Issue #24: create mxaccess com object on sta

2026-04-26 17:34:01 -04:00
parent 5511609880
commit 451dccf7e3
12 changed files with 607 additions and 13 deletions
@@ -0,0 +1,97 @@
+using System;
+using System.Runtime.InteropServices;
+using Google.Protobuf.WellKnownTypes;
+using MxGateway.Contracts.Proto;
+
+namespace MxGateway.Worker.MxAccess;
+
+public sealed class MxAccessSession : IDisposable
+{
+    private readonly object mxAccessComObject;
+    private readonly IMxAccessEventSink eventSink;
+    private bool disposed;
+
+    private MxAccessSession(
+        object mxAccessComObject,
+        IMxAccessEventSink eventSink,
+        int creationThreadId)
+    {
+        this.mxAccessComObject = mxAccessComObject ?? throw new ArgumentNullException(nameof(mxAccessComObject));
+        this.eventSink = eventSink ?? throw new ArgumentNullException(nameof(eventSink));
+        CreationThreadId = creationThreadId;
+    }
+
+    public int CreationThreadId { get; }
+
+    public WorkerReady CreateWorkerReady(int workerProcessId)
+    {
+        return new WorkerReady
+        {
+            WorkerProcessId = workerProcessId,
+            MxaccessProgid = MxAccessInteropInfo.ProgId,
+            MxaccessClsid = MxAccessInteropInfo.Clsid,
+            ReadyTimestamp = Timestamp.FromDateTime(DateTime.UtcNow),
+        };
+    }
+
+    public static MxAccessSession Create(
+        IMxAccessComObjectFactory factory,
+        IMxAccessEventSink eventSink)
+    {
+        if (factory is null)
+        {
+            throw new ArgumentNullException(nameof(factory));
+        }
+
+        if (eventSink is null)
+        {
+            throw new ArgumentNullException(nameof(eventSink));
+        }
+
+        object? mxAccessComObject = null;
+
+        try
+        {
+            mxAccessComObject = factory.Create();
+            if (mxAccessComObject is null)
+            {
+                throw new InvalidOperationException("MXAccess COM factory returned null.");
+            }
+
+            eventSink.Attach(mxAccessComObject);
+
+            return new MxAccessSession(
+                mxAccessComObject,
+                eventSink,
+                Environment.CurrentManagedThreadId);
+        }
+        catch (Exception exception)
+        {
+            eventSink.Detach();
+
+            if (mxAccessComObject is not null && Marshal.IsComObject(mxAccessComObject))
+            {
+                Marshal.FinalReleaseComObject(mxAccessComObject);
+            }
+
+            throw MxAccessCreationException.From(exception);
+        }
+    }
+
+    public void Dispose()
+    {
+        if (disposed)
+        {
+            return;
+        }
+
+        eventSink.Detach();
+
+        if (Marshal.IsComObject(mxAccessComObject))
+        {
+            Marshal.FinalReleaseComObject(mxAccessComObject);
+        }
+
+        disposed = true;
+    }
+}