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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_ | 5 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_ |
6 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_ | 6 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <string> | 9 #include <string> |
10 | 10 |
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40 // this interface. | 40 // this interface. |
41 class HandlerInterface { | 41 class HandlerInterface { |
42 public: | 42 public: |
43 virtual ~HandlerInterface() {} | 43 virtual ~HandlerInterface() {} |
44 | 44 |
45 // Called when the request is created. Executes the request implementation. | 45 // Called when the request is created. Executes the request implementation. |
46 // Returns false in case of a execution failure. | 46 // Returns false in case of a execution failure. |
47 virtual bool Execute(int request_id) = 0; | 47 virtual bool Execute(int request_id) = 0; |
48 | 48 |
49 // Success callback invoked by the providing extension in response to | 49 // Success callback invoked by the providing extension in response to |
50 // Execute(). It may be called more than once, until |has_next| is set to | 50 // Execute(). It may be called more than once, until |has_more| is set to |
51 // false. | 51 // false. |
52 virtual void OnSuccess(int request_id, | 52 virtual void OnSuccess(int request_id, |
53 scoped_ptr<RequestValue> result, | 53 scoped_ptr<RequestValue> result, |
54 bool has_next) = 0; | 54 bool has_more) = 0; |
55 | 55 |
56 // Error callback invoked by the providing extension in response to | 56 // Error callback invoked by the providing extension in response to |
57 // Execute(). It can be called at most once. It can be also called if the | 57 // Execute(). It can be called at most once. It can be also called if the |
58 // request is aborted due to a timeout. | 58 // request is aborted due to a timeout. |
59 virtual void OnError(int request_id, base::File::Error error) = 0; | 59 virtual void OnError(int request_id, base::File::Error error) = 0; |
60 }; | 60 }; |
61 | 61 |
62 // Observes activities in the request manager. | 62 // Observes activities in the request manager. |
63 class Observer { | 63 class Observer { |
64 public: | 64 public: |
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84 }; | 84 }; |
85 | 85 |
86 RequestManager(); | 86 RequestManager(); |
87 virtual ~RequestManager(); | 87 virtual ~RequestManager(); |
88 | 88 |
89 // Creates a request and returns its request id (greater than 0). Returns 0 in | 89 // Creates a request and returns its request id (greater than 0). Returns 0 in |
90 // case of an error (eg. too many requests). The |type| argument indicates | 90 // case of an error (eg. too many requests). The |type| argument indicates |
91 // what kind of request it is. | 91 // what kind of request it is. |
92 int CreateRequest(RequestType type, scoped_ptr<HandlerInterface> handler); | 92 int CreateRequest(RequestType type, scoped_ptr<HandlerInterface> handler); |
93 | 93 |
94 // Handles successful response for the |request_id|. If |has_next| is false, | 94 // Handles successful response for the |request_id|. If |has_more| is false, |
95 // then the request is disposed, after handling the |response|. On error, | 95 // then the request is disposed, after handling the |response|. On error, |
96 // returns false, and the request is disposed. | 96 // returns false, and the request is disposed. |
97 bool FulfillRequest(int request_id, | 97 bool FulfillRequest(int request_id, |
98 scoped_ptr<RequestValue> response, | 98 scoped_ptr<RequestValue> response, |
99 bool has_next); | 99 bool has_more); |
100 | 100 |
101 // Handles error response for the |request_id|. If handling the error fails, | 101 // Handles error response for the |request_id|. If handling the error fails, |
102 // returns false. Always disposes the request. | 102 // returns false. Always disposes the request. |
103 bool RejectRequest(int request_id, base::File::Error error); | 103 bool RejectRequest(int request_id, base::File::Error error); |
104 | 104 |
105 // Sets a custom timeout for tests. The new timeout value will be applied to | 105 // Sets a custom timeout for tests. The new timeout value will be applied to |
106 // new requests | 106 // new requests |
107 void SetTimeoutForTests(const base::TimeDelta& timeout); | 107 void SetTimeoutForTests(const base::TimeDelta& timeout); |
108 | 108 |
109 // Gets number of active requests for logging purposes. | 109 // Gets number of active requests for logging purposes. |
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143 base::WeakPtrFactory<RequestManager> weak_ptr_factory_; | 143 base::WeakPtrFactory<RequestManager> weak_ptr_factory_; |
144 ObserverList<Observer> observers_; | 144 ObserverList<Observer> observers_; |
145 | 145 |
146 DISALLOW_COPY_AND_ASSIGN(RequestManager); | 146 DISALLOW_COPY_AND_ASSIGN(RequestManager); |
147 }; | 147 }; |
148 | 148 |
149 } // namespace file_system_provider | 149 } // namespace file_system_provider |
150 } // namespace chromeos | 150 } // namespace chromeos |
151 | 151 |
152 #endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_ | 152 #endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_ |
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