1
我已經做了散裝裝載機key_validation_class = LexicalUUIDType新行本code的幫助,但我已經改變了行鍵我key_validation_class = AsciiType或key_validation_class = UTF8Type在爲了使字符串作爲行鍵批量加載在卡桑德拉:String作爲在卡桑德拉
create column family Users1
with key_validation_class=AsciiType
and comparator=AsciiType
AND column_metadata = [
{column_name: timestamp1, validation_class: AsciiType}
{column_name: symbol, validation_class: AsciiType}
{column_name: Bid_Price, validation_class:AsciiType}
{column_name: Ask_Price, validation_class:AsciiType}
];
我曾嘗試以使行鍵爲字符串類型,但收到錯誤或代碼中所有可能發生的變化,即使沒有usersWriter.newRow沒有ABL E要寫入的SSTable
while ((line = reader.readLine()) != null)
{
if (entry.parse(line, lineNumber))
{
//usersWriter.newRow(uuid);
usersWriter.newRow(String.valueOf(lineNumber));
usersWriter.addColumn(bytes("symbol"), bytes(entry.symbol), timestamp);
usersWriter.addColumn(bytes("timestamp1"), bytes(entry.timestamp1), timestamp);
usersWriter.addColumn(bytes("Bid_Price"), bytes(entry.Bid_Price), timestamp);
usersWriter.addColumn(bytes("Ask_Price"), bytes(entry.Ask_Price), timestamp);
}
lineNumber++;
}
得到一個錯誤,因爲預期它只能採取字節緩衝區
usersWriter.newRow(String.valueOf(lineNumber));
^
required: ByteBuffer
found: String
reason: actual argument String cannot be converted to ByteBuffer by method invocation conversion
任何幫助,使字符串作爲行鍵中的SSTable對上述列族definition.thanks。