Changes between Version 21 and Version 22 of Documentation/Tutorial/PingPong

Timestamp:

Jan 22, 2009, 10:06:17 PM (15 years ago)

Author:

huebsch

Comment:

--

Documentation/Tutorial/PingPong

@@ -154 +154 @@
 }}}
 
-Node leaves in our case only lead to deletion of links we had stored, for we don't need them anymore (line 102).
+Node leaves in our case only lead to deletion of links we had stored before, for we don't need them anymore (line 102).
+
+So far, the node is up and running, created or joined a SpoVNet instance. The initiaor started a timer as soon as another node had joined. Now we see what happens when the timer is triggered.
 
 
+{{{
+110 void PingPong::eventFunction(){
+111
+112     logging_info( "pinging our remote nodes" );
+113
+114     RemoteNodes::iterator i = remoteNodes.begin();
+115     RemoteNodes::iterator iend = remoteNodes.end();
+116
+117     pingid++;
+118
+119     for( ; i != iend; i++ ){
+120             logging_info( "     -> pinging " << i->first );
+121
+122             PingPongMessage pingmsg( pingid );
+123             overlay->sendMessage( &pingmsg, i->second );
+124     }
+125 }
+}}}
+
+Everytime the timer 'fires', ''eventFunction'' is called on a node (lines 110-125). In this example, the initiator sends a message to every node that has joined up to this point in time. To accomplish this, it iterates through all established links (line 119), builts a message for every link and finally sends the message using the Base Overlay in ''Ariba''.
+