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Chapter 3. Features

3.1. New and Changed features
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This section describes the new functionalities introduced in this release. It also contains information about changes in the existing functionalities.

OpenJ9 images for IBM Z and IBM Power Systems have been deprecated. The following OpenJDK11 image has been updated to support multiple architectures:

  • ubi8/openjdk-11

You can use the OpenJDK11 image with the following architectures:

  • x86 (x86_64)
  • s390x (IBM Z)
  • ppc64le (IBM Power Systems)

Red Hat build of Eclipse Vert.x runs on a FIPS enabled RHEL system and uses FIPS certified libraries provided by RHEL.

From Eclipse Vert.x 4.1.0 onward, if there are headers in an HTTP redirect, then the HTTP client redirect handler propagates the headers to the next request. This change enables the redirect handler to have more control over the entire redirected request.

In earlier releases of Eclipse Vert.x, where there were redirected requests with headers, the HTTP client would handle the headers after the redirect.

The following example shows you how redirects are handled in Eclipse Vert.x 4.1.0: 

RequestOptions options = new RequestOptions();
options.setMethod(HttpMethod.GET);
options.setHost(uri.getHost());
options.setPort(port);
options.setSsl(ssl);
options.setURI(requestURI);

// From 4.1.0 propagate headers
options.setHeaders(resp.request().headers());
options.removeHeader(CONTENT_LENGTH);
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3.1.4. Upgrade to Infinispan 12
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In Eclipse Vert.x 4.1.0, the Infinispan cluster manager has been updated and is based on Infinispan 12.

Infinispan 11 had a bug, which did not allow storing of byte arrays in a multimap cache. As a wordaround, the Eclipse Vert.x cluster manager had to use an internal Infinispan class, WrappedBytes, to store eventbus subscription data. This issue has been fixed in Infinispan 12.

In Eclipse Vert.x 4.1.0, the JSON configuration options are applied even if a connection_string option is available.

The following configuration options are now applied: 

{
    mongo:{
        db_name: "mydb"
        connection_string: "mongodb://localhost:27017"
        maxPoolSize: 10
        minPoolSize: 3
    }
}
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In earlier releases of Eclipse Vert.x, the JSON configuration options were ignored when connection string was available. For example, consider the previous example. In earlier releases of Eclipse Vert.x, db_name, maxPoolSize, and minPoolSize options would have been ignored.

3.1.6. Removed the deprecated JWT options methods
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From Eclipse Vert.x 4.0 onward, the JWT and OAuth2 handlers are used to handle scopes.

From Eclipse Vert.x 4.1.0 onward, JWTOptions.setScopes(List<String>), JWTOptions.addScope(String) and JWTOptions.withScopeDelimiter(String) methods have been removed. These methods did not comply with the specification.

The following example shows you how to handle scopes in Eclipse Vert.x 4.1.0. 

// before 4.1.0
JWTAuthOptions authConfig = new JWTAuthOptions()
  .setJWTOptions(new JWTOptions()
    .addScope("a")
    .addScope("b")
    .withScopeDelimiter(" ")));

JWTAuth authProvider = JWTAuth.create(vertx, authConfig);

router.route("/protected/*").handler(JWTAuthHandler.create(authProvider));

// in 4.1.0
JWTAuth authProvider = JWTAuth.create(vertx, new JWTAuthOptions());

router.route("/protected/*").handler(
  JWTAuthHandler.create(authProvider)
    .addScope("a")
    .addScope("b")
    .withScopeDelimiter(" "));
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From Eclipse Vert.x 4.1.0, LoggerHandler.customFormatter(Function) method has been deprecated. The function takes as input an HttpServerRequest and returns a formatted log string. Because the output is a string, it is not possible to access the context.

Use the new method LoggerHandler customFormatter(LoggerFormatter formatter) instead. The method takes as input a custom formatter that gives access to the context.

3.1.8. New exception to handle HTTP failures
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From Eclipse Vert.x 4.1.0, a new exception class io.vertx.ext.web.handler.HttpException is available that can be used to handle HTTP failures. You can use the exception to specify custom status codes other than 500. For example, new HttpException(401, “Forbidden”) indicates that the requests that are forbidden should return status code 401.

3.1.9. Support for RxJava 3
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From Eclipse Vert.x 4.1.0, RxJava 3 is supported.

  • A new rxified API is available in the io.vertx.rxjava3 package.
  • Integration with Eclipse Vert.x JUnit5 is provided by the vertx-junit5-rx-java3 binding.

From Eclipse Vert.x 4.0.3, the ContextServerInterceptor.bind() method binds all types of data to the context. The method is more secure now as it does not expose the storage details.

In releases prior to Eclipse Vert.x 4.0.3, the method used to bind only 'String' data type to context. It also exposed the storage details.

To use the updated ContextServerInterceptor.bind() method, you must update your application.

The following example shows the code in releases prior to Eclipse Vert.x 4.0.3. 

// Example code from previous releases

class X extends ContextServerInterceptor {
  @Override
  public void bind(Metadata metadata, ConcurrentMap<String, String> context) {
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The following example shows the replacing code fpr Eclipse Vert.x 4.0.3 release. 

// Replacing code for Eclipse Vert.x 4.0.3 release

class X extends ContextServerInterceptor {
  @Override
  public void bind(Metadata metadata) {
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In releases prior to Eclipse Vert.x 4.0.3, if routes were defined with a path ending in slash and a wildcard /*, the routes would be called only if the matching request also included the ending slash /. This rule caused problems when the wildcard was empty.

From Eclipse Vert.x 4.0.3 onward, this rule is no longer applied. You can create routes whose paths end in a slash (/). However, it is not mandatory to specify the slash in the request URLs.

Also, you can create and use request URLs to call routes that end with wildcards in their path instead of slash (/). For example, routes with wildcard can be defined as /foo/*. Here the route has to match an open wildcard at the end of the path. The request URL can be /foo.

The table shows the behavior in Eclipse Vert.x 4.0.3 and previous releases when you send a request URL /foo/*. You can see that the ending slash is optional in Eclipse Vert.x 4.0.3 and request matches the route.

Expand
RouteEclipse Vert.x 4.0.3Releases prior to Eclipse Vert.x 4.0.3

/foo

Match

No Match

/foofighters

No Match

No Match

/foo/

Match

Match

/foo/bar

Match

Match

The autoRegistrationOfImporters attribute has been removed from service discovery options.

In releases prior to Eclipse Vert.x 4.0.3, the AuthenticationProvider.authenticate() method would incorrectly take jwt: someValue as input credentials.

From Eclipse Vert.x 4.0.3, the AuthenticationProvider.authenticate() method has been updated and takes token: someValue as input credentials. This change ensures that both JSON and typed APIs are consistent and can be used interchangeably.

The following code shows the implementation for the authenticate method in releases prior to Eclipse Vert.x 4.0.3. 

new JsonObject().put("jwt", "token...");
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The following code shows the implementation for the authenticate method in Eclipse Vert.x 4.0.3 release. 

new JsonObject().put("token", "token...");
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The PubSecKeyOptions.getBuffer() method returns the PEM or secret key buffer. In releases prior to Eclipse Vert.x 4.0.2, the key buffer was stored and returned as a String. However, it is recommended to save secrets as a Buffer. From Eclipse Vert.x 4.0.2 onward, the method stores and returns the key buffer as a Buffer. This change improves the security and handling of secrets.

The PubSecKeyOptions.setBuffer() method continues to accept a String argument. In the set method, an overload for Buffer has been added to safely handle non ASCII secret materials. This change does not require any change to the existing code.

From Eclipse Vert.x 4, the KubernetesServiceImporter discovery bridge is no longer registered automatically. Even if you have added the bridge in the classpath of your Maven project, it will not be automatically registered.

You must manually register the bridge after creating the ServiceDiscovery instance.

Eclipse Vert.x 4 uses futures for asynchronous operations. Every callback method has a corresponding future method.

Futures can be used to compose asynchronous operations. When you use futures, the error handling is better. Therefore, it is recommended to use a combination of callback and futures in your applications.

In Eclipse Vert.x 4, Jackson Databind is an optional Maven dependency. If you want to use this dependency, you must explicitly add it in the classpath. For example, if you are object mapping JSON, then you must explicitly add the dependency.

3.1.18. Handling deprecations and removals
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In Eclipse Vert.x 4, new enhanced features have been provided. The old features and functions have been deprecated or removed in Eclipse Vert.x 4. Before you migrate your applications to Eclipse Vert.x 4, check for deprecations and removals.

The Java compiler generates warnings when deprecated APIs are used. You can use the compiler to check for deprecated methods while migrating applications to Eclipse Vert.x 4.

3.1.19. Support for distributed tracing
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Eclipse Vert.x 4 supports distributed tracing. You can use tracing to monitor microservices and identify performance issues.

Eclipse Vert.x 4 integrates with OpenTracing system.

The following Eclipse Vert.x components can log traces:

  • HTTP server and HTTP client
  • Eclipse Vert.x SQL client
  • Eclipse Vert.x Kafka client
Important

Tracing is available as Technology Preview. Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend to use them for production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

See Technology Preview Features Support Scope on the Red Hat Customer Portal for information about the support scope for Technology Preview features.

In Eclipse Vert.x 4, the EventBus JavaScript client, vertx-web-client.js is not published as a Red Hat artifact in the Maven repository.

The client is published in the npm repository. You can access the client from the following location: @vertx/eventbus-bridge-client.js

Use the OpenShift Maven plugin to deploy your Eclipse Vert.x applications on OpenShift. The Fabric8 Maven plugin is no longer supported. For more information, see the section migrating from Fabric8 Maven Plugin to Eclipse JKube.

You can add metering labels to your Eclipse Vert.x pods and check Red Hat subscription details with the OpenShift Metering Operator.

Note
  • Do not add metering labels to any pods that an operator or a template deploys and manages.
  • You can apply labels to pods using the Metering Operator on OpenShift Container Platform version 4.8 and earlier. From version 4.9 onward, the Metering Operator is no longer available without a direct replacement.

Eclipse Vert.x should use the following metering labels:

  • com.company: Red_Hat
  • rht.prod_name: Red_Hat_Runtimes
  • rht.prod_ver: 2022-Q1
  • rht.comp: Vert.x
  • rht.comp_ver: 4.1.8
  • rht.subcomp: <leave_blank>
  • rht.subcomp_t: application

Eclipse Vert.x introduces support for building and deploying Eclipse Vert.x applications to OpenShift with OCI-compliant Universal Base Images for Red Hat OpenJDK 8 and Red Hat OpenJDK 11 on RHEL 8.

The RHEL 8 OpenJDK Universal Base Images replace the RHEL 8 OpenJDK builder images. The RHEL 8 OpenJDK base images are no longer supported for use with Eclipse Vert.x.

3.2. Deprecated features
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This section lists the functionalities deprecated or removed in this release.

  • HttpServerOptions

    Expand
    Removed methodsReplacing methods

    getMaxWebsocketFrameSize()

    getMaxWebSocketFrameSize()

    setMaxWebsocketFrameSize()

    setMaxWebSocketFrameSize()

    getMaxWebsocketMessageSize()

    getMaxWebSocketMessageSize()

    setMaxWebsocketMessageSize()

    setMaxWebSocketMessageSize()

    getPerFrameWebsocketCompressionSupported()

    getPerFrameWebSocketCompressionSupported()

    setPerFrameWebsocketCompressionSupported()

    setPerFrameWebSocketCompressionSupported()

    getPerMessageWebsocketCompressionSupported()

    getPerMessageWebSocketCompressionSupported()

    setPerMessageWebsocketCompressionSupported()

    setPerMessageWebSocketCompressionSupported()

    getWebsocketAllowServerNoContext()

    getWebSocketAllowServerNoContext()

    setWebsocketAllowServerNoContext()

    setWebSocketAllowServerNoContext()

    getWebsocketCompressionLevel()

    getWebSocketCompressionLevel()

    setWebsocketCompressionLevel()

    setWebSocketCompressionLevel()

    getWebsocketPreferredClientNoContext()

    getWebSocketPreferredClientNoContext()

    setWebsocketPreferredClientNoContext()

    setWebSocketPreferredClientNoContext()

    getWebsocketSubProtocols()

    getWebSocketSubProtocols()

    setWebsocketSubProtocols()

    setWebSocketSubProtocols()

  • Eclipse Vert.x Web

    Expand
    Removed elementsReplacing elements

    io.vertx.ext.web.Cookie

    io.vertx.core.http.Cookie

    io.vertx.ext.web.handler.CookieHandler

    io.vertx.core.http.Cookie

    io.vertx.ext.web.Locale

    io.vertx.ext.web.LanguageHeader

    RoutingContext.acceptableLocales()

    RoutingContext.acceptableLanguages()

    StaticHandler.create(String, ClassLoader)

    ---

    SessionHandler.setAuthProvider(AuthProvider)

    SessionHandler.addAuthProvider()

    HandlebarsTemplateEngine.getHandlebars()HandlebarsTemplateEngine.getResolvers()HandlebarsTemplateEngine.setResolvers()JadeTemplateEngine.getJadeConfiguration()ThymeleafTemplateEngine.getThymeleafTemplateEngine()ThymeleafTemplateEngine.setMode()

    TemplateEngine.unwrap()

  • Messaging

    Expand
    Removed methodsReplacing methods

    MessageProducer<T>.send(T)

    MessageProducer<T>.write(T)

    MessageProducer.send(T,Handler)

    EventBus.request(String,Object,Handler)

  • EventBus

    Expand
    Removed methodsReplacing methods

    EventBus.send(…​, Handler<AsyncResult<Message<T>>>)Message.reply(…​, Handler<AsyncResult<Message<T>>>)

    replyAndRequest

  • Handlers

    Expand
    Removed methodsReplacing methods

    Future<T>.setHandler()

    Future<T>.onComplete()Future<T>.onSuccess()Future<T>.onFailure()

    HttpClientRequest.connectionHandler()

    HttpClient.connectionHandler()

  • JSON

    Expand
    Removed Fields/MethodsNew methods

    Json.mapper() field

    DatabindCodec.mapper()

    Json.prettyMapper() field

    DatabindCodec.prettyMapper()

    Json.decodeValue(Buffer, TypeReference<T>)

    JacksonCodec.decodeValue(Buffer, TypeReference)

    Json.decodeValue(String, TypeReference<T>)

    JacksonCodec.decodeValue(String, TypeReference)

  • JUnit5

    Expand
    Deprecated methodsNew methods

    VertxTestContext.succeeding()

    VertxTestContext.succeedingThenComplete()

    VertxTestContext.failing()

    VertxTestContext.failingThenComplete()

  • Reactive Extensions (Rx)

    Expand
    Deprecated methodsNew methods

    WriteStreamSubscriber.onComplete()

    WriteStreamSubscriber.onWriteStreamEnd()WriteStreamSubscriber.onWriteStreamError()

  • Circuit breaker

    Expand
    Removed methodsReplacing methods

    CircuitBreaker.executeCommand()

    CircuitBreaker.execute()

    CircuitBreaker.executeCommandWithFallback()

    CircuitBreaker.executeWithFallback()

  • MQTT

    Expand
    Removed methodsReplacing methods

    MqttWill.willMessage()

    MqttWill.getWillMessage()

    MqttWill.willTopic()

    MqttWill.getWillTopic()

    MqttWill.willQos()

    MqttWill.getWillQos()

    MqttAuth.username()

    MqttAuth.getUsername()

    MqttAuth.password()

    MqttAuth.getPassword()

    MqttClientOptions.setKeepAliveTimeSeconds()

    MqttClientOptions.setKeepAliveInterval()

  • AMQP client

    Expand
    Removed methodsReplacing methods

    AmqpClient.createReceiver(String address, Handler<AmqpMessage> messageHandler, …​)

    AmqpClient createReceiver(String address, Handler<AsyncResult<AmqpReceiver>> completionHandler)

    AmqpConnection createReceiver(…​, Handler<AsyncResult<AmqpReceiver>> completionHandler)

    AmqpConnection createReceiver(String address, Handler<AsyncResult<AmqpReceiver>> completionHandler)

    AmqpConnection createReceiver(.., Handler<AmqpMessage> messageHandler, Handler<AsyncResult<AmqpReceiver>> completionHandler)

    AmqpConnection createReceiver(String address, Handler<AsyncResult<AmqpReceiver>> completionHandler)

  • Authentication and authorization

    Expand
    Removed elementsReplacing elements

    OAuth2Options.isUseBasicAuthorizationHeader()

    No replacing method

    OAuth2Options.setUseBasicAuthorizationHeader()

    No replacing method

    OAuth2Options.getClientSecretParameterName()

    No replacing method

    OAuth2Options.setClientSecretParameterName()

    No replacing method

    OAuth2Auth.createKeycloak()

    KeycloakAuth.create(vertx, JsonObject) ()

    OAuth2Auth.create(Vertx, OAuth2FlowType, OAuth2ClientOptions)()

    OAuth2Auth.create(vertx, new OAuth2ClientOptions().setFlow(YOUR_DESIRED_FLOW))

    OAuth2Auth.create(Vertx, OAuth2FlowType)

    OAuth2Auth.create(vertx, new OAuth2ClientOptions().setFlow(YOUR_DESIRED_FLOW))

    User.isAuthorised()

    User.isAuthorized()

    AccessToken.refreshToken()

    AccessToken.opaqueRefreshToken()

    io.vertx.ext.auth.jwt.JWTOptions data object

    io.vertx.ext.jwt.JWTOptions data object

    SecretOptions class

    PubSecKeyOptions class

    Expand
    Deprecated methodsReplacing methods

    OAuth2Auth.decodeToken()

    AuthProvider.authenticate()

    OAuth2Auth.introspectToken()

    AuthProvider.authenticate()

    OAuth2Auth.getFlowType()

    No replacing method

    OAuth2Auth.loadJWK()

    OAuth2Auth.jwkSet()

    Oauth2ClientOptions.isUseAuthorizationHeader()

    No replacing method

    Expand
    Deprecated classReplacing class

    AbstractUser

    Create user objects using the ` User.create(JsonObject)` method.

    AuthOptions

    No replacing class

    JDBCAuthOptions

    JDBCAuthenticationOptions for authentication and JDBCAuthorizationOptions for authorization

    JDBCHashStrategy

    No replacing class

    OAuth2RBAC

    AuthorizationProvider

    Oauth2Response

    Recommended to use WebClient class

    KeycloakHelper

    No replacing class

  • Service discovery

    Expand
    Removed methodsReplacing methods

    ServiceDiscovery.create(…​, Handler<ServiceDiscovery> completionHandler)

    ServiceDiscovery.create(Vertx)

    ServiceDiscovery.create(…​, Handler<ServiceDiscovery> completionHandler)

    ServiceDiscovery.create(Vertx, ServiceDiscoveryOptions)

  • Eclipse Vert.x configuration

    Expand
    Removed methodsReplacing methods

    ConfigRetriever.getConfigAsFuture()

    retriever.getConfig()

  • MongoDB client

    Expand
    Removed methodsReplacing methods

    MongoClient.update()

    MongoClient.updateCollection()

    MongoClient.updateWithOptions()

    MongoClient.updateCollectionWithOptions()

    MongoClient.replace()

    MongoClient.replaceDocuments()

    MongoClient.replaceWithOptions()

    MongoClient.replaceDocumentsWithOptions()

    MongoClient.remove()

    MongoClient.removeDocuments()

    MongoClient.removeWithOptions()

    MongoClient.removeDocumentsWithOptions()

    MongoClient.removeOne()

    MongoClient.removeDocument()

    MongoClient.removeOneWithOptions

    MongoClient.removeDocumentsWithOptions()

  • Clients with no shared data sources

    Expand
    Deprecated MethodsNew Methods

    MongoClient.createNonShared()

    MongoClient.create()

    JDBCClient.createNonShared()

    wJDBCClient.create()

    CassandraClient.createNonShared()

    CassandraClient.create()

    MailClient.createNonShared()

    MailClient.create()

  • Hook methods

    Expand
    Removed MethodsNew Methods

    Context.addCloseHook()

    No replacing method

    Context.removeCloseHook()

    No replacing method

  • Clone methods

    Expand
    Removed MethodsNew Methods

    KeyCertOptions.clone()

    KeyCertOptions.copy()

    TrustOptions.clone()

    TrustOptions.copy()

    SSLEngineOptions.clone()

    SSLEngineOptions.copy()

  • VertxOptions

    Expand
    Removed MethodsNew Methods

    VertxOptions.equals()

    No replacing method

    VertxOptions.hashCode()

    No replacing method

    VertxOptions.fileResolverCachingEnabled()

    FileSystemOptions.isFileCachingEnabled()

  • Pooled buffer

    Expand
    Removed MethodsNew Methods

    TCPSSLOptions.isUsePooledBuffers()

    No replacing method

    TCPSSLOptions.setUsePooledBuffers()

    No replacing method

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