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/*
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* Copyright (C) 2008-2009 Trinity <http://www.trinitycore.org/>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "SqlOperations.h"
#include "SqlDelayThread.h"
#include "DatabaseEnv.h"
#include "DatabaseImpl.h"
/// ---- ASYNC STATEMENTS / TRANSACTIONS ----
void SqlStatement::Execute(Database *db)
{
/// just do it
db->DirectExecute(m_sql);
}
void SqlTransaction::Execute(Database *db)
{
if(m_queue.empty())
return;
db->DirectExecute("START TRANSACTION");
while(!m_queue.empty())
{
char const *sql = m_queue.front();
m_queue.pop();
if(!db->DirectExecute(sql))
{
free((void*)const_cast<char*>(sql));
db->DirectExecute("ROLLBACK");
while(!m_queue.empty())
{
free((void*)const_cast<char*>(m_queue.front()));
m_queue.pop();
}
return;
}
free((void*)const_cast<char*>(sql));
}
db->DirectExecute("COMMIT");
}
/// ---- ASYNC QUERIES ----
void SqlQuery::Execute(Database *db)
{
if(!m_callback || !m_queue)
return;
/// execute the query and store the result in the callback
m_callback->SetResult(db->Query(m_sql));
/// add the callback to the sql result queue of the thread it originated from
m_queue->add(m_callback);
}
void SqlResultQueue::Update()
{
/// execute the callbacks waiting in the synchronization queue
while(!empty())
{
Trinity::IQueryCallback * callback = next();
callback->Execute();
delete callback;
}
}
bool SqlQueryHolder::Execute(Trinity::IQueryCallback * callback, SqlDelayThread *thread, SqlResultQueue *queue)
{
if(!callback || !thread || !queue)
return false;
/// delay the execution of the queries, sync them with the delay thread
/// which will in turn resync on execution (via the queue) and call back
SqlQueryHolderEx *holderEx = new SqlQueryHolderEx(this, callback, queue);
thread->Delay(holderEx);
return true;
}
bool SqlQueryHolder::SetQuery(size_t index, const char *sql)
{
if(m_queries.size() <= index)
{
sLog.outError("Query index (%u) out of range (size: %u) for query: %s",index,m_queries.size(),sql);
return false;
}
if(m_queries[index].first != NULL)
{
sLog.outError("Attempt assign query to holder index (%u) where other query stored (Old: [%s] New: [%s])",
index,m_queries[index].first,sql);
return false;
}
/// not executed yet, just stored (it's not called a holder for nothing)
m_queries[index] = SqlResultPair(strdup(sql), NULL);
return true;
}
bool SqlQueryHolder::SetPQuery(size_t index, const char *format, ...)
{
if(!format)
{
sLog.outError("Query (index: %u) is empty.",index);
return false;
}
va_list ap;
char szQuery [MAX_QUERY_LEN];
va_start(ap, format);
int res = vsnprintf( szQuery, MAX_QUERY_LEN, format, ap );
va_end(ap);
if(res==-1)
{
sLog.outError("SQL Query truncated (and not execute) for format: %s",format);
return false;
}
return SetQuery(index,szQuery);
}
QueryResult* SqlQueryHolder::GetResult(size_t index)
{
if(index < m_queries.size())
{
/// the query strings are freed on the first GetResult or in the destructor
if(m_queries[index].first != NULL)
{
free((void*)(const_cast<char*>(m_queries[index].first)));
m_queries[index].first = NULL;
}
/// when you get a result aways remember to delete it!
return m_queries[index].second;
}
else
return NULL;
}
void SqlQueryHolder::SetResult(size_t index, QueryResult *result)
{
/// store the result in the holder
if(index < m_queries.size())
m_queries[index].second = result;
}
SqlQueryHolder::~SqlQueryHolder()
{
for(size_t i = 0; i < m_queries.size(); i++)
{
/// if the result was never used, free the resources
/// results used already (getresult called) are expected to be deleted
if(m_queries[i].first != NULL)
{
free((void*)(const_cast<char*>(m_queries[i].first)));
if(m_queries[i].second)
delete m_queries[i].second;
}
}
}
void SqlQueryHolder::SetSize(size_t size)
{
/// to optimize push_back, reserve the number of queries about to be executed
m_queries.resize(size);
}
void SqlQueryHolderEx::Execute(Database *db)
{
if(!m_holder || !m_callback || !m_queue)
return;
/// we can do this, we are friends
std::vector<SqlQueryHolder::SqlResultPair> &queries = m_holder->m_queries;
for(size_t i = 0; i < queries.size(); i++)
{
/// execute all queries in the holder and pass the results
char const *sql = queries[i].first;
if(sql) m_holder->SetResult(i, db->Query(sql));
}
/// sync with the caller thread
m_queue->add(m_callback);
}
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