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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_SYSTEM_LOGS_SYSTEM_LOGS_FETCHER_H_ | |
6 #define CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_SYSTEM_LOGS_FETCHER_H_ | |
7 | |
8 #include <stddef.h> | |
9 | |
10 #include <map> | |
11 #include <memory> | |
12 #include <string> | |
13 #include <vector> | |
14 | |
15 #include "base/callback.h" | |
16 #include "base/macros.h" | |
17 #include "base/memory/weak_ptr.h" | |
18 #include "chrome/browser/feedback/system_logs/system_logs_source.h" | |
19 #include "components/feedback/anonymizer_tool.h" | |
20 #include "components/feedback/feedback_common.h" | |
21 | |
22 namespace system_logs { | |
23 | |
24 // Callback that the SystemLogsFetcher uses to return data. | |
25 using SysLogsFetcherCallback = | |
26 base::Callback<void(std::unique_ptr<SystemLogsResponse>)>; | |
27 | |
28 // The SystemLogsFetcher fetches key-value data from a list of log sources. | |
29 // | |
30 // EXAMPLE: | |
31 // class Example { | |
32 // public: | |
33 // void ProcessLogs(SystemLogsResponse* response) { | |
34 // // do something with the logs | |
35 // } | |
36 // void GetLogs() { | |
37 // SystemLogsFetcher* fetcher = new SystemLogsFetcher(/*scrub_data=*/ true); | |
38 // fetcher->AddSource(base::MakeUnique<LogSourceOne>()); | |
39 // fetcher->AddSource(base::MakeUnique<LogSourceTwo>()); | |
40 // fetcher->Fetch(base::Bind(&Example::ProcessLogs, this)); | |
41 // } | |
42 // }; | |
43 class SystemLogsFetcher { | |
44 public: | |
45 // If scrub_data is true, logs will be anonymized. | |
46 // TODO(battre): This class needs to be expanded to provide better scrubbing | |
47 // of system logs. | |
48 explicit SystemLogsFetcher(bool scrub_data); | |
49 ~SystemLogsFetcher(); | |
50 | |
51 // Adds a source to use when fetching. | |
52 void AddSource(std::unique_ptr<SystemLogsSource> source); | |
53 | |
54 // Starts the fetch process. | |
55 void Fetch(const SysLogsFetcherCallback& callback); | |
56 | |
57 private: | |
58 // Callback passed to all the data sources. May call Scrub(), then calls | |
59 // AddResponse(). | |
60 void OnFetched(const std::string& source_name, SystemLogsResponse* response); | |
61 | |
62 // Merges the |response| it receives into response_. When all the data sources | |
63 // have responded, it deletes their objects and returns the response to the | |
64 // callback_. After this it deletes this instance of the object. | |
65 void AddResponse(const std::string& source_name, | |
66 SystemLogsResponse* response); | |
67 | |
68 std::vector<std::unique_ptr<SystemLogsSource>> data_sources_; | |
69 SysLogsFetcherCallback callback_; | |
70 | |
71 std::unique_ptr<SystemLogsResponse> response_; // The actual response data. | |
72 size_t num_pending_requests_; // The number of callbacks it should get. | |
73 | |
74 std::unique_ptr<feedback::AnonymizerTool> anonymizer_; | |
75 | |
76 base::WeakPtrFactory<SystemLogsFetcher> weak_ptr_factory_; | |
77 | |
78 DISALLOW_COPY_AND_ASSIGN(SystemLogsFetcher); | |
79 }; | |
80 | |
81 } // namespace system_logs | |
82 | |
83 #endif // CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_SYSTEM_LOGS_FETCHER_H_ | |
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