mirror of
https://github.com/unclechu/gRPC-haskell.git
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096d399b30
* (wip) Change ClientRWHandler to use an IO action for metadata acqui * Demonstrate placement of WaitForInitialMetadata() in hellos_client * Make hellos cpp server always send metadata first, for now * Show getMD placement in haskell hellos-client * Add prelim bidi metadata exchange behavior tweaks to line up with C++ API conventions
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
#include <iostream>
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#include <memory>
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#include <string>
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#include <grpc++/grpc++.h>
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#include "hellos.grpc.pb.h"
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using grpc::Server;
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using grpc::ServerBuilder;
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using grpc::ServerContext;
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using grpc::ServerWriter;
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using grpc::ServerReader;
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using grpc::ServerReaderWriter;
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using grpc::Status;
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using hellos::SSRqt;
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using hellos::SSRpy;
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using hellos::CSRqt;
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using hellos::CSRpy;
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using hellos::BiRqtRpy;
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using hellos::Hellos;
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static void Die(const std::string& msg) {
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std::cerr << "Fatal error: " << msg << std::endl;
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exit(1);
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}
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class HellosImpl final : public Hellos::Service {
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Status HelloSS(ServerContext* context,
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const SSRqt* rqt,
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ServerWriter<SSRpy>* writer) override {
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for (unsigned i = 0; i < rqt->num_replies(); ++i) {
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SSRpy rpy;
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rpy.set_greeting("Hello there, " + rqt->name() + "!");
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writer->Write(rpy);
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}
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return Status::OK;
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}
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Status HelloCS(ServerContext* context,
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ServerReader<CSRqt>* reader,
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CSRpy* rpy) override {
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CSRqt rqt;
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unsigned rqtCnt = 0;
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std::string ex("client streaming payload");
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while (reader->Read(&rqt)) {
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if (rqt.message() != ex)
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Die("HelloCS/rpy: expected payload '" + ex +
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"', got '" + rqt.message() + "'");
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++rqtCnt;
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}
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rpy->set_num_requests(rqtCnt);
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return Status::OK;
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}
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Status HelloBi(ServerContext* context,
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ServerReaderWriter<BiRqtRpy, BiRqtRpy>* strm) override {
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BiRqtRpy rqt;
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strm->SendInitialMetadata();
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while (strm->Read(&rqt)) {
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strm->Write(rqt);
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}
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return Status::OK;
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}
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};
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void RunServer() {
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std::string server_address("0.0.0.0:50051");
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HellosImpl service;
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ServerBuilder builder;
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// Listen on the given address without any authentication mechanism.
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builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
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// Register "service" as the instance through which we'll communicate with
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// clients. In this case it corresponds to an *synchronous* service.
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builder.RegisterService(&service);
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// Finally assemble the server.
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std::unique_ptr<Server> server(builder.BuildAndStart());
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std::cout << "Server listening on " << server_address << std::endl;
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// Wait for the server to shutdown. Note that some other thread must be
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// responsible for shutting down the server for this call to ever return.
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server->Wait();
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}
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int main(int argc, char** argv) {
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RunServer();
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return 0;
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}
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