From: Brian Warner <warner@lothar.com>
Date: Fri, 1 Dec 2006 01:09:57 +0000 (-0700)
Subject: implement more Roster stuff: add_peer, lost_peer. Changed Client service registration... 
X-Git-Tag: tahoe_v0.1.0-0-UNSTABLE~530
X-Git-Url: https://git.rkrishnan.org/components/com_hotproperty/flags/about.html?a=commitdiff_plain;h=646f888bbd351b8c09069436019d2ed2b34fdf2c;p=tahoe-lafs%2Ftahoe-lafs.git

implement more Roster stuff: add_peer, lost_peer. Changed Client service registration scheme.
---

diff --git a/allmydata/client.py b/allmydata/client.py
index c60042a1..908a2e31 100644
--- a/allmydata/client.py
+++ b/allmydata/client.py
@@ -10,6 +10,7 @@ from twisted.internet.base import BlockingResolver
 reactor.installResolver(BlockingResolver())
 
 class Storage(service.MultiService, Referenceable):
+    name = "storage"
     pass
 
 class Client(service.MultiService, Referenceable):
@@ -28,27 +29,30 @@ class Client(service.MultiService, Referenceable):
             f.close()
         self.tub.setServiceParent(self)
         self.queen = None # self.queen is either None or a RemoteReference
-        self.urls = {}
+        self.all_peers = set()
+        self.connections = {}
+        s = Storage()
+        s.setServiceParent(self)
+
         if os.path.exists(self.AUTHKEYSFILE):
             from allmydata import manhole
             m = manhole.AuthorizedKeysManhole(8022, self.AUTHKEYSFILE)
             m.setServiceParent(self)
             log.msg("AuthorizedKeysManhole listening on 8022")
 
-    def _setup_services(self, local_ip):
+    def _setup_tub(self, local_ip):
         portnum = 0
         l = self.tub.listenOn("tcp:%d" % portnum)
         self.tub.setLocation("%s:%d" % (local_ip, l.getPortnum()))
-        s = Storage()
-        s.setServiceParent(self)
-        self.urls["storage"] = self.tub.registerReference(s, "storage")
+        self.my_pburl = self.tub.registerReference(self)
 
     def startService(self):
         # note: this class can only be started and stopped once.
         service.MultiService.startService(self)
         d = get_local_ip_for()
-        d.addCallback(self._setup_services)
+        d.addCallback(self._setup_tub)
         if self.queen_pburl:
+            # TODO: maybe this should wait for tub.setLocation ?
             self.connector = self.tub.connectTo(self.queen_pburl,
                                                 self._got_queen)
         else:
@@ -63,8 +67,37 @@ class Client(service.MultiService, Referenceable):
         log.msg("connected to queen")
         self.queen = queen
         queen.notifyOnDisconnect(self._lost_queen)
-        queen.callRemote("hello", nodeid=self.tub.tubID, self=self, urls=self.urls)
+        queen.callRemote("hello",
+                         nodeid=self.tub.tubID, node=self, pburl=self.my_pburl)
 
     def _lost_queen(self):
         log.msg("lost connection to queen")
         self.queen = None
+
+    def remote_get_service(self, name):
+        return self.getServiceNamed(name)
+
+    def remote_add_peers(self, new_peers):
+        for nodeid, pburl in new_peers:
+            if nodeid == self.tub.tubID:
+                continue
+            log.msg("adding peer %s" % nodeid)
+            if nodeid in self.all_peers:
+                log.msg("weird, I already had an entry for them")
+            self.all_peers.add(nodeid)
+            if nodeid not in self.connections:
+                d = self.tub.getReference(pburl)
+                def _got_reference(ref):
+                    if nodeid in self.all_peers:
+                        self.connections[nodeid] = ref
+                d.addCallback(_got_reference)
+
+    def remote_lost_peers(self, lost_peers):
+        for nodeid in lost_peers:
+            log.msg("lost peer %s" % nodeid)
+            if nodeid in self.all_peers:
+                del self.all_peers[nodeid]
+            else:
+                log.msg("weird, I didn't have an entry for them")
+            if nodeid in self.connections:
+                del self.connections[nodeid]
diff --git a/allmydata/queen.py b/allmydata/queen.py
index 1c7158a0..849425d5 100644
--- a/allmydata/queen.py
+++ b/allmydata/queen.py
@@ -1,5 +1,6 @@
 
 from foolscap import Tub, Referenceable
+from foolscap.eventual import eventually
 from twisted.application import service
 from twisted.python import log
 import os.path
@@ -8,16 +9,35 @@ from allmydata.util.iputil import get_local_ip_for
 class Roster(service.MultiService, Referenceable):
     def __init__(self):
         service.MultiService.__init__(self)
-        self.active_peers = {}
+        self.phonebook = {}
+        self.connections = {}
 
-    def remote_hello(self, nodeid, node, urls):
+    def remote_hello(self, nodeid, node, pburl):
         log.msg("contact from %s" % nodeid)
-        self.active_peers[nodeid] = urls
+        eventually(self._educate_the_new_peer, node)
+        eventually(self._announce_new_peer, nodeid, pburl)
+        self.phonebook[nodeid] = pburl
+        self.connections[nodeid] = node
         node.notifyOnDisconnect(self._lost_node, nodeid)
 
+    def _educate_the_new_peer(self, node):
+        node.callRemote("add_peers", new_peers=list(self.phonebook.items()))
+
+    def _announce_new_peer(self, new_nodeid, new_node_pburl):
+        for targetnode in self.connections.values():
+            targetnode.callRemote("add_peers",
+                                  new_peers=[(new_nodeid, new_node_pburl)])
+
     def _lost_node(self, nodeid):
         log.msg("lost contact with %s" % nodeid)
-        del self.active_peers[nodeid]
+        del self.phonebook[nodeid]
+        del self.connections[nodeid]
+        eventually(self._announce_lost_peer, nodeid)
+
+    def _announce_lost_peer(self, lost_nodeid):
+        for targetnode in self.connections.values():
+            targetnode.callRemote("lost_peers", lost_peers=[lost_nodeid])
+
 
 
 class Queen(service.MultiService):