Initial UKMPageLoadMetricsObserver

components/ukm/ukm_service.cc

 // Copyright 2017 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 "components/ukm/ukm_service.h"
 
 #include <utility>
 
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/rand_util.h"
 #include "base/time/time.h"
 #include "components/metrics/metrics_log_uploader.h"
 #include "components/metrics/metrics_service_client.h"
 #include "components/metrics/proto/ukm/report.pb.h"
+#include "components/metrics/proto/ukm/source.pb.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
 #include "components/ukm/metrics_reporting_scheduler.h"
 #include "components/ukm/persisted_logs_metrics_impl.h"
 #include "components/ukm/ukm_pref_names.h"
+#include "components/ukm/ukm_source.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace ukm {
 
 namespace {
 
 const base::Feature kUkmFeature = {"Ukm", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const char kMimeType[] = "application/vnd.chrome.ukm";
 
@@ skipping 19 matching lines @@
 // This ensures that a reasonable amount of history will be stored even if there
 // is a long series of very small logs.
 const int kMinPersistedBytes = 300000;
 
 // If an upload fails, and the transmission was over this byte count, then we
 // will discard the log, and not try to retransmit it.  We also don't persist
 // the log to the prefs for transmission during the next chrome session if this
 // limit is exceeded.
 const size_t kMaxLogRetransmitSize = 100 * 1024;
 
+// Maximum number of Sources we'll keep around before dropping new ones.
+const size_t kMaxSourcesLength = 100;
+
 std::string GetServerUrl() {
   std::string server_url = variations::GetVariationParamValue(
       kUkmRolloutFieldTrialName, kUkmRolloutServerUrlParam);
   if (!server_url.empty())
     return server_url;
   return kDefaultServerUrl;
 }
 
 uint64_t LoadOrGenerateClientId(PrefService* pref_service) {
   uint64_t client_id = pref_service->GetInteger(prefs::kUkmClientId);
@@ skipping 96 matching lines @@
   }
   StartScheduledUpload();
 }
 
 void UkmService::BuildAndStoreLog() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DVLOG(1) << "UkmService::BuildAndStoreLog";
   Report report;
   report.set_client_id(client_id_);
   // TODO(holte): Populate system_profile.
-  // TODO(zhenw): Populate sources.
+
+  for (auto& source : sources_) {

[Steven Holte, 2017/01/09 18:23:39]

It seems like we probably want to drop Sources we've serialized to the log after
we've converted them to protos, so we don't just keep sending them.

[oystein (OOO til 10th of July), 2017/01/24 19:21:41]

Done.

+    Source* proto_source = report.add_sources();
+    source->PopulateProto(proto_source);
+  }
+
   std::string serialized_log;
   report.SerializeToString(&serialized_log);
   persisted_logs_.StoreLog(serialized_log);
 }
 
 void UkmService::StartScheduledUpload() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!log_upload_in_progress_);
   persisted_logs_.StageLog();
   // TODO(holte): Handle data usage on cellular, etc.
@@ skipping 36 matching lines @@
     // Store the updated list to disk now that the removed log is uploaded.
     persisted_logs_.SerializeLogs();
   }
 
   // Error 400 indicates a problem with the log, not with the server, so
   // don't consider that a sign that the server is in trouble.
   bool server_is_healthy = upload_succeeded || response_code == 400;
   scheduler_->UploadFinished(server_is_healthy, !persisted_logs_.empty());
 }
 
+void UkmService::RecordSource(std::unique_ptr<UkmSource> source) {
+  if (sources_.size() >= kMaxSourcesLength)
+    return;
+
+  sources_.push_back(std::move(source));
+}
+
 }  // namespace ukm