edu.rit.pj.cluster

Class BackendClassLoader

java.lang.Object

java.lang.ClassLoader

edu.rit.pj.cluster.BackendClassLoader

public class BackendClassLoader
extends java.lang.ClassLoader

Class BackendClassLoader provides a class loader for a job backend process in the PJ cluster middleware. If a backend class loader is requested to load a class and the parent class loaders cannot do so, the backend class loader sends a request for the class file to the job frontend process, waits for the job frontend process to send the class file, and loads the class.

Class BackendClassLoader supports loading of resources that are class files. Support for loading of resources that are not class files is TBD.

Constructor Summary

Constructors

Constructor and Description
BackendClassLoader(java.lang.ClassLoader parent, JobBackendRef theJobBackend, JobFrontendRef theJobFrontend, ResourceCache theCache) Construct a new backend class loader.
BackendClassLoader(JobBackendRef theJobBackend, JobFrontendRef theJobFrontend, ResourceCache theCache) Construct a new backend class loader.

Method Summary

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus

Methods inherited from class java.lang.Object

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

Constructor Detail

BackendClassLoader

public BackendClassLoader(JobBackendRef theJobBackend,
                          JobFrontendRef theJobFrontend,
                          ResourceCache theCache)

Construct a new backend class loader. The parent class loader is the one returned by ClassLoader.getSystemClassLoader(). Class files will be requested from theJobFrontend. Class files will be stored in theCache.

Parameters:

theJobBackend - Reference to job backend.

theJobFrontend - Reference to job frontend.

theCache - Resource cache.

BackendClassLoader

public BackendClassLoader(java.lang.ClassLoader parent,
                          JobBackendRef theJobBackend,
                          JobFrontendRef theJobFrontend,
                          ResourceCache theCache)

Construct a new backend class loader. The parent class loader is parent. Class files will be requested from theJobFrontend. Class files will be stored in theCache.

Parameters:

parent - Parent class loader.

theJobBackend - Reference to job backend.

theJobFrontend - Reference to job frontend.

theCache - Resource cache.