com.iizix.server

Class PluginLoader

java.lang.Object

com.iizix.server.PluginLoader

public class PluginLoader
extends Object

The plug-in loader class checking for plug-in dependencies in a Module project.

Author:

Christopher Mindus

Constructor Summary

Constructors

Constructor and Description
PluginLoader(PropFactory factory, ClassLoader classLoader) Creates the instance.

Method Summary

Modifier and Type	Method and Description
ClassLoader	createClassLoader(ClassLoader parentClassLoader) Creates a new classloader that also handles loading classes from the added plugins.
String	getLoadedPlugins() Gets the comma-separated list of loaded plugins.
List<IPluginDescriptor<?>>	loadPlugins(String names) Loads required plug-in's.

Methods inherited from class java.lang.Object

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

Constructor Detail

PluginLoader

public PluginLoader(PropFactory factory,
                    ClassLoader classLoader)

Creates the instance.

Parameters:

factory - The factory to register the plug-ins in.

classLoader - The ClassLoader to use when running in a Server environment.

Method Detail

loadPlugins

public List<IPluginDescriptor<?>> loadPlugins(String names)
                                       throws IOException

Loads required plug-in's.

Each plug-in must have a class called "name.server.Descriptor" that implement the interface com.iizix.IPluginDescriptor available.

The plug-in definition should be found at the "name/schema/properties.xml", but the iiziGo modules have the "iizigo" module instead of "iizix". To figure out translation of names, a class called "name.server.Descriptor" is loaded and should implement the interface

Parameters:

names - The plug-in name, e.g. "com.iizigo.db,com.iizigo.term,com.iizigo.ws".

Returns:

The list of plug-in descriptors.

Throws:

IOException - If a plug-in failed to load.

getLoadedPlugins

public String getLoadedPlugins()

Gets the comma-separated list of loaded plugins.

Returns:

The comma-separated list of loaded plugins, empty string for none.

createClassLoader

public ClassLoader createClassLoader(ClassLoader parentClassLoader)

Creates a new classloader that also handles loading classes from the added plugins.

Parameters:

parentClassLoader - The parent class loaders, must be defined.

Returns:

A new class loader.