ReadableDataSource automatically fetches the backend data.source to the target type.S to target type T.ReadableDataSource based on nothing.ReadableDataSource based on file.ReadableDataSource whose read buffer size is
1MB, charset is UTF8, and read interval is 3 seconds.WritableDataSource based on file.SentinelProperty of the data source.value to the data source.Copyright © 2019 Alibaba Group. All rights reserved.