Updated to more closely mimic greeter_async_client.cc. Fixed typos in comments.

pull/6430/head
Michael Yeh 9 years ago
parent 470cbd1c6e
commit f9b89b181d
  1. 8
      examples/cpp/helloworld/greeter_async_client.cc
  2. 37
      examples/cpp/helloworld/greeter_async_client2.cc

@ -53,7 +53,7 @@ class GreeterClient {
explicit GreeterClient(std::shared_ptr<Channel> channel)
: stub_(Greeter::NewStub(channel)) {}
// Assambles the client's payload, sends it and presents the response back
// Assembles the client's payload, sends it and presents the response back
// from the server.
std::string SayHello(const std::string& user) {
// Data we are sending to the server.
@ -74,9 +74,9 @@ class GreeterClient {
// Storage for the status of the RPC upon completion.
Status status;
// stub_->AsyncSayHello() perform the RPC call, returning an instance we
// store in "rpc". Because we are using the asynchronous API, we need the
// hold on to the "rpc" instance in order to get updates on the ongoig RPC.
// stub_->AsyncSayHello() performs the RPC call, returning an instance we
// store in "rpc". Because we are using the asynchronous API, we need to
// hold on to the "rpc" instance in order to get updates on the ongoing RPC.
std::unique_ptr<ClientAsyncResponseReader<HelloReply> > rpc(
stub_->AsyncSayHello(&context, request, &cq));

@ -54,42 +54,49 @@ class GreeterClient {
explicit GreeterClient(std::shared_ptr<Channel> channel)
: stub_(Greeter::NewStub(channel)) {}
// Assambles the client's payload, sends it and presents the response back
// from the server.
// Assembles the client's payload and sends it to the server.
void SayHello(const std::string& user) {
// Data we are sending to the server.
HelloRequest request;
request.set_name(user);
// Call object to store rpc data
AsyncClientCall* call = new AsyncClientCall;
// stub_->AsyncSayHello() perform the RPC call, returning an instance we
// store in "rpc". Because we are using the asynchronous API, we need the
// hold on to the "rpc" instance in order to get updates on the ongoing RPC.
// stub_->AsyncSayHello() performs the RPC call, returning an instance to
// store in "call". Because we are using the asynchronous API, we need to
// hold on to the "call" instance in order to get updates on the ongoing RPC.
call->response_reader = stub_->AsyncSayHello(&call->context, request, &cq_);
// Request that, upon completion of the RPC, "reply" be updated with the
// server's response; "status" with the indication of whether the operation
// was successful. Tag the request with the memory address of call object.
// was successful. Tag the request with the memory address of the call object.
call->response_reader->Finish(&call->reply, &call->status, (void*)call);
}
// Loop while listening for completed responses
void AsyncCompleteRpc()
{
// Loop while listening for completed responses.
// Prints out the response from the server.
void AsyncCompleteRpc() {
void* got_tag;
bool ok = false;
// Block until the next result is available in the completion queue "cq".
while (cq_.Next(&got_tag, &ok))
{
while (cq_.Next(&got_tag, &ok)) {
// The tag in this example is the memory location of the call object
AsyncClientCall* call = static_cast<AsyncClientCall*>(got_tag);
if (ok)
// Verify that the request was completed successfully. Note that "ok"
// corresponds solely to the request for updates introduced by Finish().
GPR_ASSERT(ok);
if (call->status.ok())
std::cout << "Greeter received: " << call->reply.message() << std::endl;
else
std::cout << "RPC failed" << std::endl;
// Once we're complete, deallocate the call object.
delete call;
}
}
@ -97,8 +104,7 @@ class GreeterClient {
private:
// struct for keeping state and data information
struct AsyncClientCall
{
struct AsyncClientCall {
// Container for the data we expect from the server.
HelloReply reply;
@ -135,8 +141,7 @@ int main(int argc, char** argv) {
// Spawn reader thread that loops indefinitely
std::thread thread_ = std::thread(&GreeterClient::AsyncCompleteRpc, &greeter);
for (int i = 0; i < 100; i++)
{
for (int i = 0; i < 100; i++) {
std::string user("world " + std::to_string(i));
greeter.SayHello(user); // The actual RPC call!
}

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