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Public Types | Public Member Functions | List of all members
IPartitionControl Class Referenceabstract

Create / access partitions. More...

`#include <GaudiKernel/IPartitionControl.h>`

Inheritance diagram for IPartitionControl:
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Collaboration diagram for IPartitionControl:
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## Public Types
enum | { PARTITION_NOT_PRESENT = 2, PARTITION_EXISTS = 4, NO_ACTIVE_PARTITION = 6 }
Public Types inherited from IInterface
enum | Status { SUCCESS = 1, NO_INTERFACE, VERSMISMATCH, LAST_ERROR }
| Return status. More...
using | iid = Gaudi::InterfaceId< IInterface, 0, 0 >
| Interface ID. More...
using | ext_iids = Gaudi::interface_list< iid >
| Extra interfaces. More...

## Public Member Functions
| DeclareInterfaceID (IPartitionControl, 1, 0)
| InterfaceID. More...
virtual StatusCode | create (const std::string &name, const std::string &type)=0
| Create a partition object. The name identifies the partition uniquely. More...
virtual StatusCode | create (const std::string &name, const std::string &type, IInterface *&pPartition)=0
| Create a partition object. The name identifies the partition uniquely. More...
virtual StatusCode | drop (const std::string &name)=0
| Drop a partition object. The name identifies the partition uniquely. More...
virtual StatusCode | drop (IInterface *pPartition)=0
| Drop a partition object. The name identifies the partition uniquely. More...
virtual StatusCode | activate (const std::string &name)=0
| Activate a partition object. The name identifies the partition uniquely. More...
virtual StatusCode | activate (IInterface *pPartition)=0
| Activate a partition object. More...
virtual StatusCode | get (const std::string &name, IInterface *&pPartition) const =0
| Access a partition object. The name identifies the partition uniquely. More...
virtual StatusCode | activePartition (std::string &name, IInterface *&pPartition) const =0
| Access the active partition object. More...
Public Member Functions inherited from IInterface
virtual void * | i_cast (const InterfaceID &) const =0
| main cast function More...
virtual std::vector< std::string > | getInterfaceNames () const =0
| Returns a vector of strings containing the names of all the implemented interfaces. More...
virtual unsigned long | addRef ()=0
| Increment the reference count of Interface instance. More...
virtual unsigned long | release ()=0
| Release Interface instance. More...
virtual unsigned long | refCount () const =0
| Current reference count. More...
virtual StatusCode | queryInterface (const InterfaceID &ti, void **pp)=0
| Set the void** to the pointer to the requested interface of the instance. More...
virtual | ~IInterface ()=default
| Virtual destructor. More...

## Additional Inherited Members
Static Public Member Functions inherited from IInterface
static const InterfaceID & | interfaceID ()
| Return an instance of InterfaceID identifying the interface. More...

## Detailed Description

Create / access partitions.

Partitioning is used to switch between different instances of multi-services like it is used e.g. in the event buffer tampering.

# Example code:

Switch between buffers for data processing. Use this technique to populate e.g. different datastores in order to later compare the different results.

auto partCtrl = eventSvc().as<IPartitionControl>(); if ( partCtrl ) { if ( partCtrl.activate("Partition_1").isSuccess() ) { SmartDataPtr mcparts(eventSvc(), "MC/Particles"); .... work with particles from buffer "Partition 1" all data registered by code here will go to "Partition 2" } if ( partCtrl.activate("Partition_2").isSuccess() ) { SmartDataPtr mcparts(eventSvc(), "MC/Particles"); .... work with particles from buffer "Partition 2" they are NOT they same as those in buffer 1 all data registered by code here will go to "Partition 2" } }

The access to the underlying service is also possible.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Be careful: This usage MAY NOT MODIFY e.g. the datastore by adding additional objects! This should solely by used for analysis after buffer tampering. In particular with "data on demand" this can easily have unexpected results.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

auto partCtrl = eventSvc().as<IPartitionControl>(); if ( partCtrl ) { IInterface* ptr = 0; if ( partCtrl->get("Partition 1", ptr).isSuccess() ) { SmartIF<IDataProviderSvc> partition(ptr); // Now we can work directly with this partition // There is no additional dispathing in the "eventSvc()". SmartDataPtr mcparts(partition, "MC/Particles"); if ( mcparts ) { } } }

Author
  Markus Frank

Version
  1.0

Definition at line 66 of file IPartitionControl.h.

## Member Enumeration Documentation

anonymous enum

Enumerator
PARTITION_NOT_PRESENT |
PARTITION_EXISTS |
NO_ACTIVE_PARTITION |

Definition at line 175 of file IPartitionControl.h.

175 { PARTITION_NOT_PRESENT = 2, PARTITION_EXISTS = 4, NO_ACTIVE_PARTITION = 6 };
IPartitionControl::NO_ACTIVE_PARTITION
Definition: IPartitionControl.h:175
IPartitionControl::PARTITION_NOT_PRESENT
Definition: IPartitionControl.h:175
IPartitionControl::PARTITION_EXISTS
Definition: IPartitionControl.h:175

## Member Function Documentation

virtual StatusCode IPartitionControl::activate | ( | const std::string & | name | ) |
| pure virtual

Activate a partition object. The name identifies the partition uniquely.

Access an existing partition object. Preferred call. The activation of a partition does not change the state of the partition. It only means that any call issued to the corresponding multi-service will be redirected to the this partition - typically a service implementing the same interfaces as the multi-service.

Parameters

  name | [IN] Partition name

Returns
  Status code indicating failure or success.

virtual StatusCode IPartitionControl::activate | ( | IInterface * | pPartition | ) |
| pure virtual

Activate a partition object.

Access an existing partition object. The activation of a partition does not change the state of the partition. It only means that any call issued to the corresponding multi-service will be redirected to the this partition - typically a service implementing the same interfaces as the multi-service.

If the interface pointer is invalid, IInterface::NO_INTERFACE is returned.

Parameters

  pPartition | [IN] Pointer to the partition.

Returns
  Status code indicating failure or success.

virtual StatusCode IPartitionControl::activePartition | ( | std::string & | name,
|  | IInterface *& | pPartition
| ) |  | const
| pure virtual

Access the active partition object.

Access the active partition object.

Parameters

  name | [OUT] Partition name
  pPartition | [OUT] Location to store the pointer to the partition.

Returns
  Status code indicating failure or success.

virtual StatusCode IPartitionControl::create | ( | const std::string & | name,
|  | const std::string & | type
| ) |  |
| pure virtual

Create a partition object. The name identifies the partition uniquely.

Create a new partition. If the partition exists already the existing object is returned. In this event the return code is PARTITION_EXISTS. The partition type typically contains all the information necessary to access the corresponding service, typically a pair "<service-type>/<service name>"

Parameters

  name | [IN] Partition name
  type | [IN] Partition type

Returns
  Status code indicating failure or success.

virtual StatusCode IPartitionControl::create | ( | const std::string & | name,
|  | const std::string & | type,
|  | IInterface *& | pPartition
| ) |  |
| pure virtual

Create a partition object. The name identifies the partition uniquely.

Create a new partition. If the partition exists already the existing object is returned. In this event the return code is PARTITION_EXISTS. The partition type typically contains all the information necessary to access the corresponding service, typically a pair "<service-type>/<service name>"

Parameters

  name | [IN] Partition name
  type | [IN] Partition type
  pPartition | [OUT] Reference to the created/existing partition

Returns
  Status code indicating failure or success.

IPartitionControl::DeclareInterfaceID | ( | IPartitionControl | ,
|  | 1 | ,
|  | 0 |
| ) |  |

InterfaceID.

virtual StatusCode IPartitionControl::drop | ( | const std::string & | name | ) |
| pure virtual

Drop a partition object. The name identifies the partition uniquely.

Remove a partition object. If the partition object does not exists, the return code is PARTITION_NOT_PRESENT. The partition may not be used anymore after this call.

Parameters

  name | [IN] Partition name

Returns
  Status code indicating failure or success.

virtual StatusCode IPartitionControl::drop | ( | IInterface * | pPartition | ) |
| pure virtual

Drop a partition object. The name identifies the partition uniquely.

Remove a partition object. If the partition object does not exists, the return code is PARTITION_NOT_PRESENT. The partition may not be used anymore after this call. If the interface pointer is invalid, IInterface::NO_INTERFACE is returned.

Parameters

  pPartition | [IN] Reference to existing partition

Returns
  Status code indicating failure or success.

virtual StatusCode IPartitionControl::get | ( | const std::string & | name,
|  | IInterface *& | pPartition
| ) |  | const
| pure virtual

Access a partition object. The name identifies the partition uniquely.

Access an existing partition object.

Parameters

  name | [IN] Partition name
  pPartition | [IN] Location to store the pointer to the partition.

Returns
  Status code indicating failure or success.

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

- GaudiKernel/GaudiKernel/IPartitionControl.h