How to use

ServiceLoader

in

org.jboss.arquillian.container.test.spi.util

  /**
   * Dynamically loads an instance of a test runner.
   *
   * @return A Initialized TestRunner
   *
   * @throws IllegalStateException
   *     if multiple TestRunners found in classpath.
   */
  public static TestRunner getTestRunner(ClassLoader classLoader) {
    ServiceLoader<TestRunner> serviceLoader = ServiceLoader.load(TestRunner.class, classLoader);

    if (serviceLoader.getProviders().size() > 1) {
      throw new IllegalStateException("Multiple TestRunners found, only one allowed. Check your classpath");
    }

    return serviceLoader.iterator().next();
  }
}

/**
 * Creates a new service loader for the given service type and class loader.
 *
 * @param service
 *     The interface or abstract class representing the service
 * @param loader
 *     The class loader to be used to load provider-configuration
 *     files and provider classes, or null if the system class loader
 *     (or, failing that, the bootstrap class loader) is to be used
 *
 * @return A new service loader
 */
public static <S> ServiceLoader<S> load(Class<S> service, ClassLoader loader) {
  if (loader == null) {
    loader = service.getClassLoader();
  }
  return new ServiceLoader<S>(service, loader);
}

public Set<S> getProviders() {
  if (providers == null) {
    reload();
  }
  return Collections.unmodifiableSet(providers);
}

  public ServiceLoader<AutomaticDeployment> find() {
    return ServiceLoader.load(AutomaticDeployment.class);
  }
};

@Before
public void setUpTest() {
  DeploymentConfiguration.DeploymentContentBuilder content = new DeploymentConfiguration.DeploymentContentBuilder(ShrinkWrap.create(
    JavaArchive.class));
  when(automaticDeployment.generateDeploymentScenario(any(TestClass.class))).thenReturn(content.get());
  final List<AutomaticDeployment> deploymentContents = new ArrayList<AutomaticDeployment>();
  deploymentContents.add(automaticDeployment);
  when(automaticDeploymentLocator.find()).thenReturn(serviceLoader);
  when(serviceLoader.iterator()).thenReturn(deploymentContents.iterator());
}

providers.add(createInstance(line));

  public ServiceLoader<AutomaticDeployment> find() {
    return ServiceLoader.load(AutomaticDeployment.class);
  }
};

@Before
public void setUpTest() {
  DeploymentConfiguration.DeploymentContentBuilder content = new DeploymentConfiguration.DeploymentContentBuilder(ShrinkWrap.create(
    JavaArchive.class));
  when(automaticDeployment.generateDeploymentScenario(any(TestClass.class))).thenReturn(content.get());
  final List<AutomaticDeployment> deploymentContents = new ArrayList<AutomaticDeployment>();
  deploymentContents.add(automaticDeployment);
  when(automaticDeploymentLocator.find()).thenReturn(serviceLoader);
  when(serviceLoader.iterator()).thenReturn(deploymentContents.iterator());
}

providers.add(createInstance(line));

  /**
   * Dynamically loads an instance of a test runner.
   *
   * @return A Initialized TestRunner
   *
   * @throws IllegalStateException
   *     if multiple TestRunners found in classpath.
   */
  public static TestRunner getTestRunner(ClassLoader classLoader) {
    ServiceLoader<TestRunner> serviceLoader = ServiceLoader.load(TestRunner.class, classLoader);

    if (serviceLoader.getProviders().size() > 1) {
      throw new IllegalStateException("Multiple TestRunners found, only one allowed. Check your classpath");
    }

    return serviceLoader.iterator().next();
  }
}

/**
 * Creates a new service loader for the given service type, using the current
 * thread's context class loader.
 * <p>
 * An invocation of this convenience method of the form
 * <p>
 * {@code ServiceLoader.load(service)</code>}
 * <p>
 * is equivalent to
 * <p>
 * <code>ServiceLoader.load(service,
 * Thread.currentThread().getContextClassLoader())</code>
 *
 * @param service
 *     The interface or abstract class representing the service
 *
 * @return A new service loader
 */
public static <S> ServiceLoader<S> load(Class<S> service) {
  return load(service, Thread.currentThread().getContextClassLoader());
}

public Set<S> getProviders() {
  if (providers == null) {
    reload();
  }
  return Collections.unmodifiableSet(providers);
}

/**
 * Creates a new service loader for the given service type and class loader.
 *
 * @param service
 *     The interface or abstract class representing the service
 * @param loader
 *     The class loader to be used to load provider-configuration
 *     files and provider classes, or null if the system class loader
 *     (or, failing that, the bootstrap class loader) is to be used
 *
 * @return A new service loader
 */
public static <S> ServiceLoader<S> load(Class<S> service, ClassLoader loader) {
  if (loader == null) {
    loader = service.getClassLoader();
  }
  return new ServiceLoader<S>(service, loader);
}

/**
 * Creates a new service loader for the given service type, using the current
 * thread's context class loader.
 * <p>
 * An invocation of this convenience method of the form
 * <p>
 * {@code ServiceLoader.load(service)</code>}
 * <p>
 * is equivalent to
 * <p>
 * <code>ServiceLoader.load(service,
 * Thread.currentThread().getContextClassLoader())</code>
 *
 * @param service
 *     The interface or abstract class representing the service
 *
 * @return A new service loader
 */
public static <S> ServiceLoader<S> load(Class<S> service) {
  return load(service, Thread.currentThread().getContextClassLoader());
}

reload();

ArquillianConfig(Set<String> testClasses, String deploymentUnitName) {
  this.serviceName = getServiceName(deploymentUnitName);
  this.testClasses.addAll(testClasses);
  for(ArquillianConfigServiceCustomizer customizer : ServiceLoader.load(ArquillianConfigServiceCustomizer.class)) {
    serviceCustomizers.add(customizer);
  }
}

reload();

ArquillianConfig(Set<String> testClasses, String deploymentUnitName) {
  this.serviceName = getServiceName(deploymentUnitName);
  this.testClasses.addAll(testClasses);
  for(ArquillianConfigServiceCustomizer customizer : ServiceLoader.load(ArquillianConfigServiceCustomizer.class)) {
    serviceCustomizers.add(customizer);
  }
}