| Interface | Description | 
|---|---|
| AsyncResult<T> | 
 Encapsulates the result of an asynchronous operation. 
 | 
| Closeable | 
 A closeable resource. 
 | 
| CompositeFuture | 
 The composite future wraps a list of  
futures, it is useful when several futures
 needs to be coordinated. | 
| Context | 
 The execution context of a  
Handler execution. | 
| Future<T> | 
 Represents the result of an action that may, or may not, have occurred yet. 
 | 
| Handler<E> | 
 A generic event handler. 
 | 
| MultiMap | 
 This class represents a MultiMap of String keys to a List of String values. 
 | 
| Promise<T> | 
 Represents the writable side of an action that may, or may not, have occurred yet. 
 | 
| TimeoutStream | 
 A timeout stream is triggered by a timer, the  
Handler will be call when the timer is fired,
 it can be once or several times depending on the nature of the timer related to this stream. | 
| Verticle | 
 A verticle is a piece of code that can be deployed by Vert.x. 
 | 
| Vertx | 
 The entry point into the Vert.x Core API. 
 | 
| WorkerExecutor | 
 An executor for executing blocking code in Vert.x . 
 | 
| Class | Description | 
|---|---|
| AbstractVerticle | 
 An abstract base class that you can extend to write your own Verticle classes. 
 | 
| DeploymentOptions | 
 Options for configuring a verticle deployment. 
 | 
| DeploymentOptionsConverter | 
 Converter and mapper for  
DeploymentOptions. | 
| Launcher | 
 A  
main() class that can be used to create Vert.x instance and deploy a verticle, or run a bare Vert.x instance. | 
| ServiceHelper | 
 A helper class for loading factories from the classpath. 
 | 
| VertxOptions | 
 Instances of this class are used to configure  
Vertx instances. | 
| VertxOptionsConverter | 
 Converter and mapper for  
VertxOptions. | 
| Exception | Description | 
|---|---|
| VertxException | 
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