Fix filter handling (fix traccar#3958)

sunhoww · Jul 1, 2018 · b2a9557 · b2a9557
1 parent e849d3a
commit b2a9557
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/org/traccar/BaseDataHandler.java b/src/org/traccar/BaseDataHandler.java
@@ -24,7 +24,10 @@ public abstract class BaseDataHandler extends ChannelInboundHandlerAdapter {
     @Override
     public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
         if (msg instanceof Position) {
-            ctx.fireChannelRead(handlePosition((Position) msg));
+            Position position = handlePosition((Position) msg);
+            if (position != null) {
+                ctx.fireChannelRead(position);
+            }
         } else {
             super.channelRead(ctx, msg);
         }