|  | // Copyright (c) 2012 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 CONTENT_BROWSER_STORAGE_PARTITION_IMPL_MAP_H_ | 
|  | #define CONTENT_BROWSER_STORAGE_PARTITION_IMPL_MAP_H_ | 
|  |  | 
|  | #include <map> | 
|  | #include <memory> | 
|  | #include <string> | 
|  | #include <unordered_set> | 
|  |  | 
|  | #include "base/callback_forward.h" | 
|  | #include "base/gtest_prod_util.h" | 
|  | #include "base/macros.h" | 
|  | #include "base/supports_user_data.h" | 
|  | #include "content/browser/storage_partition_impl.h" | 
|  | #include "content/public/browser/browser_context.h" | 
|  | #include "content/public/browser/storage_partition_config.h" | 
|  |  | 
|  | namespace base { | 
|  | class FilePath; | 
|  | class SequencedTaskRunner; | 
|  | }  // namespace base | 
|  |  | 
|  | namespace content { | 
|  |  | 
|  | class BrowserContext; | 
|  |  | 
|  | // A std::string to StoragePartition map for use with SupportsUserData APIs. | 
|  | class CONTENT_EXPORT StoragePartitionImplMap | 
|  | : public base::SupportsUserData::Data { | 
|  | public: | 
|  | explicit StoragePartitionImplMap(BrowserContext* browser_context); | 
|  |  | 
|  | ~StoragePartitionImplMap() override; | 
|  |  | 
|  | // This map retains ownership of the returned StoragePartition objects. | 
|  | StoragePartitionImpl* Get(const StoragePartitionConfig& partition_config, | 
|  | bool can_create); | 
|  |  | 
|  | // Starts an asynchronous best-effort attempt to delete all on-disk storage | 
|  | // related to |partition_domain|, avoiding any directories that are known to | 
|  | // be in use. | 
|  | // | 
|  | // |on_gc_required| is called if the AsyncObliterate() call was unable to | 
|  | // fully clean the on-disk storage requiring a call to GarbageCollect() on | 
|  | // the next browser start. | 
|  | void AsyncObliterate(const std::string& partition_domain, | 
|  | base::OnceClosure on_gc_required); | 
|  |  | 
|  | // Examines the on-disk storage and removes any entires that are not listed | 
|  | // in the |active_paths|, or in use by current entries in the storage | 
|  | // partition. | 
|  | // | 
|  | // The |done| closure is executed on the calling thread when garbage | 
|  | // collection is complete. | 
|  | void GarbageCollect( | 
|  | std::unique_ptr<std::unordered_set<base::FilePath>> active_paths, | 
|  | base::OnceClosure done); | 
|  |  | 
|  | void ForEach(BrowserContext::StoragePartitionCallback callback); | 
|  |  | 
|  | size_t size() const { return partitions_.size(); } | 
|  |  | 
|  | private: | 
|  | FRIEND_TEST_ALL_PREFIXES(StoragePartitionConfigTest, OperatorLess); | 
|  | FRIEND_TEST_ALL_PREFIXES(StoragePartitionImplMapTest, GarbageCollect); | 
|  |  | 
|  | typedef std::map<StoragePartitionConfig, | 
|  | std::unique_ptr<StoragePartitionImpl>> | 
|  | PartitionMap; | 
|  |  | 
|  | // Returns the relative path from the profile's base directory, to the | 
|  | // directory that holds all the state for storage contexts in the given | 
|  | // |partition_domain| and |partition_name|. | 
|  | static base::FilePath GetStoragePartitionPath( | 
|  | const std::string& partition_domain, | 
|  | const std::string& partition_name); | 
|  |  | 
|  | // This must always be called *after* |partition| has been added to the | 
|  | // partitions_. | 
|  | // | 
|  | // TODO(ajwong): Is there a way to make it so that Get()'s implementation | 
|  | // doesn't need to be aware of this ordering?  Revisit when refactoring | 
|  | // ResourceContext and AppCache to respect storage partitions. | 
|  | void PostCreateInitialization(StoragePartitionImpl* partition, | 
|  | bool in_memory); | 
|  |  | 
|  | BrowserContext* browser_context_;  // Not Owned. | 
|  | scoped_refptr<base::SequencedTaskRunner> file_access_runner_; | 
|  | PartitionMap partitions_; | 
|  |  | 
|  | // Set to true when the ResourceContext for the associated |browser_context_| | 
|  | // is initialized. Can never return to false. | 
|  | bool resource_context_initialized_; | 
|  |  | 
|  | DISALLOW_COPY_AND_ASSIGN(StoragePartitionImplMap); | 
|  | }; | 
|  |  | 
|  | }  // namespace content | 
|  |  | 
|  | #endif  // CONTENT_BROWSER_STORAGE_PARTITION_IMPL_MAP_H_ |