本文整理了Java中java.util.ServiceLoader.load()方法的一些代码示例，展示了ServiceLoader.load()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ServiceLoader.load()方法的具体详情如下：
包路径：java.util.ServiceLoader
类名称：ServiceLoader
方法名：load

ServiceLoader.load介绍

[英]Constructs a service loader, using the current thread's context class loader.
[中]使用当前线程的上下文类加载器构造服务加载器。

代码示例

代码示例来源：origin: ctripcorp/apollo

public static <S> Iterator<S> loadAll(Class<S> clazz) {
  ServiceLoader<S> loader = ServiceLoader.load(clazz);

  return loader.iterator();
 }
}

代码示例来源：origin: gocd/gocd

private IVProvider getIvProviderInstance() {
  if (ivProvider == null) {
    synchronized (AESEncrypter.class) {
      if (ivProvider == null) {
        ivProvider = ServiceLoader.load(IVProvider.class).iterator().next();
      }
    }
  }
  return ivProvider;
}

代码示例来源：origin: jenkinsci/jenkins

/**
 * Obtains the instance to be used.
 */
public static InitStrategy get(ClassLoader cl) throws IOException {
  Iterator<InitStrategy> it = ServiceLoader.load(InitStrategy.class, cl).iterator();
  if (!it.hasNext()) {
    return new InitStrategy(); // default
  }
  InitStrategy s = it.next();
  LOGGER.log(Level.FINE, "Using {0} as InitStrategy", s);
  return s;
}

代码示例来源：origin: apache/hbase

private static List<MetricRegistries> getDefinedImplemantations() {
  ServiceLoader<MetricRegistries> loader = ServiceLoader.load(MetricRegistries.class);
  List<MetricRegistries> availableFactories = new ArrayList<>();
  for (MetricRegistries impl : loader) {
   availableFactories.add(impl);
  }
  return availableFactories;
 }
}

代码示例来源：origin: wildfly/wildfly

private static List<Externalizer<Object>> loadExternalizers(ClassLoader loader) {
  List<Externalizer<Object>> loadedExternalizers = new LinkedList<>();
  for (Externalizer<Object> externalizer : ServiceLoader.load(Externalizer.class, loader)) {
    loadedExternalizers.add(externalizer);
  }
  Set<DefaultExternalizer> defaultExternalizers = EnumSet.allOf(DefaultExternalizer.class);
  List<Externalizer<Object>> result = new ArrayList<>(defaultExternalizers.size() + loadedExternalizers.size());
  result.addAll(defaultExternalizers);
  result.addAll(loadedExternalizers);
  return result;
}

代码示例来源：origin: google/data-transfer-project

public static Monitor loadMonitor() {
 List<Monitor> monitors = new ArrayList<>();
 ServiceLoader.load(MonitorExtension.class)
   .iterator()
   .forEachRemaining(
     extension -> {
      extension.getMonitor();
      extension.initialize();
      monitors.add(extension.getMonitor());
     });
 return monitors.isEmpty()
   ? new ConsoleMonitor(DEBUG)
   : new MultiplexMonitor((Monitor[]) monitors.toArray());
}

代码示例来源：origin: eclipse-vertx/vert.x

public static <T> Collection<T> loadFactories(Class<T> clazz, ClassLoader classLoader) {
  List<T> list = new ArrayList<>();
  ServiceLoader<T> factories;
  if (classLoader != null) {
   factories = ServiceLoader.load(clazz, classLoader);
  } else {
   // this is equivalent to:
   // ServiceLoader.load(clazz, TCCL);
   factories = ServiceLoader.load(clazz);
  }
  if (factories.iterator().hasNext()) {
   factories.iterator().forEachRemaining(list::add);
   return list;
  } else {
   // By default ServiceLoader.load uses the TCCL, this may not be enough in environment dealing with
   // classloaders differently such as OSGi. So we should try to use the  classloader having loaded this
   // class. In OSGi it would be the bundle exposing vert.x and so have access to all its classes.
   factories = ServiceLoader.load(clazz, ServiceHelper.class.getClassLoader());
   if (factories.iterator().hasNext()) {
    factories.iterator().forEachRemaining(list::add);
    return list;
   } else {
    return Collections.emptyList();
   }
  }
 }
}

代码示例来源：origin: ch.qos.logback/logback-classic

public static <T> T loadFromServiceLoader(Class<T> c) {
  ServiceLoader<T> loader = ServiceLoader.load(c, getServiceLoaderClassLoader());
  Iterator<T> it = loader.iterator();
  if (it.hasNext())
    return it.next();
  return null;
}

代码示例来源：origin: apache/ignite

@Override public List<PluginProvider> run() {
    List<PluginProvider> providers = new ArrayList<>();
    ServiceLoader<PluginProvider> ldr = ServiceLoader.load(PluginProvider.class);
    for (PluginProvider provider : ldr)
      providers.add(provider);
    return providers;
  }
});

代码示例来源：origin: wildfly/wildfly

private static List<KeyFormat<?>> load(ClassLoader loader) {
    List<KeyFormat<?>> keyFormats = new LinkedList<>();
    for (KeyFormat<?> keyFormat : ServiceLoader.load(KeyFormat.class, loader)) {
      keyFormats.add(keyFormat);
    }

    List<KeyFormat<?>> result = new ArrayList<>(keyFormats.size() + 6);
    // Add key formats for common key types
    result.add(new SimpleKeyFormat<>(String.class, Function.identity()));
    result.add(new SimpleKeyFormat<>(Byte.class, Byte::valueOf));
    result.add(new SimpleKeyFormat<>(Short.class, Short::valueOf));
    result.add(new SimpleKeyFormat<>(Integer.class, Integer::valueOf));
    result.add(new SimpleKeyFormat<>(Long.class, Long::valueOf));
    result.add(new SimpleKeyFormat<>(UUID.class, UUID::fromString));
    result.addAll(keyFormats);

    return result;
  }
}

代码示例来源：origin: javax.enterprise/cdi-api

private static void findAllProviders() {
  ServiceLoader<CDIProvider> providerLoader;
  Set<CDIProvider> providers = new TreeSet<>(Comparator.comparingInt(CDIProvider::getPriority).reversed());
  providerLoader = ServiceLoader.load(CDIProvider.class, CDI.class.getClassLoader());
  if(! providerLoader.iterator().hasNext()) {
    throw new IllegalStateException("Unable to locate CDIProvider");
  }
  try {
    providerLoader.forEach(providers::add);
  } catch (ServiceConfigurationError e) {
    throw new IllegalStateException(e);
  }
  CDI.discoveredProviders = Collections.unmodifiableSet(providers);
}

代码示例来源：origin: SonarSource/sonarqube

Set<CoreExtension> load(ClassLoader classLoader) {
  ServiceLoader<CoreExtension> loader = ServiceLoader.load(CoreExtension.class, classLoader);
  return ImmutableSet.copyOf(loader.iterator());
 }
}

代码示例来源：origin: swagger-api/swagger-core

@Override
  public boolean exists(String path) {

    try {
      ServiceLoader<OpenAPIConfigBuilder> loader = ServiceLoader.load(OpenAPIConfigBuilder.class);
      if (loader.iterator().hasNext()) {
        loader.iterator().next();
        return true;
      }
      return false;
    } catch (Exception e) {
      return false;
    }
  }
}

代码示例来源：origin: apache/geode

private static List<ClientProtocolService> initializeProtocolServices() {
 List<ClientProtocolService> resultList = new LinkedList<>();
 for (ClientProtocolService clientProtocolService : ServiceLoader
   .load(ClientProtocolService.class)) {
  resultList.add(clientProtocolService);
 }
 return resultList;
}

代码示例来源：origin: oracle/helidon

private PolicyValidator(Builder builder) {
  //first find all services
  ServiceLoader<PolicyExecutorService> services = ServiceLoader.load(PolicyExecutorService.class);
  for (PolicyExecutorService service : services) {
    executors.add(service.instantiate(builder.config.get(service.configKey())));
  }
  //then add explicit
  this.executors.addAll(builder.executors);
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void testServiceListFactoryBean() {
  assumeTrue(ServiceLoader.load(DocumentBuilderFactory.class).iterator().hasNext());
  DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
  RootBeanDefinition bd = new RootBeanDefinition(ServiceListFactoryBean.class);
  bd.getPropertyValues().add("serviceType", DocumentBuilderFactory.class.getName());
  bf.registerBeanDefinition("service", bd);
  List<?> serviceList = (List<?>) bf.getBean("service");
  assertTrue(serviceList.get(0) instanceof DocumentBuilderFactory);
}

代码示例来源：origin: neo4j/neo4j

/**
   * @return instances of all classes with loadable configuration options
   */
  static List<LoadableConfig> allConfigClasses()
  {
    return Iterators.stream( ServiceLoader.load( LoadableConfig.class ).iterator() ).collect( Collectors.toList() );
  }
}

代码示例来源：origin: org.assertj/assertj-core

public static <SERVICE> SERVICE get(Class<SERVICE> serviceType, SERVICE defaultValue) {

  Iterator<SERVICE> services = ServiceLoader.load(serviceType, Services.class.getClassLoader()).iterator();

  SERVICE result = services.hasNext() ? services.next() : defaultValue;
  if (services.hasNext()) {
   result = defaultValue;
   System.err.println(format("Found multiple implementations for the service provider %s. Using the default: %s",
                serviceType, result.getClass()));
  }
  return result;
 }
}

代码示例来源：origin: apache/geode

private List<DistributedSystemService> initializeServices() {
 ServiceLoader<DistributedSystemService> loader =
   ServiceLoader.load(DistributedSystemService.class);
 List<DistributedSystemService> services = new ArrayList<>();
 for (DistributedSystemService service : loader) {
  services.add(service);
 }
 return services;
}

代码示例来源：origin: oracle/helidon

private AbacProvider(Builder builder) {
  ServiceLoader<AbacValidatorService> services = ServiceLoader.load(AbacValidatorService.class);
  for (AbacValidatorService service : services) {
    validators.add(service.instantiate(builder.config.get(service.configKey())));
  }
  this.validators.addAll(builder.validators);
  Set<Class<? extends Annotation>> annotations = new HashSet<>();
  Set<String> configKeys = new HashSet<>();
  Set<Class<? extends AbacValidatorConfig>> customObjects = new HashSet<>();
  validators.forEach(v -> {
    annotations.addAll(v.supportedAnnotations());
    configKeys.add(v.configKey());
    customObjects.add(v.configClass());
  });
  this.supportedAnnotations = Collections.unmodifiableSet(annotations);
  this.supportedConfigKeys = Collections.unmodifiableSet(configKeys);
  this.supportedCustomObjects = Collections.unmodifiableSet(customObjects);
  this.failOnUnvalidated = builder.failOnUnvalidated;
  this.failIfNoneValidated = builder.failIfNoneValidated;
}