reliable multicast: announce presence to group

1 files changed, 10 insertions, 0 deletions

diff --git a/src/main/java/derms/net/rmulticast/AnnounceMessage.java b/src/main/java/derms/net/rmulticast/AnnounceMessage.java
new file mode 100644
index 0000000..bfe4b40
--- /dev/null
+++ b/src/main/java/derms/net/rmulticast/AnnounceMessage.java
@@ -0,0 +1,10 @@
+package derms.net.rmulticast;
+
+import java.net.InetAddress;
+
+/** A message whose only purpose is to announce the presence of the sender in the group. */
+class AnnounceMessage extends Message<NullPayload> {
+    AnnounceMessage(InetAddress laddr) {
+        super(new NullPayload(), laddr, new MessageID[0], new MessageID[0]);
+    }
+}