Package de.iip_ecosphere.platform.services.spring.loader

Class AppStarter

java.lang.Object

de.iip_ecosphere.platform.services.spring.loader.AppStarter

public class AppStarter
extends Object

Frontend class for the actual generated application start class to get the class loading context right. This class shall have no dependencies into oktoflow to keep the initial class loader clean.

Author:

Holger Eichelberger, SSE

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AppStarter.AccessibleJarLauncher	An accessible Jar Launcher if we need an (usual) root classloader.
static class	AppStarter.AccessibleLauncher	Implements an accessible launcher just to access the Spring packaged JARs in the way Spring is doing it.
(package private) static class	AppStarter.ChildFirstLaunchedURLClassLoader	A delegating child-first classloader.
(package private) static class	AppStarter.ChildIndexedUrlClassLoader	A delegating child-first classloader.
(package private) static class	AppStarter.ChildLaunchedURLClassLoader	A delegating child classloader to make internal methods accessible.
(package private) static final class	AppStarter.ClassPathIndexFile	A class path index file that provides ordering information for JARs.
(package private) static class	AppStarter.IndexedUrlClassLoader	Creates an indexed child-firstclass loader taking into account the first given URL as it contains directly stored classes/resources.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	APP_CLASSPATH
static final String	APP_CLASSPATH_INDEX_LOCATION
private static String	mainClass
static final String	PROPERTY_MAIN_CLASS

Constructor Summary

Constructors

Constructor	Description
AppStarter()

Method Summary

Modifier and Type	Method	Description
static ClassLoader	createClassloader(File jarFile)	Creates a classloader for jarFile.
static void	main(String[] args)	Executes the application by getting the class loading right and by calling the corresponding main method of mainClass.
(package private) static List<String>	readLines(InputStream in)	Reads the given input streams as lines.
static void	setMainClass(String cls)	Re-defines the qualified name of the main class.

Methods inherited from class java.lang.Object

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

Field Details

PROPERTY_MAIN_CLASS

public static final String PROPERTY_MAIN_CLASS

See Also:

• Constant Field Values

APP_CLASSPATH_INDEX_LOCATION

public static final String APP_CLASSPATH_INDEX_LOCATION

See Also:

• Constant Field Values

APP_CLASSPATH

public static final String APP_CLASSPATH

See Also:

• Constant Field Values

mainClass

private static String mainClass

Constructor Details

AppStarter

public AppStarter()

Method Details

setMainClass

public static void setMainClass(String cls)

Re-defines the qualified name of the main class.

Parameters:

cls - the qualified name of the main class

createClassloader

public static ClassLoader createClassloader(File jarFile)
                                     throws Exception

Creates a classloader for jarFile.

Parameters:

jarFile - the jar file to create a class loader for

Returns:

the class loader (single or isolating)

Throws:

Exception - if loading the archive/creating the class loader fails

main

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

Executes the application by getting the class loading right and by calling the corresponding main method of mainClass.

Parameters:

args - command line arguments

Throws:

Exception - if any exception occurred during startup

readLines

static List<String> readLines(InputStream in)

Reads the given input streams as lines.

Parameters:

in - the input stream

Returns:

the lines