com.pervasive.datarush.operators.io.vectorwise

Interface CommandRunner

All Known Implementing Classes:

LocalCommandRunner, RemoteCommandRunner

public interface CommandRunner

Interface defining methods used to run an executable outside of the JVM.

Method Summary

Modifier and Type	Method and Description
void	dispose() Clean up any resources that were acquired to execute shell commands.
void	initialize() Initialization required before executing a command.
int	runCommand(List<String> args, InputStream stdIn, OutputStream stdOut, OutputStream stdErr) Run the specified command.

Method Detail

initialize

void initialize()
         throws IOException

Initialization required before executing a command.

Throws:

IOException - thrown if any errors occur

runCommand

int runCommand(List<String> args,
               InputStream stdIn,
               OutputStream stdOut,
               OutputStream stdErr)
        throws IOException

Run the specified command. The given input stream is passed to the command as it's standard input. The standard output and standard error are captured in the given output streams. The exit code of the command as passed by the execution shell is returned.

Parameters:

args - list of arguments for the command line execution

stdIn - input stream used as standard in

stdOut - output stream that captures standard out

stdErr - output stream that captures standard err

Returns:

exit code of the shell command

Throws:

IOException - thrown if any errors occur

dispose

void dispose()
      throws IOException

Clean up any resources that were acquired to execute shell commands. This method should always be called even if any errors occur running shell commands.

Throws:

IOException - thrown if any errors occur