feat: use WSL in Windows for execution of OMNeT++ federate

fed/mosaic-application/src/main/java/org/eclipse/mosaic/fed/application/ambassador/ApplicationAmbassador.java

@@ -116,7 +116,7 @@ public ApplicationAmbassador(AmbassadorParameter ambassadorParameter) {
         try {
             SimulationKernel.SimulationKernel.setConfigurationPath(ambassadorParameter.configuration.getParentFile());
             // try to read the configuration from the configuration file
-            ambassadorConfig = new ObjectInstantiation<>(CApplicationAmbassador.class).readFile(ambassadorParameter.configuration);
+            ambassadorConfig = new ObjectInstantiation<>(CApplicationAmbassador.class, log).readFile(ambassadorParameter.configuration);
 
             Validate.isTrue(ambassadorConfig.eventSchedulerThreads > 0,
                     "Number of eventSchedulerThreads must be greater than zero."

fed/mosaic-ns3/src/main/java/org/eclipse/mosaic/fed/ns3/ambassador/Ns3Ambassador.java

@@ -29,6 +29,8 @@
 import org.eclipse.mosaic.rti.api.parameters.AmbassadorParameter;
 import org.eclipse.mosaic.rti.config.CLocalHost.OperatingSystem;
 
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import javax.annotation.Nonnull;
 
 /**
@@ -48,6 +50,9 @@ public Ns3Ambassador(AmbassadorParameter ambassadorParameter) {
     @Nonnull
     @Override
     public FederateExecutor createFederateExecutor(String host, int port, OperatingSystem os) {
+        if (!Files.exists(Paths.get(this.ambassadorParameter.configuration.getParent(), "ns3_federate_config.xml"))) {
+            throw new IllegalArgumentException("ns3_federate_config.xml missing");
+        }
         switch (os) {
             case LINUX:
                 return new ExecutableFederateExecutor(this.descriptor, "./run.sh", Integer.toString(port));

fed/mosaic-omnetpp/src/main/java/org/eclipse/mosaic/fed/omnetpp/ambassador/OmnetppAmbassador.java

@@ -19,12 +19,13 @@
 import org.eclipse.mosaic.rti.api.FederateExecutor;
 import org.eclipse.mosaic.rti.api.federatestarter.DockerFederateExecutor;
 import org.eclipse.mosaic.rti.api.federatestarter.ExecutableFederateExecutor;
-import org.eclipse.mosaic.rti.api.federatestarter.NopFederateExecutor;
 import org.eclipse.mosaic.rti.api.parameters.AmbassadorParameter;
 import org.eclipse.mosaic.rti.config.CLocalHost.OperatingSystem;
 
 import org.apache.commons.lang3.ObjectUtils;
 
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import javax.annotation.Nonnull;
 
 /**
@@ -44,11 +45,14 @@ public OmnetppAmbassador(AmbassadorParameter ambassadorParameter) {
     @Nonnull
     @Override
     public FederateExecutor createFederateExecutor(String host, int port, OperatingSystem os) {
+        String omnetppConfigFileName = ObjectUtils.defaultIfNull(config.federateConfigurationFile, "omnetpp.ini"); // default // this one is required
+        if (!Files.exists(Paths.get(this.ambassadorParameter.configuration.getParent(), omnetppConfigFileName))) {
+            throw new IllegalArgumentException(omnetppConfigFileName + " missing");
+        }
+        String omnetppConfigFilePath = "omnetpp-federate/simulations/" + omnetppConfigFileName;
+        String inetSourceDirectories = "inet:omnetpp-federate/src";
         switch (os) {
             case LINUX:
-                String omnetppConfigFileName = ObjectUtils.defaultIfNull(config.federateConfigurationFile, "omnetpp.ini");
-                String omnetppConfigFilePath = "omnetpp-federate/simulations/" + omnetppConfigFileName;
-                String inetSourceDirectories = "inet:omnetpp-federate/src";
                 return new ExecutableFederateExecutor(this.descriptor, "omnetpp-federate/omnetpp-federate",
                         "-u", "Cmdenv",
                         "-f", omnetppConfigFilePath,
@@ -57,6 +61,13 @@ public FederateExecutor createFederateExecutor(String host, int port, OperatingS
                         "--mosaiceventscheduler-port=" + port
                 );
             case WINDOWS:
+                return new ExecutableFederateExecutor(this.descriptor, "wsl.exe", "omnetpp-federate/omnetpp-federate",
+                        "-u", "Cmdenv",
+                        "-f", omnetppConfigFilePath,
+                        "-n", inetSourceDirectories,
+                        "--mosaiceventscheduler-host=" + host,
+                        "--mosaiceventscheduler-port=" + port
+                );
             case UNKNOWN:
             default:
                 log.error("Operating system not supported by omnetpp");

fed/mosaic-sns/src/main/java/org/eclipse/mosaic/fed/sns/ambassador/SnsAmbassador.java

@@ -94,7 +94,7 @@ public void initialize(final long startTime, final long endTime) throws Internal
         }
 
         try {
-            CSns configuration = new ObjectInstantiation<>(CSns.class).readFile(ambassadorParameter.configuration);
+            CSns configuration = new ObjectInstantiation<>(CSns.class, log).readFile(ambassadorParameter.configuration);
             if (configuration.singlehopDelay instanceof GammaSpeedDelay) {
                 log.info("Detected GammaSpeedDelay for. The SNS is currently ignoring speed of entities in its evaluation of delay values");
             }

lib/mosaic-network/src/main/java/org/eclipse/mosaic/lib/coupling/AbstractNetworkAmbassador.java

@@ -166,9 +166,9 @@ protected AbstractNetworkAmbassador(AmbassadorParameter ambassadorParameter, Str
         this.removedNodes = new ArrayList<>();
 
         try {
-            config = new ObjectInstantiation<>(CAbstractNetworkAmbassador.class).readFile(ambassadorParameter.configuration);
+            config = new ObjectInstantiation<>(CAbstractNetworkAmbassador.class, log).readFile(ambassadorParameter.configuration);
         } catch (InstantiationException | NullPointerException e) {
-            log.warn("Could not read ambassador configuration in '{}'. Using default one instead.", ambassadorParameter.configuration);
+            log.warn("Problem when instantiating ambassador configuration from '{}'. Ignore file and try again with default config.", ambassadorParameter.configuration);
             config = new CAbstractNetworkAmbassador();
         }
     }