[arquillian-issues] [JBoss JIRA] (ARQ-2016) Improve the ability to add custom extensions for the containers

Improve the ability to add custom extensions for the containers --------------------------------------------------------------- Key: ARQ-2016 URL: https://issues.jboss.org/browse/ARQ-2016 Project: Arquillian Issue Type: Feature Request Components: OSGi Containers Affects Versions: osgi_2.1.0.Final Environment: Under Linux, and inside Karaf 4.x Reporter: Steve Storck When the arquillian-container-osgi extension is deployed, it also deploys the arquillian-osgi-bundle. This bundle exposes a few APIs, but it contains (and does not expose) some of the implementation and SPI packages. This effectively results in only being able to use the provided JUnitBundleTestRunner extension. I want to use the arquillian-testrunner-spock extension, but it always fails because I have to deploy the test SPI bundle with my test jar, and it conflicts with those packages that the arquillian-osgi-bundle uses internally. This causes an exception to be thrown that complains that the EventTestRunnerAdaptor implementation is not an instance of the TestRunnerAdaptor interface. The chain of events that results in the exception is as follows: {code:java|title=ArquillianSputnik.java (arquillian-testrunner-spock)|borderStyle=solid} package org.jboss.arquillian.spock; public class ArquillianSputnik extends Sputnik { import org.jboss.arquillian.test.spi.TestRunnerAdaptor; import org.jboss.arquillian.test.spi.TestRunnerAdaptorBuilder; // Methods and fields omitted for brevity, but you can see that the // proper packages are imported public void run(RunNotifier notifier) { // Code omitted for brevity final TestRunnerAdaptor adaptor = TestRunnerAdaptorBuilder.build(); // More code omitted for brevity } } {code} {code:java|title=EventTestRunnerAdaptorBuilder.java (arquillian-core test/spi)|borderStyle=solid} package org.jboss.arquillian.test.spi; public class TestRunnerAdaptorBuilder { private static final String DEFAULT_EXTENSION_CLASS = "org.jboss.arquillian.core.impl.loadable.LoadableExtensionLoader"; private static final String TEST_RUNNER_IMPL_CLASS = "org.jboss.arquillian.test.impl.EventTestRunnerAdaptor"; public static TestRunnerAdaptor build() { // omitted lines for brevity ManagerBuilder builder = ManagerBuilder.from() .extension(SecurityActions.loadClass(DEFAULT_EXTENSION_CLASS)); return SecurityActions.newInstance( TEST_RUNNER_IMPL_CLASS, new Class<?>[] {ManagerBuilder.class}, new Object[] {builder}, TestRunnerAdaptor.class); } } {code} {code:java|title=SecurityActions.java (arquillian-core test/spi)|borderStyle=solid} package org.jboss.arquillian.test.spi; final class SecurityActions { static <T> T newInstance(final String className, final Class<?>[] argumentTypes, final Object[] arguments, final Class<T> expectedType) { @SuppressWarnings("unchecked") Class<T> implClass = (Class<T>) loadClass(className); if (!expectedType.isAssignableFrom(implClass)) { throw new RuntimeException("Loaded class " + className + " is not of expected type " + expectedType); } return newInstance(implClass, argumentTypes, arguments); } } {code} I think that the best solution would be to completely decouple the JUnitTestRunner from the container modules, or at the very least, it would be good to change the <_exportcontents> to export most (or all) of the embedded dependency packages so that users can make use of other extensions, or build their own. Edit: After some more thought, it would be really nice to make test extensions loadable (with a default if it is unspecified, of course). I don't know enough about the code base (yet) to say if it would be best to do this via an annotation, or if pluggability would be better leveraged somewhere else in the framework.