Changeset 347 in tmcsimulator for trunk/src/tmcsim/cadsimulator/Coordinator.java

Timestamp:

03/25/2019 07:35:45 PM (7 years ago)

Author:

jdalbey

Message:

Coordinator.java: Enhance tick() method to write current time to a json file, for use by web clients. Also update build.xml so Sim Mgr jar includes needed time selector library.

File:

• trunk/src/tmcsim/cadsimulator/Coordinator.java (modified) (4 diffs)

trunk/src/tmcsim/cadsimulator/Coordinator.java

@@ -2 +2 @@
 
 import java.io.File;
+import java.io.FileWriter;
+import java.io.PrintWriter;
 import java.rmi.RemoteException;
 import java.rmi.server.UnicastRemoteObject;
@@ -68 +70 @@
 import tmcsim.interfaces.CoordinatorInterface;
 import tmcsim.interfaces.SimulationManagerInterface;
+import tmcsim.simulationmanager.SimulationManagerView;
 
 /**
@@ -90 +93 @@
 {
     /**
+     * The name of the file where the simulation clock time is written
+     */
+    public static final String kSimClockFilename = "webapps/sim_clock.json";
+    /**
      * Error logger.
      */
@@ -700 +707 @@
 
                     CADServer.theIncidentMgr.tick(currentSimTime);
-                }
+                    /* Write the currentSimTime to a file. 
+                       This will be read asynchronously by web clients, e.g.,
+                       the electronic instructor notebook, that want to display
+                       the current simulation time.
+                    */
+                    PrintWriter writer = null;
+                    try {
+                        writer = new PrintWriter(new FileWriter(kSimClockFilename));
+                        // Format output as json
+                        String lineout =  "{\"clock\":\"" 
+                                + SimulationManagerView.longToTime(currentSimTime) + "\"}";
+                        writer.println(lineout);
+                        writer.close();
+                        } catch (Exception ex) 
+                        {
+                        coorLogger.logp(Level.SEVERE, "Coordinator", "tick:run",
+                                "Failed to write current sim time to file.", ex);
+                        } 
+                        }
             };