org.springframework.boot.loader

Class Launcher

java.lang.Object

org.springframework.boot.loader.Launcher

Direct Known Subclasses:

ExecutableArchiveLauncher, PropertiesLauncher

public abstract class Launcher
extends Object

Base class for launchers that can start an application with a fully configured classpath backed by one or more Archives.

Author:

Phillip Webb, Dave Syer

Constructor Summary

Constructors

Constructor and Description
Launcher()

Method Summary

Modifier and Type	Method and Description
protected Archive	createArchive()
protected ClassLoader	createClassLoader(List<Archive> archives) Create a classloader for the specified archives.
protected ClassLoader	createClassLoader(URL[] urls) Create a classloader for the specified URLs.
protected MainMethodRunner	createMainMethodRunner(String mainClass, String[] args, ClassLoader classLoader) Create the MainMethodRunner used to launch the application.
protected abstract List<Archive>	getClassPathArchives() Returns the archives that will be used to construct the class path.
protected abstract String	getMainClass() Returns the main class that should be launched.
protected void	launch(String[] args) Launch the application.
protected void	launch(String[] args, String mainClass, ClassLoader classLoader) Launch the application given the archive file and a fully configured classloader.

Methods inherited from class java.lang.Object

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

Constructor Detail

Launcher

public Launcher()

Method Detail

launch

protected void launch(String[] args)
               throws Exception

Launch the application. This method is the initial entry point that should be called by a subclass public static void main(String[] args) method.

Parameters:

args - the incoming arguments

Throws:

Exception - if the application fails to launch

createClassLoader

protected ClassLoader createClassLoader(List<Archive> archives)
                                 throws Exception

Create a classloader for the specified archives.

Parameters:

archives - the archives

Returns:

the classloader

Throws:

Exception - if the classloader cannot be created

createClassLoader

protected ClassLoader createClassLoader(URL[] urls)
                                 throws Exception

Create a classloader for the specified URLs.

Parameters:

urls - the URLs

Returns:

the classloader

Throws:

Exception - if the classloader cannot be created

launch

protected void launch(String[] args,
                      String mainClass,
                      ClassLoader classLoader)
               throws Exception

Launch the application given the archive file and a fully configured classloader.

Parameters:

args - the incoming arguments

mainClass - the main class to run

classLoader - the classloader

Throws:

Exception - if the launch fails

createMainMethodRunner

protected MainMethodRunner createMainMethodRunner(String mainClass,
                                                  String[] args,
                                                  ClassLoader classLoader)

Create the MainMethodRunner used to launch the application.

Parameters:

mainClass - the main class

args - the incoming arguments

classLoader - the classloader

Returns:

the main method runner

getMainClass

protected abstract String getMainClass()
                                throws Exception

Returns the main class that should be launched.

Returns:

the name of the main class

Throws:

Exception - if the main class cannot be obtained

getClassPathArchives

protected abstract List<Archive> getClassPathArchives()
                                               throws Exception

Returns the archives that will be used to construct the class path.

Returns:

the class path archives

Throws:

Exception - if the class path archives cannot be obtained

createArchive

protected final Archive createArchive()
                               throws Exception

Throws:

Exception