Packages

  • package root
    Definition Classes
    root
  • package io
    Definition Classes
    root
  • package leonard
    Definition Classes
    io
  • package amqp

    Scala wrapper for interacting with AMQP, the aim is for convenient: - scala style usage - RPC calls - event hooks - reconnection strategies - message creation and extraction for common message types

    Scala wrapper for interacting with AMQP, the aim is for convenient: - scala style usage - RPC calls - event hooks - reconnection strategies - message creation and extraction for common message types

    Overview

    Build connections with io.leonard.amqp.ConnectionHolder.builder

    Create a connection:

    val connection = ConnectionHolder.builder("amqps://guest:password@host:port")
      .eventHooks(EventHooks(eventListener))
      .reconnectionStrategy(ReconnectionStrategy.JavaClientFixedReconnectDelay(1 second))
      .build()

    Create a channel:

    val channel = connection.newChannel()

    Create an RPC server listening on queue "queue.name", expecting a String and echoing it back:

    def rpcHandler(request: Message): Future[Message] = request match {
      case Message.String(string) => Future(Message.String(string))
    }
    val queue = QueueDeclare(Some("queue.name"))
    val rpcServerCloser = channel.rpcServer(queue, AckOnHandled)(rpcHandler)

    Create an RPC client method which sends requests to the queue "queue.name" with a response timeout of 10 seconds :

    val rpcClient = RPCClient(channel)
    val rpcMethod = rpcClient.newMethod(Exchange.Default.route("queue.name"), 10 second)

    Create a consumer on "queue.name" printing out strings sent to it:

    def consumer(request: Message): Unit = request match {
      case Message.String(string) => println(string)
    }
    val queue = QueueDeclare(Some("queue.name"))
    channel.addConsumer(queue, consumer)

    Send a message to "queue.name":

    channel.send(Exchange.Default.route("queue.name"), Message.String("message")
    Definition Classes
    leonard
  • package concurrent
    Definition Classes
    amqp
  • CancellableFuture
  • FutureTimeout
  • ScheduledExecutor

trait CancellableFuture[T] extends AnyRef

Wraps a future, adding a method to cancel it

T

return type of Future

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  1. abstract def cancel(mayInterruptIfRunning: Boolean): Boolean

    Attempts to cancel execution of this task.

    Attempts to cancel execution of this task. This attempt will fail if the task has already completed, has already been cancelled, or could not be cancelled for some other reason. If successful, and this task has not started when cancel is called, this task should never run. If the task has already started, then the mayInterruptIfRunning parameter determines whether the thread executing this task should be interrupted in an attempt to stop the task.

    If this method returns true, the future should never complete.

    mayInterruptIfRunning

    { @code true} if the thread executing this task should be interrupted; otherwise, in-progress tasks are allowed to complete

    returns

    { @code false} if the task could not be cancelled, typically because it has already completed normally; { @code true} otherwise

  2. abstract def future: Future[T]

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