Class CallInvokerExtensions

Extends the CallInvoker class to provide the interceptor facility on the client side.

Inheritance

System.Object

CallInvokerExtensions

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: Grpc.Core.Interceptors

Assembly: Grpc.Core.Api.dll

Syntax

public static class CallInvokerExtensions

Methods

Intercept(CallInvoker, Interceptor)

Returns a CallInvoker instance that intercepts the invoker with the given interceptor.

Declaration

public static CallInvoker Intercept(this CallInvoker invoker, Interceptor interceptor)

Parameters

Type	Name	Description
CallInvoker	invoker	The underlying invoker to intercept.
Interceptor	interceptor	The interceptor to intercept calls to the invoker with.

Returns

Type	Description
CallInvoker

Remarks

Multiple interceptors can be added on top of each other by calling "invoker.Intercept(a, b, c)". The order of invocation will be "a", "b", and then "c". Interceptors can be later added to an existing intercepted CallInvoker, effectively building a chain like "invoker.Intercept(c).Intercept(b).Intercept(a)". Note that in this case, the last interceptor added will be the first to take control.

Intercept(CallInvoker, Interceptor[])

Returns a CallInvoker instance that intercepts the invoker with the given interceptors.

Declaration

public static CallInvoker Intercept(this CallInvoker invoker, params Interceptor[] interceptors)

Parameters

Type	Name	Description
CallInvoker	invoker	The channel to intercept.
Interceptor[]	interceptors	An array of interceptors to intercept the calls to the invoker with. Control is passed to the interceptors in the order specified.

Returns

Type	Description
CallInvoker

Remarks

Multiple interceptors can be added on top of each other by calling "invoker.Intercept(a, b, c)". The order of invocation will be "a", "b", and then "c". Interceptors can be later added to an existing intercepted CallInvoker, effectively building a chain like "invoker.Intercept(c).Intercept(b).Intercept(a)". Note that in this case, the last interceptor added will be the first to take control.

Intercept(CallInvoker, Func<Metadata, Metadata>)

Returns a CallInvoker instance that intercepts the invoker with the given interceptor.

Declaration

public static CallInvoker Intercept(this CallInvoker invoker, Func<Metadata, Metadata> interceptor)

Parameters

Type	Name	Description
CallInvoker	invoker	The underlying invoker to intercept.
System.Func<Metadata, Metadata>	interceptor	An interceptor delegate that takes the request metadata to be sent with an outgoing call and returns a Metadata instance that will replace the existing invocation metadata.

Returns

Type	Description
CallInvoker

Remarks

Multiple interceptors can be added on top of each other by building a chain like "invoker.Intercept(c).Intercept(b).Intercept(a)". Note that in this case, the last interceptor added will be the first to take control.