public UpdateRowRequest(RowUpdateChange rowUpdateChange)
{
this.RowUpdateChange = rowUpdateChange;
this.TableName = rowUpdateChange.TableName;
this.Condition = rowUpdateChange.Condition;
this.PrimaryKey = rowUpdateChange.PrimaryKey;
}
/// <summary>
/// 更新行的时候，指定某一列为原子自增列，并对这一列进行原子自增
/// </summary>
public static void Increment(int incrementValue)
{
Console.WriteLine("Start set increment column...");
OTSClient otsClient = Config.GetClient();
// 定义行的主键，必须与创建表时的TableMeta中定义的一致
PrimaryKey primaryKey = new PrimaryKey
{
{ Pk1, new ColumnValue(0) },
{ Pk2, new ColumnValue("abc") }
};
RowUpdateChange rowUpdateChange = new RowUpdateChange(TableName, primaryKey);
rowUpdateChange.ReturnType = ReturnType.RT_AFTER_MODIFY;
rowUpdateChange.ReturnColumnNames = new List <string>()
{
IncrementCol
};
//设置一个原子自增列，这一列从0开始自增，每次增增加1。
rowUpdateChange.Increment(new Column(IncrementCol, new ColumnValue(incrementValue)));
UpdateRowRequest updateRowRequest = new UpdateRowRequest(rowUpdateChange);
var response = otsClient.UpdateRow(updateRowRequest);
Console.WriteLine("set Increment column succeed，Increment result:" + response.Row.GetColumns()[0].Value);
}
public static byte[] BuildRowUpdateChangeWithHeader(RowUpdateChange rowChange)
{
List <PlainBufferCell> pkCells = new List <PlainBufferCell>();
foreach (var column in rowChange.GetPrimaryKey().GetPrimaryKeyColumns())
{
pkCells.Add(PlainBufferConversion.ToPlainBufferCell(column));
}
List <PlainBufferCell> cells = new List <PlainBufferCell>();
if (rowChange.GetColumnsToUpdate().Count > 0)
{
foreach (Tuple <Column, RowChangeType> column in rowChange.GetColumnsToUpdate())
{
switch (column.Item2)
{
case RowChangeType.PUT:
cells.Add(PlainBufferConversion.ToPlainBufferCell(column.Item1, false, false, false, (byte)0x0));
break;
case RowChangeType.DELETE:
cells.Add(PlainBufferConversion.ToPlainBufferCell(column.Item1, true, false, true, PlainBufferConsts.DELETE_ONE_VERSION));
break;
case RowChangeType.DELETE_ALL:
cells.Add(PlainBufferConversion.ToPlainBufferCell(column.Item1, true, true, true, PlainBufferConsts.DELETE_ALL_VERSION));
break;
case RowChangeType.INCREMENT:
cells.Add(PlainBufferConversion.ToPlainBufferCell(column.Item1, false, true, true, PlainBufferConsts.INCREMENT));
break;
}
}
}
PlainBufferRow row = new PlainBufferRow(pkCells, cells, false);
int size = ComputePlainBufferRowWithHeader(row);
PlainBufferOutputStream output = new PlainBufferOutputStream(size);
PlainBufferCodedOutputStream codedOutput = new PlainBufferCodedOutputStream(output);
codedOutput.WriteRowWithHeader(row);
if (!output.IsFull())
{
throw new IOException("Bug: serialize row update change failed.");
}
return(output.GetBuffer());
}
public UpdateRowRequest(string tableName, Condition condition, PrimaryKey primaryKey,
UpdateOfAttribute updateOfAttribute)
{
TableName = tableName;
Condition = condition;
PrimaryKey = primaryKey;
UpdateOfAttribute = updateOfAttribute;
RowUpdateChange = new RowUpdateChange(tableName, primaryKey)
{
Condition = condition
};
RowUpdateChange.FromUpdateOfAtrribute(updateOfAttribute);
}