Module org.elasticsearch.cli

Package org.elasticsearch.cli

Class Command

java.lang.Object

org.elasticsearch.cli.Command

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

MultiCommand

public abstract class Command
extends Object
implements Closeable

An action to execute within a cli.

Field Summary

Fields

Modifier and Type	Field	Description
protected final String	description	A description of the command, used in the help output.
protected final joptsimple.OptionParser	parser	The option parser for this command.

Constructor Summary

Constructors

Constructor	Description
Command(String description)	Construct the command with the specified command description and runnable to execute before main is invoked.

Method Summary

Modifier and Type	Method	Description
void	close()
protected abstract void	execute(Terminal terminal, joptsimple.OptionSet options, ProcessInfo processInfo)	Executes this command.
protected static void	exit(int status)
final int	main(String[] args, Terminal terminal, ProcessInfo processInfo)	Parses options for this command from args and executes it.
protected void	mainWithoutErrorHandling(String[] args, Terminal terminal, ProcessInfo processInfo)	Executes the command, but all errors are thrown.
joptsimple.OptionSet	parseOptions(String[] args)	Parse command line arguments for this command.
protected void	printAdditionalHelp(Terminal terminal)	Prints additional help information, specific to the command
protected void	printUserException(Terminal terminal, UserException e)

Methods inherited from class java.lang.Object

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

Field Details

description

protected final String description

A description of the command, used in the help output.

parser

protected final joptsimple.OptionParser parser

The option parser for this command.

Constructor Details

Command

public Command(String description)

Construct the command with the specified command description and runnable to execute before main is invoked.

Parameters:

description - the command description

Method Details

main

public final int main(String[] args,
 Terminal terminal,
 ProcessInfo processInfo)
               throws IOException

Parses options for this command from args and executes it.

Throws:

IOException

mainWithoutErrorHandling

protected void mainWithoutErrorHandling(String[] args,
 Terminal terminal,
 ProcessInfo processInfo)
                                 throws Exception

Executes the command, but all errors are thrown.

Throws:

Exception

parseOptions

public joptsimple.OptionSet parseOptions(String[] args)

Parse command line arguments for this command.

Parameters:

args - The string arguments passed to the command

Returns:

A set of parsed options

printAdditionalHelp

protected void printAdditionalHelp(Terminal terminal)

Prints additional help information, specific to the command

printUserException

protected void printUserException(Terminal terminal,
 UserException e)

exit

protected static void exit(int status)

execute

protected abstract void execute(Terminal terminal,
 joptsimple.OptionSet options,
 ProcessInfo processInfo)
                         throws Exception

Executes this command. Any runtime user errors (like an input file that does not exist), should throw a UserException.

Throws:

Exception

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException