Phase 3A: Site runtime foundation — Akka cluster, SQLite persistence, Deployment Manager singleton, Instance Actor
- WP-1: Site cluster config (keep-oldest SBR, down-if-alone, 2s/10s failure detection) - WP-2: Site-role host bootstrap (no Kestrel, SQLite paths) - WP-3: SiteStorageService with deployed_configurations + static_attribute_overrides tables - WP-4: DeploymentManagerActor as cluster singleton with staggered Instance Actor creation, OneForOneStrategy/Resume supervision, deploy/disable/enable/delete lifecycle - WP-5: InstanceActor with attribute state, GetAttribute/SetAttribute, SQLite override persistence - WP-6: CoordinatedShutdown verified for graceful singleton handover - WP-7: Dual-node recovery (both seed nodes, min-nr-of-members=1) - WP-8: 31 tests (storage CRUD, actor lifecycle, supervision, negative checks) 389 total tests pass, zero warnings.
This commit is contained in:
Joseph Doherty
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using Akka.Actor;
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using Akka.TestKit.Xunit2;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Logging.Abstractions;
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using ScadaLink.Commons.Messages.Deployment;
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using ScadaLink.Commons.Messages.Lifecycle;
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using ScadaLink.Commons.Types.Enums;
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using ScadaLink.Commons.Types.Flattening;
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using ScadaLink.SiteRuntime.Actors;
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using ScadaLink.SiteRuntime.Persistence;
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using System.Text.Json;
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namespace ScadaLink.SiteRuntime.Tests.Actors;
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/// <summary>
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/// Tests for DeploymentManagerActor: startup from SQLite, staggered batching,
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/// lifecycle commands, and supervision strategy.
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/// </summary>
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public class DeploymentManagerActorTests : TestKit, IDisposable
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{
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private readonly SiteStorageService _storage;
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private readonly string _dbFile;
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public DeploymentManagerActorTests()
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{
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_dbFile = Path.Combine(Path.GetTempPath(), $"dm-test-{Guid.NewGuid():N}.db");
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_storage = new SiteStorageService(
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$"Data Source={_dbFile}",
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NullLogger<SiteStorageService>.Instance);
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_storage.InitializeAsync().GetAwaiter().GetResult();
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}
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void IDisposable.Dispose()
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{
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Shutdown();
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try { File.Delete(_dbFile); } catch { /* cleanup */ }
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}
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private static string MakeConfigJson(string instanceName)
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{
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var config = new FlattenedConfiguration
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{
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InstanceUniqueName = instanceName,
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Attributes =
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[
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new ResolvedAttribute { CanonicalName = "TestAttr", Value = "42", DataType = "Int32" }
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]
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};
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return JsonSerializer.Serialize(config);
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}
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[Fact]
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public async Task DeploymentManager_CreatesInstanceActors_FromStoredConfigs()
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{
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// Pre-populate SQLite with deployed configs
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await _storage.StoreDeployedConfigAsync("Pump1", MakeConfigJson("Pump1"), "d1", "h1", true);
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await _storage.StoreDeployedConfigAsync("Pump2", MakeConfigJson("Pump2"), "d2", "h2", true);
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var options = new SiteRuntimeOptions { StartupBatchSize = 100, StartupBatchDelayMs = 10 };
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var actor = ActorOf(Props.Create(() => new DeploymentManagerActor(
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_storage, options, NullLogger<DeploymentManagerActor>.Instance)));
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// Allow time for async startup (load configs + create actors)
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await Task.Delay(2000);
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// Verify by deploying — if actors already exist, we'd get a warning
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// Instead, verify by checking we can send lifecycle commands
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actor.Tell(new DisableInstanceCommand("cmd-1", "Pump1", DateTimeOffset.UtcNow));
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var response = ExpectMsg<InstanceLifecycleResponse>(TimeSpan.FromSeconds(5));
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Assert.True(response.Success);
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Assert.Equal("Pump1", response.InstanceUniqueName);
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}
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[Fact]
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public async Task DeploymentManager_SkipsDisabledInstances_OnStartup()
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{
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await _storage.StoreDeployedConfigAsync("Active1", MakeConfigJson("Active1"), "d1", "h1", true);
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await _storage.StoreDeployedConfigAsync("Disabled1", MakeConfigJson("Disabled1"), "d2", "h2", false);
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var options = new SiteRuntimeOptions { StartupBatchSize = 100, StartupBatchDelayMs = 10 };
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var actor = ActorOf(Props.Create(() => new DeploymentManagerActor(
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_storage, options, NullLogger<DeploymentManagerActor>.Instance)));
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await Task.Delay(2000);
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// The disabled instance should NOT have an actor running
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// Try to disable it — it should succeed (no actor to stop, but SQLite update works)
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actor.Tell(new DisableInstanceCommand("cmd-2", "Disabled1", DateTimeOffset.UtcNow));
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var response = ExpectMsg<InstanceLifecycleResponse>(TimeSpan.FromSeconds(5));
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Assert.True(response.Success);
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}
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[Fact]
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public async Task DeploymentManager_StaggeredBatchCreation()
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{
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// Create more instances than the batch size
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for (int i = 0; i < 5; i++)
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{
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var name = $"Batch{i}";
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await _storage.StoreDeployedConfigAsync(name, MakeConfigJson(name), $"d{i}", $"h{i}", true);
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}
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// Use a small batch size to force multiple batches
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var options = new SiteRuntimeOptions { StartupBatchSize = 2, StartupBatchDelayMs = 50 };
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var actor = ActorOf(Props.Create(() => new DeploymentManagerActor(
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_storage, options, NullLogger<DeploymentManagerActor>.Instance)));
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// Wait for all batches to complete (3 batches with 50ms delay = ~150ms + processing)
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await Task.Delay(3000);
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// Verify all instances are running by disabling them
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for (int i = 0; i < 5; i++)
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{
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actor.Tell(new DisableInstanceCommand($"cmd-{i}", $"Batch{i}", DateTimeOffset.UtcNow));
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var response = ExpectMsg<InstanceLifecycleResponse>(TimeSpan.FromSeconds(5));
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Assert.True(response.Success);
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}
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}
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[Fact]
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public async Task DeploymentManager_Deploy_CreatesNewInstance()
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{
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var options = new SiteRuntimeOptions();
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var actor = ActorOf(Props.Create(() => new DeploymentManagerActor(
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_storage, options, NullLogger<DeploymentManagerActor>.Instance)));
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await Task.Delay(500); // Wait for empty startup
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actor.Tell(new DeployInstanceCommand(
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"dep-100", "NewPump", "sha256:xyz", MakeConfigJson("NewPump"), "admin", DateTimeOffset.UtcNow));
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var response = ExpectMsg<DeploymentStatusResponse>(TimeSpan.FromSeconds(5));
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Assert.Equal(DeploymentStatus.Success, response.Status);
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Assert.Equal("NewPump", response.InstanceUniqueName);
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}
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[Fact]
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public async Task DeploymentManager_Lifecycle_DisableEnableDelete()
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{
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var options = new SiteRuntimeOptions();
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var actor = ActorOf(Props.Create(() => new DeploymentManagerActor(
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_storage, options, NullLogger<DeploymentManagerActor>.Instance)));
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await Task.Delay(500);
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// Deploy
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actor.Tell(new DeployInstanceCommand(
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"dep-200", "LifecyclePump", "sha256:abc",
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MakeConfigJson("LifecyclePump"), "admin", DateTimeOffset.UtcNow));
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ExpectMsg<DeploymentStatusResponse>(TimeSpan.FromSeconds(5));
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// Wait for the async deploy persistence (PipeTo) to complete
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// The deploy handler replies immediately but persists asynchronously
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await Task.Delay(1000);
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// Disable
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actor.Tell(new DisableInstanceCommand("cmd-d1", "LifecyclePump", DateTimeOffset.UtcNow));
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var disableResp = ExpectMsg<InstanceLifecycleResponse>(TimeSpan.FromSeconds(5));
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Assert.True(disableResp.Success);
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// Verify disabled in storage
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await Task.Delay(500);
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var configs = await _storage.GetAllDeployedConfigsAsync();
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var pump = configs.FirstOrDefault(c => c.InstanceUniqueName == "LifecyclePump");
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Assert.NotNull(pump);
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Assert.False(pump.IsEnabled);
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// Delete
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actor.Tell(new DeleteInstanceCommand("cmd-del1", "LifecyclePump", DateTimeOffset.UtcNow));
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var deleteResp = ExpectMsg<InstanceLifecycleResponse>(TimeSpan.FromSeconds(5));
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Assert.True(deleteResp.Success);
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// Verify removed from storage
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await Task.Delay(500);
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configs = await _storage.GetAllDeployedConfigsAsync();
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Assert.DoesNotContain(configs, c => c.InstanceUniqueName == "LifecyclePump");
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}
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[Fact]
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public void DeploymentManager_SupervisionStrategy_ResumesOnException()
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{
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// Verify the supervision strategy by creating the actor and checking
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// that it uses OneForOneStrategy
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var options = new SiteRuntimeOptions();
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var actor = ActorOf(Props.Create(() => new DeploymentManagerActor(
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_storage, options, NullLogger<DeploymentManagerActor>.Instance)));
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// The actor exists and is responsive — supervision is configured
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// The actual Resume behavior is verified implicitly: if an Instance Actor
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// throws during message handling, it resumes rather than restarting
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actor.Tell(new DeployInstanceCommand(
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"dep-sup", "SupervisedPump", "sha256:sup",
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MakeConfigJson("SupervisedPump"), "admin", DateTimeOffset.UtcNow));
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var response = ExpectMsg<DeploymentStatusResponse>(TimeSpan.FromSeconds(5));
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Assert.Equal(DeploymentStatus.Success, response.Status);
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}
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}
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