Example usage for java.util ServiceLoader iterator

Introduction

In this page you can find the example usage for java.util ServiceLoader iterator.

Prototype

public Iterator<S> iterator() 

Source Link

Document

Returns an iterator to lazily load and instantiate the available providers of this loader's service.

Usage

From source file:org.ejbca.ui.web.admin.cainterface.CAInterfaceBean.java

/** Returns true if any CVC CA implementation is available, false otherwise.
 * Used to hide/give warning when no CVC CA implementation is available.
 */// w  w w  .j  a  v  a  2  s .  c o m
public boolean isCVCAvailable() {
    boolean ret = false;
    ServiceLoader<? extends CvcPlugin> loader = CvcCA.getImplementationClasses();
    if (loader.iterator().hasNext()) {
        ret = true;
    }
    return ret;
}

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From source file:org.kie.server.controller.websocket.management.KieServerMgmtCommandServiceImpl.java

private KieServerMgmtCommandServiceImpl() {
    ServiceLoader<PersistingServerTemplateStorageService> storageServices = ServiceLoader
            .load(PersistingServerTemplateStorageService.class);
    if (storageServices != null && storageServices.iterator().hasNext()) {
        PersistingServerTemplateStorageService storageService = storageServices.iterator().next();
        setTemplateStorage(storageService.getTemplateStorage());
    } else {/*from w ww .  j  a  v  a  2s  .c om*/
        LOGGER.debug(
                "No server template storage defined. Default storage: InMemoryKieServerTemplateStorage will be used");
    }

    ServiceLoader<NotificationServiceFactory> notificationServiceLoader = ServiceLoader
            .load(NotificationServiceFactory.class);
    if (notificationServiceLoader != null && notificationServiceLoader.iterator().hasNext()) {
        final NotificationService notificationService = notificationServiceLoader.iterator().next()
                .getNotificationService();
        setNotificationService(notificationService);
    } else {
        LOGGER.warn(
                "Notification service not defined. Default notification: LoggingNotificationService will be used");
    }
}

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From source file:org.kitodo.serviceloader.KitodoServiceLoader.java

/**
 * Loads a module from the classpath which implements the constructed clazz.
 * Frontend files of all modules will be loaded into the core module.
 *
 * @return A module with type T.// ww  w. ja v a2  s.c  om
 */
@SuppressWarnings("unchecked")
public T loadModule() {

    loadModulesIntoClasspath();
    loadBeans();
    loadFrontendFilesIntoCore();

    ServiceLoader<T> loader = ServiceLoader.load(clazz);

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

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From source file:org.lable.oss.dynamicconfig.di.DynamicConfigModule.java

@Provides
@Singleton//  w ww .j  a v  a  2 s. co m
public HierarchicalConfigurationDeserializer provideDeserializer() throws ConfigurationException {
    ServiceLoader<HierarchicalConfigurationDeserializer> serviceLoader = ServiceLoader
            .load(HierarchicalConfigurationDeserializer.class);

    Iterator<HierarchicalConfigurationDeserializer> iterator = serviceLoader.iterator();
    if (!iterator.hasNext()) {
        throw new ConfigurationException("No HierarchicalConfigurationDeserializer found on the classpath. "
                + "You may need to load a module containing a suitable deserializer.");
    }

    HierarchicalConfigurationDeserializer hierarchicalConfigurationDeserializer = iterator.next();
    logger.info("Found HierarchicalConfigurationDeserializer {}; providing it to the configuration system.",
            hierarchicalConfigurationDeserializer.getClass().getName());
    return hierarchicalConfigurationDeserializer;
}

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From source file:org.openflexo.foundation.sg.implmodel.TechnologyModuleDefinition.java

/**
 * Retrieve all {@link TechnologyModuleDefinition} available from classpath. <br>
 * Map contains the TechnologyModuleDefinition name as key and the TechnologyModuleDefinition itself as value.
 * /*www  .  ja va  2s .c o m*/
 * @return the retrieved TechnologyModuleDefinition map.
 */
private static Map<String, TechnologyModuleDefinition> getTechnologyModuleDefinitionMap() {
    if (technologyModuleDefinitionMap == null) {
        technologyModuleDefinitionMap = new Hashtable<String, TechnologyModuleDefinition>();

        ServiceLoader<TechnologyModuleDefinition> loader = ServiceLoader.load(TechnologyModuleDefinition.class);
        Iterator<TechnologyModuleDefinition> iterator = loader.iterator();
        while (iterator.hasNext()) {
            TechnologyModuleDefinition technologyModuleDefinition = iterator.next();

            if (technologyModuleDefinitionMap.containsKey(technologyModuleDefinition.getName())) {
                logger.severe("Cannot include TechnologyModuleDefinition with name '"
                        + technologyModuleDefinition.getName()
                        + "' because it already exists !!!! A Technology module name MUST be unique !");
            } else {
                technologyModuleDefinitionMap.put(technologyModuleDefinition.getName(),
                        technologyModuleDefinition);
            }
        }
    }

    return technologyModuleDefinitionMap;
}

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From source file:org.opoo.press.impl.FactoryImpl.java

public <T> T instantiate(Class<T> clazz) {
    ServiceLoader<T> loader = ServiceLoader.load(clazz, site.getClassLoader());
    Iterator<T> iterator = loader.iterator();
    if (iterator.hasNext()) {
        return apply(iterator.next());
    }//from ww  w.j a  v  a  2s.  c o m

    String className = (String) configuration.get(clazz.getName());
    if (StringUtils.isBlank(className) || "none".equalsIgnoreCase(className)) {
        return null;
    }
    return newInstance(className);
}

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From source file:org.ops4j.pax.exam.forked.ForkedFrameworkFactoryTest.java

@Test
public void forkEquinox()
        throws BundleException, IOException, InterruptedException, NotBoundException, URISyntaxException {
    ServiceLoader<FrameworkFactory> loader = ServiceLoader.load(FrameworkFactory.class);
    FrameworkFactory frameworkFactory = loader.iterator().next();

    ForkedFrameworkFactory forkedFactory = new ForkedFrameworkFactory(frameworkFactory);

    Map<String, Object> frameworkProperties = new HashMap<String, Object>();
    frameworkProperties.put(Constants.FRAMEWORK_STORAGE, storage.getAbsolutePath());
    RemoteFramework framework = forkedFactory.fork(Collections.<String>emptyList(),
            Collections.<String, String>emptyMap(), frameworkProperties);
    framework.start();/*from  w  w w .j  a v a  2 s .c  o  m*/

    long bundleId = framework.installBundle("file:target/bundles/regression-pde-bundle-2.3.0.jar");
    framework.startBundle(bundleId);

    framework.callService("(objectClass=org.ops4j.pax.exam.regression.pde.HelloService)", "getMessage");

    Thread.sleep(3000);
    framework.stop();

    forkedFactory.join();
}

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From source file:org.ops4j.pax.exam.forked.ForkedFrameworkFactoryTest.java

@Test
public void forkWithBootClasspath()
        throws BundleException, IOException, InterruptedException, NotBoundException, URISyntaxException {
    ServiceLoader<FrameworkFactory> loader = ServiceLoader.load(FrameworkFactory.class);
    FrameworkFactory frameworkFactory = loader.iterator().next();

    ForkedFrameworkFactory forkedFactory = new ForkedFrameworkFactory(frameworkFactory);

    List<String> bootClasspath = Arrays
            .asList(new File("target/bundles/metainf-services.jar").getCanonicalPath());

    Map<String, Object> frameworkProperties = new HashMap<String, Object>();
    frameworkProperties.put(Constants.FRAMEWORK_STORAGE, storage.getAbsolutePath());
    frameworkProperties.put(Constants.FRAMEWORK_SYSTEMPACKAGES_EXTRA, "org.kohsuke.metainf_services");
    RemoteFramework framework = forkedFactory.fork(Collections.<String>emptyList(),
            Collections.<String, String>emptyMap(), frameworkProperties, null, bootClasspath);
    framework.start();//from w ww  .j  a va  2s. c o m

    File testBundle = generateBundle();
    long bundleId = framework.installBundle("file:" + testBundle.getAbsolutePath());
    framework.startBundle(bundleId);

    // START>>> not yet implemented
    // framework.waitForState(bundleId, Bundle.ACTIVE, 1500);
    Thread.sleep(3000);
    // <<<END not yet implemented

    framework.stop();

    forkedFactory.join();
}

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From source file:org.ops4j.pax.exam.forked.ForkedFrameworkFactoryTest.java

@Test(expected = TestContainerException.class)
public void forkWithInvalidBootClasspath()
        throws BundleException, IOException, InterruptedException, NotBoundException, URISyntaxException {
    ServiceLoader<FrameworkFactory> loader = ServiceLoader.load(FrameworkFactory.class);
    FrameworkFactory frameworkFactory = loader.iterator().next();

    ForkedFrameworkFactory forkedFactory = new ForkedFrameworkFactory(frameworkFactory);

    List<String> bootClasspath = Arrays
            .asList(CoreOptions.maven("org.kohsuke.metainf-services", "metainf-services", "1.2").getURL());

    Map<String, Object> frameworkProperties = new HashMap<String, Object>();
    frameworkProperties.put(Constants.FRAMEWORK_STORAGE, storage.getAbsolutePath());
    frameworkProperties.put(Constants.FRAMEWORK_SYSTEMPACKAGES_EXTRA, "org.kohsuke.metainf_services");
    forkedFactory.fork(Collections.<String>emptyList(), Collections.<String, String>emptyMap(),
            frameworkProperties, null, bootClasspath);
}

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From source file:org.parallelj.launching.transport.tcp.command.AbstractLaunchTcpCommand.java

public List<IOption> getOptions() {
    final Class<? extends IOption> iOptionClass = this.getOptionClass();
    if (iOptionClass != null) {
        if (this.options == null) {
            this.options = new ArrayList<IOption>();
            ServiceLoader<? extends IOption> loader = CacheableServiceLoader.INSTANCE.load(iOptionClass,
                    AbstractLaunchTcpCommand.class.getClassLoader());
            if (loader == null || loader.iterator() == null || !loader.iterator().hasNext()) {
                loader = CacheableServiceLoader.INSTANCE.load(iOptionClass,
                        Thread.currentThread().getContextClassLoader());
            }//from  w  w  w . j a  v  a 2s. c  om
            for (IOption option : loader) {
                this.options.add(option);
            }
        }
    }

    // Sort the list of IOption.
    // The first IOption should be "id" as it is the only once mandatory
    final Comparator<IOption> comparator = new Comparator<IOption>() {
        public int compare(final IOption option1, final IOption option2) {
            if (option1.getOption() != null && option1.getOption().isRequired()) {
                return -1;
            }
            if (option2.getOption() != null && option2.getOption().isRequired()) {
                return 1;
            }
            return 0;
        }
    };
    Collections.sort(this.options, comparator);

    return this.options;
}

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