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3cacd4b4ec
Summary: The definition of the Cache class should not be needed by the vast majority of RocksDB users, so I think it is just distracting to include it in cache.h, which is primarily needed for configuring and creating caches. This change moves the class to a new header advanced_cache.h. It is just cut-and-paste except for modifying the class API comment. In general, operations on shared_ptr<Cache> should continue to work when only a forward declaration of Cache is available, as long as all the Cache instances provided are already shared_ptr. See https://stackoverflow.com/a/17650101/454544 Also, the most common way to customize a Cache is by wrapping an existing implementation, so it makes sense to provide CacheWrapper in the public API. This was a cut-and-paste job except removing the implementation of Name() so that derived classes must provide it. Intended follow-up: consolidate Release() into one function to reduce customization bugs / confusion Pull Request resolved: https://github.com/facebook/rocksdb/pull/11192 Test Plan: `make check` Reviewed By: anand1976 Differential Revision: D43055487 Pulled By: pdillinger fbshipit-source-id: 7b05492df35e0f30b581b4c24c579bc275b6d110
58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "rocksdb/utilities/leveldb_options.h"
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#include "rocksdb/advanced_cache.h"
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#include "rocksdb/comparator.h"
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#include "rocksdb/env.h"
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#include "rocksdb/filter_policy.h"
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#include "rocksdb/options.h"
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#include "rocksdb/table.h"
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namespace ROCKSDB_NAMESPACE {
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LevelDBOptions::LevelDBOptions()
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: comparator(BytewiseComparator()),
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create_if_missing(false),
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error_if_exists(false),
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paranoid_checks(false),
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env(Env::Default()),
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info_log(nullptr),
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write_buffer_size(4 << 20),
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max_open_files(1000),
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block_cache(nullptr),
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block_size(4096),
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block_restart_interval(16),
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compression(kSnappyCompression),
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filter_policy(nullptr) {}
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Options ConvertOptions(const LevelDBOptions& leveldb_options) {
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Options options = Options();
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options.create_if_missing = leveldb_options.create_if_missing;
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options.error_if_exists = leveldb_options.error_if_exists;
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options.paranoid_checks = leveldb_options.paranoid_checks;
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options.env = leveldb_options.env;
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options.info_log.reset(leveldb_options.info_log);
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options.write_buffer_size = leveldb_options.write_buffer_size;
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options.max_open_files = leveldb_options.max_open_files;
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options.compression = leveldb_options.compression;
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BlockBasedTableOptions table_options;
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table_options.block_cache.reset(leveldb_options.block_cache);
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table_options.block_size = leveldb_options.block_size;
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table_options.block_restart_interval = leveldb_options.block_restart_interval;
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table_options.filter_policy.reset(leveldb_options.filter_policy);
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options.table_factory.reset(NewBlockBasedTableFactory(table_options));
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return options;
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}
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} // namespace ROCKSDB_NAMESPACE
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