Package it.tidalwave.util

Interface ProcessExecutor

All Known Implementing Classes:

DefaultProcessExecutor

@ThreadSafe
public interface ProcessExecutor

A facility that provides means for launching an external process, scraping its stdout and stderr in real-time and sending commands by means of its stdin.

Since:

1.39

Version:

$Id$

Author:

Fabrizio Giudici

See Also:

DefaultProcessExecutor

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	ProcessExecutor.ConsoleOutput	This interface provides operations that can be performed on the stdout or stderr consoles attached to the external process.

Method Summary

Modifier and Type	Method	Description
ProcessExecutor.ConsoleOutput	getStderr()	Returns the stderr console.
ProcessExecutor.ConsoleOutput	getStdout()	Returns the stdout console.
ProcessExecutor	send(String string)	Sends a string to the stdin of the running process.
ProcessExecutor	start()	Starts the external process.
void	stop()	Stops the external process.
ProcessExecutor	waitForCompletion()	Waits for the termination of the external process.
ProcessExecutor	withArgument(String argument)	Adds a single argument to pass to the external process.
ProcessExecutor	withArguments(String... arguments)	Adds some arguments to pass to the external process.

Method Detail

withArguments

@Nonnull
ProcessExecutor withArguments(@Nonnull
                              String... arguments)

Adds some arguments to pass to the external process.

Parameters:

arguments - the arguments

Returns:

itself for chaining methods

withArgument

@Nonnull
ProcessExecutor withArgument(@Nonnull
                             String argument)

Adds a single argument to pass to the external process.

Parameters:

argument - the argument

Returns:

itself for chaining methods

start

@Nonnull
ProcessExecutor start()
               throws IOException

Starts the external process.

Returns:

itself for chaining methods

Throws:

IOException - in case of error

stop

void stop()

Stops the external process.

waitForCompletion

@Nonnull
ProcessExecutor waitForCompletion()
                           throws IOException,
                                  InterruptedException

Waits for the termination of the external process.

Returns:

itself for chaining methods

Throws:

InterruptedException - if the wait has been interrupted

IOException - in case of I/O error

send

@Nonnull
ProcessExecutor send(@Nonnull
                     String string)
              throws IOException

Sends a string to the stdin of the running process. If a carriage return is needed, it must be explicitly placed in the string.

Parameters:

string - the string to send

Returns:

itself for chaining methods

Throws:

IOException - in case of I/O error

getStdout

@Nonnull
ProcessExecutor.ConsoleOutput getStdout()

Returns the stdout console.

Returns:

the console

getStderr

@Nonnull
ProcessExecutor.ConsoleOutput getStderr()

Returns the stderr console.

Returns:

the console