/plugin/transaction_replicator.h>
34 
35 #include PCRE_HEADER
36 
37 #include <vector>
38 #include <string>
39 
40 namespace drizzle_plugin
41 {
42 
45 {
46 public:
47  FilteredReplicator(std::string name_arg,
48  const std::string &sch_filter,
49  const std::string &tab_filter,
50  const std::string &sch_regex,
51  const std::string &tab_regex);
52 
55 
73  drizzled::plugin::ReplicationReturnCode
75  drizzled::Session &in_session,
76  drizzled::message::Transaction &to_replicate);
77 
85  void setSchemaFilter(const std::string &input);
86 
90  const std::string &getSchemaFilter() const
91  {
92  return _sch_filter;
93  }
94 
102  void setTableFilter(const std::string &input);
103 
107  const std::string &getTableFilter() const
108  {
109  return _tab_filter;
110  }
111 
118  void updateTableSysvar(const char **var_ptr)
119  {
120  *var_ptr= _tab_filter.c_str();
121  pthread_mutex_unlock(&sysvar_tab_lock);
122  }
123 
130  void updateSchemaSysvar(const char **var_ptr)
131  {
132  *var_ptr= _sch_filter.c_str();
133  pthread_mutex_unlock(&sysvar_sch_lock);
134  }
135 
136 private:
137 
146  void populateFilter(std::string input,
147  std::vector<std::string> &filter);
148 
157  bool isSchemaFiltered(const std::string &schema_name);
158 
167  bool isTableFiltered(const std::string &table_name);
168 
179  std::string &in_schema_name,
180  std::string &in_table_name) const;
181 
193  void parseQuery(const std::string &sql,
194  std::string &schema_name,
195  std::string &table_name);
196 
197  /*
198  * Vectors of the tables and schemas to filter.
199  */
200  std::vector<std::string> schemas_to_filter;
201  std::vector<std::string> tables_to_filter;
202 
203  /*
204  * Variables to contain the string representation of the
205  * comma-separated lists of schemas and tables to filter.
206  */
207  std::string _sch_filter;
208  std::string _tab_filter;
209 
210  const std::string _sch_regex;
211  const std::string _tab_regex;
212 
213  /*
214  * We need locks to protect the vectors when they are
215  * being updated and accessed. It would be nice to use
216  * r/w locks here since the vectors will mostly be
217  * accessed in a read-only fashion and will be only updated
218  * rarely.
219  */
220  pthread_mutex_t sch_vector_lock;
221  pthread_mutex_t tab_vector_lock;
222 
223  /*
224  * We need a lock to protect the system variables
225  * that can be updated. We have a lock for each
226  * system variable.
227  */
228  pthread_mutex_t sysvar_sch_lock;
229  pthread_mutex_t sysvar_tab_lock;
230 
231  pcre *sch_re;
232  pcre *tab_re;
233 };
234 
235 } /* namespace drizzle_plugin */
236 
const std::string & getTableFilter() const
bool isTableFiltered(const std::string &table_name)
void updateSchemaSysvar(const char **var_ptr)
void parseQuery(const std::string &sql, std::string &schema_name, std::string &table_name)
void setTableFilter(const std::string &input)
drizzled::plugin::ReplicationReturnCode replicate(drizzled::plugin::TransactionApplier *in_applier, drizzled::Session &in_session, drizzled::message::Transaction &to_replicate)
void setSchemaFilter(const std::string &input)
const std::string & getSchemaFilter() const
bool isSchemaFiltered(const std::string &schema_name)
void updateTableSysvar(const char **var_ptr)
void populateFilter(std::string input, std::vector< std::string > &filter)
void parseStatementTableMetadata(const drizzled::message::Statement &in_statement, std::string &in_schema_name, std::string &in_table_name) const