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content / browser / indexed_db / instance / connection.h [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_INDEXED_DB_INSTANCE_CONNECTION_H_
#define CONTENT_BROWSER_INDEXED_DB_INSTANCE_CONNECTION_H_
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>
#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "components/services/storage/privileged/mojom/indexed_db_client_state_checker.mojom.h"
#include "components/services/storage/public/cpp/buckets/bucket_info.h"
#include "components/services/storage/public/cpp/buckets/bucket_locator.h"
#include "content/browser/indexed_db/instance/bucket_context_handle.h"
#include "content/browser/indexed_db/instance/database.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/pending_associated_receiver.h"
#include "mojo/public/cpp/bindings/pending_associated_remote.h"
#include "mojo/public/cpp/bindings/remote_set.h"
#include "third_party/blink/public/common/indexeddb/indexeddb_key.h"
#include "third_party/blink/public/common/indexeddb/indexeddb_key_path.h"
#include "third_party/blink/public/mojom/indexeddb/indexeddb.mojom.h"
namespace blink {
class IndexedDBKeyRange;
}
namespace content::indexed_db {
class DatabaseCallbacks;
class DatabaseError;
class Transaction;
class BucketContext;
// This class maps to an IDB database *connection*:
// https://www.w3.org/TR/IndexedDB/#database-connection
//
// It has a 1:1 relationship with the Blink class IDBDatabase.
//
// It is created and operated on a bucket thread.
class CONTENT_EXPORT Connection : public blink::mojom::IDBDatabase {
public:
// Transfers ownership of an existing `connection` instance to a self owned
// receiver. `Connection` instances begin life owned by a
// `unique_ptr` in a pending state without any bound mojo remotes. IndexedDB
// open database operations use this function to establish the connection
// after the database is ready for use.
static mojo::PendingAssociatedRemote<blink::mojom::IDBDatabase>
MakeSelfOwnedReceiverAndBindRemote(std::unique_ptr<Connection> connection);
Connection(BucketContext& bucket_context,
base::WeakPtr<Database> database,
base::RepeatingClosure on_version_change_ignored,
base::OnceCallback<void(Connection*)> on_close,
std::unique_ptr<DatabaseCallbacks> callbacks,
mojo::Remote<storage::mojom::IndexedDBClientStateChecker>
client_state_checker,
base::UnguessableToken client_token,
int scheduling_priority);
Connection(const Connection&) = delete;
Connection& operator=(const Connection&) = delete;
~Connection() override;
base::WeakPtr<Connection> GetWeakPtr() { return weak_factory_.GetWeakPtr(); }
base::WeakPtr<Database> database() const { return database_; }
DatabaseCallbacks* callbacks() const { return callbacks_.get(); }
const base::UnguessableToken& client_token() const { return client_token_; }
const std::map<int64_t, std::unique_ptr<Transaction>>& transactions() const {
return transactions_;
}
// Unfortunately, for historical reasons, this version of `IsConnected()` is
// not the same as whether `this` is connected via Mojo.
bool IsConnected() const;
// Since `this` is a self-owned mojo receiver (see
// `MakeSelfOwnedReceiverAndBindRemote()`, this accessor is required to
// determine whether the mojo connection is inactive, which is synonymous with
// whether `this` is being destroyed.
bool is_shutting_down() const { return is_shutting_down_; }
int32_t id() const { return id_; }
Transaction* CreateVersionChangeTransaction(
int64_t id,
const std::set<int64_t>& scope,
BackingStore::Transaction* backing_store_transaction);
// Checks if the client is in inactive state and disallow it from activation
// if so. This is called when the client is not supposed to be inactive,
// otherwise it may affect the IndexedDB service (e.g. blocking others from
// acquiring the locks).
void DisallowInactiveClient(
storage::mojom::DisallowInactiveClientReason reason,
base::OnceCallback<void(bool)> callback);
// We ignore calls where the id doesn't exist to facilitate the AbortAll call.
// TODO(dmurph): Change that so this doesn't need to ignore unknown ids.
void RemoveTransaction(int64_t id);
void AbortTransactionAndTearDownOnError(Transaction* transaction,
const DatabaseError& error);
void CloseAndReportForceClose();
int scheduling_priority() const { return scheduling_priority_; }
// Returns true if `this_one` should skip ahead of `other` when being added to
// the lock manager/scheduler. Two lock requests (which can be associated with
// transactions or new connection requests) will never be reordered if they
// come from the same client (window/worker context).
static bool HasHigherPriorityThan(const PartitionedLockHolder* this_one,
const PartitionedLockHolder& other);
private:
friend class TransactionTest;
FRIEND_TEST_ALL_PREFIXES(DatabaseTest, ForcedClose);
FRIEND_TEST_ALL_PREFIXES(DatabaseTest, PendingDelete);
FRIEND_TEST_ALL_PREFIXES(TransactionTest, PostedStartTaskRunAfterAbort);
// blink::mojom::IDBDatabase implementation
void RenameObjectStore(int64_t transaction_id,
int64_t object_store_id,
const std::u16string& new_name) override;
void CreateTransaction(
mojo::PendingAssociatedReceiver<blink::mojom::IDBTransaction>
transaction_receiver,
int64_t transaction_id,
const std::vector<int64_t>& object_store_ids,
blink::mojom::IDBTransactionMode mode,
blink::mojom::IDBTransactionDurability durability) override;
void VersionChangeIgnored() override;
void Get(int64_t transaction_id,
int64_t object_store_id,
int64_t index_id,
const blink::IndexedDBKeyRange& key_range,
bool key_only,
blink::mojom::IDBDatabase::GetCallback callback) override;
void GetAll(int64_t transaction_id,
int64_t object_store_id,
int64_t index_id,
const blink::IndexedDBKeyRange& key_range,
bool key_only,
int64_t max_count,
blink::mojom::IDBDatabase::GetAllCallback callback) override;
void SetIndexKeys(
int64_t transaction_id,
int64_t object_store_id,
const blink::IndexedDBKey& primary_key,
const std::vector<blink::IndexedDBIndexKeys>& index_keys) override;
void SetIndexesReady(int64_t transaction_id,
int64_t object_store_id,
const std::vector<int64_t>& index_ids) override;
void OpenCursor(
int64_t transaction_id,
int64_t object_store_id,
int64_t index_id,
const blink::IndexedDBKeyRange& key_range,
blink::mojom::IDBCursorDirection direction,
bool key_only,
blink::mojom::IDBTaskType task_type,
blink::mojom::IDBDatabase::OpenCursorCallback callback) override;
void Count(int64_t transaction_id,
int64_t object_store_id,
int64_t index_id,
const blink::IndexedDBKeyRange& key_range,
CountCallback callback) override;
void DeleteRange(int64_t transaction_id,
int64_t object_store_id,
const blink::IndexedDBKeyRange& key_range,
DeleteRangeCallback success_callback) override;
void GetKeyGeneratorCurrentNumber(
int64_t transaction_id,
int64_t object_store_id,
GetKeyGeneratorCurrentNumberCallback callback) override;
void Clear(int64_t transaction_id,
int64_t object_store_id,
ClearCallback callback) override;
void CreateIndex(int64_t transaction_id,
int64_t object_store_id,
int64_t index_id,
const std::u16string& name,
const blink::IndexedDBKeyPath& key_path,
bool unique,
bool multi_entry) override;
void DeleteIndex(int64_t transaction_id,
int64_t object_store_id,
int64_t index_id) override;
void RenameIndex(int64_t transaction_id,
int64_t object_store_id,
int64_t index_id,
const std::u16string& new_name) override;
void Abort(int64_t transaction_id) override;
void DidBecomeInactive() override;
void UpdatePriority(int new_priority) override;
// It is an error to call either of these after `IsConnected()`
// is no longer true.
const storage::BucketInfo& GetBucketInfo();
storage::BucketLocator GetBucketLocator();
Transaction* GetTransaction(int64_t id) const;
enum class CloseErrorHandling {
// Returns from the function on the first encounter with an error.
kReturnOnFirstError,
// Continues to call Abort() on all transactions despite any errors.
// The last error encountered is returned.
kAbortAllReturnLastError,
};
// The return value is `callbacks_`, passing ownership.
std::unique_ptr<DatabaseCallbacks> AbortTransactionsAndClose(
CloseErrorHandling error_handling);
// Returns the last error that occurred, if there is any.
Status AbortAllTransactionsAndIgnoreErrors(const DatabaseError& error);
Status AbortAllTransactions(const DatabaseError& error);
BucketContext* bucket_context() {
return bucket_context_handle_.bucket_context();
}
const int32_t id_;
// Keeps the factory for this bucket alive.
BucketContextHandle bucket_context_handle_;
base::WeakPtr<Database> database_;
base::RepeatingClosure on_version_change_ignored_;
base::OnceCallback<void(Connection*)> on_close_;
// The connection owns transactions created on this connection. It's important
// to preserve ordering.
std::map<int64_t, std::unique_ptr<Transaction>> transactions_;
// The callbacks_ member is cleared when the connection is closed.
// May be nullptr in unit tests.
std::unique_ptr<DatabaseCallbacks> callbacks_;
mojo::Remote<storage::mojom::IndexedDBClientStateChecker>
client_state_checker_;
mojo::RemoteSet<storage::mojom::IndexedDBClientKeepActive>
client_keep_active_remotes_;
// Uniquely identifies the document or worker that owns the other side of this
// connection, i.e. the "client" of `client_state_checker_`. Since multiple
// transactions/connections associated with a single client should never cause
// that client to be ineligible for BFCache, this token is used to avoid
// unnecessary calls to `DisallowInactiveClient()`.
base::UnguessableToken client_token_;
SEQUENCE_CHECKER(sequence_checker_);
// The priority for transactions made on this connection. This corresponds to
// the renderer's scheduler throttling state. See `HasHigherPriorityThan()`
// for prioritization logic.
int scheduling_priority_;
bool is_shutting_down_ = false;
base::WeakPtrFactory<Connection> weak_factory_{this};
};
} // namespace content::indexed_db
#endif // CONTENT_BROWSER_INDEXED_DB_INSTANCE_CONNECTION_H_