From d7ca2b575777a6020443825eb5f4e6a5a3938238 Mon Sep 17 00:00:00 2001
From: campersau <buchholz.bastian@googlemail.com>
Date: Wed, 4 Mar 2026 08:44:26 +0100
Subject: [PATCH] Use typed exception for node not in swarm and node already in
 swarm

---
 .../DockerSwarmNodeAlreadyParticipatingException.cs      | 9 +++++++++
 .../DockerSwarmNodeNotParticipatingException.cs          | 9 +++++++++
 src/Docker.DotNet/Endpoints/SwarmOperations.cs           | 6 ++----
 test/Docker.DotNet.Tests/TestFixture.cs                  | 2 +-
 4 files changed, 21 insertions(+), 5 deletions(-)
 create mode 100644 src/Docker.DotNet/Endpoints/DockerSwarmNodeAlreadyParticipatingException.cs
 create mode 100644 src/Docker.DotNet/Endpoints/DockerSwarmNodeNotParticipatingException.cs

diff --git a/src/Docker.DotNet/Endpoints/DockerSwarmNodeAlreadyParticipatingException.cs b/src/Docker.DotNet/Endpoints/DockerSwarmNodeAlreadyParticipatingException.cs
new file mode 100644
index 00000000..0b6e76d4
--- /dev/null
+++ b/src/Docker.DotNet/Endpoints/DockerSwarmNodeAlreadyParticipatingException.cs
@@ -0,0 +1,9 @@
+namespace Docker.DotNet;
+
+public class DockerSwarmNodeAlreadyParticipatingException : DockerApiException
+{
+    public DockerSwarmNodeAlreadyParticipatingException(HttpStatusCode statusCode, string? responseBody)
+        : base(statusCode, responseBody)
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Docker.DotNet/Endpoints/DockerSwarmNodeNotParticipatingException.cs b/src/Docker.DotNet/Endpoints/DockerSwarmNodeNotParticipatingException.cs
new file mode 100644
index 00000000..678dc60b
--- /dev/null
+++ b/src/Docker.DotNet/Endpoints/DockerSwarmNodeNotParticipatingException.cs
@@ -0,0 +1,9 @@
+namespace Docker.DotNet;
+
+public class DockerSwarmNodeNotParticipatingException : DockerApiException
+{
+    public DockerSwarmNodeNotParticipatingException(HttpStatusCode statusCode, string? responseBody)
+        : base(statusCode, responseBody)
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/Docker.DotNet/Endpoints/SwarmOperations.cs b/src/Docker.DotNet/Endpoints/SwarmOperations.cs
index 8609a63e..6ff57d85 100644
--- a/src/Docker.DotNet/Endpoints/SwarmOperations.cs
+++ b/src/Docker.DotNet/Endpoints/SwarmOperations.cs
@@ -6,8 +6,7 @@ internal class SwarmOperations : ISwarmOperations
     {
         if (statusCode == HttpStatusCode.ServiceUnavailable)
         {
-            // TODO: Make typed error.
-            throw new Exception("Node is not part of a swarm.");
+            throw new DockerSwarmNodeNotParticipatingException(statusCode, responseBody);
         }
     };
 
@@ -15,8 +14,7 @@ internal class SwarmOperations : ISwarmOperations
     {
         if (statusCode == HttpStatusCode.ServiceUnavailable)
         {
-            // TODO: Make typed error.
-            throw new Exception("Node is already part of a swarm.");
+            throw new DockerSwarmNodeAlreadyParticipatingException(statusCode, responseBody);
         }
     };
 
diff --git a/test/Docker.DotNet.Tests/TestFixture.cs b/test/Docker.DotNet.Tests/TestFixture.cs
index 8005b89b..9f3c7280 100644
--- a/test/Docker.DotNet.Tests/TestFixture.cs
+++ b/test/Docker.DotNet.Tests/TestFixture.cs
@@ -93,7 +93,7 @@ await DockerClient.Images.CreateImageAsync(new ImagesCreateParameters { FromImag
 
             _hasInitializedSwarm = true;
         }
-        catch
+        catch (DockerSwarmNodeAlreadyParticipatingException)
         {
             this.LogInformation("Couldn't init a new swarm, the node should take part of an existing one.");