Update main_rpc_client.cpp

rpc/src/main_rpc_client.cpp

@@ -54,26 +54,29 @@ UPayload sendRPC(UUri& uri) {
     uint8_t buffer[BUFFER_SIZE] = {0}; 
 
     UPayload payload(buffer, sizeof(buffer), UPayloadType::VALUE);
-
+    /* send the RPC request , a future is returned from invokeMethod */
     std::future<UPayload> result = ZenohRpcClient::instance().invokeMethod(uri, payload, attributes);
 
     if (!result.valid()) {
         spdlog::error("Future is invalid");
         return UPayload(nullptr, 0, UPayloadType::UNDEFINED);   
     }
-
+    /* wait for the future to be fullfieled - it is possible also to specify a timeout for the future */
     result.wait();
 
     return result.get();
 }
 
+/* The sample RPC client applications demonstrates how to send RPC requests and wait for the response -
+ * The response in this example will be the current time */
 int main(int argc, char** argv) {
 
     signal(SIGINT, signalHandler);
 
     UStatus status;
     ZenohRpcClient *rpcClient = &ZenohRpcClient::instance();
 
+    /* init RPC client */
     status = rpcClient->init();
     if (UCode::OK != status.code()) {
         spdlog::error("init failed");
@@ -96,6 +99,7 @@ int main(int argc, char** argv) {
         sleep(1);
     }
 
+    /* term RPC client */
     status = rpcClient->term();
     if (UCode::OK != status.code()) {
         spdlog::error("term failed");