2c8fdb6134
This commit make segment V1 and V2 share on same file cache, so that segment V2's file descriptors stored in cache can be cleaned up as V1 do.
64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "util/file_cache.h"
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#include "gutil/strings/substitute.h"
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#include "env/env.h"
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namespace doris {
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template <class FileType>
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FileCache<FileType>::FileCache(const std::string& cache_name, int max_open_files) :
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_cache_name(cache_name),
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_cache(new_lru_cache(max_open_files)),
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_is_cache_own(true) { }
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template <class FileType>
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FileCache<FileType>::FileCache(const std::string& cache_name, std::shared_ptr<Cache> cache) :
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_cache_name(cache_name),
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_cache(cache),
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_is_cache_own(false) { }
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template <class FileType>
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bool FileCache<FileType>::lookup(const std::string& file_name, OpenedFileHandle<FileType>* file_handle) {
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DCHECK(_cache != nullptr);
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CacheKey key(file_name);
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auto lru_handle = _cache->lookup(key);
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if (lru_handle == nullptr) {
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return false;
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}
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*file_handle = OpenedFileHandle<FileType>(_cache.get(), lru_handle);
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return true;
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}
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template <class FileType>
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void FileCache<FileType>::insert(const std::string& file_name, FileType* file, OpenedFileHandle<FileType>* file_handle) {
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DCHECK(_cache != nullptr);
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auto deleter = [](const CacheKey& key, void* value) {
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delete (FileType*)value;
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};
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CacheKey key(file_name);
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auto lru_handle = _cache->insert(key, file, 1, deleter);
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*file_handle = OpenedFileHandle<FileType>(_cache.get(), lru_handle);
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}
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// Explicit specialization for callers outside this compilation unit.
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template class FileCache<RandomAccessFile>;
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} // namespace doris
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