org.apache.hadoop.maven.plugin.util

Class Exec

java.lang.Object

org.apache.hadoop.maven.plugin.util.Exec

public class Exec
extends Object

Exec is a helper class for executing an external process from a mojo.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Exec.OutputBufferThread OutputBufferThread is a background thread for consuming and storing output of the external process.

Constructor Summary

Constructors

Constructor and Description
Exec(org.apache.maven.plugin.Mojo mojo) Creates a new Exec instance for executing an external process from the given mojo.

Method Summary

Modifier and Type	Method and Description
static void	addEnvironment(ProcessBuilder pb, Map<String,String> env) Add environment variables to a ProcessBuilder.
static String	envToString(Map<String,String> env) Pretty-print the environment to a StringBuilder.
int	run(List<String> command, List<String> output) Runs the specified command and saves each line of the command's output to the given list.
int	run(List<String> command, List<String> output, List<String> errors) Runs the specified command and saves each line of the command's output to the given list and each line of the command's stderr to the other list.

Methods inherited from class java.lang.Object

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

Constructor Detail

Exec

public Exec(org.apache.maven.plugin.Mojo mojo)

Creates a new Exec instance for executing an external process from the given mojo.

Parameters:

mojo - Mojo executing external process

Method Detail

run

public int run(List<String> command,
               List<String> output)

Runs the specified command and saves each line of the command's output to the given list.

Parameters:

command - List containing command and all arguments

output - List in/out parameter to receive command output

Returns:

int exit code of command

run

public int run(List<String> command,
               List<String> output,
               List<String> errors)

Runs the specified command and saves each line of the command's output to the given list and each line of the command's stderr to the other list.

Parameters:

command - List containing command and all arguments

output - List in/out parameter to receive command output

errors - List in/out parameter to receive command stderr

Returns:

int exit code of command

addEnvironment

public static void addEnvironment(ProcessBuilder pb,
                                  Map<String,String> env)

Add environment variables to a ProcessBuilder.

Parameters:

pb - The ProcessBuilder

env - A map of environment variable names to values.

envToString

public static String envToString(Map<String,String> env)

Pretty-print the environment to a StringBuilder.

Parameters:

env - A map of environment variable names to values to print.

Returns:

The pretty-printed string.