relshell API Reference

ShellOperator

synopsis:Provides ways to instantiate shell commands which input/output batches of typed data.

• ShellOperator - One-time shell command’s instantiater. Shell command’s process is run/killed per 1 batch processing.
• DaemonShellOperator - Daemonized shell command’s instantiater. Shell command’s process is daemonized and repeatedly inputs multiple batches.

Input/Output Data Structure

synopsis:ShellOperator’s input/output data structure.

• Batch - Unit of ShellOperator‘s input/output, composed of set of Record‘s.
• Record - Unit of information, composed of columns. Each column is typed (like RDBMS).

Data Type

synopsis:Data types for Record.

• RecordDef - a
• ColumnDef - a