Package io.grpc.stub
Class MetadataUtils.HeaderAttachingClientInterceptor
java.lang.Object
io.grpc.stub.MetadataUtils.HeaderAttachingClientInterceptor
- All Implemented Interfaces:
ClientInterceptor
- Enclosing class:
MetadataUtils
private static final class MetadataUtils.HeaderAttachingClientInterceptor
extends Object
implements ClientInterceptor
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionprivate final class
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescription<ReqT,
RespT>
ClientCall<ReqT, RespT> interceptCall
(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next)
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Field Details
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extraHeaders
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Constructor Details
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HeaderAttachingClientInterceptor
HeaderAttachingClientInterceptor(Metadata extraHeaders)
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Method Details
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interceptCall
public <ReqT,RespT> ClientCall<ReqT,RespT> interceptCall(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) Description copied from interface:ClientInterceptor
InterceptClientCall
creation by thenext
Channel
.Many variations of interception are possible. Complex implementations may return a wrapper around the result of
next.newCall()
, whereas a simpler implementation may just modify the header metadata prior to returning the result ofnext.newCall()
.next.newCall()
must not be called under a differentContext
other than the currentContext
. The outcome of such usage is undefined and may cause memory leak due to unbounded chain ofContext
s.- Specified by:
interceptCall
in interfaceClientInterceptor
- Parameters:
method
- the remote method to be called.callOptions
- the runtime options to be applied to this call.next
- the channel which is being intercepted.- Returns:
- the call object for the remote operation, never
null
.
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