Implemented initial version of server-issued notification client.

chrome/browser/sync/notifier/cache_invalidation_packet_handler.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Class that handles the details of sending and receiving client
+// invalidation packets.
+
+#ifndef CHROME_BROWSER_SYNC_NOTIFIER_CACHE_INVALIDATION_PACKET_HANDLER_H_
+#define CHROME_BROWSER_SYNC_NOTIFIER_CACHE_INVALIDATION_PACKET_HANDLER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "talk/xmpp/jid.h"
+
+namespace buzz {
+class XmppClient;
+}  // namespace buzz
+
+namespace invalidation {
+class InvalidationClient;
+class NetworkEndpoint;
+}  // namespace invalidation
+
+namespace sync_notifier {
+
+// TODO(akalin): Add a NonThreadSafe member to this class and use it.
+
+class CacheInvalidationPacketHandler {
+ public:
+  // Starts routing packets from |invalidation_client| through
+  // |xmpp_client|.  |invalidation_client| must not already be routing
+  // packets through something.  Does not take ownership of
+  // |xmpp_client| or |invalidation_client|.
+  CacheInvalidationPacketHandler(
+      buzz::XmppClient* xmpp_client,
+      invalidation::InvalidationClient* invalidation_client);
+
+  // Makes the invalidation client passed into the constructor not
+  // route packets through the XMPP client passed into the constructor
+  // anymore.
+  ~CacheInvalidationPacketHandler();
+
+ private:
+  void HandleOutboundPacket(
+      invalidation::NetworkEndpoint* const& network_endpoint);
+
+  void HandleInboundPacket(const std::string& packet);
+
+  buzz::XmppClient* xmpp_client_;
+  invalidation::InvalidationClient* invalidation_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(CacheInvalidationPacketHandler);
+};
+
+}  // namespace sync_notifier
+
+#endif  // CHROME_BROWSER_SYNC_NOTIFIER_CACHE_INVALIDATION_PACKET_HANDLER_H_