--- a/rep/SessionManager.java	Mon Oct 25 11:23:21 2010 +0900
+++ b/rep/SessionManager.java	Fri Dec 17 16:18:26 2010 +0900
@@ -314,6 +314,8 @@
 	
 		// Session Manager Command
 	
+		// join to a session in the Session Manager
+		// a command from an editor or forwarded by other Session Manager
 		case SMCMD_JOIN:
 		{
 			// first connection or forwarded command
@@ -334,6 +336,7 @@
 	
 		break;
 	
+		// Acknowledge to the session put command
 		case SMCMD_PUT_ACK:
 			if (forwarder.isDirect()) {
 				// send put_ack to the editor now.
@@ -343,11 +346,15 @@
 				command.setSID(command.sid);
 				forwarder.send(command);
 			}
+			
+		//  Acknowledge to the session join command
 		case SMCMD_JOIN_ACK:
 			registEditor(forwarder,command);
 			manager.updateGUI(this);
 			break;
 	
+		//  Put a session to the session manager
+		//  Command from an editor or forwarded by a session manager 
 		case SMCMD_PUT:
 		{
 			// first connection or forwarded command
@@ -412,6 +419,8 @@
 		}
 			break;
 			
+		// Session Manager joins to other Session Manager
+		//    Command from Session Manager
 		case SMCMD_SM_JOIN:
 		{
 			// SM_JOIN中にSMCMD_SM_JOINが来たら、これはループなので、
@@ -437,10 +446,12 @@
 		case SMCMD_SYNC_ACK:
 			break;
 			
+		// get join ack ,  pass this to our children
 		case SMCMD_SM_JOIN_ACK:				
 			send_sm_join_ack(command.eid, command.sid, command);
 			break;
 	
+		// session state is changed, rewrite routing table
 		case SMCMD_UPDATE:
 			sendUpdate(command.sid);
 			break;

--- a/test/sematest/TestEditor.java	Mon Oct 25 11:23:21 2010 +0900
+++ b/test/sematest/TestEditor.java	Fri Dec 17 16:18:26 2010 +0900
@@ -301,6 +301,8 @@
 			inputLock = false;
 			ns.writeLog("AfterMerge "+text);
 			break;
+			// master editor changes QUIT_2 to QUIT_2_ACK
+			// Session manager should do this
 		case SMCMD_QUIT_2 :
 			if (cmd.eid!=eid) {
 				forwardCommand(cmd);