reliable multicast: announce presence to group

1 files changed, 10 insertions, 0 deletions

diff --git a/src/main/java/derms/net/rmulticast/NullPayload.java b/src/main/java/derms/net/rmulticast/NullPayload.java
new file mode 100644
index 0000000..1eee5d6
--- /dev/null
+++ b/src/main/java/derms/net/rmulticast/NullPayload.java
@@ -0,0 +1,10 @@
+package derms.net.rmulticast;
+
+import java.io.Serializable;
+
+class NullPayload implements Serializable, Hashable {
+    @Override
+    public int hash() {
+        return -1;
+    }
+}