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Added a sample program to test concurrent subscribers (#13)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using FluentAssertions; | ||
| using LiquidProjections; | ||
| using LiquidProjections.Abstractions; | ||
| using LiquidProjections.PollingEventStore; | ||
|
|
||
| namespace SampleSubscriber | ||
| { | ||
| class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| // var adapter = new PollingEventStoreAdapter(new PassiveEventStore(), 0, 5.Seconds(), 1000, () => DateTime.UtcNow, messageFunc => Console.WriteLine(messageFunc())); | ||
| var adapter = new PollingEventStoreAdapter(new PassiveEventStore(), 0, 5.Seconds(), 1000, () => DateTime.UtcNow); | ||
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| int maxSubscrbiers = 5; | ||
|
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| for (int id = 0; id < maxSubscrbiers; id++) | ||
| { | ||
| int localId = id; | ||
| adapter.Subscribe(0, new Subscriber | ||
| { | ||
| HandleTransactions = (transactions, info) => | ||
| { | ||
| Console.WriteLine( | ||
| $"Subscriber {info.Id} received transactions {transactions.First().Checkpoint} to {transactions.Last().Checkpoint} on thead {Thread.CurrentThread.ManagedThreadId}"); | ||
| Thread.Sleep(500); | ||
| return Task.FromResult(0); | ||
| }, | ||
| NoSuchCheckpoint = info => Task.FromResult(0) | ||
| }, id.ToString()); | ||
|
|
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| Console.WriteLine($"Started subscriber {localId}"); | ||
| } | ||
|
|
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| Console.WriteLine("Press a key to shutdown"); | ||
| Console.ReadLine(); | ||
|
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| adapter.Dispose(); | ||
| } | ||
| } | ||
|
|
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| internal class PassiveEventStore : IPassiveEventStore | ||
| { | ||
| private const long MaxCheckpoint = 100000; | ||
|
|
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| public IEnumerable<Transaction> GetFrom(long? previousCheckpoint) | ||
| { | ||
| previousCheckpoint = previousCheckpoint ?? 0; | ||
| if (previousCheckpoint > MaxCheckpoint) | ||
| { | ||
| return new List<Transaction>(); | ||
| } | ||
|
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| var transactions = new List<Transaction>(); | ||
|
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| long firstCheckpoint = previousCheckpoint.Value + 1; | ||
|
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| for (long checkpoint = firstCheckpoint; checkpoint < firstCheckpoint + 1000 && checkpoint < MaxCheckpoint; checkpoint++) | ||
| { | ||
| transactions.Add(new Transaction | ||
| { | ||
| Checkpoint = checkpoint, | ||
| Events = new List<EventEnvelope>(), | ||
| Headers = new Dictionary<string, object>(), | ||
| Id = Guid.NewGuid().ToString(), | ||
| StreamId = Guid.NewGuid().ToString(), | ||
| TimeStampUtc = DateTime.UtcNow | ||
| }); | ||
| } | ||
|
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| Thread.Sleep(1000); | ||
|
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| return transactions; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,17 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>netcoreapp2.0</TargetFramework> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <ProjectReference Include="..\..\Src\LiquidProjections.PollingEventStore\LiquidProjections.PollingEventStore.csproj" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Reference Include="FluentAssertions.Core, Version=4.19.3.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a"> | ||
| <HintPath>..\..\packages\FluentAssertions.4.19.3\lib\net45\FluentAssertions.Core.dll</HintPath> | ||
| </Reference> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <PackageReference Include="FluentAssertions" Version="5.3.2" /> | ||
| </ItemGroup> | ||
| </Project> |