Class CallInvokerExtensions
Extends the CallInvoker class to provide the interceptor facility on the client side.
Inheritance
Namespace: Grpc.Core.Interceptors
Assembly: Grpc.Core.Api.dll
Syntax
public static class CallInvokerExtensions : objectMethods
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. |
| 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.
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.