How to use

withRequestParamsDynamicHeaderOption

method

in

com.google.api.gax.grpc.GrpcCallContext

 private ApiCallContext contextWithParamsEncoder(RequestT request, ApiCallContext inputContext) {
  return GrpcCallContext.createDefault()
    .nullToSelf(inputContext)
    .withRequestParamsDynamicHeaderOption(paramsEncoder.encode(request));
 }
}

 private ApiCallContext contextWithParamsEncoder(RequestT request, ApiCallContext inputContext) {
  return GrpcCallContext.createDefault()
    .nullToSelf(inputContext)
    .withRequestParamsDynamicHeaderOption(paramsEncoder.encode(request));
 }
}

 @Override
 public ApiFuture<ResponseT> futureCall(RequestT request, ApiCallContext inputContext) {
  GrpcCallContext newCallContext =
    GrpcCallContext.createDefault()
      .nullToSelf(inputContext)
      .withRequestParamsDynamicHeaderOption(paramsEncoder.encode(request));

  return callable.futureCall(request, newCallContext);
 }
}

 @Override
 public ApiFuture<ResponseT> futureCall(RequestT request, ApiCallContext inputContext) {
  GrpcCallContext newCallContext =
    GrpcCallContext.createDefault()
      .nullToSelf(inputContext)
      .withRequestParamsDynamicHeaderOption(paramsEncoder.encode(request));

  return callable.futureCall(request, newCallContext);
 }
}

@Test
public void testWithRequestParamsDynamicHeaderOption() {
 String encodedRequestParams = "param1=value&param2.param3=value23";
 GrpcCallContext context =
   GrpcCallContext.createDefault().withRequestParamsDynamicHeaderOption(encodedRequestParams);
 Map<Key<String>, String> headers =
   CallOptionsUtil.getDynamicHeadersOption(context.getCallOptions());
 assertEquals(
   ImmutableMap.of(CallOptionsUtil.REQUEST_PARAMS_HEADER_KEY, encodedRequestParams), headers);
}