Java 类io.grpc.Contexts 实例源码

@Override
public <ReqT, RespT> Listener<ReqT> interceptCall(ServerCall<ReqT, RespT> call, Metadata headers, ServerCallHandler<ReqT, RespT> next) {
    String clientId = headers.get(CLIENT_ID_HEADER_KEY);
    if (clientId == null || !authenticator.authenticate(clientId)) {
        call.close(Status.UNAUTHENTICATED.withDescription("Invalid or unknown client: " + clientId), headers);
        return NOOP_LISTENER;
    }
    Context context = Context.current().withValue(CLIENT_ID_CONTEXT_KEY, clientId);
    return Contexts.interceptCall(context, call, headers, next);
}

@Override
public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(ServerCall<ReqT, RespT> call,
    final Metadata requestHeaders, ServerCallHandler<ReqT, RespT> next) {

  Context context = Context.current().withValue(MINI_DEVICE_INFO, requestHeaders.get(miniDeviceInfoKey));

  return Contexts.interceptCall(context, call, requestHeaders, next);
}

@Override
public <ReqT, RespT> Listener<ReqT> interceptCall(
    ServerCall<ReqT, RespT> call, Metadata headers, ServerCallHandler<ReqT, RespT> next) {
  RequestMetadata meta = headers.get(METADATA_KEY);
  if (meta == null) {
    throw new IllegalStateException("RequestMetadata not received from the client.");
  }
  Context ctx = Context.current().withValue(CONTEXT_KEY, meta);
  return Contexts.interceptCall(ctx, call, headers, next);
}