Examples with ResourceSet org.apache.zeppelin.resource.ResourceSet used on opensource projects

Example 6 with ResourceSet

use of org.apache.zeppelin.resource.ResourceSet in project zeppelin by apache.

the class ApplicationLoader method load.

/**
   *
   * Instantiate application
   *
   * @param packageInfo
   * @param context
   * @return
   * @throws Exception
   */
public Application load(HeliumPackage packageInfo, ApplicationContext context) throws Exception {
    if (packageInfo.getType() != HeliumType.APPLICATION) {
        throw new ApplicationException("Can't instantiate " + packageInfo.getType() + " package using ApplicationLoader");
    }
    // check if already loaded
    RunningApplication key = new RunningApplication(packageInfo, context.getNoteId(), context.getParagraphId());
    // get resource required by this package
    ResourceSet resources = findRequiredResourceSet(packageInfo.getResources(), context.getNoteId(), context.getParagraphId());
    // load class
    Class<Application> appClass = loadClass(packageInfo);
    // instantiate
    ClassLoader oldcl = Thread.currentThread().getContextClassLoader();
    ClassLoader cl = appClass.getClassLoader();
    Thread.currentThread().setContextClassLoader(cl);
    try {
        Constructor<Application> constructor = appClass.getConstructor(ApplicationContext.class);
        Application app = new ClassLoaderApplication(constructor.newInstance(context), cl);
        return app;
    } catch (Exception e) {
        throw new ApplicationException(e);
    } finally {
        Thread.currentThread().setContextClassLoader(oldcl);
    }
}