Copy the (early prototype of) remoting in Chrome into the public tree....

remoting/host/heartbeat_sender.cc

+// 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.
+
+#include "remoting/host/heartbeat_sender.h"
+
+#include "base/logging.h"
+#include "base/message_loop.h"
+#include "remoting/base/constants.h"
+#include "remoting/jingle_glue/iq_request.h"
+#include "remoting/jingle_glue/jingle_client.h"
+#include "remoting/jingle_glue/jingle_thread.h"
+#include "talk/xmpp/constants.h"
+#include "talk/xmllite/xmlelement.h"
+
+namespace remoting {
+
+namespace {
+const char * const kChromotingNamespace = "google:remoting";
+const buzz::QName kHeartbeatQuery(true, kChromotingNamespace, "heartbeat");
+const buzz::QName kHostIdAttr(true, kChromotingNamespace, "hostid");
+
+// TODO(sergeyu): Make this configurable by the cloud.
+const int64 kHeartbeatPeriodMs = 5 * 60 * 1000;  // 5 minutes.
+}
+
+HeartbeatSender::HeartbeatSender()
+    : started_(false) {
+}
+
+void HeartbeatSender::Start(JingleClient* jingle_client,
+                            const std::string& host_id) {
+  DCHECK(jingle_client);
+  DCHECK(!started_);
+
+  started_ = true;
+
+  jingle_client_ = jingle_client;
+  host_id_ = host_id;
+
+  jingle_client_->message_loop()->PostTask(
+      FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::DoStart));
+}
+
+void HeartbeatSender::DoStart() {
+  DCHECK(MessageLoop::current() == jingle_client_->message_loop());
+
+  request_.reset(new IqRequest(jingle_client_));
+
+  jingle_client_->message_loop()->PostTask(
+      FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::DoSendStanza));
+}
+
+void HeartbeatSender::DoSendStanza() {
+  DCHECK(MessageLoop::current() == jingle_client_->message_loop());
+
+  LOG(INFO) << "Sending heartbeat stanza to " << kChromotingBotJid;
+
+  buzz::XmlElement* stanza = new buzz::XmlElement(kHeartbeatQuery);
+  stanza->AddAttr(kHostIdAttr, host_id_);
+  request_->SendIq(buzz::STR_SET, kChromotingBotJid, stanza);
+
+  // Schedule next heartbeat.
+  jingle_client_->message_loop()->PostDelayedTask(
+      FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::DoSendStanza),
+      kHeartbeatPeriodMs);
+}
+
+}  // namespace remoting