| # Gaudi Framework, version v22r0 |

Home |  | Generated: 9 Feb 2011

# PoolDbDataConnection Class Reference

The DataConnection incanation for the usage in GaudiPoolDb. More...

`#include <PoolDbDataConnection.h>`

Collaboration diagram for PoolDbDataConnection:
[legend]

List of all members.

## Public Member Functions
| PoolDbDataConnection (IInterface *owner, const std::string &nam, int typ, int mode, pool::DbDomain &domH)
| Standard constructor.
virtual | ~PoolDbDataConnection ()
| Standard destructor.
pool::DbDatabase & | database ()
| Access to POOL database handle.
pool::DbTransaction & | transaction ()
| Access to POOL transaction handle.
virtual bool | isConnected () const
| Check if connected to data source.
virtual StatusCode | connectRead ()
| Open data stream in read mode.
virtual StatusCode | connectWrite (IoType)
| Open data stream in write mode.
virtual StatusCode | disconnect ()
| Release data stream.
virtual StatusCode | read (void *const , size_t)
| Read raw byte buffer from input stream.
virtual StatusCode | write (const void *, int)
| Write raw byte buffer to output stream.
virtual long long int | seek (long long int, int)
| Seek on the file described by ioDesc. Arguments as in seek().
## Protected Member Functions
virtual StatusCode | i_connect ()
| Internal connect call.
## Protected Attributes
int | m_type
int | m_mode
| Datasource access mode.
pool::DbTransaction | m_transaction
| Transaction handle for this data source.
pool::DbDatabase | m_dbH
| Database handle for this data source.
pool::DbDomain | m_domH
| Domain handle specifying the storage domain.

## Detailed Description

The DataConnection incanation for the usage in GaudiPoolDb.

This entity interacts with the IODataManager from the GaudiUtils package and allows to connect refereneces between objects stored in POOL files.

M.Frank

Version:
  1.0

Date:
  20/10/2007

Definition at line 29 of file PoolDbDataConnection.h.

## Constructor & Destructor Documentation

PoolDbDataConnection::PoolDbDataConnection | ( | IInterface * | owner,
|  | const std::string & | nam,
|  | int | typ,
|  | int | mode,
|  | pool::DbDomain & | domH |
| ) |  |  |

Standard constructor.

PoolDbDataConnection::~PoolDbDataConnection | ( |  | ) | `[virtual]`

Standard destructor.

Definition at line 48 of file PoolDbDataConnection.cpp.

    00048                                                     {
    00049   s_connectionCount->decrement();
    00050 }

## Member Function Documentation

virtual StatusCode PoolDbDataConnection::connectRead | ( |  | ) | `[inline, virtual]`

Open data stream in read mode.

Definition at line 55 of file PoolDbDataConnection.h.

    00055 {     return i_connect();          }

virtual StatusCode PoolDbDataConnection::connectWrite | ( | IoType |  | ) | `[inline, virtual]`

Open data stream in write mode.

Definition at line 57 of file PoolDbDataConnection.h.

    00057 {return i_connect();    }

pool::DbDatabase& PoolDbDataConnection::database | ( |  | ) | `[inline]`

Access to POOL database handle.

Definition at line 49 of file PoolDbDataConnection.h.

    00049 {     return m_dbH;                }

StatusCode PoolDbDataConnection::disconnect | ( |  | ) | `[virtual]`

Release data stream.

Definition at line 86 of file PoolDbDataConnection.cpp.

    00086                                              {
    00087   if ( m_dbH.isValid() )  {
    00088     m_dbH.close();
    00089     m_dbH = DbDatabase(pool::POOL_StorageType);
    00090     return StatusCode::SUCCESS;
    00091   }
    00092   return StatusCode::FAILURE;
    00093 }

StatusCode PoolDbDataConnection::i_connect | ( |  | ) | `[protected, virtual]`

Internal connect call.

Open data stream.

Definition at line 53 of file PoolDbDataConnection.cpp.

    00053                                             {
    00054   DbAccessMode mode = (DbAccessMode)m_mode;
    00055   // Note: (1<<4) means RECREATE existing: We need to get the GUID in order to not
    00056   //       create a new one, if the catalog is pre-allocated
    00057   bool open_existing = isEqualMode(mode,pool::READ)||isEqualMode(mode,pool::UPDATE|(1<<4));
    00058   m_dbH = DbDatabase(m_domH.find(fid()));
    00059   if ( !m_dbH.isValid() )  {
    00060     std::string true_fid;
    00061     pool::DbStatus sc = m_dbH.open(m_domH, pfn(), fid(), mode);
    00062     if ( sc.isSuccess() && open_existing )  {
    00063       m_dbH.param("FID",true_fid);
    00064       if ( fid() == pfn() ) {
    00065         m_fid = true_fid;
    00066         m_dbH.close();
    00067         sc = m_dbH.open(m_domH, pfn(), fid(), mode);
    00068       }
    00069       else if ( strcasecmp(true_fid.c_str(),fid().c_str()) != 0 )  {
    00070         m_dbH.close();
    00071         throw std::runtime_error("FID mismatch:\n\t\t\t\tFID="+
    00072                                  fid()+" (catalog) <> \n\t\t\t\t"+
    00073                                  true_fid+" (file) for PFN="+pfn());
    00074         return BAD_DATA_CONNECTION;
    00075       }
    00076     }
    00077     else if ( open_existing ) {
    00078       return BAD_DATA_CONNECTION;
    00079     }
    00080     return sc.isSuccess() ? StatusCode::SUCCESS : StatusCode::FAILURE;
    00081   }
    00082   return StatusCode::SUCCESS;
    00083 }

virtual bool PoolDbDataConnection::isConnected | ( |  | ) | const`[inline, virtual]`

Check if connected to data source.

Definition at line 53 of file PoolDbDataConnection.h.

    00053 {     return m_dbH.ptr() != 0;     }

virtual StatusCode PoolDbDataConnection::read | ( | void * | const,
|  | size_t |  |
| ) |  |  | `[inline, virtual]`

Read raw byte buffer from input stream.

Definition at line 61 of file PoolDbDataConnection.h.

    00062   {  return StatusCode::FAILURE;                                             }

virtual long long int PoolDbDataConnection::seek | ( | long long | int,
|  | int |  |
| ) |  |  | `[inline, virtual]`

Seek on the file described by ioDesc. Arguments as in seek().

Definition at line 67 of file PoolDbDataConnection.h.

    00068   {  return -1;                                                              }

pool::DbTransaction& PoolDbDataConnection::transaction | ( |  | ) | `[inline]`

Access to POOL transaction handle.

Definition at line 51 of file PoolDbDataConnection.h.

    00051 {     return m_transaction;        }

virtual StatusCode PoolDbDataConnection::write | ( | const void * | ,
|  | int |  |
| ) |  |  | `[inline, virtual]`

Write raw byte buffer to output stream.

Definition at line 64 of file PoolDbDataConnection.h.

    00065   {  return StatusCode::FAILURE;                                             }

## Member Data Documentation

pool::DbDatabase PoolDbDataConnection::m_dbH`[protected]`

Database handle for this data source.

Definition at line 37 of file PoolDbDataConnection.h.

pool::DbDomain PoolDbDataConnection::m_domH`[protected]`

Domain handle specifying the storage domain.

Definition at line 39 of file PoolDbDataConnection.h.

int PoolDbDataConnection::m_mode`[protected]`

Datasource access mode.

Definition at line 33 of file PoolDbDataConnection.h.

pool::DbTransaction PoolDbDataConnection::m_transaction`[protected]`

Transaction handle for this data source.

Definition at line 35 of file PoolDbDataConnection.h.

int PoolDbDataConnection::m_type`[protected]`

Definition at line 31 of file PoolDbDataConnection.h.

The documentation for this class was generated from the following files:

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r0/GaudiPoolDb/GaudiPoolDb/PoolDbDataConnection.h
- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r0/GaudiPoolDb/src/PoolDbDataConnection.cpp

All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Defines