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1 // Copyright 2012 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_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_ | |
6 #define SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_ | |
7 | |
8 #include <stddef.h> | |
9 #include <stdint.h> | |
10 | |
11 #include <string> | |
12 | |
13 #include "base/compiler_specific.h" | |
14 #include "base/macros.h" | |
15 #include "sync/api/attachments/attachment_id.h" | |
16 #include "sync/base/sync_export.h" | |
17 #include "sync/internal_api/public/base_transaction.h" | |
18 | |
19 namespace tracked_objects { | |
20 class Location; | |
21 } // namespace tracked_objects | |
22 | |
23 namespace sync_pb { | |
24 class DataTypeContext; | |
25 } | |
26 | |
27 namespace syncer { | |
28 | |
29 struct UserShare; | |
30 | |
31 // Sync API's ReadTransaction is a read-only BaseTransaction. It wraps | |
32 // a syncable::ReadTransaction. | |
33 class SYNC_EXPORT ReadTransaction : public BaseTransaction { | |
34 public: | |
35 // Start a new read-only transaction on the specified repository. | |
36 ReadTransaction(const tracked_objects::Location& from_here, | |
37 UserShare* share); | |
38 | |
39 // Resume the middle of a transaction. Will not close transaction. | |
40 ReadTransaction(UserShare* share, syncable::BaseTransaction* trans); | |
41 | |
42 ~ReadTransaction() override; | |
43 | |
44 // BaseTransaction override. | |
45 syncable::BaseTransaction* GetWrappedTrans() const override; | |
46 | |
47 // Return |transaction_version| of |type| stored in sync directory's | |
48 // persisted info. | |
49 int64_t GetModelVersion(ModelType type) const; | |
50 | |
51 // Fills |context| with the datatype context associated with |type|. | |
52 void GetDataTypeContext(ModelType type, | |
53 sync_pb::DataTypeContext* context) const; | |
54 | |
55 // Clear |ids| and fill it with the ids of attachments that need to be | |
56 // uploaded to the sync server. | |
57 void GetAttachmentIdsToUpload(ModelType type, AttachmentIdList* ids) const; | |
58 | |
59 // Return the current (opaque) store birthday. | |
60 std::string GetStoreBirthday() const; | |
61 | |
62 private: | |
63 void* operator new(size_t size); // Transaction is meant for stack use only. | |
64 | |
65 // The underlying syncable object which this class wraps. | |
66 syncable::BaseTransaction* transaction_; | |
67 bool close_transaction_; | |
68 | |
69 DISALLOW_COPY_AND_ASSIGN(ReadTransaction); | |
70 }; | |
71 | |
72 } // namespace syncer | |
73 | |
74 #endif // SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_ | |
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