RAPPOR implementation

components/rappor/rappor_recorder.cc

+// Copyright (c) 2012 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/rappor/rappor_recorder.h"
+
+#include "base/at_exit.h"
+#include "base/debug/leak_annotations.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/synchronization/lock.h"
+#include "components/rappor/rappor.h"
+
+namespace rappor {
+
+// Initialize rappor gathering system.
+base::LazyInstance<RapporRecorder>::Leaky g_rappor_recorder =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
+void RapporRecorder::DeleteRappors(Rappors* rappors) {
+  for (Rappors::iterator it = rappors->begin(); rappors->end() != it; ++it) {
+    delete *it;
+  }
+  rappors->clear();
+}
+
+void RapporRecorder::CollectRappors(Rappors* output) {
+  base::AutoLock auto_lock(lock_);
+
+  for (RapporMap::iterator it = rappors_.begin(); rappors_.end() != it; ++it) {
+    DCHECK_EQ(it->first, it->second->parameters()->rappor_name);
+    output->push_back(it->second);
+  }
+  rappors_.clear();
+}
+
+void RapporRecorder::RecordSamples(const RapporParameters* parameters,
+                                   const std::vector<std::string>& samples) {
+  base::AutoLock auto_lock(lock_);
+
+  Rappor* rappor = GetRappor(parameters);
+  rappor->AddSamples(samples);
+}
+
+Rappor* RapporRecorder::GetRappor(const RapporParameters* parameters) {
+  RapporMap::iterator it = rappors_.find(parameters->rappor_name);
+  if (rappors_.end() != it) {
+    Rappor* rappor = it->second;
+    DCHECK_EQ(parameters, rappor->parameters());
+    return rappor;
+  }
+
+  Rappor* new_rappor = new Rappor(parameters);
+  rappors_[parameters->rappor_name] = new_rappor;
+  return new_rappor;
+}
+
+RapporRecorder::RapporRecorder() {}
+
+RapporRecorder::~RapporRecorder() {
+  Rappors rappors;
+  CollectRappors(&rappors);
+  DeleteRappors(&rappors);
+}
+
+}  // namespace rappor