Examples of co.cask.tigon.lang.jar.ProgramClassLoader

co.cask.tigon.lang.jar.ProgramClassLoader
ClassLoader that implements bundle jar feature, in which the application jar contains its dependency jars inside the "/lib" folder (by default) within the application jar.
Useful for 1) using third party jars that overwrite each other's files (e.g. Datanucleus jars each have plugin.xml at same location relative to the jar root, so if you package your application as an uber-jar, your application jar will only contain one of the plugin.xml at best unless you do some manual configuration.
Not (yet) useful for 1) avoiding classpath conflicts with Tigon's dependency jars (e.g. you want to use Guava 16.0.1 but Tigon uses 13.0.1)

    }
  }


  public Program createProgram(File jarPath, String classToLoad, File jarUnpackDir) throws Exception {
    expandJar(jarPath, jarUnpackDir);
    ProgramClassLoader classLoader = ClassLoaders.newProgramClassLoader(jarUnpackDir,
                                                                        ApiResourceListHolder.getResourceList());
    Class<?> clz = classLoader.loadClass(classToLoad);
    if (!(clz.newInstance() instanceof Flow)) {
      throw new Exception("Expected Flow class");
    }
    ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
    Thread.currentThread().setContextClassLoader(classLoader);

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  public static ProgramClassLoader newProgramClassLoader(File unpackedJarDir,
                                                         Iterable<String> apiResourceList) throws IOException {
    Predicate<String> predicate = Predicates.in(Sets.newHashSet(apiResourceList));
    ClassLoader filterParent = Objects.firstNonNull(Thread.currentThread().getContextClassLoader(),
                                                    ClassLoaders.class.getClassLoader());
    return new ProgramClassLoader(unpackedJarDir, new FilterClassLoader(predicate, filterParent));
  }

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