io.leonard.amqp.EventHooks.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of amqp-scala-client_2.12 Show documentation

Scala wrapper for rabbitmq-java-client

The newest version!

package io.leonard.amqp

/**
 * Some basic strategies for handling events
 */
object EventHooks {
  /** Event hook delegating to function */
  def apply(f: Event ⇒ Unit): EventHooks = new EventHooks {
    override def event(event: Event): Unit = f(event)
  }

  /** Event hook delegating to partial function which ignores unhandled events */
  def apply(pf: PartialFunction[Event, Unit]): EventHooks = new EventHooks() {
    override def event(e: Event) =
      if (pf.isDefinedAt(e))
        pf(e)
  }

  /** No-op event hook */
  def apply(): EventHooks = new EventHooks {
    override def event(event: Event): Unit = ()
  }
}

trait EventHooks {
  def event(event: Event): Unit
}

sealed trait Event

object Event {

  sealed trait ConnectionEvent extends Event

  object ConnectionEvent {

    case object ConnectionShutdown extends ConnectionEvent
  }

  sealed trait ChannelEvent extends Event

  object ChannelEvent {

    /** Delivered when a channel is opened */
    case class ChannelOpened(channelNumber: Int, qos: Option[Int]) extends ChannelEvent

    /** Delivered when a channel is closed, there is information about what was closed, how and why available but we haven't investigated extracting it */
    case object ChannelShutdown extends ChannelEvent

    /* Delivered when a message is returned as undelivered */
    case class MessageReturned(replyCode: Int, replyText: String, exchange: String, routingKey: String, message: Message) extends ChannelEvent
  }

  sealed trait RPCServerEvent extends Event

  /** Delivered when the RPC server handler throws an exception or the handler future fails */
  case class HandlerError(e: Throwable) extends RPCServerEvent
}