org.apache.samza.sql.client.impl

Class CliCommandHandler

java.lang.Object

org.apache.samza.sql.client.impl.CliCommandHandler

All Implemented Interfaces:

CommandHandler

public class CliCommandHandler
extends java.lang.Object
implements CommandHandler

Default CommandHandler which handles basic commands of type CliCommandType

Constructor Summary

Constructors

Constructor and Description
CliCommandHandler()

Method Summary

Modifier and Type	Method and Description
boolean	handleCommand(CliCommand command) Handles the given command
void	init(CliShell shell, CliEnvironment env, org.jline.terminal.Terminal terminal, ExecutionContext exeContext) sets up the member variables
CliCommand	parseLine(java.lang.String line) Attempts to parse the given input string line into a CliCommand of this handler's CommandType
void	printHelpMessage() Prints to terminal the help message of the commands this handler handles

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CliCommandHandler

public CliCommandHandler()

Method Detail

init

public void init(CliShell shell,
                 CliEnvironment env,
                 org.jline.terminal.Terminal terminal,
                 ExecutionContext exeContext)

sets up the member variables

Specified by:

init in interface CommandHandler

Parameters:

shell: - the CliShell which uses this CommandHandler

env: - the Shell's CliEnvironment

terminal: - the Terminal to print output and messages

exeContext: - the ExecutionContext

parseLine

public CliCommand parseLine(java.lang.String line)

Attempts to parse the given input string line into a CliCommand of this handler's CommandType

Specified by:

parseLine in interface CommandHandler

Parameters:

line: - input line string

Returns:

CliCommand on success, null otherwise

printHelpMessage

public void printHelpMessage()

Prints to terminal the help message of the commands this handler handles

Specified by:

printHelpMessage in interface CommandHandler

handleCommand

public boolean handleCommand(CliCommand command)
                      throws CommandHandlerException

Handles the given command

Specified by:

handleCommand in interface CommandHandler

Parameters:

command: - input CliCommand to handle

Returns:

false if command is to quit, or fatal error happened that Shell should not continue running. True o.w.

Throws:

CommandHandlerException - if unrecoverable error happened while handling the input CliCommand