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59 lines
2.0 KiB
59 lines
2.0 KiB
#include "db/db_impl.h"
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#include <deque>
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#include <map>
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#include <set>
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#include <string>
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#include "leveldb/db.h"
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#include "leveldb/options.h"
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#include "leveldb/slice.h"
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#include "leveldb/status.h"
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#include "port/port_stdcxx.h"
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#include "fielddb/request.h"
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namespace fielddb {
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using namespace leveldb;
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class FieldDB : leveldb::DB {
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public:
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FieldDB() = default;
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FieldDB(const Options& options,const std::string& name);
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/*lab1的要求*/
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Status Put(const WriteOptions &options, const Slice &key, const Slice &value) override;
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Status PutFields(const WriteOptions &, const Slice &key, const FieldArray &fields) override;
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Status Delete(const WriteOptions &options, const Slice &key) override;
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Status Write(const WriteOptions &options, WriteBatch *updates) override;
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Status Get(const ReadOptions &options, const Slice &key, std::string *value) override;
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Status GetFields(const ReadOptions &options, const Slice &key, FieldArray *fields) override;
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std::vector<std::string> FindKeysByField(Field &field) override;
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Iterator * NewIterator(const ReadOptions &options) override;
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const Snapshot * GetSnapshot() override;
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void ReleaseSnapshot(const Snapshot *snapshot) override;
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bool GetProperty(const Slice &property, std::string *value) override;
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void GetApproximateSizes(const Range *range, int n, uint64_t *sizes) override;
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void CompactRange(const Slice *begin, const Slice *end) override;
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/*与索引相关*/
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bool CreateIndexOnField(const std::string& field_name);
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bool DeleteIndex(std::string &field_name);
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std::vector<std::string> QueryByIndex(Field &field);
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static Status OpenFieldDB(const Options& options,const std::string& name,DB** dbptr);
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private:
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//根据metaDB的内容进行恢复
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Status Recover();
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private:
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leveldb::DB *metaDB;
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leveldb::DB *indexDB;
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leveldb::DB *kvDB;
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enum IndexStatus{
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Creating,
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Deleting,
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Exist
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};
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std::map<std::string,int> index;
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port::Mutex _mutex; // mutex for taskqueue
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std::deque<Request *> taskqueue;
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};
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} // end of namespace
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