feat: extend Main

grb-use/pom.xml

@@ -19,6 +19,13 @@
         </license>
     </licenses>
 
+    <repositories>
+        <repository>
+            <id>public.onebusaway.org</id>
+            <url>http://nexus.onebusaway.org/content/groups/public/</url>
+        </repository>
+    </repositories>
+
     <scm>
         <url>https://github.com/Software-Ingenieur-Begerad/sandbox-java</url>
     </scm>
@@ -28,16 +35,24 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.onebusaway</groupId>
+            <artifactId>onebusaway-gtfs-realtime-exporter</artifactId>
+            <version>1.1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mobilitydata</groupId>
+            <artifactId>gtfs-realtime-bindings</artifactId>
+            <version>0.0.8</version>
+        </dependency>
+    </dependencies>
     <build>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.10.1</version>
-                <configuration>
-                    <!-- Target Java versions -->
-                    <release>11</release>
-                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>

grb-use/src/main/java/de/swingbe/grb_use/Main.java

@@ -1,9 +1,73 @@
 package de.swingbe.grb_use;
 
+import org.onebusway.gtfs_realtime.exporter.GtfsRealtimeLibrary;
+import org.onebusway.gtfs_realtime.exporter.GtfsRealtimeMutableProvider;
+
+import com.google.transit.realtime.GtfsRealtime.FeedEntity;
+import com.google.transit.realtime.GtfsRealtime.FeedMessage;
+import com.google.transit.realtime.GtfsRealtime.Position;
+import com.google.transit.realtime.GtfsRealtime.VehiclePosition;
+import com.google.transit.realtime.GtfsRealtime.TripDescriptor;
+import com.google.transit.realtime.GtfsRealtime.VehicleDescriptor;
+
 public class Main {
 
+    private static GtfsRealtimeMutableProvider gtfsRealtimeMutableProvider;
+
     public static void main(String[] args) {
-        System.out.println("Hello world!");
+        System.out.println("main() started...");
+        //GtfsRealtime.FeedMessage msg;
+        FeedMessage.Builder vehiclePositions = GtfsRealtimeLibrary.createFeedMessageBuilder();
+
+        /**
+         * We construct a TripDescriptor and VehicleDescriptor, which will be used
+         * in both trip updates and vehicle positions to identify the trip and
+         * vehicle. Ideally, we would have a trip id to use for the trip
+         * descriptor, but the SEPTA api doesn't include it, so we settle for a
+         * route id instead.
+         */
+        TripDescriptor.Builder tripDescriptor = TripDescriptor.newBuilder();
+        tripDescriptor.setRouteId("tripDescriptor:RouteId");
+
+        VehicleDescriptor.Builder vehicleDescriptor = VehicleDescriptor.newBuilder();
+        vehicleDescriptor.setId("vehicleDescriptor:Id");
+
+        /**
+         * To construct our VehiclePosition, we create a position for the vehicle.
+         * We add the position to a VehiclePosition builder, along with the trip
+         * and vehicle descriptors.
+         */
+
+        /**
+         * Brunswick
+         */
+        double lat = 52.268875;
+        double lon = 10.526770;
+
+        Position.Builder position = Position.newBuilder();
+        position.setLatitude((float) lat);
+        position.setLongitude((float) lon);
+
+        VehiclePosition.Builder vehiclePosition = VehiclePosition.newBuilder();
+        vehiclePosition.setPosition(position);
+        vehiclePosition.setTrip(tripDescriptor);
+        vehiclePosition.setVehicle(vehicleDescriptor);
+
+        /**
+         * Create a new feed entity to wrap the vehicle position and add it to the
+         * GTFS-realtime vehicle positions feed.
+         */
+        FeedEntity.Builder vehiclePositionEntity = FeedEntity.newBuilder();
+        vehiclePositionEntity.setId("vehiclePositionEntity:Id");
+        vehiclePositionEntity.setVehicle(vehiclePosition);
+        vehiclePositions.addEntity(vehiclePositionEntity);
+
+        /**
+         * Build out the final GTFS-realtime feed messagse and save them.
+         */
+        gtfsRealtimeMutableProvider.setVehiclePositions(vehiclePositions.build());
+
+        System.out.println("main() done.");
         return;
     }
 }