Class GrpcResponseMetadata (2.12.2)

public class GrpcResponseMetadata implements ResponseMetadataHandler

GrpcResponseMetadata provides a mechanism to access the headers and trailers returned by a gRPC client method.

NOTE: the GrpcResponseMetadata class is not thread-safe and should NOT be re-used for multiple calls. A new instance of GrpcResponseMetadata should be constructed for each call that requires metadata to be accessed.

Example usage:

 
 GrpcResponseMetadata grpcResponseMetadata = new GrpcResponseMetadata();
 Foo foo = client.getFooCallable().call(getFooRequest, grpcResponseMetadata.createContextWithHandlers());
 Metadata headers = grpcResponseMetadata.getMetadata();
 Metadata trailers = grpcResponseMetadata.getTrailingMetadata();

Inheritance

java.lang.Object > GrpcResponseMetadata

Implements

ResponseMetadataHandler

Inherited Members

Object.clone()

Object.equals(Object)

Object.finalize()

Object.getClass()

Object.hashCode()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

Constructors

GrpcResponseMetadata()

public GrpcResponseMetadata()

Methods

addHandlers(ApiCallContext apiCallContext)

public GrpcCallContext addHandlers(ApiCallContext apiCallContext)

Constructs a new call context from an existing ApiCallContext, and sets the CallOptions to add handlers to retrieve the headers and trailers, and make them available via the getMetadata and getTrailingMetadata methods.

Parameter

Name	Description
apiCallContext	`ApiCallContext`

Returns

Type	Description
GrpcCallContext

createContextWithHandlers()

public GrpcCallContext createContextWithHandlers()

Constructs a new call context and sets the CallOptions to add handlers to retrieve the headers and trailers, and make them available via the getMetadata and getTrailingMetadata methods.

Returns

Type	Description
GrpcCallContext

getMetadata()

public Metadata getMetadata()

Returns the headers from the gRPC method as Metadata. If the call has not completed, will return null.

Returns

Type	Description
io.grpc.Metadata

getTrailingMetadata()

public Metadata getTrailingMetadata()

Returns the trailers from the gRPC method as Metadata. If the call has not completed, will return null.

Returns

Type	Description
io.grpc.Metadata

onHeaders(Metadata metadata)

public void onHeaders(Metadata metadata)

Handle the headers returned by an RPC.

Parameter

Name	Description
metadata	`io.grpc.Metadata`

onTrailers(Metadata metadata)

public void onTrailers(Metadata metadata)

Handle the trailers returned by an RPC.

Parameter

Name	Description
metadata	`io.grpc.Metadata`