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Registering a High-Performance Provider

  • Стаття

Like other instance providers, you register a high-performance provider with Microsoft Windows Management Instrumentation (WMI) by creating an instance of the __Win32Provider and __InstanceProviderRegistration classes. The __Win32Provider instance defines the provider's physical implementation, and the __InstanceProviderRegistration instance defines the provider's feature set. For more information, see Registering a Provider.

The following procedure describes how to register a high-performance instance provider.

To register a high-performance instance provider

  1. Create an instance of the __Win32Provider class describing the provider.

    Be sure to add a ClientLoadableCLSID property to the __Win32Provider instance. If both the provider and client reside on the same computer, WMI loads the provider in-process to the client using ClientLoadableCLSID as the class identifier. When the provider and client reside on different computers, WMI loads the provider in-process to WMI. WMI also uses ClientLoadableCLSID to support refresh operations.

  2. Create an instance of the __InstanceProviderRegistration class that describes the feature set of the provider.

    Be sure to tag the class with both the Dynamic and Provider qualifiers. The Dynamic qualifier signals that WMI should use a provider to retrieve the class instances. The Provider qualifier specifies the name of the provider that WMI should use.

    A high-performance provider also needs to state support for operations, enumeration operations, or both. Make sure you use the SupportsGet and SupportsEnumeration properties in your implementation.

The following code example shows you how to implement the __Win32Provider and __InstanceProviderRegistration classes for a high-performance provider.

instance of __Win32Provider as $P
{
    Name="TestProv";
    CLSID="{A41602A4-C038-11d1-AEB6-00C04FB68820}";
    ClientLoadableCLSID="{423B32C9-B033-4242-EFB6-55C044242821}";
};

instance of __InstanceProviderRegistration
{
    Provider = $P;
    SupportsGet = TRUE;
    SupportsEnumeration = TRUE;
};

[ dynamic, 
  provider("TestProv")
]

class TestClass
{
    [key] string KeyVal;
    
    string StrVal1;

    sint32 IntVal1;
    sint32 IntVal2;

    sint32 IntArray2[];
};

Making an Instance Provider into a High-Performance Provider