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db_access.cc
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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) 2012 Mohit Srivastava
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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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#include <plugin/json_server/db_access.h>
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namespace
drizzle_plugin
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{
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namespace
json_server
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{
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DBAccess::DBAccess
(
Json::Value
&json_in,
Json::Value
&json_out,
enum
evhttp_cmd_type type,
const
char
* schema,
const
char
* table)
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{
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_json_in
= json_in;
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_json_out
= json_out;
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_type
=type;
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_schema
=schema;
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_table
=table;
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}
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void
DBAccess::execute
()
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{
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std::string sql;
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SQLGenerator
* generator =
new
SQLGenerator
(
_json_in
,
_schema
,
_table
);
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generator->
generateSql
(
_type
);
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sql= generator->
getSQL
();
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SQLExecutor
* executor =
new
SQLExecutor
(
_schema
);
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SQLToJsonGenerator
* jsonGenerator =
new
SQLToJsonGenerator
(
_json_out
,
_schema
,
_table
,executor);
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if
(executor->
executeSQL
(sql))
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{
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jsonGenerator->
generateJson
(
_type
);
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}
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else
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{
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// For POST request, if a table didn't exist, we create the table
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// transparently then retry the INSERT.
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if
(
_type
== EVHTTP_REQ_POST && executor->
getErr
() == drizzled::ER_TABLE_UNKNOWN)
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{
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generator->
generateCreateTableSql
();
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sql= generator->
getSQL
();
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if
(executor->
executeSQL
(sql))
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{
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generator->
generateSql
(
_type
);
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sql= generator->
getSQL
();
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if
(executor->
executeSQL
(sql))
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{
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jsonGenerator->
generateJson
(
_type
);
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}
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else
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{
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jsonGenerator->
generateSQLErrorJson
();
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}
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}
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else
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{
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jsonGenerator->
generateSQLErrorJson
();
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}
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}
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else
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{
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jsonGenerator->
generateSQLErrorJson
();
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}
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}
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_json_out
= jsonGenerator->
getJson
();
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delete
(jsonGenerator);
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delete
(executor);
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delete
(generator);
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}
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}
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}
plugin
json_server
db_access.cc
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1.8.4