Example usage for java.util ServiceLoader load

Introduction

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

Prototype

@CallerSensitive
public static <S> ServiceLoader<S> load(Class<S> service)

Source Link

Document

Creates a new service loader for the given service type, using the current thread's java.lang.Thread#getContextClassLoader context class loader .

Usage

From source file:org.apache.hadoop.gateway.filter.rewrite.impl.FrontendFunctionProcessorTest.java

@SuppressWarnings("rawtypes")
@Test/*  ww  w  . ja v a 2 s .  c  om*/
public void testServiceLoader() throws Exception {
    ServiceLoader loader = ServiceLoader.load(UrlRewriteFunctionProcessor.class);
    Iterator iterator = loader.iterator();
    assertThat("Service iterator empty.", iterator.hasNext());
    while (iterator.hasNext()) {
        Object object = iterator.next();
        if (object instanceof FrontendFunctionProcessor) {
            return;
        }
    }
    fail("Failed to find " + FrontendFunctionProcessor.class.getName() + " via service loader.");
}

From source file:org.apache.mnemonic.Utils.java

/**
 * retrieve a non-volatile memory allocator service
 * /*w w w. j a  v  a 2  s .c  om*/
 * @param id
 *          specify a name of allocator to retrieve
 *
 * @return the non-volatile memory allocator service instance
 */
public static NonVolatileMemoryAllocatorService getNonVolatileMemoryAllocatorService(String id) {
    NonVolatileMemoryAllocatorService ret = null;
    if (null == m_nvmasvcloader) {
        m_nvmasvcloader = ServiceLoader.load(NonVolatileMemoryAllocatorService.class);
    }
    Iterator<NonVolatileMemoryAllocatorService> svcit = m_nvmasvcloader.iterator();
    NonVolatileMemoryAllocatorService svc = null;
    while (null == ret && svcit.hasNext()) {
        svc = svcit.next();
        if (svc.getServiceId().equals(id)) {
            ret = svc;
        }
    }
    assert null != ret : "NonVolatileMemoryAllocatorService \'" + id + "\' not found!";
    return ret;
}

From source file:org.powertac.customer.CustomerModelService.java

@Override
public String initialize(Competition competition, List<String> completedInits) {
    if (!completedInits.contains("DefaultBroker") || !completedInits.contains("TariffMarket"))
        return null;
    super.init();
    tariffMarketService.registerNewTariffListener(this);
    //modelTypes = new ArrayList<Class<AbstractCustomerDeprecated>>();
    models = new ArrayList<AbstractCustomer>();
    // extract the model types
    ServiceLoader<AbstractCustomer> loader = ServiceLoader.load(AbstractCustomer.class);
    // Populate and initialize the models.
    // Note that the instances loaded by the service loader are discarded --
    // the real instances are created by serverConfig.
    Iterator<AbstractCustomer> modelIterator = loader.iterator();
    while (modelIterator.hasNext()) {
        AbstractCustomer modelEx = modelIterator.next();
        for (Object modelObj : serverConfig.configureInstances(modelEx.getClass())) {
            AbstractCustomer model = (AbstractCustomer) modelObj;
            models.add(model);//from  w w w .ja v a 2s.com
            model.setServiceAccessor(this);
            model.initialize();
            // set default tariff here to make models testable outside Spring.
            for (CustomerInfo cust : model.getCustomerInfos()) {
                tariffMarketService.subscribeToTariff(tariffMarketService.getDefaultTariff(cust.getPowerType()),
                        cust, cust.getPopulation());
                customerRepo.add(cust);
            }
        }
    }
    return "Customer";
}

From source file:com.googlecode.fascinator.api.PluginManager.java

/**
 * Get a list of access control plugins/*from   w w  w  .j a  va  2 s.co m*/
 *
 * @return map of access control plugin, or empty map if not found
 */
public static Map<String, AccessControl> getAccessControlPlugins() {
    Map<String, AccessControl> access_plugins = new HashMap<String, AccessControl>();
    ServiceLoader<AccessControl> plugins = ServiceLoader.load(AccessControl.class);
    for (AccessControl plugin : plugins) {
        access_plugins.put(plugin.getId(), plugin);
    }
    return access_plugins;
}

From source file:io.knotx.knot.templating.impl.HandlebarsKnotProxyImpl.java

private Handlebars createHandlebars() {
    Handlebars newHandlebars = new Handlebars();
    DefaultHandlebarsHelpers.registerFor(newHandlebars);

    ServiceLoader.load(CustomHandlebarsHelper.class).iterator().forEachRemaining(helper -> {
        newHandlebars.registerHelper(helper.getName(), helper);
        LOGGER.info("Registered custom Handlebars helper: {}", helper.getName());
    });/*w  w w . ja  va 2s . co  m*/

    return newHandlebars;
}

From source file:org.ops4j.pax.web.itest.util.TestConfiguration.java

public static boolean isEquinox() {
    FrameworkFactory factory = ServiceLoader.load(FrameworkFactory.class).iterator().next();
    return factory.getClass().getSimpleName().contains("Equinox");
}

From source file:org.messic.service.MessicMain.java

/**
 * Create an osgi framework/*from www . j a  v a2s  .c o m*/
 * 
 * @return {@link Framework} osgi framework created
 * @throws BundleException
 */
private static Framework createFramework() throws BundleException {
    FrameworkFactory frameworkFactory = ServiceLoader.load(FrameworkFactory.class).iterator().next();
    Framework framework = frameworkFactory.newFramework(getFelixConfig());
    framework.start();
    return framework;
}

From source file:kenh.expl.Environment.java

/**
 * Load function package through <code>Extension</code>.
 * @see Extension//from  w  w  w . ja v  a  2s  .c om
 */
private void loadFunctionPackages_Extension() {
    ServiceLoader<Extension> es = ServiceLoader.load(Extension.class);
    for (Extension e : es) {
        if (e != null) {
            Map<String, String> p = e.getFunctionPackages();
            if (p != null && p.size() > 0) {
                Set<String> keys = p.keySet();
                for (String key : keys) {
                    String funcPackage = p.get(key);
                    setFunctionPackage(key, funcPackage);
                }
            }
        }
    }
}

From source file:org.apache.mnemonic.Utils.java

/**
 * retrieve a durable general computing service
 *
 * @param id//from w  w  w  .j a v a 2 s  . c  om
 *          specify a name of general computing to retrieve
 *
 * @return the durable general computing service instance
 */
public static GeneralComputingService getGeneralComputingService(String id) {
    GeneralComputingService ret = null;
    if (null == m_gcompsvcloader) {
        m_gcompsvcloader = ServiceLoader.load(GeneralComputingService.class);
    }
    Iterator<GeneralComputingService> svcit = m_gcompsvcloader.iterator();
    GeneralComputingService svc = null;
    while (null == ret && svcit.hasNext()) {
        svc = svcit.next();
        if (svc.getServiceId().equals(id)) {
            ret = svc;
        }
    }
    assert null != ret : "GeneralComputingService \'" + id + "\' not found!";
    return ret;
}

From source file:org.cloudfoundry.reconfiguration.tomee.DelegatingPropertiesProvider.java

private PropertiesProvider getPropertiesProvider(ServiceInfo serviceInfo) {
    final ServiceLoader<PropertiesProvider> serviceLoader = ServiceLoader.load(PropertiesProvider.class);
    for (PropertiesProvider propertiesProvider : serviceLoader) {
        if (propertiesProvider.canProvide(serviceInfo)) {
            if (logger.isLoggable(Level.FINE)) {
                logger.fine("Found suitable PropertiesProvider for serviceId " + serviceId + ": "
                        + propertiesProvider.getClass());
            }/* w w  w. ja va  2 s .  c o m*/
            return propertiesProvider;
        }
    }

    throw new ConfigurationException(
            "Cannot find suitable PropertiesProvider for serviceId " + serviceId + ": " + serviceInfo);
}