build the dependency graph only after establishing all connections

Author: cmnrd

include/reactor-cpp/environment.hh

@@ -88,7 +88,7 @@ public:
 
   template <class T> void draw_connection(Port<T>* source, Port<T>* sink, ConnectionProperties properties) {
     if (top_environment_ == nullptr || top_environment_ == this) {
-      log::Debug() << "drawing connection: " << source << " --> " << sink;
+      log::Debug() << "drawing connection: " << source->fqn() << " --> " << sink->fqn();
       graph_.add_edge(source, sink, properties);
     } else {
       top_environment_->draw_connection(source, sink, properties);

lib/environment.cc

@@ -85,11 +85,17 @@ void Environment::assemble() { // NOLINT
     recursive_assemble(reactor);
   }
 
-  log::Debug() << "start optimization on port graph";
-  this->optimize();
+  // this assembles all the contained environments aka enclaves
+  for (auto* env : contained_environments_) {
+    env->assemble();
+  }
 
-  log::Debug() << "instantiating port graph declaration";
+  // If this is the top level environment, then instantiate all connections.
   if (top_environment_ == nullptr || top_environment_ == this) {
+    log::Debug() << "start optimization on port graph";
+    this->optimize();
+
+    log::Debug() << "instantiating port graph declaration";
     log::Debug() << "graph: ";
     log::Debug() << optimized_graph_;
 
@@ -136,18 +142,6 @@ void Environment::assemble() { // NOLINT
       }
     }
   }
-
-  log::Debug() << "Building the Dependency-Graph";
-  for (auto* reactor : top_level_reactors_) {
-    build_dependency_graph(reactor);
-  }
-
-  calculate_indexes();
-
-  // this assembles all the contained environments aka enclaves
-  for (auto* env : contained_environments_) {
-    env->assemble();
-  }
 }
 
 void Environment::build_dependency_graph(Reactor* reactor) { // NOLINT
@@ -326,6 +320,13 @@ auto Environment::startup() -> std::thread {
 auto Environment::startup(const TimePoint& start_time) -> std::thread {
   validate(this->phase() == Phase::Assembly, "startup() may only be called during assembly phase!");
 
+  log::Debug() << "Building the Dependency-Graph";
+  for (auto* reactor : top_level_reactors_) {
+    build_dependency_graph(reactor);
+  }
+
+  calculate_indexes();
+
   log_.debug() << "Starting the execution";
   phase_ = Phase::Startup;