Print message that marian-server is listening on port X after it is accepting connections (#705)

* Print 'server is listening' after it is accepting connections; fix #701
* Minor code formatting

CHANGELOG.md

@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Internal optional parameter in n-best list generation that skips empty hypotheses.
 
 ### Fixed
+- Print "server is listening on port" message after it is accepting connections
 - Fix compilation without BLAS installed
 - Providing a single value to vector-like options using the equals sign, e.g. --models=model.npz
 - Fix quiet-translation in marian-server

src/command/marian_server.cpp

@@ -37,9 +37,8 @@ int main(int argc, char **argv) {
 
     // Send translation back
     connection->send(sendStream, [](const SimpleWeb::error_code &ec) {
-      if(ec) {
+      if(ec)
         LOG(error, "Error sending message: ({}) {}", ec.value(), ec.message());
-      }
     });
   };
 
@@ -52,8 +51,9 @@ int main(int argc, char **argv) {
 
   // Start server thread
   std::thread serverThread([&server]() {
-    LOG(info, "Server is listening on port {}", server.config.port);
-    server.start();
+    server.start([](unsigned short port) {
+      LOG(info, "Server is listening on port {}", port);
+    });
   });
 
   serverThread.join();