Files
firebase-ios-sdk/Firestore/Source/Local/FSTLevelDBQueryCache.h
T
Greg Soltis 352b790b6e Switch FSTLevelDBQueryCache to use transactions (#942)
* Start work on leveldb transactions

* Style

* Working API. Not plumbed in yet

* Move files into correct place

* Wrangling file locations and associations

* Tests pass

* Add some comments

* style

* Fix copyright

* Rewrite iterator internals to handle deletion-while-iterating. Also add tests for same

* Switch to strings instead of slices

* Style

* More style fixes

* Start switching writegroup over

* Swap out write group tracking for transaction usage

* Style

* Response to feedback before updating docs

* Style

* Add comment

* Initialize version_

* Satisfy the linter

* Start switching writegroup over

* Swap out write group tracking for transaction usage

* Style

* Checkpoint before implementing BatchDescription

* Style

* Initial plumbing for leveldb local parts

* Add model::BatchId

* Port leveldb_key.{h,cc}

* Add string StartsWith

* Add leveldb_key_test.cc to the project

* Revert back to using leveldb::Slice for read/describe

These operations universally operate on keys obtained from leveldb so
it's actually unhelpful to force all the callers to make
absl::string_views from them.

* Everything passing

* Drop unused function

* Style

* STart work on reads

* Swap reads in queryCache to use transactions

* Fix up tests of querycache

* Drop commented out code

* Cleanup

* Style

* Fix up for passing tests

* style

* Renaming

* Style

* Start work on ToString for transactions

* Add ToString() method to LevelDbTransaction

* Style

* lint

* Fix includes, drop runTransaction

* current_transaction -> currentTransaction

* LevelDbTransaction::NewIterator now returns a unique_ptr

* Style

* Revert addition of util::StartsWith

* Add log line

* Style

* Add log line

* Style

* Add debug log line for commits, drop unused BatchDescription

* Fix an include, but mostly try to trigger a travis build
2018-03-22 17:31:16 -07:00

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1.9 KiB
Objective-C

/*
* Copyright 2017 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import <Foundation/Foundation.h>
#include <memory>
#import "Firestore/Source/Local/FSTQueryCache.h"
#include "Firestore/core/src/firebase/firestore/local/leveldb_transaction.h"
#include "leveldb/db.h"
@class FSTLevelDB;
@class FSTLocalSerializer;
@class FSTPBTargetGlobal;
@protocol FSTGarbageCollector;
NS_ASSUME_NONNULL_BEGIN
/** Cached Queries backed by LevelDB. */
@interface FSTLevelDBQueryCache : NSObject <FSTQueryCache>
/**
* Retrieves the global singleton metadata row from the given database, if it exists.
* TODO(gsoltis): remove this method once fully ported to transactions.
*/
+ (nullable FSTPBTargetGlobal *)readTargetMetadataFromDB:(std::shared_ptr<leveldb::DB>)db;
/**
* Retrieves the global singleton metadata row using the given transaction, if it exists.
*/
+ (nullable FSTPBTargetGlobal *)readTargetMetadataWithTransaction:
(firebase::firestore::local::LevelDbTransaction *)transaction;
- (instancetype)init NS_UNAVAILABLE;
/** The garbage collector to notify about potential garbage keys. */
@property(nonatomic, weak, readwrite, nullable) id<FSTGarbageCollector> garbageCollector;
/**
* Creates a new query cache in the given LevelDB.
*
* @param db The LevelDB in which to create the cache.
*/
- (instancetype)initWithDB:(FSTLevelDB *)db
serializer:(FSTLocalSerializer *)serializer NS_DESIGNATED_INITIALIZER;
@end
NS_ASSUME_NONNULL_END