Implemented server to manage a list of available servers on the internet.

- Implemented a server manager that keeps track of servers & room codes, and removes old servers
- Implemented queries to find a server with a specific room code
- Implemented protocol to register servers

#story[1281]

src/main/java/seng302/gameServer/ServerAdvertiser.java

@@ -1,5 +1,9 @@
 package seng302.gameServer;
 
+import com.sun.org.apache.xpath.internal.operations.Bool;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import javax.jmdns.JmDNS;
 import javax.jmdns.ServiceInfo;
 import java.io.IOException;
@@ -27,7 +31,7 @@ public class ServerAdvertiser {
      */
     private static String SERVICE = "_partyatsea";
     private static String PROTOCOL = "_tcp";
-    public static String SERVICE_TYPE = SERVICE + "." + PROTOCOL + ".local.";
+    public static String SERVICE_TYPE = SERVICE + "." + PROTOCOL + ".homekit.bonjour.michaelrausch.nz.";
 
     private static ServerAdvertiser instance = null;
     private static JmDNS jmdnsInstance = null;

src/main/java/seng302/gameServer/ServerDescription.java

@@ -7,6 +7,10 @@ public class ServerDescription {
     private String serverName;
     private String mapName;
     private Integer numPlayers;
+    private Long lastUpdated;
+    private Long lastRefreshed;
+
+    private static Long EXPIRY_INTERVAL = 5000L;
 
     public ServerDescription(String serverName, String mapName, Integer numPlayers, Integer capacity, String address, Integer portNum){
         this.serverName = serverName;
@@ -15,6 +19,7 @@ public class ServerDescription {
         this.address = address;
         this.portNum = portNum;
         this.capacity = capacity;
+        lastUpdated = System.currentTimeMillis();
     }
 
 
@@ -80,4 +85,20 @@ public class ServerDescription {
         return this.getName().hashCode() + this.getAddress().hashCode() +
                 this.portNumber().hashCode() + this.getMapName().hashCode();
     }
+
+    public Boolean hasExpired(){
+        return System.currentTimeMillis() - lastUpdated > EXPIRY_INTERVAL;
+    }
+
+    public Boolean serverShouldBeRemoved() {
+        if (lastRefreshed == null) return false;
+
+        System.out.println("SBR" + (System.currentTimeMillis() - lastRefreshed > EXPIRY_INTERVAL));
+        return System.currentTimeMillis() - lastRefreshed > EXPIRY_INTERVAL;
+    }
+
+    public void hasBeenRefreshed(){
+        System.out.println("Was refreshed");
+        lastRefreshed = System.currentTimeMillis();
+    }
 }

src/main/java/seng302/gameServer/messages/MessageType.java

@@ -21,7 +21,10 @@ public enum MessageType {
     REGISTRATION_REQUEST(101),
     REGISTRATION_RESPONSE(102),
     CUSTOMIZATION_REQUEST(103),
-    CUSTOMIZATION_RESPONSE(104);
+    CUSTOMIZATION_RESPONSE(104),
+    REPO_REGISTRATION_REQUEST(201),
+    ROOM_CODE_REQUEST(202),
+    LOBBY_REQUEST(203);
 
 
     private int code;

src/main/java/seng302/gameServer/messages/RoomCodeRequest.java

@@ -0,0 +1,24 @@
+package seng302.gameServer.messages;
+
+public class RoomCodeRequest extends Message{
+    private int size = 0;
+
+    @Override
+    public int getSize() {
+        return size;
+    }
+
+    public RoomCodeRequest(String roomCode){
+        size = roomCode.length() + 6;
+
+        setHeader(new Header(MessageType.ROOM_CODE_REQUEST, 0x01, (short)getSize()));
+        allocateBuffer();
+        writeHeaderToBuffer();
+
+        putInt(roomCode.length(), 6);
+        putBytes(roomCode.getBytes());
+
+        writeCRC();
+        rewind();
+    }
+}

src/main/java/seng302/gameServer/messages/ServerRegistrationMessage.java

@@ -0,0 +1,40 @@
+package seng302.gameServer.messages;
+
+public class ServerRegistrationMessage extends Message {
+    private int size;
+    @Override
+    public int getSize() {
+        return size;
+    }
+
+    public ServerRegistrationMessage(String serverName, String mapName, String address, int port, int players, int capacity, String roomCode){
+        size = serverName.getBytes().length + mapName.length() + address.length() + roomCode.length() + 36;
+
+        setHeader(new Header(MessageType.REPO_REGISTRATION_REQUEST, 0x01, (short) getSize()));
+        allocateBuffer();
+        writeHeaderToBuffer();
+
+        int nameLength = serverName.length();
+        int mapNameLength = mapName.length();
+        int addressLength = address.length();
+        int roomCodeLength = roomCode.length();
+
+        // Put fields here
+        putInt(nameLength, 6);
+        putInt(mapNameLength, 6);
+        putInt(addressLength, 6);
+        putInt(roomCodeLength, 6);
+
+        putInt(port, 4);
+        putInt(players, 4);
+        putInt(capacity, 4);
+
+        putBytes(serverName.getBytes());
+        putBytes(mapName.getBytes());
+        putBytes(address.getBytes());
+        putBytes(roomCode.getBytes());
+
+        writeCRC();
+        rewind();
+    }
+}