private void removeBtn_Click(object sender, EventArgs e)
{
ClearDisplay();
Env env = new Env(EnvCreateFlags.None);
try {
Env.OpenFlags envFlags =
Env.OpenFlags.Create |
Env.OpenFlags.InitLock |
Env.OpenFlags.InitLog |
Env.OpenFlags.InitMPool |
Env.OpenFlags.InitTxn |
Env.OpenFlags.Recover;
env.Open(homeDir, envFlags, 0);
// remove existing database file
Txn txn = env.TxnBegin(null, Txn.BeginFlags.None);
env.DbRemove(txn, myDb, null, Env.WriteFlags.None);
txn.Commit(Txn.CommitMode.None);
env.Close();
// remove existing environment
env = new Env(EnvCreateFlags.None);
env.Remove(homeDir, Env.RemoveFlags.None);
}
catch (Exception ex) {
errBox.Text = ex.ToString();
tabControl.SelectTab("errorPage");
}
finally {
env.Close();
}
}
public void Delete <T>(IEnumerable <T> items) where T : class
{
dbName = typeof(T).FullName;
initDatabase();
Txn trans = env.TxnBegin(null, Txn.BeginFlags.ReadCommitted);
foreach (T t in items)
{
MemoryStream memKey = new MemoryStream();
MemoryStream memVal = new MemoryStream();
formatter.Serialize(memKey, t.GetHashCode());
formatter.Serialize(memVal, t);
DbEntry key = DbEntry.InOut(memKey.ToArray());
DeleteStatus status = dbInstance.Delete(trans, ref key);
if (status == DeleteStatus.NotFound)
{
Debug.Print("key {0} not found", t.GetHashCode());
}
}
trans.Commit(Txn.CommitMode.None);
env.Close();
}
private void viewBtn_Click(object sender, EventArgs e)
{
ClearDisplay();
// open database and read records back - the database is transactional
Env env = new Env(EnvCreateFlags.None);
try {
DbBTree btree;
Env.OpenFlags envFlags =
Env.OpenFlags.Create |
Env.OpenFlags.InitLock |
Env.OpenFlags.InitLog |
Env.OpenFlags.InitMPool |
Env.OpenFlags.InitTxn |
Env.OpenFlags.Recover;
env.Open(homeDir, envFlags, 0);
Db db = env.CreateDatabase(DbCreateFlags.None);
Txn txn = env.TxnBegin(null, Txn.BeginFlags.None);
DbFile tmpDb =
db.Open(txn, Path.Combine(homeDir, myDb), null, DbType.Unknown, Db.OpenFlags.None, 0);
txn.Commit(Txn.CommitMode.None);
if (tmpDb.DbType == DbType.BTree)
{
btree = (DbBTree)tmpDb;
}
else
{
throw new ApplicationException("Unexpected database type.");
}
List <Customer> custList = new List <Customer>();
// DbBTreeCursor implements IDisposable - will be closed through "using"
using (DbBTreeCursor cursor = btree.OpenCursor(null, DbFileCursor.CreateFlags.None)) {
Customer cust = null;
while (GetNextRecord(cursor, ref cust))
{
custList.Add(cust);
}
}
db.Close();
DataGridViewColumn nameCol = new DataGridViewTextBoxColumn();
nameCol.Name = "NameCol";
nameCol.HeaderText = "Name";
nameCol.DataPropertyName = "Name";
dataGridView.Columns.Add(nameCol);
dataGridView.DataSource = custList;
tabControl.SelectTab("dataPage");
}
catch (Exception ex) {
errBox.Text = ex.ToString();
tabControl.SelectTab("errorPage");
}
finally {
env.Close();
}
}
/// <summary>
/// Commit all the operations of a transaction into the database.
///
/// The transaction handle is freed. It and its cursors must not be used
/// again after this call, except with mdbx_cursor_renew().
/// </summary>
public void Commit()
{
if (!_released)
{
_released = true;
Txn.Commit(_txnPtr);
}
else
{
throw new InvalidOperationException("MDBX transaction handle was freed. It can't be used again unless Reset() is called");
}
}
private void btnDelete_Click(object sender, EventArgs e)
{
if (this.dgvGrid.Rows.Count == 0)
{
return;
}
if (MessageBox.Show("선택된 데이터를 삭제하시겠습니까?", "Delete", MessageBoxButtons.YesNo) == DialogResult.No)
{
return;
}
#region Transaction Decl
SqlCommand Cmd = new SqlCommand();
SqlTransaction Txn;
#endregion
#region Connection Open
Conn = new SqlConnection(ConnInfo);
Conn.Open();
#endregion
#region Transaction Init
Txn = Conn.BeginTransaction("Begin Transaction");
Cmd.Transaction = Txn;
Cmd.Connection = Conn;
#endregion
try
{
string delCustCode = dgvGrid.CurrentRow.Cells["CUSTCODE"].Value.ToString();
#region Transaction Commit
Cmd.CommandText = $"DELETE TB_CUST_NHJ WHERE CUSTCODE = '{delCustCode}'";
Cmd.ExecuteNonQuery();
Txn.Commit();
#endregion
MessageBox.Show("성공적으로 데이터를 삭제하였습니다.");
btnSearch_Click(null, null);
}
catch (Exception ex)
{
// 오류가 났을 때는 ROLLBACK
Txn.Rollback();
MessageBox.Show(ex.ToString());
}
finally
{
Conn.Close();
}
}
void initDatabase()
{
Db db = null;
Txn txn = null;
try {
env = new Env(EnvCreateFlags.None);
// configure for error and message reporting
env.ErrorStream = Console.OpenStandardError( );
env.MessageStream = Console.OpenStandardOutput( );
// initialize environment for locking, logging, memory pool and transactions
Env.OpenFlags envFlags =
Env.OpenFlags.Create |
Env.OpenFlags.InitLock |
Env.OpenFlags.InitLog |
Env.OpenFlags.InitMPool |
Env.OpenFlags.InitTxn |
Env.OpenFlags.Recover;
env.Open(dbHome, envFlags, 0);
// create, configure and open database under a transaction
txn = env.TxnBegin(null, Txn.BeginFlags.None);
db = env.CreateDatabase(DbCreateFlags.None);
// set the BTree comparison function
db.BTreeCompare = AppCompare;
// error and message reporting already configured on environment
// db.ErrorStream = errStream;
// db.ErrorPrefix = Path.GetFileName(Application.ExecutablePath);
// db.MessageStream = msgStream;
dbInstance = (DbBTree)db.Open(
txn, dbName, null, DbType.BTree, Db.OpenFlags.Create, 0);
txn.Commit(Txn.CommitMode.None);
}
catch {
}
isInited = true;
}
public void Save <T>(IEnumerable <T> items) where T : class
{
dbName = typeof(T).FullName;
initDatabase();
Txn trans = env.TxnBegin(null, Txn.BeginFlags.ReadCommitted);
foreach (T t in items)
{
MemoryStream memKey = new MemoryStream( );
MemoryStream memVal = new MemoryStream();
formatter.Serialize(memKey, t.GetHashCode());
formatter.Serialize(memVal, t);
memKey.Flush();
memVal.Flush();
DbEntry key = DbEntry.InOut(memKey.ToArray());
DbEntry value = DbEntry.InOut(memVal.ToArray());
WriteStatus status = dbInstance.PutUnique(trans, ref key, ref value);
if (status == WriteStatus.KeyExist)
{
Debug.Print("key {0} duplicated", t.GetHashCode());
}
if (status == WriteStatus.KeyExist)
{
Delete <T>(t);
WriteStatus st = dbInstance.PutUnique(trans, ref key, ref value);
}
}
trans.Commit(Txn.CommitMode.Sync);
env.Close();
}
private void btnSave_Click(object sender, EventArgs e)
{
if (dgvGrid.Rows.Count == 0)
{
return;
}
if (MessageBox.Show("선택된 데이터를 저장하시겠습니까??", "Save", MessageBoxButtons.YesNo) == DialogResult.No)
{
return;
}
#region Variable Init
string custCode = dgvGrid.CurrentRow.Cells["CUSTCODE"].Value.ToString();
string custType = dgvGrid.CurrentRow.Cells["CUSTTYPE"].Value.ToString();
string custName = dgvGrid.CurrentRow.Cells["CUSTNAME"].Value.ToString();
string bizClass = dgvGrid.CurrentRow.Cells["BIZCLASS"].Value.ToString();
string bizType = dgvGrid.CurrentRow.Cells["BIZTYPE"].Value.ToString();
string useFlag = dgvGrid.CurrentRow.Cells["USEFLAG"].Value.ToString();
string firstDate = dgvGrid.CurrentRow.Cells["FIRSTDATE"].Value.ToString();
if (custCode == "" || custType == "" || firstDate == "")
{
MessageBox.Show("'거래처 코드', '거래처 타입', '거래일자' 는 빈칸으로 남겨둘 수 없습니다.");
return;
}
if (custType == "고객사" || custType == "C")
{
custType = "C";
}
else
{
custType = "V";
}
if (useFlag == "미사용" || useFlag == "N")
{
useFlag = "N";
}
else
{
useFlag = "Y";
}
#endregion
#region Transaction Decl
SqlCommand Cmd = new SqlCommand();
SqlTransaction Txn;
#endregion
#region Connection Open
Conn = new SqlConnection(ConnInfo);
Conn.Open();
#endregion
#region Transaction Init
Txn = Conn.BeginTransaction("Test Transaction");
Cmd.Transaction = Txn;
Cmd.Connection = Conn;
#endregion
#region Transaction Commit
Cmd.CommandText = "UPDATE TB_CUST_KBM " +
$" SET CUSTNAME = '{custName}', " +
$" CUSTTYPE = '{custType}', " +
$" BIZCLASS = '{bizClass}', " +
$" BIZTYPE = '{bizType}', " +
$" USEFLAG = '{useFlag}', " +
$" FIRSTDATE = '{firstDate}', " +
$" EDITOR = '{Common.LogInId}'," +
$" EDITDATE = GETDATE() " +
$" WHERE CUSTCODE = '{custCode}' " +
" IF (@@ROWCOUNT =0) " +
" INSERT INTO TB_CUST_KBM (CUSTCODE, CUSTTYPE, CUSTNAME, BIZCLASS, BIZTYPE, USEFLAG, FIRSTDATE, MAKEDATE, MAKER) " +
$"VALUES ( '{custCode}', '{custType}', '{custName}', '{bizClass}', '{bizType}', '{useFlag}', '{firstDate}', GETDATE(), '{Common.LogInId}')";
Cmd.ExecuteNonQuery();
Txn.Commit();
#endregion
MessageBox.Show("성공적으로 저장하였습니다.");
Conn.Close();
}
public IList <T> Lookup <T>(ICondition condition) where T : class
{
dbName = typeof(T).FullName;
initDatabase();
List <T> result = new List <T>( );
Txn trans = env.TxnBegin(null, Txn.BeginFlags.None);
switch (condition.Name)
{
case "SELECT_ALL":
using (DbBTreeCursor cursor = dbInstance.OpenCursor(null, DbFileCursor.CreateFlags.None)) {
T cust = null;
IEnumerable <KeyDataPair> lst = cursor.ItemsForward(false, DbFileCursor.ReadFlags.None);
foreach (KeyDataPair pair in lst)
{
using (MemoryStream mem = new MemoryStream(pair.Data.Buffer)) {
T t = (T)formatter.Deserialize(mem);
result.Add(t);
}
}
}
break;
case "SELECT_BY_CODE":
SelectByCodeCondition cond = condition as SelectByCodeCondition;
if (cond == null)
{
throw new InvalidDataException(String.Format("Invalid {0} condition", condition.Name));
}
foreach (int i in cond.HashCodes)
{
T t = null;
byte[] buf = new byte[1024];
MemoryStream key = new MemoryStream( );
MemoryStream value = new MemoryStream();
formatter.Serialize(key, i);
DbEntry dbKey = DbEntry.InOut(key.ToArray());
DbEntry dbVal = DbEntry.Out(buf);
while (true)
{
ReadStatus status =
dbInstance.GetExact(trans, ref dbKey, ref dbVal, DbFile.ReadFlags.None);
switch (status)
{
case ReadStatus.BufferSmall:
if (dbVal.Buffer.Length < dbVal.Size)
{
value.SetLength(dbVal.Size);
dbVal = DbEntry.Out(value.GetBuffer());
}
continue;
case ReadStatus.KeyEmpty:
goto brk;
case ReadStatus.NotFound:
goto brk;
case ReadStatus.Success:
value.Position = 0;
value.SetLength(dbVal.Size);
value.Write(dbVal.Buffer, 0, dbVal.Size);
value.Flush();
value.Seek(0, SeekOrigin.Begin);
t = (T)formatter.Deserialize(value);
result.Add(t);
key.Dispose();
value.Dispose();
break;
}
}
brk :;
}
break;
default:
throw new NotImplementedException(String.Format("Condition {0} is not implemented", condition.Name));
}
trans.Commit(Txn.CommitMode.Sync);
env.Close();
return(result);
}
private void loadBtn_Click(object sender, EventArgs e)
{
ClearDisplay();
MemoryStream errStream = new MemoryStream();
MemoryStream msgStream = new MemoryStream();
TextWriter errWriter = new StreamWriter(errStream);
TextWriter msgWriter = new StreamWriter(msgStream);
Db db = null;
Txn txn = null;
Env env = null;
try {
env = new Env(EnvCreateFlags.None);
// configure for error and message reporting
env.ErrorStream = errStream;
env.ErrorPrefix = Path.GetFileName(Application.ExecutablePath);
env.MessageStream = msgStream;
// initialize environment for locking, logging, memory pool and transactions
Env.OpenFlags envFlags =
Env.OpenFlags.Create |
Env.OpenFlags.InitLock |
Env.OpenFlags.InitLog |
Env.OpenFlags.InitMPool |
Env.OpenFlags.InitTxn |
Env.OpenFlags.Recover;
env.Open(homeDir, envFlags, 0);
// create, configure and open database under a transaction
txn = env.TxnBegin(null, Txn.BeginFlags.None);
db = env.CreateDatabase(DbCreateFlags.None);
// set the BTree comparison function
db.BTreeCompare = AppCompare;
// error and message reporting already configured on environment
// db.ErrorStream = errStream;
// db.ErrorPrefix = Path.GetFileName(Application.ExecutablePath);
// db.MessageStream = msgStream;
DbBTree btree = (DbBTree)db.Open(
txn, myDb, null, DbType.BTree, Db.OpenFlags.Create, 0);
txn.Commit(Txn.CommitMode.None);
// create a sequence named '###sequence1' under a transaction
txn = env.TxnBegin(null, Txn.BeginFlags.None);
Sequence seq = btree.CreateSequence();
byte[] seqName = utf8.GetBytes("###sequence1");
DbEntry seqNameEntry = DbEntry.InOut(seqName);
seq.Open(txn, ref seqNameEntry, Sequence.OpenFlags.Create);
seq.Close();
txn.Commit(Txn.CommitMode.None);
// open sequence again, retrieve values and then remove the sequence
seq = btree.CreateSequence();
txn = env.TxnBegin(null, Txn.BeginFlags.None);
// seq.CacheSize = 1000; // cannot use transactions when CacheSize > 0
seq.Open(txn, ref seqNameEntry, Sequence.OpenFlags.None);
Int64 seqVal;
for (int indx = 0; indx < 500; indx++)
{
seqVal = seq.Get(txn, 1, Sequence.ReadFlags.None);
}
seq.Remove(txn, Sequence.RemoveFlags.None);
txn.Commit(Txn.CommitMode.None);
// add a few records under a transaction
Customer cust;
txn = env.TxnBegin(null, Txn.BeginFlags.None);
cust = new Customer("John Doe", "122 Yonge Street", "Toronto", "ON", "M5R 5T9", DateTime.Parse("Dec 22, 1965"));
AddRecord(btree, txn, cust, errWriter);
cust = new Customer("Jane Doby", "23 Bloor Street", "Oshawa", "ON", "L1H 2K9", DateTime.Parse("Jun 1, 1962"));
AddRecord(btree, txn, cust, errWriter);
cust = new Customer("Rusty Nail", "77 Bond Street", "Markham", "ON", "L3T 7Y8", DateTime.Parse("Sep 9, 1915"));
AddRecord(btree, txn, cust, errWriter);
cust = new Customer("Rosy Cheek", "11 Adelaide Street", "Whitby", "ON", "K3P 4H4", DateTime.Parse("Jan 2, 1980"));
AddRecord(btree, txn, cust, errWriter);
// this last one is a duplicate of the first record
cust = new Customer("John Doe", "1459 King Street", "Toronto", "ON", "N8N 2L0", DateTime.Parse("Apr 14, 1973"));
AddRecord(btree, txn, cust, errWriter);
txn.Commit(Txn.CommitMode.None);
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine("K E Y S T A T I S T I C S");
msgWriter.WriteLine("==================================================");
// get a key range, under a transaction
txn = env.TxnBegin(null, Txn.BeginFlags.None);
keyStream.Position = 0;
formatter.Serialize(keyStream, "John Doe");
DbEntry key = DbEntry.InOut(keyStream.GetBuffer(), 0, (int)keyStream.Position);
DbBTree.KeyRange keyRange = btree.GetKeyRange(txn, ref key);
txn.Commit(Txn.CommitMode.None);
msgWriter.WriteLine();
string msg = "KeyRange for 'John Doe': Less = {0}, Equal = {1}, Greater = {2}";
msgWriter.WriteLine(string.Format(msg, keyRange.Less, keyRange.Equal, keyRange.Greater));
msgWriter.WriteLine();
// retrieve some database statistics
TxnStats stats = env.GetTxnStats(StatFlags.None);
DbBTree.Stats btstats = btree.GetStats(null, DbFile.StatFlags.None);
CacheFileStats[] cfStats = env.GetCacheFileStats(StatFlags.None);
// we can also have them written to the message stream
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine("T R A N S A C T I O N S T A T I S T I C S");
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine();
msgWriter.Flush();
env.PrintTxnStats(StatPrintFlags.None);
msgWriter.WriteLine();
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine("L O G S T A T I S T I C S");
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine();
msgWriter.Flush();
env.PrintLogStats(StatPrintFlags.All);
msgWriter.WriteLine();
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine("L O C K S T A T I S T I C S");
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine();
msgWriter.Flush();
env.PrintLogStats(StatPrintFlags.All);
msgWriter.WriteLine();
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine("C A C H E S T A T I S T I C S");
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine();
msgWriter.Flush();
env.PrintCacheStats(CacheStatPrintFlags.All);
msgWriter.WriteLine();
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine("B T R E E S T A T I S T I C S");
msgWriter.WriteLine("==================================================");
msgWriter.WriteLine();
msgWriter.Flush();
btree.PrintStats(DbFile.StatPrintFlags.All);
}
catch (BdbException) {
if (txn != null && !txn.IsDisposed)
{
txn.Abort();
}
// errors are reported through error stream already
return;
}
catch (Exception ex) {
if (txn != null && !txn.IsDisposed)
{
txn.Abort();
}
errWriter.WriteLine(ex.ToString());
return;
}
finally {
if (db != null)
{
db.Close();
}
if (env != null)
{
env.Close();
}
msgWriter.Flush();
string msgText = utf8.GetString(msgStream.GetBuffer());
if (msgText != "")
{
msgBox.Text = msgText;
}
msgWriter.Close();
errWriter.Flush();
string errText = utf8.GetString(errStream.GetBuffer());
if (errText != "")
{
errBox.Text = errText;
tabControl.SelectTab("errorPage");
}
errWriter.Close();
}
}
