First release

- Added build script and AMPL license file
- Fixed merge errors for the makefile
- Extended the makefile header
- Added initial AMQ message topics
- Tested remote build
- Removed AMPL license file
- Validated build script
- Accepting the metric definition message from the EMS
- Execution control status messages + solver type command line option
- Executing solver component
- Added instructions on use to the Solver Component source file
- Explicit close of subscriptions in destrcutors if network active.
- Correct handling of metric list messages and subscriptions
- Adding correct message and connection properties

Change-Id: If02caff12aacf8a2181c96eb6dca4a19dc23c118

.vscode/c_cpp_properties.json

@@ -3,19 +3,15 @@
         {
             "name": "Linux",
             "includePath": [
-                "/usr/lib/gcc/x86_64-redhat-linux/13/../../../../include/c++/13",
                 "/home/GHo/Documents/Code/CxxOpts/include",
                 "/home/GHo/Documents/Code/Theron++",
-                "/home/GHo/Documents/Code/Theron++/Utility",
-                "/home/GHo/Documents/Code/Theron++/Communication",
-                "/home/GHo/Documents/Code/Theron++/Communication/AMQ",
                 "/opt/AMPL/amplapi/include/ampl",
                 "${workspaceFolder}/**",
-                "/home/GHo/Documents/Code/Theron++"
+                "/usr/lib/gcc/x86_64-redhat-linux/13/../../../../include/c++/13"
             ],
             "defines": [],
             "cStandard": "c23",
-            "intelliSenseMode": "linux-gcc-x64",
+            "intelliSenseMode": "${default}",
             "compilerPath": "/usr/bin/g++",
             "compilerArgs": [
                 "-std=c++23",
@@ -28,12 +24,9 @@
             "configurationProvider": "ms-vscode.makefile-tools",
             "browse": {
                 "path": [
-                    "/usr/lib/gcc/x86_64-redhat-linux/13/../../../../include/c++/13",
                     "/home/GHo/Documents/Code/Theron++",
                     "/home/GHo/Documents/Code/CxxOpts/include",
-                    "/home/GHo/Documents/Code/Theron++/Utility",
-                    "/home/GHo/Documents/Code/Theron++/Communication",
-                    "/home/GHo/Documents/Code/Theron++/Examples"
+                    "/usr/lib/gcc/x86_64-redhat-linux/13/../../../../include/c++/13"
                 ],
                 "limitSymbolsToIncludedHeaders": false
             }

AMPLTest/.gitignore

@@ -0,0 +1 @@
+*.ampl

ExecutionControl.cpp

@@ -68,7 +68,7 @@ void ExecutionControl::StopMessageHandler( const StopMessage & Command,
 }
 
 // -----------------------------------------------------------------------------
-// Constructor
+// Constructor & destructor
 // -----------------------------------------------------------------------------
 // 
 // The constructor registers the stop message handler and sets up a publisher 
@@ -91,4 +91,16 @@ ExecutionControl::ExecutionControl( const std::string & TheActorName )
 
 }
 
+// The destructor simply closes the publisher if the network is still active
+// when the actor closes.
+
+ExecutionControl::~ExecutionControl( void )
+{
+  if( HasNetwork() )
+    Send( Theron::AMQ::NetworkLayer::TopicSubscription(
+      Theron::AMQ::NetworkLayer::TopicSubscription::Action::ClosePublisher,
+      std::string( StatusTopic )
+    ), GetSessionLayerAddress() );
+}
+
 } // namespace NebulOuS

ExecutionControl.hpp

@@ -167,7 +167,7 @@ public:
   ExecutionControl( const std::string & TheActorName );
 
   ExecutionControl() = delete;
-  virtual ~ExecutionControl() = default;
+  virtual ~ExecutionControl();
 };
         
 }      // namespace NebulOuS 

MetricUpdater.cpp

@@ -18,6 +18,7 @@ License: MPL2.0 (https://www.mozilla.org/en-US/MPL/2.0/)
 #include <ranges>                                  // Container ranges
 #include <algorithm>                               // Algorithms
 
+#include "Utility/ConsolePrint.hpp"                // For logging
 #include "Communication/AMQ/AMQEndpoint.hpp"       // For Topic subscriptions
 
 #include "MetricUpdater.hpp"
@@ -41,36 +42,34 @@ namespace NebulOuS
 void MetricUpdater::AddMetricSubscription( const MetricTopic & TheMetrics,
                                            const Address OptimiserController )
 {
-    if( TheMetrics.is_object() && 
-        TheMetrics.at( NebulOuS::MetricList ).is_object() )
-      {
-        JSON MetricList = TheMetrics.at( NebulOuS::MetricList );
-
-        for( const JSON MetricDefinition : MetricList.items() )      
-        {
-          auto [ MetricRecord, NewMetric ] = MetricValues.try_emplace( 
-                MetricDefinition.at( NebulOuS::MetricName ), JSON() );
-
-          if( NewMetric )
-            Send( Theron::AMQ::NetworkLayer::TopicSubscription( 
-                  Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
-                  MetricRecord->first ), 
-                  Theron::AMQ::Network::GetAddress( Theron::Network::Layer::Session) );
-        }
-      }
-    else
+  if( TheMetrics.is_object() && 
+      TheMetrics.at( NebulOuS::MetricList ).is_array() )
+  {
+    for (auto & MetricRecord : TheMetrics.at( NebulOuS::MetricList ) )
     {
-      std::source_location Location = std::source_location::current();
-      std::ostringstream ErrorMessage;
+      auto [ MetricRecordPointer, NewMetric ] = MetricValues.try_emplace( 
+             MetricRecord.at( NebulOuS::MetricName ), JSON() );
 
-      ErrorMessage << "[" << Location.file_name() << " at line " << Location.line() 
-                  << "in function " << Location.function_name() <<"] " 
-                  << "The message to define a new metric subscription is given as "
-                  << std::endl << TheMetrics.dump(2) << std::endl
-                  << "this is not as expected!";
-
-      throw std::invalid_argument( ErrorMessage.str() );
+      if( NewMetric )
+        Send( Theron::AMQ::NetworkLayer::TopicSubscription( 
+              Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
+              std::string( MetricValueRootString ) + MetricRecordPointer->first ), 
+              Theron::AMQ::Network::GetAddress( Theron::Network::Layer::Session) );
     }
+  }
+  else
+  {
+    std::source_location Location = std::source_location::current();
+    std::ostringstream ErrorMessage;
+
+    ErrorMessage << "[" << Location.file_name() << " at line " << Location.line() 
+                << " in function " << Location.function_name() <<"] " 
+                << "The message to define a new metric subscription is given as "
+                << std::endl << TheMetrics.dump(2) << std::endl
+                << "this is not as expected!";
+
+    throw std::invalid_argument( ErrorMessage.str() );
+  }
 }
 
 // The metric update value is received whenever any of subscribed forecasters
@@ -102,10 +101,17 @@ void MetricUpdater::AddMetricSubscription( const MetricTopic & TheMetrics,
 void MetricUpdater::UpdateMetricValue( 
      const MetricValueUpdate & TheMetricValue, const Address TheMetricTopic)
 {
+  Theron::ConsoleOutput Output;
+
+  Output << "Metric topic: " << TheMetricTopic.AsString() << std::endl;
+
   Theron::AMQ::TopicName TheTopic 
           = TheMetricTopic.AsString().erase( 0, 
                                       NebulOuS::MetricValueRootString.size() );
 
+  Output << "The metric: " << TheTopic << " has new value "
+         << TheMetricValue[ NebulOuS::ValueLabel ] << std::endl;
+        
   if( MetricValues.contains( TheTopic ) )
   {
     MetricValues.at( TheTopic ) = TheMetricValue[ NebulOuS::ValueLabel ];

MetricUpdater.hpp

@@ -88,7 +88,7 @@ constexpr std::string_view TimePoint  = "predictionTime";
 // defined next.
 
 constexpr std::string_view MetricSubscriptions 
-          = "eu.nebulouscloud.monitoring.metric_lists";
+          = "eu.nebulouscloud.monitoring.metric_list";
 
 // The JSON message attribute for the list of metrics is another JSON object
 // stored under the following key, see the Event type III defined in 
@@ -211,6 +211,10 @@ private:
     : JSONTopicMessage( Other )
     {}
 
+    // MetricTopic( const JSONTopicMessage & Other )
+    // : JSONTopicMessage( Other )
+    // {}
+
     virtual ~MetricTopic() = default;
   };
 

SolverComponent.cpp

@@ -54,6 +54,17 @@ be extended with the AMPL execution file path, e.g.,
 
   export PATH=$PATH:/opt/AMPL
 
+The parameters to the application are used as described above, and typically the
+endpoint is set to some unique identifier of the application for which this 
+solver is used, e.g.,
+
+  ./SolverComponent --AMPLDir /opt/AMPL \
+  --Endpoint f81ee-b42a8-a13d56-e28ec9-2f5578 --ModelDir AMPLTest/
+
+Debugging after a coredump
+
+  coredumpctl debug SolverComponent
+
 Author and Copyright: Geir Horn, University of Oslo
 Contact: Geir.Horn@mn.uio.no
 License: MPL2.0 (https://www.mozilla.org/en-US/MPL/2.0/)
@@ -66,6 +77,7 @@ License: MPL2.0 (https://www.mozilla.org/en-US/MPL/2.0/)
 #include <sstream>          // To format error messages
 #include <stdexcept>        // standard exceptions
 #include <filesystem>       // Access to the file system
+#include <map>              // For extended AMQ properties
 
 // Theron++ headers
 
@@ -78,7 +90,9 @@ License: MPL2.0 (https://www.mozilla.org/en-US/MPL/2.0/)
 
 // AMQ protocol related headers
 
+#include "proton/symbol.hpp"                    // AMQ symbols
 #include "proton/connection_options.hpp"        // Options for the Broker
+#include "proton/message.hpp"                   // AMQ messages definitions
 #include "Communication/AMQ/AMQMessage.hpp"     // The AMQP messages
 #include "Communication/AMQ/AMQEndpoint.hpp"    // The AMP endpoint
 #include "Communication/AMQ/AMQjson.hpp"        // Transparent JSON-AMQP
@@ -127,6 +141,8 @@ int main( int NumberOfCLIOptions, char ** CLIOptionStrings )
         cxxopts::value<unsigned int>()->default_value("5672") )
     ("S,Solver", "Solver to use, devault Couenne",
         cxxopts::value<std::string>()->default_value("couenne") )
+    ("T,Tenant", "Tenant identifier for messages",
+        cxxopts::value<std::string>()->default_value("TheTenant"))
     ("U,User", "The user name used for the AMQ Broker connection", 
         cxxopts::value<std::string>()->default_value("admin") )
     ("Pw,Password", "The password for the AMQ Broker connection", 
@@ -180,29 +196,51 @@ int main( int NumberOfCLIOptions, char ** CLIOptionStrings )
   // The AMQ communication is managed by the standard communication actors of 
   // the Theron++ Actor framewokr. Thus, it is just a matter of starting the 
   // endpoint actors with the given command line parameters.
-  //
-  // The network endpoint takes the endpoint name as the first argument, then 
-  // the URL for the broker and the port number. The user name and the password
-  // are defined in the AMQ Qpid Proton connection options, and the values are
-  // therefore set for the connection options.
+  
+  // There are certain properties defined for the NebulOuS communication 
+  // protocol where the endpoint name is taken as the application identifier
+  // and the tenant identifier and the protocol used. The same information 
+  // has to be given as different maps for the connection options and for
+  // the message properties.
+
+  std::map< proton::symbol, proton::value > NebulOuSProperties{
+    {"x-tenant-id", CLIValues["Tenant"].as< std::string >() },
+    {"x-application-id", CLIValues["Endpoint"].as< std::string >()},
+    {"x-protocol", "AMQP"}
+  };
+
+  proton::message::property_map MessageProperties{
+    {"x-tenant-id", CLIValues["Tenant"].as< std::string >() },
+    {"x-application-id", CLIValues["Endpoint"].as< std::string >()},
+    {"x-protocol", "AMQP"}
+  };
+
+  // The user name and the password are defined in the AMQ Qpid Proton 
+  // connection options, and the values are therefore set for the connection 
+  // options.
 
   proton::connection_options AMQOptions;
 
   AMQOptions.user( CLIValues["User"].as< std::string >() );
   AMQOptions.password( CLIValues["Password"].as< std::string >() );
+  AMQOptions.properties( NebulOuSProperties );
 
-  // Then the network endpoint cna be constructed using the default names for
-  // the various network endpoint servers in order to pass the defined 
-  // connection options.
+  // The network endpoint takes the endpoint name as the first argument, then 
+  // the URL for the broker and the port number. Then the network endpoint can
+  // be constructed using the default names for the Session Layer and the 
+  // Presentation layer servers, but calling the endpoint for "Solver" to make
+  // it more visible at the AMQ broker listing of subscribers. The endpoint 
+  // will be a unique application identifier. The server names are followed
+  // by the defined connection options and the message options.
 
   Theron::AMQ::NetworkEndpoint AMQNetWork( 
     CLIValues["Endpoint"].as< std::string >(), 
     CLIValues["Broker"].as< std::string >(),
     CLIValues["Port"].as< unsigned int >(),
-    Theron::AMQ::Network::NetworkLayerLabel,
+    "Solver",
     Theron::AMQ::Network::SessionLayerLabel,
     Theron::AMQ::Network::PresentationLayerLabel,
-    AMQOptions
+    AMQOptions, MessageProperties
   );
 
   // --------------------------------------------------------------------------

SolverManager.hpp

@@ -97,11 +97,12 @@ class SolverManager
 {
   // There is a topic name used to publish solutions found by the solvers. This 
   // topic is given to the constructor and kept as a constant during the class
-  // execution.
+  // execution. The same goes for the topic on which application execution 
+  // contexts will arrive for processing.
 
 private:
 
-  const Theron::AMQ::TopicName SolutionReceiver;
+  const Theron::AMQ::TopicName SolutionReceiver, ContextTopic;
 
   // --------------------------------------------------------------------------
   // Solver management
@@ -259,6 +260,7 @@ public:
     NetworkingActor( Actor::GetAddress().AsString() ),
     ExecutionControl( Actor::GetAddress().AsString() ),
     SolutionReceiver( SolutionTopic ),
+    ContextTopic( ContextPublisherTopic ),
     SolverPool(), ActiveSolvers(), PassiveSolvers(),
     Contexts(), ContextExecutionQueue()
   {
@@ -322,6 +324,25 @@ public:
     }
   }
 
+  // The destructor closes all the open topics if the network is still open 
+  // when the destructor is invoked.
+
+  virtual ~SolverManager( void )
+  {
+    if( HasNetwork() )
+    {
+      Send( Theron::AMQ::NetworkLayer::TopicSubscription(
+        Theron::AMQ::NetworkLayer::TopicSubscription::Action::ClosePublisher,
+        SolutionReceiver
+      ), GetSessionLayerAddress() );
+
+      Send( Theron::AMQ::NetworkLayer::TopicSubscription(
+        Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
+        ContextTopic
+      ), GetSessionLayerAddress() );
+    }
+  }
+
 };
   
 } // namespace NebulOuS

makefile

@@ -132,7 +132,7 @@ SOLVER_OBJECTS = $(addprefix $(OBJECTS_DIR)/, $(SOLVER_SOURCE:.cpp=.o) )
 # component's objective file, they can be built by a general rule
 
 $(OBJECTS_DIR)/%.o : %.cpp
-	$(CXX) $(CXXFLAGS) -c $< -o $@ $(INCLUDE_DIRECTORIES)
+	$(CC) $(CXXFLAGS) -c $< -o $@ $(INCLUDE_DIRECTORIES)
 
 #------------------------------------------------------------------------------
 # Solver component
@@ -143,7 +143,7 @@ $(OBJECTS_DIR)/%.o : %.cpp
 # the object files or the solver actors.
 
 SolverComponent: $(SOLVER_OBJECTS) $(THERON)/Theron++.a
-	$(CXX) -o SolverComponent $(CXXFLAGS) $(SOLVER_OBJECTS) $(LDFLAGS)
+	$(CC) -o SolverComponent $(CXXFLAGS) $(SOLVER_OBJECTS) $(LDFLAGS)
 
 # There is also a standard target to clean the automatically generated build 
 # files