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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_BROWSER_FEEDBACK_TRACING_MANAGER_H_ | |
| 6 #define CHROME_BROWSER_FEEDBACK_TRACING_MANAGER_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/basictypes.h" | |
| 12 #include "base/callback.h" | |
| 13 #include "base/memory/scoped_ptr.h" | |
| 14 #include "base/memory/weak_ptr.h" | |
| 15 | |
| 16 namespace base { | |
| 17 | |
| 18 class RefCountedString; | |
| 19 class FilePath; | |
| 20 | |
| 21 } | |
| 22 // Callback used for getting the output of a trace. | |
| 23 typedef base::Callback<void(scoped_refptr<base::RefCountedString> trace_data)> | |
| 24 TraceDataCallback; | |
| 25 | |
| 26 // This class is used to manage performance metrics that can be attached to | |
| 27 // feedback reports. This class is a Singleton that is owned by the preference | |
| 28 // system. It should only be created when it is enabled, and should only be | |
| 29 // accessed elsewhere via Get(). | |
| 30 // | |
| 31 // When a performance trace is desired, TracingManager::Get()->RequestTrace() | |
| 32 // should be invoked. The TracingManager will then start preparing a zipped | |
| 33 // version of the performance data. That data can then be requested via | |
| 34 // GetTraceData(). When the data is no longer needed, it should be discarded | |
| 35 // via DiscardTraceData(). | |
| 36 class TracingManager { | |
| 37 public: | |
| 38 virtual ~TracingManager(); | |
| 39 | |
| 40 // Create a TracingManager. Can only be called when none exists. | |
| 41 static scoped_ptr<TracingManager> Create(); | |
| 42 | |
| 43 // Get the current TracingManager. Returns NULL if one doesn't exist. | |
| 44 static TracingManager* Get(); | |
| 45 | |
| 46 // Request a trace ending at the current time. If a trace is already being | |
| 47 // collected, the id for that trace is returned. | |
| 48 int RequestTrace(); | |
| 49 | |
| 50 // Get the trace data for |id|. On success, true is returned, and the data is | |
| 51 // returned via |callback|. Returns false on failure. | |
| 52 bool GetTraceData(int id, const TraceDataCallback& callback); | |
| 53 | |
| 54 // Discard the data for trace |id|. | |
| 55 void DiscardTraceData(int id); | |
| 56 | |
| 57 private: | |
| 58 TracingManager(); | |
| 59 | |
| 60 void StartTracing(); | |
| 61 void OnTraceDataCollected(const base::FilePath& path); | |
| 62 | |
| 63 // ID of the trace that is being collected. | |
| 64 int current_trace_id_; | |
| 65 | |
| 66 // Mapping of trace ID to trace data. | |
| 67 std::map<int, scoped_refptr<base::RefCountedString> > trace_data_; | |
| 68 | |
| 69 // Callback for the current trace request. | |
| 70 TraceDataCallback trace_callback_; | |
| 71 | |
| 72 base::WeakPtrFactory<TracingManager> weak_ptr_factory_; | |
| 73 | |
| 74 DISALLOW_COPY_AND_ASSIGN(TracingManager); | |
| 75 }; | |
| 76 | |
| 77 #endif // CHROME_BROWSER_FEEDBACK_TRACING_MANAGER_H_ | |
| 78 | |
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Chromium Code Reviews
Issue 225183018:
Move feedback files into src/components (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master