// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you 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.

#include "util/obj_lru_cache.h"

namespace doris {

ObjLRUCache::ObjLRUCache(int64_t capacity, uint32_t num_shards)

        : LRUCachePolicy(CachePolicy::CacheType::COMMON_OBJ_LRU_CACHE, capacity,

                         LRUCacheType::NUMBER, config::common_obj_lru_cache_stale_sweep_time_sec,

                         /*num shards*/ 32, /*element count capacity */ 0,

                         /*enable prune*/ true, /*is lru-k*/ true),

          _enabled(capacity > 0) {}

bool ObjLRUCache::lookup(const ObjKey& key, CacheHandle* handle) {

    if (!_enabled) {

        return false;

    }

    auto* lru_handle = LRUCachePolicy::lookup(key.key);

    if (!lru_handle) {

        // cache miss

        return false;

    }

    *handle = CacheHandle(this, lru_handle);

    return true;

}

void ObjLRUCache::erase(const ObjKey& key) {

    if (_enabled) {

        LRUCachePolicy::erase(key.key);

    }

}

bool ObjLRUCache::exceed_prune_limit() {

    // just return true to prune all cached obj.

    // Because ObjLRUCache is counted with number, not memory.

    // Simple prune all

    return true;

}

} // namespace doris