connectivity/source/drivers/jdbc/jservices.cxx

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  28
  29 #include "java/sql/Driver.hxx"
  30 #include <cppuhelper/factory.hxx>
  31
  32 using namespace connectivity;
  33 using ::rtl::OUString;
  34 using ::com::sun::star::uno::Reference;
  35 using ::com::sun::star::uno::Sequence;
  36 using ::com::sun::star::lang::XSingleServiceFactory;
  37 using ::com::sun::star::lang::XMultiServiceFactory;
  38
  39 typedef Reference< XSingleServiceFactory > (SAL_CALL *createFactoryFunc)
  40         (
  41             const Reference< XMultiServiceFactory > & rServiceManager,
  42             const OUString & rComponentName,
  43             ::cppu::ComponentInstantiation pCreateFunction,
  44             const Sequence< OUString > & rServiceNames,
  45             rtl_ModuleCount* _pModCount
  46         );
  47
  48 //---------------------------------------------------------------------------------------
  49 struct ProviderRequest
  50 {
  51     Reference< XSingleServiceFactory > xRet;
  52     Reference< XMultiServiceFactory > const xServiceManager;
  53     OUString const sImplementationName;
  54
  55     ProviderRequest(
  56         void* pServiceManager,
  57         sal_Char const* pImplementationName
  58     )
  59     : xServiceManager(reinterpret_cast<XMultiServiceFactory*>(pServiceManager))
  60     , sImplementationName(OUString::createFromAscii(pImplementationName))
  61     {
  62     }
  63
  64     inline
  65     sal_Bool CREATE_PROVIDER(
  66                 const OUString& Implname,
  67                 const Sequence< OUString > & Services,
  68                 ::cppu::ComponentInstantiation Factory,
  69                 createFactoryFunc creator
  70             )
  71     {
  72         if (!xRet.is() && (Implname == sImplementationName))
  73         try
  74         {
  75             xRet = creator( xServiceManager, sImplementationName,Factory, Services,0);
  76         }
  77         catch(...)
  78         {
  79         }
  80         return xRet.is();
  81     }
  82
  83     void* getProvider() const { return xRet.get(); }
  84 };
  85
  86 extern "C" SAL_DLLPUBLIC_EXPORT void SAL_CALL
  87 component_getImplementationEnvironment(
  88     char const ** ppEnvTypeName, uno_Environment **)
  89 {
  90     // Recent Java 6 VMs make calls to JNI Attach/DetachCurrentThread (which
  91     // this code does extensively) very expensive.  A follow-up JVM fix reduced
  92     // the overhead significantly again for all threads but the main thread.  So
  93     // a quick hack to improve performance of this component again is to confine
  94     // it in the affine apartment (where all code will run on a single,
  95     // dedicated thread that is guaranteed no to be the main thread).  However,
  96     // a better fix would still be to redesign the code so that it does not call
  97     // Attach/DetachCurrentThread so frequently:
  98     *ppEnvTypeName = CPPU_CURRENT_LANGUAGE_BINDING_NAME ":affine";
  99 }
 100
 101 extern "C" SAL_DLLPUBLIC_EXPORT void* SAL_CALL component_getFactory(
 102                     const sal_Char* pImplementationName,
 103                     void* pServiceManager,
 104                     void* /*pRegistryKey*/)
 105 {
 106     void* pRet = 0;
 107     if (pServiceManager)
 108     {
 109         ProviderRequest aReq(pServiceManager,pImplementationName);
 110
 111         aReq.CREATE_PROVIDER(
 112             java_sql_Driver::getImplementationName_Static(),
 113             java_sql_Driver::getSupportedServiceNames_Static(),
 114             java_sql_Driver_CreateInstance,
 115             ::cppu::createSingleFactory);
 116
 117         if(aReq.xRet.is())
 118             aReq.xRet->acquire();
 119         pRet = aReq.getProvider();
 120     }
 121
 122     return pRet;
 123 }
 124
 125
 126
 127
 128
 129 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */