protocol-buffers

问题 I am trying to set up a basic communication system between client and server using ZMQ. I am using protobuf for the message format. My problem is when I send the message from client the message size is 34 but the message size received on the server is 0. Following is my code; Client.cpp tutorial::Person person; person.set_id(1234); person.set_name("john"); person.set_email("john@mxyz.com"); person.set_phonenumber("12345678"); zmq::context_t context (1); // Prepare our context and socket zmq:

问题 I am trying to compile some generated proto.cc files on Solaris 10 SPARC 64. And I get these errors: "/apps/pkgs/studio-11.0.13/prod/include/CC/stlport4/stl/_alloc.h", line 134: Error: The function "__stl_new" must have a prototype. "/apps/pkgs/studio-11.0.13/prod/include/CC/stlport4/stl/_alloc.h", line 135: Error: The function "__stl_delete" must have a prototype. "/apps/pkgs/studio-11.0.13/prod/include/CC/stlport4/./stdexcept", line 52: Error: _STLP_EXCEPTION_BASE is not defined. Compiler

问题 The object[] mList holds whatever objects that the child collection wants it to. This is supposed to be a dummy wrapper class for the rest of the more specified collections of objects. [ProtoInclude(98, typeof(Object1CollectionProto))] [ProtoInclude(99, typeof(Object2CollectionProto))] [ProtoInclude(100, typeof(Object3CollectionProto))] public class ObjectCollectionProto { protected ObjectType mCollectionType; protected object[] mList; public ObjectCollectionProto(){} [ProtoMember(1),

问题 I created entities on datastore using the AppEngine SDK's python APIs and I'd like to retrieve them on Google Cloud Dataflow (Java). The entity's structure is something like this: entity embedded_entity (ndb.StructuredProperty(repeated=True)) name name name name Retrieving would be something like this, but I know I am missing the step where I extract the data. static class EmbeddedStringExtractor extends DoFn<Entity, String> { @Override public void processElement(ProcessContext c) { Map

问题 I am using Google Protocol Buffer for message serialization. This is my sample proto file content. package MessageParam; message Sample { message WordRec { optional uint64 id = 1; optional string word = 2; optional double value = 3; } message WordSequence { repeated WordRec WordSeq = 1; } } I am trying to serialize the message in C++ like following MessageParam::Sample::WordSequence wordseq; for(int i =0;i<10;i++) { AddRecords(wordseq.add_wordseq()); } std::string str = wordseq

问题 For this python program running protobuf encoding when encoded gives following output: 0a 10 08 7f 8a 01 04 08 02 10 03 92 01 04 08 02 10 03 18 01 What I don't understand is why there is a 01 after 8a, and again why 01 after 92. Seems for information element of type oneof, extra 01 is added, but why? Please help me, if any body understands protobuf encoding import sys import test2_pb2 def write_to_file(file,value): with open(file, "wb") as f: f.write(value) def cell_test_dct(): msg=test2_pb2

问题 I'm new to protobuf and fairly new to asp .net. so I might need help on this. I have this code snippet for my PersonsController: public class PersonController : ApiController { [ProtoContract] public class Person { [ProtoMember(1)] public int ID { get; set; } [ProtoMember(2)] public string First { get; set; } [ProtoMember(3)] public string Last { get; set; } } // GET api/values public IEnumerable<Person> Get() { List<Person> myList = new List<Person> { new Person { ID = 0, First = "Judy",

问题 Is it possible to read protobuf message from kafka using spark structured streaming? 回答1: Approach 1 sparkSession.udf().register("deserialize", getDeserializer(), schema); DataStreamReader dataStreamReader = sparkSession.readStream().format("kafka"); for (Map.Entry<String, String> kafkaPropEntry : kafkaProps.entrySet()) { dataStreamReader.option(kafkaPropEntry.getKey(), kafkaPropEntry.getValue()); } Dataset<Row> kafkaRecords = dataStreamReader.load() .selectExpr("deserialize(value) as event")

问题 protobuf.min.js:63 Uncaught Error: Illegal wire type for field Message.Field .Data_new.vert: 5 (2 expected) I get this message when I try to decode my binary file with protobuf. vert.proto: message Vertice_new{ repeated float values = 1 [packed = true]; } message Data_new{ repeated Vertice_new vert = 1; } and in cpp i just put in a lot of raw data in the form of x,y,z,stress,strain ... and so on which are all floats and when I try to decode it on javascript side I get this weird message, it

问题 I am new to protobuf usage. i am planning to write protobuf def with enum(s) in it. is there any way to provide id, value and as well description in it. after compilation i want generated enum should be equivalent as below example enum Sample{ W(0, "W"), P(0, "P"), C(0, "C"), B(0, "B") private final int id; private final String value; private Status(int id, String value) { this.id= id; this.value = value; } } Any help is very appreciated. 回答1: There is no way to generate exactly the Java enum