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DeliveryDocSpecs.cs
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DeliveryDocSpecs.cs
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//-----------------------------------------------------------------------
// <copyright file="DeliveryDocSpecs.cs" company="Akka.NET Project">
// Copyright (C) 2009-2023 Lightbend Inc. <http://www.lightbend.com>
// Copyright (C) 2013-2023 .NET Foundation <https://github.com/akkadotnet/akka.net>
// </copyright>
//-----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Akka.Actor;
using Akka.Configuration;
using Akka.Delivery;
using Akka.Event;
using Akka.Persistence.Delivery;
using Akka.TestKit;
using Akka.TestKit.Xunit2;
using Akka.Util;
using Xunit;
using Xunit.Abstractions;
namespace DocsExamples.Delivery;
public class DeliveryDocSpecs : TestKit
{
private static readonly Config Config = @"
akka.reliable-delivery.consumer-controller.flow-control-window = 20
akka.persistence.journal.plugin = ""akka.persistence.journal.inmem""
akka.persistence.snapshot-store.plugin = ""akka.persistence.snapshot-store.inmem""
akka.persistence.journal.inmem.test-serialization = on # NOT IMPLEMENTED
akka.persistence.publish-plugin-commands = on
";
public DeliveryDocSpecs(ITestOutputHelper output) : base(Config, output: output)
{
}
[Fact]
public async Task ProducerController_and_ConsumerController_should_send_messages()
{
// <ProducerRegistration>
IActorRef producer = Sys.ActorOf(Props.Create(() => new ProducerActor()), "producer");
IActorRef producerController = Sys.ActorOf(ProducerController.Create<ICustomerProtocol>(Sys,
producerId: "producerController",
durableProducerQueue: Option<Props>.None));
producerController.Tell(new ProducerController.Start<ICustomerProtocol>(producer));
// </ProducerRegistration>
// <ConsumerRegistration>
TestProbe endProbe = CreateTestProbe();
// stop after 3 messages
IActorRef consumer = Sys.ActorOf(
Props.Create(() => new CustomerActor("customer1", endProbe, 3)), "consumer1");
IActorRef consumerController =
Sys.ActorOf(ConsumerController.Create<ICustomerProtocol>(Sys, Option<IActorRef>.None),
"consumerController");
consumerController.Tell(new ConsumerController.Start<ICustomerProtocol>(consumer));
consumerController.Tell(
new ConsumerController.RegisterToProducerController<ICustomerProtocol>(producerController));
// </ConsumerRegistration>
await endProbe.ExpectMsgAsync<List<string>>(TimeSpan.FromSeconds(10));
}
[Fact]
public async Task ProducerController_and_ConsumerController_should_send_messages_with_Chunking()
{
// <ChunkedProducerRegistration>
IActorRef producer = Sys.ActorOf(Props.Create(() => new ProducerActor()), "producer");
ProducerController.Settings settings = ProducerController.Settings.Create(Sys) with
{
ChunkLargeMessagesBytes = 10 // chunk messages into 10b segments
};
IActorRef producerController = Sys.ActorOf(ProducerController.Create<ICustomerProtocol>(Sys,
producerId: "producerController",
durableProducerQueue: Option<Props>.None,
settings: settings));
producerController.Tell(new ProducerController.Start<ICustomerProtocol>(producer));
// </ChunkedProducerRegistration>
TestProbe endProbe = CreateTestProbe();
// stop after 3 messages
IActorRef consumer = Sys.ActorOf(
Props.Create(() => new CustomerActor("customer1", endProbe, 3)), "consumer1");
IActorRef consumerController =
Sys.ActorOf(ConsumerController.Create<ICustomerProtocol>(Sys, Option<IActorRef>.None),
"consumerController");
consumerController.Tell(new ConsumerController.Start<ICustomerProtocol>(consumer));
consumerController.Tell(
new ConsumerController.RegisterToProducerController<ICustomerProtocol>(producerController));
await endProbe.ExpectMsgAsync<List<string>>(TimeSpan.FromSeconds(10));
}
[Fact]
public async Task ProducerController_and_ConsumerController_should_send_messages_with_EventSourcedProducerQueue()
{
// <DurableQueueProducer>
TestProbe producerProbe = CreateTestProbe();
Props eventSourcedProducerQueue =
EventSourcedProducerQueue.Create<ICustomerProtocol>(persistentId: "durableQueue-1", Sys);
IActorRef producerController = Sys.ActorOf(ProducerController.Create<ICustomerProtocol>(Sys,
producerId: "producerController",
durableProducerQueue: eventSourcedProducerQueue));
producerController.Tell(new ProducerController.Start<ICustomerProtocol>(producerProbe.Ref));
// </DurableQueueProducer>
TestProbe endProbe = CreateTestProbe();
// stop after 3 messages
IActorRef consumer = Sys.ActorOf(
Props.Create(() => new CustomerActor("customer1", endProbe, 3)), "consumer1");
IActorRef consumerController =
Sys.ActorOf(ConsumerController.Create<ICustomerProtocol>(Sys, Option<IActorRef>.None),
"consumerController");
consumerController.Tell(new ConsumerController.Start<ICustomerProtocol>(consumer));
consumerController.Tell(
new ConsumerController.RegisterToProducerController<ICustomerProtocol>(producerController));
// <ConfirmableMessages>
ProducerController.RequestNext<ICustomerProtocol> request1 = (await producerProbe.ExpectMsgAsync<ProducerController.RequestNext<ICustomerProtocol>>());
// confirm that message was stored in durable queue (so we know it will be redelivered if needed)
long seqNo1 = await request1.AskNextTo(new PurchaseItem("Burger"));
// </ConfirmableMessages>
ProducerController.RequestNext<ICustomerProtocol> request2 = (await producerProbe.ExpectMsgAsync<ProducerController.RequestNext<ICustomerProtocol>>());
// confirm that message was stored in durable queue (so we know it will be redelivered if needed)
long seqNo2 = await request2.AskNextTo(new PurchaseItem("Burger"));
ProducerController.RequestNext<ICustomerProtocol> request3 = (await producerProbe.ExpectMsgAsync<ProducerController.RequestNext<ICustomerProtocol>>());
// confirm that message was stored in durable queue (so we know it will be redelivered if needed)
long seqNo3 = await request1.AskNextTo(new PurchaseItem("Burger"));
await endProbe.ExpectMsgAsync<List<string>>(TimeSpan.FromSeconds(10));
}
// <MessageProtocol>
public interface ICustomerProtocol
{
}
public record PurchaseItem(string ItemName) : ICustomerProtocol;
// </MessageProtocol>
// <Consumer>
public sealed class CustomerActor : UntypedActor
{
private readonly ILoggingAdapter _log = Context.GetLogger();
private readonly string _customerId;
private readonly List<string> _purchasedItems = new();
private TestProbe _endProbe;
private readonly int _endMessages;
public CustomerActor(string customerId, TestProbe endProbe, int endMessages)
{
_customerId = customerId;
_endProbe = endProbe;
_endMessages = endMessages;
}
protected override void OnReceive(object message)
{
switch (message)
{
// <ConsumerDelivery>
case ConsumerController.Delivery<ICustomerProtocol> { Message: PurchaseItem purchase } delivery:
_purchasedItems.Add(purchase.ItemName);
_log.Info($"'{_customerId}' purchased '{purchase.ItemName}'");
delivery.ConfirmTo.Tell(ConsumerController.Confirmed.Instance);
// terminate after receiving enough messages
if (_purchasedItems.Count == _endMessages)
{
_endProbe.Tell(_purchasedItems);
Context.Stop(Self);
}
break;
// </ConsumerDelivery>
default:
Unhandled(message);
break;
}
}
}
// </Consumer>
// <Producer>
public sealed class ProducerActor : UntypedActor, IWithTimers, IWithStash
{
private readonly ILoggingAdapter _log = Context.GetLogger();
private static readonly IReadOnlyList<string> Items = new[]
{
"cheeseburger", "hamburger", "pizza", "cola", "fries", "ice cream"
};
private class Tick
{
private Tick()
{
}
public static Tick Instance { get; } = new();
}
protected override void PreStart()
{
Timers.StartPeriodicTimer("Tick", Tick.Instance, TimeSpan.FromSeconds(0.25));
}
// <ProducerDelivery>
protected override void OnReceive(object message)
{
switch (message)
{
case ProducerController.RequestNext<ICustomerProtocol> requestNext:
{
// deliver next item once timer Tick is received
Become(Active(requestNext.SendNextTo));
break;
}
case Tick:
{
// ignore;
break;
}
default:
Unhandled(message);
break;
}
}
// </ProducerDelivery>
private Receive Active(IActorRef sendNextTo)
{
return msg =>
{
switch (msg)
{
case Tick _:
{
var item = GetRandomItem();
_log.Info($"Producing item '{item}'");
// send this to the producer controller
sendNextTo.Tell(new PurchaseItem(item));
Stash.Unstash();
Become(OnReceive);
return true;
}
case ProducerController.RequestNext<ICustomerProtocol>:
Stash.Stash();
return true;
default:
return false;
}
};
}
private string GetRandomItem() => Items[ThreadLocalRandom.Current.Next(Items.Count)];
public ITimerScheduler Timers { get; set; }
public IStash Stash { get; set; }
}
// </Producer>
}