MultiStoreSvc.cpp

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//====================================================================
//  MultiStoreSvc.cpp
//--------------------------------------------------------------------
//
//  Package    : System ( The LHCb Offline System)
//
//  Description: implementation of the Transient event data service.
//
//  Author     : M.Frank
//  History    :
// +---------+----------------------------------------------+---------
// |    Date |                 Comment                      | Who
// +---------+----------------------------------------------+---------
// | 29/10/98| Initial version                              | MF
// +---------+----------------------------------------------+---------
//
//====================================================================
#define  DATASVC_MULTISTORESVC_CPP

// Include files
#include "GaudiKernel/Service.h"
#include "GaudiKernel/SmartIF.h"
#include "GaudiKernel/TypeNameString.h"
#include "GaudiKernel/MsgStream.h"
#include "GaudiKernel/AttribStringParser.h"
#include "GaudiKernel/DataObject.h"
#include "GaudiKernel/ISvcLocator.h"
#include "GaudiKernel/ISvcManager.h"
#include "GaudiKernel/IOpaqueAddress.h"
#include "GaudiKernel/IConversionSvc.h"
#include "GaudiKernel/IDataManagerSvc.h"
#include "GaudiKernel/IAddressCreator.h"
#include "GaudiKernel/IDataProviderSvc.h"
#include "GaudiKernel/IPartitionControl.h"

#include <map>

// Forward declarations
// This class
class MultiStoreSvc;

typedef const std::string CSTR;
typedef IDataStoreAgent   AGENT;
typedef DataObject        OBJECT;
typedef IOpaqueAddress    ADDRESS;
typedef StatusCode        STATUS;

namespace {
  struct Partition final {
    SmartIF<IDataProviderSvc> dataProvider;
    SmartIF<IDataManagerSvc>  dataManager;
    std::string               name;
  };
}

class MultiStoreSvc: public extends<Service,
                                    IDataProviderSvc,
                                    IDataManagerSvc,
                                    IPartitionControl>
{
protected:
  typedef std::vector<std::string>         PartitionDefs;
  typedef std::map<std::string, Partition> Partitions;
  CLID                m_rootCLID;
  std::string         m_rootName;
  std::string         m_loader;
  SmartIF<IConversionSvc>  m_dataLoader;
  SmartIF<IAddressCreator> m_addrCreator;
  enum { no_type = 0, address_type = 1, object_type = 2};
  struct tagROOT {
    int type = no_type;
    std::string path;
    union {
      ADDRESS* address;
      OBJECT*  object;
    } root;
    tagROOT() { root.address = nullptr; }
  }                        m_root;
  Partition                m_current;
  Partitions               m_partitions;
  PartitionDefs            m_partitionDefs;
  std::string              m_defaultPartition;

  // member templates to help writing the function calls
  template <typename... Args, typename... UArgs>
  STATUS call_(STATUS (IDataProviderSvc::*pmf)( Args... ), UArgs&&... args)
  {
    return m_current.dataProvider ? (m_current.dataProvider->*pmf)(std::forward<UArgs>(args)...)
                                  : IDataProviderSvc::INVALID_ROOT;
  }
  template <typename... Args, typename... UArgs>
  STATUS call_(STATUS (IDataManagerSvc::*pmf)( Args... ), UArgs&&... args)
  {
    return m_current.dataManager ? (m_current.dataManager->*pmf)(std::forward<UArgs>(args)...)
                                  : IDataProviderSvc::INVALID_ROOT;
  }

public:
  CLID rootCLID() const override {
    return m_rootCLID;
  }
  const std::string& rootName() const override {
    return m_rootName;
  }

  STATUS registerAddress(CSTR& path, ADDRESS* pAddr) override {
    return call_<CSTR&,ADDRESS*>( &IDataManagerSvc::registerAddress, path, pAddr);
  }
  STATUS registerAddress(OBJECT* parent, CSTR& path, ADDRESS* pAddr) override {
    return call_<OBJECT*,CSTR&,ADDRESS*>( &IDataManagerSvc::registerAddress, parent, path, pAddr);
  }
  STATUS registerAddress(IRegistry* parent, CSTR& path, ADDRESS* pAdd) override {
    return call_<IRegistry*,CSTR&,ADDRESS*>( &IDataManagerSvc::registerAddress, parent, path, pAdd);
  }
  STATUS unregisterAddress(CSTR& path) override {
    return call_<CSTR&>( &IDataManagerSvc::unregisterAddress, path);
  }
  STATUS unregisterAddress(OBJECT* pParent, CSTR& path) override {
    return call_<OBJECT*,CSTR&>( &IDataManagerSvc::unregisterAddress, pParent, path);
  }
  STATUS unregisterAddress(IRegistry* pParent, CSTR& path) override {
    return call_<IRegistry*,CSTR&>( &IDataManagerSvc::unregisterAddress, pParent, path);
  }
  STATUS objectLeaves(const OBJECT*  pObject, std::vector<IRegistry*>& leaves) override {
    return call_<const OBJECT*,std::vector<IRegistry*>&>(&IDataManagerSvc::objectLeaves, pObject, leaves);
  }
  STATUS objectLeaves(const IRegistry* pObject, std::vector<IRegistry*>& leaves) override {
    return call_<const IRegistry*,std::vector<IRegistry*>&>( &IDataManagerSvc::objectLeaves, pObject, leaves);
  }
  STATUS objectParent(const OBJECT* pObject, IRegistry*& refpParent) override {
    return call_<const OBJECT*, IRegistry*&>( &IDataManagerSvc::objectParent, pObject, refpParent);
  }
  STATUS objectParent(const IRegistry* pObject, IRegistry*& refpParent) override {
    return call_<const IRegistry*, IRegistry*&>( &IDataManagerSvc::objectParent, pObject, refpParent);
  }
  STATUS clearSubTree(CSTR& path) override {
    return call_<CSTR&>( &IDataManagerSvc::clearSubTree, path);
  }
  STATUS clearSubTree(OBJECT* pObject) override {
    return call_<OBJECT*>( &IDataManagerSvc::clearSubTree, pObject);
  }
  STATUS clearStore() override {
    for(auto &i : m_partitions) {
      i.second.dataManager->clearStore().ignore();
    }
    if ( m_root.root.object )  {
      switch ( m_root.type )  {
        case address_type:
          m_root.root.address->release();
          break;
        case object_type:
          m_root.root.object->release();
          break;
      }
      m_root.root.object = nullptr;
    }
    m_root.path.clear();
    m_root.type = no_type;
    return STATUS::SUCCESS;
  }
  STATUS traverseSubTree(CSTR& path, AGENT* pAgent) override {
    return call_<CSTR&,AGENT*>( &IDataManagerSvc::traverseSubTree, path, pAgent);
  }
  STATUS traverseSubTree(OBJECT* pObject, AGENT* pAgent) override {
    return call_<OBJECT*,AGENT*>( &IDataManagerSvc::traverseSubTree, pObject, pAgent);
  }
  STATUS traverseTree( AGENT* pAgent ) override {
    return call_<AGENT*>( &IDataManagerSvc::traverseTree, pAgent);
  }
  STATUS setRoot( std::string path, OBJECT* pObj) override {
    if ( m_root.root.object )  {
      switch ( m_root.type )  {
        case address_type:
          m_root.root.address->release();
          break;
        case object_type:
          m_root.root.object->release();
          break;
      }
    }
    m_root.path    = std::move(path);
    m_root.type    = object_type;
    m_root.root.object  = pObj;
    preparePartitions();
    return activate(m_defaultPartition);
  }

  STATUS setRoot (std::string path, ADDRESS* pAddr) override {
    if ( m_root.root.object )  {
      switch ( m_root.type )  {
        case address_type:
          m_root.root.address->release();
          break;
        case object_type:
          m_root.root.object->release();
          break;
      }
    }
    m_root.path    = std::move(path);
    m_root.type    = address_type;
    m_root.root.address = pAddr;
    if ( m_root.root.address )  {
      m_root.root.address->addRef();
      preparePartitions();
      return activate(m_defaultPartition);
    }
    return STATUS::FAILURE;
  }
  STATUS setDataLoader(IConversionSvc* pDataLoader, IDataProviderSvc* dpsvc = nullptr) override {
    m_dataLoader = pDataLoader;
    if ( m_dataLoader ) m_dataLoader->setDataProvider(dpsvc ? dpsvc : this);
    for(auto& i : m_partitions) {
      i.second.dataManager->setDataLoader(m_dataLoader.get()).ignore();
    }
    return SUCCESS;
  }
  STATUS addPreLoadItem(const DataStoreItem& item) override {
    return call_<const DataStoreItem&>( &IDataProviderSvc::addPreLoadItem, item);
  }
  STATUS addPreLoadItem(CSTR& item) override {
    return call_<CSTR&>( &IDataProviderSvc::addPreLoadItem, item);
  }
  STATUS removePreLoadItem(const DataStoreItem& item) override {
    return call_<const DataStoreItem&>( &IDataProviderSvc::removePreLoadItem, item);
  }
  STATUS removePreLoadItem(CSTR& item) override {
    return call_<CSTR&>( &IDataProviderSvc::removePreLoadItem, item);
  }
  STATUS resetPreLoad() override {
    return call_<>( &IDataProviderSvc::resetPreLoad);
  }
  STATUS preLoad() override {
    return call_<>( &IDataProviderSvc::preLoad );
  }
  STATUS registerObject(CSTR& path, OBJECT* pObj) override {
    return registerObject(nullptr, path, pObj);
  }
  STATUS registerObject(CSTR& parent, CSTR& obj, OBJECT* pObj) override {
    return call_<CSTR&,CSTR&,OBJECT*>(&IDataProviderSvc::registerObject, parent,obj,pObj);
  }
  STATUS registerObject(CSTR& parent, int item, OBJECT* pObj) override {
    return call_<CSTR&,int,OBJECT*>( &IDataProviderSvc::registerObject, parent, item, pObj);
  }
  STATUS registerObject(OBJECT* parent, CSTR& obj, OBJECT* pObj) override {
    return call_<OBJECT*,CSTR&,OBJECT*>( &IDataProviderSvc::registerObject, parent, obj, pObj);
  }
  STATUS registerObject(OBJECT* parent, int obj, OBJECT* pObj) override {
    return call_<OBJECT*,int,OBJECT*>( &IDataProviderSvc::registerObject, parent, obj, pObj);
  }
  STATUS unregisterObject(CSTR& path) override {
    return call_<CSTR&>( &IDataProviderSvc::unregisterObject, path);
  }
  STATUS unregisterObject(CSTR& parent, CSTR& obj) override {
    return call_<CSTR&,CSTR&>( &IDataProviderSvc::unregisterObject, parent, obj);
  }
  STATUS unregisterObject(CSTR& parent, int obj) override {
    return call_<CSTR&,int>( &IDataProviderSvc::unregisterObject, parent, obj);
  }
  STATUS unregisterObject(OBJECT* pObj) override {
    return call_<OBJECT*>( &IDataProviderSvc::unregisterObject, pObj);
  }
  STATUS unregisterObject(OBJECT* pObj, CSTR& path) override {
    return call_<OBJECT*,CSTR&>( &IDataProviderSvc::unregisterObject, pObj, path);
  }
  STATUS unregisterObject(OBJECT* pObj, int item ) override {
    return call_<OBJECT*,int>( &IDataProviderSvc::unregisterObject, pObj, item);
  }
  STATUS retrieveObject(IRegistry* parent, CSTR& path, OBJECT*& pObj ) override {
    return call_<IRegistry*,CSTR&,OBJECT*&>( &IDataProviderSvc::retrieveObject, parent, path, pObj);
  }
  STATUS retrieveObject(CSTR& path, OBJECT*& pObj) override {
    return call_<CSTR&,OBJECT*&>( &IDataProviderSvc::retrieveObject, path, pObj);
  }
  STATUS retrieveObject(CSTR& parent, CSTR& path, OBJECT*& pObj ) override {
    return call_<CSTR&,CSTR&,OBJECT*&>( &IDataProviderSvc::retrieveObject, parent, path, pObj);
  }
  STATUS retrieveObject(CSTR& parent, int item, OBJECT*& pObj) override {
    return call_<CSTR&,int,OBJECT*&>( &IDataProviderSvc::retrieveObject, parent, item, pObj);
  }
  STATUS retrieveObject(OBJECT* parent, CSTR& path, OBJECT*& pObj ) override {
    return call_<OBJECT*,CSTR&,OBJECT*&>( &IDataProviderSvc::retrieveObject, parent, path, pObj);
  }
  STATUS retrieveObject(OBJECT* parent, int item, OBJECT*& pObj ) override {
    return call_<OBJECT*,int,OBJECT*&>( &IDataProviderSvc::retrieveObject, parent, item, pObj);
  }
  STATUS findObject(CSTR& path, OBJECT*& pObj) override {
    return call_<CSTR&,OBJECT*&>( &IDataProviderSvc::retrieveObject, path, pObj);
  }
  STATUS findObject(IRegistry* parent, CSTR& path, OBJECT*& pObj) override {
    return call_<IRegistry*,CSTR&,OBJECT*&>( &IDataProviderSvc::findObject, parent, path, pObj);
  }
  STATUS findObject(CSTR& parent, CSTR& path, OBJECT*& pObj) override {
    return call_<CSTR&,CSTR&,OBJECT*&>( &IDataProviderSvc::retrieveObject, parent, path, pObj);
  }
  STATUS findObject(CSTR& parent, int item, OBJECT*& pObject ) override {
    return call_<CSTR&,int,OBJECT*&>( &IDataProviderSvc::findObject, parent, item, pObject);
  }
  STATUS findObject(OBJECT* parent, CSTR& path, OBJECT*& pObject) override {
    return call_<OBJECT*,CSTR&,OBJECT*&>( &IDataProviderSvc::findObject, parent, path, pObject);
  }
  STATUS findObject(OBJECT* parent, int item, OBJECT*& pObject) override {
    return call_<OBJECT*,int,OBJECT*&>( &IDataProviderSvc::findObject, parent, item, pObject);
  }
  STATUS linkObject(IRegistry* from, CSTR& objPath, OBJECT* to) override {
    return call_<IRegistry*,CSTR&,OBJECT*>( &IDataProviderSvc::linkObject, from, objPath, to);
  }
  STATUS linkObject(CSTR& from, CSTR& objPath, OBJECT* to) override {
    return call_<CSTR&,CSTR&,OBJECT*>( &IDataProviderSvc::linkObject, from, objPath, to);
  }
  STATUS linkObject(OBJECT* from, CSTR& objPath, OBJECT* to) override {
    return call_<OBJECT*,CSTR&,OBJECT*>( &IDataProviderSvc::linkObject, from, objPath, to);
  }
  STATUS linkObject(CSTR& fullPath, OBJECT* to) override {
    return call_<CSTR&,OBJECT*>( &IDataProviderSvc::linkObject, fullPath, to);
  }
  STATUS unlinkObject(IRegistry* from, CSTR& objPath) override {
    return call_<IRegistry*,CSTR&>( &IDataProviderSvc::unlinkObject, from, objPath);
  }
  STATUS unlinkObject(CSTR& from, CSTR& objPath) override {
    return call_<CSTR&,CSTR&>( &IDataProviderSvc::unlinkObject, from, objPath);
  }
  STATUS unlinkObject(OBJECT* from, CSTR& objPath) override {
    return call_<OBJECT*,CSTR&>( &IDataProviderSvc::unlinkObject, from, objPath);
  }
  STATUS unlinkObject(CSTR& path) override {
    return call_<CSTR&>( &IDataProviderSvc::unlinkObject, path);
  }
  STATUS updateObject(IRegistry* pDirectory ) override {
    return call_<IRegistry*>( &IDataProviderSvc::updateObject, pDirectory);
  }
  STATUS updateObject(CSTR& path) override {
    return call_<CSTR&>( &IDataProviderSvc::updateObject, path);
  }
  STATUS updateObject(OBJECT* pObj ) override {
    return call_<OBJECT*>( &IDataProviderSvc::updateObject, pObj);
  }
  STATUS updateObject(CSTR& parent, CSTR& updatePath ) override {
    return call_<CSTR&,CSTR&>( &IDataProviderSvc::updateObject, parent, updatePath);
  }
  STATUS updateObject(OBJECT* parent, CSTR& updatePath) override {
    return call_<OBJECT*,CSTR&>( &IDataProviderSvc::updateObject, parent, updatePath);
  }

  STATUS create(CSTR& nam, CSTR& typ) override {
    IInterface* pPartition = nullptr;
    return create(nam, typ, pPartition);
  }
  STATUS create(CSTR& nam, CSTR& typ, IInterface*& pPartition) override {
    if ( get(nam, pPartition).isSuccess() )  return PARTITION_EXISTS;
    auto isvc = serviceLocator()->service<IService>(typ);
    if (!isvc) return NO_INTERFACE;
    auto dataMgr = isvc.as<IDataManagerSvc>();
    auto dataProv = isvc.as<IDataProviderSvc>();
    if ( !dataMgr || !dataProv ) return NO_INTERFACE;
    m_partitions.emplace( nam, Partition{ dataProv, dataMgr, nam }  );
    return STATUS::SUCCESS;
  }

  STATUS drop(CSTR& nam) override {
    auto i = m_partitions.find(nam);
    if ( i == m_partitions.end() )  return PARTITION_NOT_PRESENT;
    if ( i->second.dataManager == m_current.dataManager )  {
      m_current = Partition();
    }
    i->second.dataManager->clearStore().ignore();
    m_partitions.erase(i);
    return STATUS::SUCCESS;
  }

  STATUS drop(IInterface* pPartition) override {
    auto provider = SmartIF<IDataProviderSvc>(pPartition);
    if ( !provider )  return NO_INTERFACE;
    auto i = std::find_if( std::begin(m_partitions), std::end(m_partitions),
                           [&](Partitions::const_reference p) {
        return p.second.dataProvider == provider;
    } );
    if (i==std::end(m_partitions)) return PARTITION_NOT_PRESENT;
    i->second.dataManager->clearStore().ignore();
    m_partitions.erase(i);
    return STATUS::SUCCESS;
  }

  STATUS activate(CSTR& nam) override {
    auto i = m_partitions.find(nam);
    if ( i != m_partitions.end() )  {
      m_current = i->second;
      return STATUS::SUCCESS;
    }
    m_current = Partition();
    return PARTITION_NOT_PRESENT;
  }

  STATUS activate(IInterface* pPartition) override {
    auto provider = SmartIF<IDataProviderSvc>(pPartition);
    m_current = Partition();
    if ( !provider )  return NO_INTERFACE;
    auto i = std::find_if(std::begin(m_partitions), std::end(m_partitions),
                          [&](Partitions::const_reference p) {
            return p.second.dataProvider == provider;
    } );
    if (i == std::end(m_partitions)) return PARTITION_NOT_PRESENT;
    m_current = i->second;
    return STATUS::SUCCESS;
  }

  STATUS get(CSTR& nam, IInterface*& pPartition) const override {
    auto i = m_partitions.find(nam);
    if ( i != m_partitions.end() )  {
      pPartition = i->second.dataProvider;
      return STATUS::SUCCESS;
    }
    pPartition = nullptr;
    return PARTITION_NOT_PRESENT;
  }

  StatusCode activePartition(std::string& nam, IInterface*& pPartition) const override {
    if ( m_current.dataProvider )  {
      nam = m_current.name;
      pPartition = m_current.dataProvider;
      return STATUS::SUCCESS;
    }
    nam.clear();
    pPartition = nullptr;
    return NO_ACTIVE_PARTITION;
  }

  STATUS attachServices()  {
    // Attach address creator facility
    m_addrCreator = service(m_loader, true);
    if (!m_addrCreator) {
      error()
          << "Failed to retrieve data loader "
          << "\"" << m_loader << "\"" << endmsg;
      return StatusCode::FAILURE;
    }
    // Attach data loader facility
    auto dataLoader = service<IConversionSvc>(m_loader, true);
    if (!dataLoader) {
      error() << "Failed to retrieve data loader "
          << "\"" << m_loader << "\"" << endmsg;
      return StatusCode::FAILURE;
    }
    auto sc = setDataLoader(dataLoader.get());
    if (!sc.isSuccess()) {
      error() << "Failed to set data loader "
          << "\"" << m_loader << "\"" << endmsg;
    }
    return sc;
  }

  STATUS detachServices()  {
    m_addrCreator.reset();
    m_dataLoader.reset();
    return STATUS::SUCCESS;
  }

  STATUS initialize() override {
    // Nothing to do: just call base class initialisation
    STATUS sc = Service::initialize();
    if ( !sc.isSuccess() )  return sc;
    sc = makePartitions();
    if (!sc.isSuccess()) {
      error() << "Failed to connect to all store partitions." << endmsg;
      return sc;
    }
    return attachServices();
  }

  STATUS reinitialize() override {
    STATUS sc = Service::reinitialize();
    if (!sc.isSuccess()) {
      error() << "Enable to reinitialize base class"
          << endmsg;
      return sc;
    }
    detachServices();
    sc = attachServices();
    if ( !sc.isSuccess() )  {
      error() << "Failed to attach necessary services." << endmsg;
      return sc;
    }
    sc = makePartitions();
    if (!sc.isSuccess()) {
      error() << "Failed to connect to store partitions." << endmsg;
      return sc;
    }
    // return
    return STATUS::SUCCESS;
  }

  STATUS finalize() override {
    setDataLoader(nullptr).ignore();
    clearStore().ignore();
    clearPartitions().ignore();
    m_current = Partition();
    detachServices();
    return Service::finalize();
  }


//protected:

  MultiStoreSvc( CSTR& name, ISvcLocator* svc )
  : base_class(name,svc)
  {
    declareProperty("RootCLID",         m_rootCLID = 110);
    declareProperty("RootName",         m_rootName = "/Event");
    declareProperty("Partitions",       m_partitionDefs);
    declareProperty("DataLoader",       m_loader="EventPersistencySvc");
    declareProperty("DefaultPartition", m_defaultPartition="Default");
  }

  ~MultiStoreSvc() override {
    setDataLoader(nullptr).ignore();
    resetPreLoad().ignore();
    clearStore().ignore();
    clearPartitions().ignore();
  }

  STATUS preparePartitions()  {
    STATUS iret = STATUS::SUCCESS;
    for(auto& i : m_partitions) {
      STATUS sc = STATUS::FAILURE;
      switch ( m_root.type )  {
        case address_type:
          if ( m_root.root.address )  {
            ADDRESS* pAdd = nullptr;
            ADDRESS* p = m_root.root.address;
            sc = m_addrCreator->createAddress(p->svcType(),
                                              p->clID(),
                                              p->par(),
                                              p->ipar(),
                                              pAdd);
            if ( sc.isSuccess() )  {
            sc = i.second.dataManager->setRoot(m_root.path, pAdd);
            }
          }
          break;
        case object_type:
          if ( m_root.root.object )  {
            if ( m_root.root.object->clID() == CLID_DataObject )  {
              sc = i.second.dataManager->setRoot(m_root.path, new DataObject());
            }
          }
          break;
        default:
          sc = STATUS::FAILURE;
          break;
      }
      if ( !sc.isSuccess() )  iret = sc;
    }
    return iret;
  }

  STATUS clearPartitions()  {
    for(auto &i : m_partitions) i.second.dataManager->clearStore().ignore();
    m_partitions.clear();
    return STATUS::SUCCESS;
  }

  STATUS makePartitions()  {
    using Parser = Gaudi::Utils::AttribStringParser;
    std::string typ, nam;
    clearPartitions().ignore();
    for(auto part: m_partitionDefs)  {
      for(auto attrib: Parser(std::move(part)))   {
        switch( ::toupper(attrib.tag[0]) )    {
        case 'N':
          nam = std::move(attrib.value);
          break;
        case 'T':
          typ = std::move(attrib.value);
          break;
        }
      }
      STATUS sc = create(nam, typ);
      if ( !sc.isSuccess() )  return sc;
      if ( m_defaultPartition.empty() )  m_defaultPartition = nam;
    }
    return STATUS::SUCCESS;
  }
};

// Instantiation of a static factory class used by clients to create
// instances of this service
DECLARE_COMPONENT(MultiStoreSvc)