* parameter, the object containing the method will not be able to register for event delivery from
 * the {@link EventBus}.
 *
 * <p>Unless also annotated with @{@link AllowConcurrentEvents}, event subscriber methods will be
 * invoked serially by each event bus that they are registered with.
 *
 * @author Cliff Biffle
 * @since 10.0
 */
@Retention(RetentionPolicy.RUNTIME)

![Interceptors Diagram](../assets/images/******@****.***)

### Application Interceptors

Interceptors are registered as either _application_ or _network_ interceptors. We'll use the `LoggingInterceptor` defined above to show the difference.

Register an _application_ interceptor by calling `addInterceptor()` on `OkHttpClient.Builder`:

```java
OkHttpClient client = new OkHttpClient.Builder()

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.base.MoreObjects;

/**
 * Wraps an event that was posted, but which had no subscribers and thus could not be delivered.
 *
 * <p>Registering a DeadEvent subscriber is useful for debugging or logging, as it can detect
 * misconfigurations in a system's event distribution.
 *
 * @author Cliff Biffle
 * @since 10.0
 */
public class DeadEvent {

    @Mock
    Configuration config;

    private static boolean handlerRegistered = false;

    // Register SMB URL handler once for all tests
    @BeforeAll
    static void registerSmbHandler() {
        if (!handlerRegistered) {
            try {
                // Try to register the handler factory
                URL.setURLStreamHandlerFactory(new URLStreamHandlerFactory() {
                    @Override

     */
    public DefaultCorsHandler() {
        super();
    }

    /**
     * Registers this CORS handler with the factory for configured allowed origins.
     * This method is automatically called after bean initialization.
     */
    @PostConstruct
    public void register() {
        final CorsHandlerFactory factory = ComponentUtil.getCorsHandlerFactory();

        });
    }

    /**
     * Registers available roles and labels for use in web config forms.
     * Includes role types, label types, and label setting configuration.
     *
     * @param data the render data to register the roles and labels with
     */
    protected void registerRolesAndLabels(final RenderData data) {

 * parameter, the object containing the method will not be able to register for event delivery from
 * the {@link EventBus}.
 *
 * <p>Unless also annotated with @{@link AllowConcurrentEvents}, event subscriber methods will be
 * invoked serially by each event bus that they are registered with.
 *
 * @author Cliff Biffle
 * @since 10.0
 */
@Retention(RetentionPolicy.RUNTIME)

            RenderDataUtil.register(data, "appendHighlightParams", appendHighlightParams);
            RenderDataUtil.register(data, "execTime", execTime);
            RenderDataUtil.register(data, "pageSize", pageSize);
            RenderDataUtil.register(data, "currentPageNumber", currentPageNumber);
            RenderDataUtil.register(data, "allRecordCount", allRecordCount);

            super();
        }

        /**
         * Registers the render data.
         * @param data The render data.
         */
        public void register(final RenderData data) {
            RenderDataUtil.register(data, "queryId", queryId);
            RenderDataUtil.register(data, "documentItems", documentItems);
            RenderDataUtil.register(data, "facetResponse", facetResponse);

        itemList.add(createItem(ComponentUtil.getMessageManager().getMessage(locale, "labels.file_auth_scheme_ftp"), Constants.FTP));
        RenderDataUtil.register(data, "protocolSchemeItems", itemList);
    }

    /**
     * Registers file configuration items for the dropdown list.
     *
     * @param data the render data
     */
    protected void registerFileConfigItems(final RenderData data) {