GUAC-1100: Add getActiveConnections() function to Connectable.

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/Connectable.java

@@ -51,4 +51,13 @@ public interface Connectable {
     public GuacamoleSocket connect(GuacamoleClientInformation info)
             throws GuacamoleException;
 
+    /**
+     * Returns the number of active connections associated with this object.
+     * Implementations may simply return 0 if this value is not tracked.
+     *
+     * @return
+     *     The number of active connections associated with this object.
+     */
+    public int getActiveConnections();
+    
 }

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/simple/SimpleConnection.java

@@ -78,6 +78,11 @@ public class SimpleConnection extends AbstractConnection {
 
     }
 
+    @Override
+    public int getActiveConnections() {
+        return 0;
+    }
+
     @Override
     public GuacamoleSocket connect(GuacamoleClientInformation info)
             throws GuacamoleException {

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/simple/SimpleConnectionGroup.java

@@ -86,6 +86,11 @@ public class SimpleConnectionGroup extends AbstractConnectionGroup {
 
     }
 
+    @Override
+    public int getActiveConnections() {
+        return 0;
+    }
+
     @Override
     public Set<String> getConnectionIdentifiers() {
         return connectionIdentifiers;