kythe.io@v0.0.68-0.20240422202219-7225dbc01741/kythe/cxx/common/indexing/MemcachedHashCache.h (about)

     1  /*
     2   * Copyright 2019 The Kythe Authors. All rights reserved.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *   http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  #ifndef KYTHE_CXX_COMMON_INDEXING_MEMCACHEDHASHCACHE_H_
    18  #define KYTHE_CXX_COMMON_INDEXING_MEMCACHEDHASHCACHE_H_
    19  
    20  #include <string>
    21  
    22  #include "kythe/cxx/common/indexing/KytheCachingOutput.h"
    23  
    24  extern "C" {
    25  struct memcached_st;
    26  }
    27  
    28  namespace kythe {
    29  
    30  /// \brief A `HashCache` that uses a memcached server.
    31  class MemcachedHashCache : public HashCache {
    32   public:
    33    ~MemcachedHashCache() override;
    34  
    35    /// \brief Use a memcached instance (e.g. "--SERVER=foo:1234")
    36    bool OpenMemcache(const std::string& spec);
    37  
    38    void RegisterHash(const Hash& hash) override;
    39  
    40    bool SawHash(const Hash& hash) override;
    41  
    42   private:
    43    ::memcached_st* cache_ = nullptr;
    44  };
    45  
    46  }  // namespace kythe
    47  #endif  // KYTHE_CXX_COMMON_INDEXING_MEMCACHEDHASHCACHE_H_