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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_STORE_HANDLE_H_ |
| 6 #define SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_STORE_HANDLE_H_ |
| 7 |
| 8 #include <map> |
| 9 |
| 10 #include "base/memory/ref_counted.h" |
| 11 #include "base/memory/scoped_ptr.h" |
| 12 #include "base/stl_util.h" |
| 13 #include "base/threading/non_thread_safe.h" |
| 14 #include "sync/api/attachments/attachment_store.h" |
| 15 #include "sync/base/sync_export.h" |
| 16 |
| 17 namespace base { |
| 18 class SequencedTaskRunner; |
| 19 } // namespace base |
| 20 |
| 21 namespace sync_pb { |
| 22 class AttachmentId; |
| 23 } // namespace sync_pb |
| 24 |
| 25 namespace syncer { |
| 26 |
| 27 class Attachment; |
| 28 |
| 29 // AttachmentStoreHandle is helper to post AttachmentStore calls to backend on |
| 30 // different thread. Backend is expected to know on which thread to post |
| 31 // callbacks with results. |
| 32 // AttachmentStoreHandle takes ownership of backend. Backend is deleted on |
| 33 // backend thread. |
| 34 // AttachmentStoreHandle is not thread safe, it should only be accessed from |
| 35 // model thread. |
| 36 class SYNC_EXPORT AttachmentStoreHandle : public AttachmentStore, |
| 37 public base::NonThreadSafe { |
| 38 public: |
| 39 AttachmentStoreHandle( |
| 40 scoped_ptr<AttachmentStoreBackend> backend, |
| 41 const scoped_refptr<base::SequencedTaskRunner>& backend_task_runner); |
| 42 |
| 43 // AttachmentStore implementation. |
| 44 void Init(const InitCallback& callback) override; |
| 45 void Read(const AttachmentIdList& id, const ReadCallback& callback) override; |
| 46 void Write(const AttachmentList& attachments, |
| 47 const WriteCallback& callback) override; |
| 48 void Drop(const AttachmentIdList& id, const DropCallback& callback) override; |
| 49 void ReadMetadata(const AttachmentIdList& ids, |
| 50 const ReadMetadataCallback& callback) override; |
| 51 void ReadAllMetadata(const ReadMetadataCallback& callback) override; |
| 52 |
| 53 private: |
| 54 ~AttachmentStoreHandle() override; |
| 55 |
| 56 // AttachmentStoreHandle controls backend's lifetime. It is safe for |
| 57 // AttachmentStoreHandle to bind backend through base::Unretained for posts. |
| 58 // Backend is deleted on backend_task_runner, after that backend_ pointer is |
| 59 // invalid. |
| 60 scoped_ptr<AttachmentStoreBackend> backend_; |
| 61 scoped_refptr<base::SequencedTaskRunner> backend_task_runner_; |
| 62 |
| 63 DISALLOW_COPY_AND_ASSIGN(AttachmentStoreHandle); |
| 64 }; |
| 65 |
| 66 } // namespace syncer |
| 67 |
| 68 #endif // SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_STORE_HANDLE_H_ |
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