Add activity recording capability to gcm internals page. User can refresh, start/stop recording, an…

google_apis/gcm/monitoring/gcm_stats_recorder.cc

Index: google_apis/gcm/monitoring/gcm_stats_recorder.cc
diff --git a/google_apis/gcm/monitoring/gcm_stats_recorder.cc b/google_apis/gcm/monitoring/gcm_stats_recorder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6e0cb48d7b57b0c0d0c6962886e71e77d47ba24b
--- /dev/null
+++ b/google_apis/gcm/monitoring/gcm_stats_recorder.cc
@@ -0,0 +1,150 @@
+// Copyright 2014 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 "google_apis/gcm/monitoring/gcm_stats_recorder.h"
+
+#include <deque>
+#include <vector>
+
+#include "base/logging.h"
+#include "base/metrics/histogram.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+
+namespace gcm {
+
+const uint32 MAX_LOGGED_ACTIVITY_COUNT = 100;
+
+namespace {
+
+// Insert an itme to the front of deque while maintaining the size of the deque.
+// Overflow item is discarded.
+template <typename T>
+T* InsertCircularBuffer(std::deque<T>* q, const T& item) {
+  DCHECK(q);
+  q->push_front(item);
+  if (q->size() > MAX_LOGGED_ACTIVITY_COUNT) {
+    q->pop_back();
+  }
+  return &q->front();
+}
+
+// Helper for getting string representation of the MessageSendStatus enum.
+std::string GetMessageSendStatusString(
+    gcm::MCSClient::MessageSendStatus status) {
+  switch (status) {
+    case gcm::MCSClient::QUEUED:
+      return "QUEUED";
+    case gcm::MCSClient::SENT:
+      return "SENT";
+    case gcm::MCSClient::QUEUE_SIZE_LIMIT_REACHED:
+      return "QUEUE_SIZE_LIMIT_REACHED";
+    case gcm::MCSClient::APP_QUEUE_SIZE_LIMIT_REACHED:
+      return "APP_QUEUE_SIZE_LIMIT_REACHED";
+    case gcm::MCSClient::MESSAGE_TOO_LARGE:
+      return "MESSAGE_TOO_LARGE";
+    case gcm::MCSClient::NO_CONNECTION_ON_ZERO_TTL:
+      return "NO_CONNECTION_ON_ZERO_TTL";
+    case gcm::MCSClient::TTL_EXCEEDED:
+      return "TTL_EXCEEDED";
+    default:
+      NOTREACHED();
+      return "UNKNOWN";
+  }
+}
+
+}  // namespace
+
+GCMStatsRecorder::Activity::Activity()
+    : time(base::Time::Now()) {
+}
+
+GCMStatsRecorder::Activity::~Activity() {
+}
+
+GCMStatsRecorder::SendingActivity::SendingActivity() {
+}
+
+GCMStatsRecorder::SendingActivity::~SendingActivity() {
+}
+
+GCMStatsRecorder::GCMStatsRecorder() : is_recording_(false) {
+}
+
+GCMStatsRecorder::~GCMStatsRecorder() {
+}
+
+void GCMStatsRecorder::SetRecording(bool recording) {
+  is_recording_ = recording;
+}
+
+void GCMStatsRecorder::Clear() {
+  sending_activities_.clear();
+}
+
+void GCMStatsRecorder::CollectSendingActivities(
+    std::vector<SendingActivity>* activities) const {
+  activities->insert(activities->begin(),
+                     sending_activities_.begin(),
+                     sending_activities_.end());
+}
+
+void GCMStatsRecorder::RecordSending(const std::string& app_id,
+                                     const std::string& receiver_id,
+                                     const std::string& message_id,
+                                     const std::string& event,
+                                     const std::string& details) {
+  SendingActivity data;
+  SendingActivity* inserted_data = InsertCircularBuffer(
+      &sending_activities_, data);
+  inserted_data->app_id = app_id;
+  inserted_data->receiver_id = receiver_id;
+  inserted_data->message_id = message_id;
+  inserted_data->event = event;
+  inserted_data->details = details;
+}
+
+void GCMStatsRecorder::RecordDataSentToWire(
+    const std::string& app_id,
+    const std::string& receiver_id,
+    const std::string& message_id,
+    int queued) {
+  if (is_recording_) {
+    RecordSending(app_id, receiver_id, message_id, "Data msg sent to wire",
+                  base::StringPrintf("Msg queued for %d seconds", queued));
+  }
+}
+
+void GCMStatsRecorder::RecordNotifySendStatus(
+    const std::string& app_id,
+    const std::string& receiver_id,
+    const std::string& message_id,
+    gcm::MCSClient::MessageSendStatus status,
+    int byte_size,
+    int ttl) {
+  UMA_HISTOGRAM_ENUMERATION("GCM.SendMessageStatus", status,
+                            gcm::MCSClient::SEND_STATUS_COUNT);
+  if (is_recording_) {
+    RecordSending(
+        app_id,
+        receiver_id,
+        message_id,
+        base::StringPrintf("SEND status: %s",
+                           GetMessageSendStatusString(status).c_str()),
+        base::StringPrintf("Msg size: %d bytes, TTL: %d", byte_size, ttl));
+  }
+}
+
+void GCMStatsRecorder::RecordIncomingSendError(
+    const std::string& app_id,
+    const std::string& receiver_id,
+    const std::string& message_id) {
+  UMA_HISTOGRAM_COUNTS("GCM.IncomingSendErrors", 1);
+  if (is_recording_) {
+    RecordSending(app_id, receiver_id, message_id, "Received 'send error' msg",
+                  std::string());
+  }
+}
+
+}  // namespace gcm