py4j.commands

Class CancelCommand

java.lang.Object

py4j.commands.AbstractCommand

py4j.commands.CancelCommand

All Implemented Interfaces:

Command

public class CancelCommand
extends AbstractCommand

The CancelCommand is responsible for cancelling the command on the server and shutting down the associated socket in JVM.

Field Summary

Fields inherited from class py4j.commands.AbstractCommand

commandName, connection, gateway

Constructor Summary

Constructors

Constructor and Description
CancelCommand()

Method Summary

Modifier and Type	Method and Description
void	execute(java.lang.String commandName, java.io.BufferedReader reader, java.io.BufferedWriter writer)
void	init(Gateway gateway, Py4JServerConnection connection) Called when a command instance is created and assigned to a connection.

Methods inherited from class py4j.commands.AbstractCommand

getArguments, getCommandName, getStringArguments, invokeMethod

Methods inherited from class java.lang.Object

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

Constructor Detail

CancelCommand

public CancelCommand()

Method Detail

execute

public void execute(java.lang.String commandName,
                    java.io.BufferedReader reader,
                    java.io.BufferedWriter writer)
             throws Py4JException,
                    java.io.IOException

Specified by:

execute in interface Command

Specified by:

execute in class AbstractCommand

Parameters:

commandName - The command name that was extracted of the command.

reader - The reader from which to read the command parts. Each command part are expected to be on a separate line and readable through BufferedReader.readLine().

writer - The writer to which the return value should be written.

Throws:

Py4JException - If an error occurs while executing the command. All exceptions except IOException caused by the reader and the writer should be wrapper in a Py4JException instance.

java.io.IOException - If an error occurs while using the reader or the writer.

init

public void init(Gateway gateway,
                 Py4JServerConnection connection)

Description copied from interface: Command

Called when a command instance is created and assigned to a connection.

Specified by:

init in interface Command

Overrides:

init in class AbstractCommand

connection - the Py4JServerConnection this socket is assigned to