static void test_db_open(string[] words)
{
try
{
Console.WriteLine("open db");
db = new LightDB();
//打开一个数据库，打开时如果不存在会创建一个
db.Open("d:\\db001");
}
catch
{
//try
{
Console.WriteLine("create db");
db.Open("d:\\db001", new DBCreateOption()
{
MagicStr = "hello world."
});
}
//catch (Exception err)
//{
// Console.WriteLine("error:" + err.Message);
//}
}
}
static void test_db_close(string[] words)
{
try
{
Console.WriteLine("close db");
db.Close();
db = null;
}
catch (Exception err)
{
Console.WriteLine("error:" + err.Message);
}
}
static void test_db_checkpoint(string[] words)
{
//建立当前数据库的副本
db.CheckPoint("d:\\db_cp001");
//根据rocksdb的说明，这个建立副本贼鸡儿高效
//然后就从这个数据库读了，这是作为历史记录的数据库，对他只读，别去瞎几把改
var db2 = new LightDB();
db2.OpenRead("d:\\db_cp001");
var snap = db2.UseSnapShot();
var table = snap.GetTableInfo(new byte[] { 01, 02, 03 });
Console.WriteLine("db2 table=" + table.tablename);
Console.WriteLine("db2 dataheight=" + snap.DataHeight);
}
public void Init()
{
Console.CursorLeft = 0;
Console.WriteLine(" == Open DB ==");
maindb = new LightDB();
state_DBOpen = false;
string fullpath = System.IO.Path.GetFullPath(Program.config.server_storage_path);
if (System.IO.Directory.Exists(fullpath) == false)
{
System.IO.Directory.CreateDirectory(fullpath);
}
string pathDB = System.IO.Path.Combine(fullpath, "maindb");
try
{
maindb.Open(pathDB);
state_DBOpen = true;
Console.WriteLine("db opened in:" + pathDB);
}
catch (Exception err)
{
Console.WriteLine("error msg:" + err.Message);
}
if (state_DBOpen == false)
{
Console.WriteLine("open database fail. try to create it.");
try
{
DBCreateOption createop = new DBCreateOption();
createop.MagicStr = Program.config.storage_maindb_magic;
createop.FirstTask = new WriteTask();
createop.FirstTask.CreateTable(new TableInfo(tableID_Writer, "_writeraddress_", "", DBValue.Type.String));
createop.FirstTask.Put(tableID_Writer, Program.config.storage_maindb_firstwriter_address.ToBytes_UTF8Encode(), DBValue.FromValue(DBValue.Type.BOOL, true));
createop.FirstTask.CreateTable(new TableInfo(tableID_BlockID2Hash, "_block:index->hash_", "", DBValue.Type.String));
createop.FirstTask.CreateTable(new TableInfo(tableID_BlockID2Verifiy, "_block:index->hash_", "", DBValue.Type.String));
var srcdata = createop.FirstTask.ToBytes();
var hash = Helper.Sha256.ComputeHash(srcdata);
//用后处理写入hash
createop.afterparser = (_task, _data, _wb) =>
{
var keyindexzero = new byte[8];
//填充创世块hash
_wb.Put(StorageService.tableID_BlockID2Hash, keyindexzero, DBValue.FromValue(DBValue.Type.Bytes, hash));
//填充一个空字，校验数据
_wb.Put(StorageService.tableID_BlockID2Verifiy, keyindexzero, DBValue.FromValue(DBValue.Type.Bytes, new byte[1]));
};
maindb.Open(pathDB, createop);
Console.WriteLine("db created in:" + pathDB);
state_DBOpen = true;
}
catch (Exception err)
{
Console.WriteLine("error msg:" + err.Message);
}
}
}
