Gather trace data by waiting on handles with a fixed timeout

services/tracing/tracing_app.h

+// Copyright 2015 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.
+
+#ifndef SERVICES_TRACING_TRACING_APP_H_
+#define SERVICES_TRACING_TRACING_APP_H_
+
+#include "base/memory/scoped_vector.h"

[viettrungluu, 2015/04/02 19:54:13]

nit: include "base/macros.h"
probably also base/memory/scoped_ptr.h

+#include "mojo/common/weak_binding_set.h"
+#include "mojo/common/weak_interface_ptr_set.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "services/tracing/collector_impl.h"
+#include "services/tracing/trace_data_sink.h"
+#include "services/tracing/tracing.mojom.h"
+
+namespace tracing {
+
+class TracingApp : public mojo::ApplicationDelegate,
+                   public mojo::InterfaceFactory<TraceCoordinator>,
+                   public TraceCoordinator {
+ public:
+  TracingApp();
+  ~TracingApp() override;
+
+ private:
+  // mojo::ApplicationDelegate implementation.
+  bool ConfigureIncomingConnection(
+      mojo::ApplicationConnection* connection) override;
+
+  // mojo::InterfaceFactory<TraceCoordinator> implementation.
+  void Create(mojo::ApplicationConnection* connection,
+              mojo::InterfaceRequest<TraceCoordinator> request) override;
+
+  // tracing::TraceCoordinator implementation.
+  void Start(mojo::ScopedDataPipeProducerHandle stream,
+             const mojo::String& categories) override;
+  void StopAndFlush() override;
+
+  void AllDataCollected();
+
+  scoped_ptr<TraceDataSink> sink_;
+  ScopedVector<CollectorImpl> collector_impls_;
+  mojo::WeakInterfacePtrSet<TraceController> controller_ptrs_;
+  mojo::Binding<TraceCoordinator> coordinator_binding_;
+  bool tracing_active_;
+  mojo::String tracing_categories_;
+
+  DISALLOW_COPY_AND_ASSIGN(TracingApp);
+};
+
+}  // namespace tracing
+
+#endif  // SERVICES_TRACING_TRACING_APP_H_