Package org.gridgain.ignite.migrationtools.adapter.internal

Class ClassloaderUtils

java.lang.Object

org.gridgain.ignite.migrationtools.adapter.internal.ClassloaderUtils

public class ClassloaderUtils
extends Object

Utility class that provides a method to setup the guest Classloader, where the adapter core modules are loaded.

Method Summary

Modifier and Type	Method	Description
static ClassLoader	createClassLoader(ClassLoader hostClassLoader, ClassLoader parentClassloader, URL[] dependencies)	Creates the classloader for the adapter classes.
static ClassLoader	getGuestClassloader()	Retrieves the guest classloader holding the GridGain 9 classes.
static URL[]	loadDependenciesFromResource(ClassLoader classloader, String resource)	Loads a dependencies file from the provided classloader and filename.
static URL[]	loadRuntimeDependencies(ClassLoader classLoader)	Computes the paths for the adapter runtime dependencies.

Methods inherited from class java.lang.Object

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

Method Details

getGuestClassloader

public static ClassLoader getGuestClassloader()

Retrieves the guest classloader holding the GridGain 9 classes.

Returns:

The guest classloader.

loadRuntimeDependencies

public static URL[] loadRuntimeDependencies(ClassLoader classLoader)

Computes the paths for the adapter runtime dependencies.

Parameters:

classLoader - Classloader here the bootstrap class is located. Probably not needed.

Returns:

URLs for the runtime dependencies.

loadDependenciesFromResource

public static URL[] loadDependenciesFromResource(ClassLoader classloader,
 String resource)

Loads a dependencies file from the provided classloader and filename. The file contains the path of each dependency one per line.

Parameters:

classloader - Classloader that holds the resource.

resource - Resource name

Returns:

List of URLs loaded from the resource file.

createClassLoader

public static ClassLoader createClassLoader(ClassLoader hostClassLoader,
 ClassLoader parentClassloader,
 URL[] dependencies)
                                     throws IOException

Creates the classloader for the adapter classes. This classloader imports ai2 classes from the host classloader.

Parameters:

hostClassLoader - ClassLoader with Ignite 2 classes to be imported.

parentClassloader - Parent Classloader, should only contain classes from Ignite 3.

dependencies - Migration Tools Adapter artifacts, plus any necessary third-party resources.

Returns:

ClassLoader holding the Adapter classes.

Throws:

IOException - In case of error loading information from the imported resources.