Values
`deliveryOptions` | `shared deliveryOptions deliveryOptions`
`eventBusOptions` | `shared eventBusOptions eventBusOptions`
`no_handlers` | `shared no_handlers no_handlers` The message send failed because no handlers were available to handle the message.
`recipient_failure` | `shared recipient_failure recipient_failure` The message send failed because the recipient actively sent back a failure (rejected the message)
`replyFailure` | `shared replyFailure replyFailure`
`timeout` | `shared timeout timeout` The message send failed because no reply was received before the timeout time.

Classes
`DeliveryOptions` | `shared DeliveryOptions` Delivery options are used to configure message delivery. Delivery options allow to configure delivery timeout and message codec name, and to provide any headers that you wish to send with the message.
`EventBus` | `shared EventBus` A Vert.x event-bus is a light-weight distributed messaging system which allows different parts of your application, or different applications and services to communicate with each in a loosely coupled way. An event-bus supports publish-subscribe messaging, point-to-point messaging and request-response messaging. Message delivery is best-effort and messages can be lost if failure of all or part of the event bus occurs. Please refer to the documentation for more information on the event bus.
`EventBusOptions` | `shared EventBusOptions` Options to configure the event bus.
`Message` | `shared Message<T>` Represents a message that is received from the event bus in a handler. Messages have a body, which can be null, and also headers, which can be empty. If the message was sent specifying a reply handler, it can be replied to using reply. If you want to notify the sender that processing failed, then fail can be called.
`MessageConsumer` | `shared MessageConsumer<T>` An event bus consumer object representing a stream of message to an EventBus address that can be read from. The consumer or localConsumer creates a new consumer, the returned consumer is not yet registered against the event bus. Registration is effective after the handler method is invoked. The consumer is unregistered from the event bus using the unregister method or by calling the handler with a null value..
`MessageProducer` | `shared MessageProducer<T>` Represents a stream of message that can be written to.
`ReplyFailure` | `shared abstract ReplyFailure` Represents the type of reply failure
`SendContext` | `shared SendContext<T>` Encapsulates a message being sent from Vert.x. Used with event bus interceptors
`deliveryOptions` | `shared deliveryOptions`
`eventBusOptions` | `shared eventBusOptions`
`no_handlers` | `shared no_handlers` The message send failed because no handlers were available to handle the message.
`recipient_failure` | `shared recipient_failure` The message send failed because the recipient actively sent back a failure (rejected the message)
`replyFailure` | `shared replyFailure`
`timeout` | `shared timeout` The message send failed because no reply was received before the timeout time.