levelDB_se_index/test/WAL_test.cc

#include "leveldb/db.h"
#include "leveldb/env.h"  // 添加对 Env 类的完整定义
#include <iostream>

using namespace std;
using namespace leveldb;

int main() {
    DB* db = nullptr;
    Options op;
    op.create_if_missing = true;

     // 创建日志文件并将其关联到 Options 的 info_log
    Logger* logger;
    Status log_status = Env::Default()->NewLogger("leveldb_log.txt", &logger);
    if (log_status.ok()) {
        op.info_log = logger;  // 正确设置 Logger 指针
    } else {
        cerr << "Failed to create logger: " << log_status.ToString() << endl;
    }

    Status status = DB::Open(op, "testWAL", &db);
    assert(status.ok());
    db->Put(WriteOptions(), "001", "leveldb");
    string s;
    db->Get(ReadOptions(), "001", &s);
    cout<<s<<endl;

    db->Put(WriteOptions(), "002", "world");
    string s1;
    db->Delete(WriteOptions(), "002");
    db->Get(ReadOptions(), "002", &s1);
    cout<<s1<<endl;

    delete db;
    return 0;
}