DatabaseConnectionPool.h
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1 /* -*- C++ -*- */
2 
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21 
22 #ifndef FIX_DATABASECONNECTIONPOOL_H
23 #define FIX_DATABASECONNECTIONPOOL_H
24 
25 #ifdef _MSC_VER
26 #pragma warning( disable : 4503 4355 4786 4290 )
27 #endif
28 
29 #include "DatabaseConnectionID.h"
30 #include <string>
31 #include <map>
32 
33 namespace FIX
34 {
35 template< typename T > class DatabaseConnectionPool
36 {
37 public:
38  DatabaseConnectionPool( bool poolConnections )
39  : m_poolConnections( poolConnections ) {}
40 
41  T* create( const DatabaseConnectionID& id )
42  {
43  if( !m_poolConnections )
44  return new T( id );
45 
46  if( m_connections.find( id ) == m_connections.end() )
47  {
49  ( new T(id), 0 );
50  }
51  m_connections[id].second++;
52  return m_connections[id].first;
53  }
54 
55  bool destroy( T* pConnection )
56  {
57  if( !m_poolConnections )
58  {
59  delete pConnection;
60  return true;
61  }
62 
63  const DatabaseConnectionID& id = pConnection->connectionID();
64  if( m_connections.find( id ) == m_connections.end() )
65  return false;
66 
67  Connection& connection = m_connections[id];
68  if( connection.first != pConnection )
69  return false;
70 
71  connection.second--;
72  if( connection.second == 0 )
73  {
74  m_connections.erase( id );
75  delete pConnection;
76  }
77  return true;
78  }
79 
80 private:
81  typedef std::pair<T*, int>
82  Connection;
83  typedef std::map<DatabaseConnectionID, Connection>
85 
87  bool m_poolConnections;
88 };
89 }
90 
91 #endif
FIX::DatabaseConnectionPool::Connections
std::map< DatabaseConnectionID, Connection > Connections
Definition: DatabaseConnectionPool.h:118
FIX::DatabaseConnectionPool::DatabaseConnectionPool
DatabaseConnectionPool(bool poolConnections)
Definition: DatabaseConnectionPool.h:72
FIX::DatabaseConnectionPool::m_poolConnections
bool m_poolConnections
Definition: DatabaseConnectionPool.h:121
FIX::DatabaseConnectionPool::m_connections
Connections m_connections
Definition: DatabaseConnectionPool.h:120
DatabaseConnectionID.h
FIX::DatabaseConnectionPool::create
T * create(const DatabaseConnectionID &id)
Definition: DatabaseConnectionPool.h:75
FIX::DatabaseConnectionPool::Connection
std::pair< T *, int > Connection
Definition: DatabaseConnectionPool.h:116
FIX
Definition: Acceptor.cpp:34
FIX::DatabaseConnectionPool::destroy
bool destroy(T *pConnection)
Definition: DatabaseConnectionPool.h:89

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