Document the DHT's knode module.

diff --git a/apt_dht_Khashmir/knode.py b/apt_dht_Khashmir/knode.py
index ea714e603a4ffdd7fa752bf2d807db1779ef1298..e7fb6b3720a750a5c77bfa224105b20002f5c4fc 100644 (file)
--- a/apt_dht_Khashmir/knode.py
+++ b/apt_dht_Khashmir/knode.py
@@ -1,12 +1,17 @@
 ## Copyright 2002-2004 Andrew Loewenstern, All Rights Reserved
 # see LICENSE.txt for license information
 
+"""Represents a khashmir node in the DHT."""
+
 from twisted.python import log
 
 from node import Node, NULL_ID
 
 class KNodeBase(Node):
+    """A basic node that can only be pinged and help find other nodes."""
+    
     def checkSender(self, dict):
+        """Check the sender's info to make sure it meets expectations."""
         try:
             senderid = dict['rsp']['id']
         except KeyError:
@@ -20,42 +25,53 @@ class KNodeBase(Node):
         return dict
 
     def errBack(self, err):
+        """Log an error that has occurred."""
         log.err(err)
         return err
         
     def ping(self, id):
+        """Ping the node."""
         df = self.conn.sendRequest('ping', {"id":id})
         df.addErrback(self.errBack)
         df.addCallback(self.checkSender)
         return df
     
     def join(self, id):
+        """Use the node to bootstrap into the system."""
         df = self.conn.sendRequest('join', {"id":id})
         df.addErrback(self.errBack)
         df.addCallback(self.checkSender)
         return df
     
     def findNode(self, id, target):
+        """Request the nearest nodes to the target that the node knows about."""
         df = self.conn.sendRequest('find_node', {"target" : target, "id": id})
         df.addErrback(self.errBack)
         df.addCallback(self.checkSender)
         return df
 
 class KNodeRead(KNodeBase):
+    """More advanced node that can also find and send values."""
+    
     def findValue(self, id, key):
+        """Request the nearest nodes to the key that the node knows about."""
         df =  self.conn.sendRequest('find_value', {"key" : key, "id" : id})
         df.addErrback(self.errBack)
         df.addCallback(self.checkSender)
         return df
 
     def getValue(self, id, key, num):
+        """Request the values that the node has for the key."""
         df = self.conn.sendRequest('get_value', {"key" : key, "num": num, "id" : id})
         df.addErrback(self.errBack)
         df.addCallback(self.checkSender)
         return df
 
 class KNodeWrite(KNodeRead):
+    """Most advanced node that can also store values."""
+    
     def storeValue(self, id, key, value, token):
+        """Store a value in the node."""
         df = self.conn.sendRequest('store_value', {"key" : key, "value" : value, "token" : token, "id": id})
         df.addErrback(self.errBack)
         df.addCallback(self.checkSender)