uk.ac.starlink.task

Class InvokeUtils

java.lang.Object

uk.ac.starlink.task.InvokeUtils

public class InvokeUtils
extends Object

Provides some utility functions used by classes which invoke tasks.

Since:

23 Jan 2007

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
InvokeUtils()

Method Summary

Modifier and Type	Method and Description
static void	configureLogging(int verbosity, boolean debug) Sets up the logging system.
static String	getJavaVersion() Returns the JVM version, without throwing any exceptions.
static String	getJavaVM() Returns the JVM name and version string, without throwing any exceptions.
static void	main(String[] args) Invokes the main method of a named class with logging configuration specified on the command line.
static Parameter<?>[]	sortParameters(Parameter<?>[] params) Sorts a list of Parameter objects.
static void	summariseError(Throwable error, PrintStream out) Writes a summary of a (possibly nested) exception to a given output stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

InvokeUtils

public InvokeUtils()

Method Detail

configureLogging

public static void configureLogging(int verbosity,
                                    boolean debug)

Sets up the logging system.

Parameters:

verbosity - number of levels greater than default to set

debug - whether debugging mode is on

getJavaVersion

public static String getJavaVersion()

Returns the JVM version, without throwing any exceptions.

Returns:

java version

getJavaVM

public static String getJavaVM()

Returns the JVM name and version string, without throwing any exceptions.

Returns:

JVM description

summariseError

public static void summariseError(Throwable error,
                                  PrintStream out)

Writes a summary of a (possibly nested) exception to a given output stream.

Parameters:

error - exception

out - destination stream

sortParameters

public static Parameter<?>[] sortParameters(Parameter<?>[] params)

Sorts a list of Parameter objects. Numbered ones are followed by unnumbered ones.

Parameters:

params - input list

Returns:

output list

main

public static void main(String[] args)
                 throws Throwable

Invokes the main method of a named class with logging configuration specified on the command line. The -verbose/+verbose flags and the -debug flag may be supplied before the target classname and arguments.

Throws:

Throwable