| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SERVICES_CATALOG_ENTRY_CACHE_H_ |
| #define SERVICES_CATALOG_ENTRY_CACHE_H_ |
| |
| #include <map> |
| #include <memory> |
| #include <string> |
| |
| #include "base/macros.h" |
| |
| namespace catalog { |
| |
| class Entry; |
| |
| // Indexed storage for all existing service catalog entries. |
| class EntryCache { |
| public: |
| EntryCache(); |
| ~EntryCache(); |
| |
| // All entries in the cache, including non-root entries. |
| const std::map<std::string, const Entry*>& entries() const { |
| return entries_; |
| } |
| |
| // Adds a new root entry to the cache. If a root entry already exists |
| // corresponding to the new entry's name, the old root entry is removed first, |
| // along with its children. |
| // |
| // If a non-root entry already exists corresponding to the new entry's name, |
| // the new entry is ignored. |
| // |
| // Returns |true| if the entry was added and |false| otherwise. |
| // |
| // TODO(rockot): Duplicate entries should be treated as an error, but for now |
| // we tolerate them because of some remaining dependency on Package directory |
| // scanning, which in turn has some unpredictable behavior with respect to |
| // Entry registration. |
| bool AddRootEntry(std::unique_ptr<Entry> entry); |
| |
| // Queries the cache for an entry corresponding to |name|. Returns null if |
| // such an entry is not found. |
| const Entry* GetEntry(const std::string& name); |
| |
| private: |
| // Adds and entry and its children to |entries_|. Returns |true| if the Entry |
| // was successfully added and |false| otherwise. |
| bool AddEntry(const Entry* entry); |
| |
| // Removes an entry and its children from |entries_|. |
| void RemoveEntry(const Entry* entry); |
| |
| // Map of top-level service entries. This transitively owns all existing |
| // Entry objects. |
| std::map<std::string, std::unique_ptr<Entry>> root_entries_; |
| |
| // Map of service name to Entry. Each value points to an Entry owned either |
| // directly or indirectly by |entries_| above. This is essentially a flattened |
| // version of |entries_| with no ownership. |
| std::map<std::string, const Entry*> entries_; |
| |
| DISALLOW_COPY_AND_ASSIGN(EntryCache); |
| }; |
| |
| } // namespace catalog |
| |
| #endif // SERVICES_CATALOG_ENTRY_CACHE_H_ |