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 SYNC_UTIL_EXTENSIONS_ACTIVITY_H_ 6 #define SYNC_UTIL_EXTENSIONS_ACTIVITY_H_ 7 8 #include <map> 9 #include <string> 10 11 #include "base/basictypes.h" 12 #include "base/memory/ref_counted.h" 13 #include "base/synchronization/lock.h" 14 #include "sync/base/sync_export.h" 15 16 namespace syncer { 17 18 // A storage to record usage of extensions APIs to send to sync 19 // servers, with the ability to purge data once sync servers have 20 // acknowledged it (successful commit response). 21 class SYNC_EXPORT ExtensionsActivity 22 : public base::RefCountedThreadSafe<ExtensionsActivity> { 23 public: 24 // A data record of activity performed by extension |extension_id|. 25 struct SYNC_EXPORT Record { 26 Record(); 27 ~Record(); 28 29 // The human-readable ID identifying the extension responsible 30 // for the activity reported in this Record. 31 std::string extension_id; 32 33 // How many times the extension successfully invoked a write 34 // operation through the bookmarks API since the last CommitMessage. 35 uint32 bookmark_write_count; 36 }; 37 38 typedef std::map<std::string, Record> Records; 39 40 ExtensionsActivity(); 41 42 // Fill |buffer| with all current records and then clear the 43 // internal records. Called on sync thread to append records to sync commit 44 // message. 45 void GetAndClearRecords(Records* buffer); 46 47 // Merge |records| with the current set of records. Called on sync thread to 48 // put back records if sync commit failed. 49 void PutRecords(const Records& records); 50 51 // Increment write count of the specified extension. 52 void UpdateRecord(const std::string& extension_id); 53 54 private: 55 friend class base::RefCountedThreadSafe<ExtensionsActivity>; 56 ~ExtensionsActivity(); 57 58 Records records_; 59 mutable base::Lock records_lock_; 60 }; 61 62 } // namespace syncer 63 64 #endif // SYNC_UTIL_EXTENSIONS_ACTIVITY_H_ 65