# Description
Adds the OPC UA NodeManagement service set (AddNodes / DeleteNodes /
AddReferences / DeleteReferences) to the server SDK and fixes a
long-standing shutdown bug where `NodeState.Delete` callbacks never
fired on address-space teardown.
### NodeManagement service set (#3736)
- New optional `INodeManagementAsyncNodeManager` facet interface (added
to `INodeManager.cs` alongside other facets, discovered via `as`,
**not** part of the `IAsyncNodeManager` composite). Opt-in per
NodeManager via `AllowNodeManagement` — default is `false` so existing
NodeManagers preserve binary compatibility.
- Dispatcher in `MasterNodeManager` routes:
- **AddNodes** by `RequestedNewNodeId.NamespaceIndex` when supplied,
otherwise to the parent's owning NodeManager. When the parent's owner is
read-only (e.g. `ObjectsFolder` owned by `CoreNodeManager`), the
dispatcher falls back to the first opted-in NodeManager so conformance
flows work out of the box.
- **DeleteNodes** / **AddReferences** / **DeleteReferences** to the
owning NodeManager of the target or source node, returning
`BadUserAccessDenied` when that NodeManager has not opted in.
Cross-NodeManager `AddReference` / `DeleteReference` best-effort mirrors
the inverse edge on the target's NodeManager.
- `AsyncCustomNodeManager` provides a default implementation: per-item
validation, `RequestedNewNodeId` honored, browse-name dedup for both
local and cross-NodeManager parents, `DeleteTargetReferences` semantics,
and a NodeId allocator fallback when an `INodeIdFactory.New` override
returns a null `NodeId` (e.g. parent-based hierarchical naming with no
parent attached).
- `StandardServer` adds the four service overrides plumbed through
`OperationLimits.MaxNodesPerNodeManagement`, audit events, and
`OnRequestComplete`; new `ReportAuditAddReferencesEvent` /
`ReportAuditDeleteReferencesEvent` helpers in `AuditEvents`.
- Quickstarts `ReferenceNodeManager` opts in via `AllowNodeManagement =>
true`; the legacy partial-class override in
`ReferenceServer.NodeManagement.cs` is removed.
### `NodeState.Delete` on shutdown (#3762)
- `CustomNodeManager.DeleteAddressSpace` and
`AsyncCustomNodeManager.DeleteAddressSpaceAsync` now snapshot root
`PredefinedNodes` (skipping children whose parent is in the snapshot to
prevent double-fire), invoke `NodeState.Delete(SystemContext)` on each
root (which recurses into children and raises `OnBeforeDelete` /
`OnAfterDelete` / `NodeStateChangeMasks.Deleted`), and then clear the
map.
- Derived overrides in Quickstarts `ReferenceNodeManager`,
`SampleNodeManager`, and `FileSystemNodeManager` chain to `base` so the
callback fires for their nodes too.
### Tests
- **21 new dispatcher unit tests** in
`Tests/Opc.Ua.Server.Tests/NodeManager/AsyncCustomNodeManagerNodeManagementTests.cs`
covering `AllowNodeManagement` default/opt-in, AddNode validation
(`BadBrowseNameInvalid`, `BadParentNodeIdInvalid`, `BadNodeIdRejected`,
`BadNodeIdExists`, `BadBrowseNameDuplicated`, `BadNodeClassInvalid`),
RequestedNewNodeId paths, DeleteNode + `DeleteTargetReferences`,
AddReference duplicate detection (`BadDuplicateReferenceNotAllowed`),
and DeleteReference (`BadNoMatch`).
- **2 new DeleteAddressSpaceAsync tests** in
`AsyncCustomNodeManagerTests` verifying `NodeState.Delete` invocation
and no double-fire on children.
- Updated InformationModel
`NodeManagementAddRefTests.AddReferenceBetweenExistingNodesSucceedsAsync`
to accept `BadUserAccessDenied` / `BadNotSupported` when the source NM
has opted out.
- **Full `Opc.Ua.Server.Tests` on net10.0: 1709 passed, 0 failed.**
- **All 26 InformationModel `Category=NodeManagement` conformance tests
pass** against the reference server (1 skipped where source NM opts
out).
### Docs
- New [`Docs/NodeManagement.md`](Docs/NodeManagement.md) with
architecture, opt-in pattern, dispatch and routing rules,
request-handling table, error-code table, audit events, and
custom-behavior examples.
- `Docs/MigrationGuide.md` gets two new sections — *NodeManagement
service set* (downstream migration steps) and *DeleteAddressSpace
invokes NodeState.Delete (#3762)* (shutdown behavior change) — with TOC
entries.
- `Docs/README.md` links the new `NodeManagement.md`.
## Related Issues
- Fixes#3736
- Fixes#3762
## Checklist
_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._
- [ ] I have signed the
[CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf)
and read the
[CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md)
doc.
- [x] I have added tests that prove my fix is effective or that my
feature works and increased code coverage.
- [x] I have added all necessary documentation.
- [x] I have verified that my changes do not introduce (new) build or
analyzer warnings.
- [ ] I ran **all** tests locally using the **UA.slnx** solution against
at least .net **framework** and .net **10**, and all passed.
- [ ] I fixed **all** failing and flaky tests in the CI pipelines and
**all** CodeQL warnings.
- [ ] I have addressed **all** PR feedback received.
## Proposed changes
This PR updates the server monitored-item pipeline to be
`IAsyncNodeManager`-aware and introduces channel-based FIFO queueing in
the monitored-node path to improve behavior under load.
It also includes follow-up fixes from review/CI feedback:
- Adjusted
`AsyncCustomNodeManagerTests.WriteAsync_PublishesValueToMonitoredItemQueueAsync`
to account for channel-based delivery timing/coalescing while still
asserting the written value is observed.
- Merged latest `master` into this branch and resolved merge conflicts
(notably in `ConfigurationNodeManager`), keeping async address-space
lookup behavior intact.
- Applied small compile-safety corrections needed for successful
validation.
## Proposed changes
Reduces sync-over-async in non-obsolete server APIs, removes stale
`#region/#endregion` noise from the test suite, and fixes analyzer/test
fallout from merging the Part 11 Historical Access framework (#3797).
Follow-up review feedback is included: `FileSystemNodeManager` is now
based on `AsyncCustomNodeManager`.
### Sync-over-async reduction (~24 `GetAwaiter().GetResult()` sites)
**Server-side:**
- `TrustList`: async `OnCallAsync` handlers added; sync `OnCall`
handlers retained as compat shims so legacy `CustomNodeManager2`
subclasses that host the TrustList but do not implement
`ICallAsyncNodeManager` keep working through `MethodState.Call`.
- `GDS ApplicationsNodeManager`: `RequestAccessToken`,
`KeyCredentialStart/FinishRequest`, and `Revoke` moved to `OnCallAsync`.
- `IKeyCredentialRequestStore`: interface + in-memory implementation
converted to async; `FinishKeyCredentialRequestResult` record carries
the previous out-set. Tests in `Tests/Opc.Ua.Gds.Tests/` updated to the
new async API.
- `FileSystem`:
- `DirectoryObjectState` methods (`CreateDirectory` / `CreateFile` /
`Delete` / `MoveOrCopy`) use `OnCallAsync`.
- `FileSystemNodeManager` now derives from `AsyncCustomNodeManager` and
overrides async address-space/node-resolution paths
(`CreateAddressSpaceAsync`, `DeleteAddressSpaceAsync`,
`GetManagerHandleAsync`, `ValidateNodeAsync`) to avoid sync-over-async
in dynamic node validation.
- `FileSystemNodeManagerFactory` now supports async creation
(`IAsyncNodeManagerFactory`) while retaining sync factory compatibility.
- Reference server registration of the FileSystem node manager is
aligned to the async node manager list.
- `ConfigurationNodeManager` namespace lookup uses sync
`GetManagerHandle` to keep the remaining `GetResult` inside the
documented `SyncNodeManagerAdapter` bridge.
- `ServerBase`: new `OnServerStartingAsync`; `StartAsync` now awaits it.
- `StandardServer.CreateMasterNodeManagerAsync` added; sync wrapper kept
for backward compatibility.
- `IServerInternal.CloseSession` marked `[Obsolete]`
(`CloseSessionAsync` exists).
- `IMasterNodeManager.RemoveReferences` marked `[Obsolete]`; in-tree
sync callers remain with scoped `CS0618` pragmas + TODO.
**Stack:**
- `EncryptedSecret`: added `VerifyHeaderForEccAsync` / `DecryptAsync` /
`TryDecryptAsync`; `UserNameIdentityTokenHandler.DecryptAsync` awaits
ECC validation.
- `CertificatePasswordProvider` ctor: `GetResult` fallback replaced with
explicit `InvalidOperationException`.
### Code-style and post-merge cleanup
- Removed unused `#region`/`#endregion` directives across test files.
- Restored green build state after Part 11 merge fallout fixes
(production + analyzer + test cleanup from earlier commits in this PR).
### CI / validation notes
- This PR branch surfaced runtime regressions introduced by Part 11
after the build-breaker was fixed (outside scope of this
async/code-style cleanup).
- Follow-up feedback change validation for `FileSystemNodeManager`:
- `dotnet build Libraries/Opc.Ua.Server/Opc.Ua.Server.csproj -f net10.0
--no-restore` ✅
- `dotnet test Tests/Opc.Ua.Server.Tests/Opc.Ua.Server.Tests.csproj -f
net10.0 --filter FileSystemNodeIdTests` ✅
- `dotnet test Tests/Opc.Ua.History.Tests/Opc.Ua.History.Tests.csproj -f
net10.0 --filter FileSystemSmokeTests` ✅ (test skipped in environment)
## Related Issues
- None.
## Types of changes
- [ ] Bugfix (non-breaking change which fixes an issue)
- [x] Enhancement (non-breaking change which adds functionality)
- [x] Test enhancement (non-breaking change to increase test coverage)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected, requires version increase of
Nuget packages)
- [ ] Documentation Update (if none of the other choices apply)
## Checklist
- [x] I have read the
[CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md)
doc.
- [x] I have signed the
[CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf).
- [x] I ran tests locally with my changes, all passed.
- [ ] I fixed all failing tests in the CI pipelines.
- [ ] I fixed all introduced issues with CodeQL and LGTM.
- [x] I have added tests that prove my fix is effective or that my
feature works and increased code coverage.
- [x] I have added necessary documentation (if appropriate).
- [x] Any dependent changes have been merged and published in downstream
modules.
* Add SessionActivated notification to invalidate permission caches on identity change
* Fix code review: rename test methods to PascalCase, use default instead of new ValueTask()
* Improve comment clarity in AsyncCustomNodeManager.SessionActivatedAsync
* Add integration test for permission re-evaluation after TransferSubscriptions + ActivateSession
* Replace integration test to use restricted RolePermissions node and verify permission denial after re-activation
* Extract HasDataChangeNotificationForClientHandle helper to reduce duplication
* Use Interfaces Introduced with 1.5.378
Refactor to use interfaces for node managers and server
Replaced concrete types with interfaces (e.g., IMasterNodeManager, ICoreNodeManager, IDiagnosticsNodeManager, IConfigurationNodeManager, IServerBase) across method signatures, properties, and internal structures to improve abstraction and flexibility.
* Refactor CoreNodeManager to be Based on CustomNodeManager2
* Add Test
* Add INodeManager3 with role permission validation
Introduce INodeManager3 interface extending INodeManager2, adding synchronous role permission validation methods. Update all node manager interfaces and classes to use INodeManager3. Extend IAsyncNodeManager with async permission validation methods and update adapters for sync/async bridging. Deprecate FindNodeInAddressSpace in favor of new async FindNodeInAddressSpaceAsync. Refactor MonitoredNode2 to use thread-safe collections and locking for monitored items. Enhance event reporting with security and permission checks. Update constructors and documentation to reflect new interfaces and best practices.
* fix comment
* fix
* Use Interfaces Introduced with 1.5.378
Refactor to use interfaces for node managers and server
Replaced concrete types with interfaces (e.g., IMasterNodeManager, ICoreNodeManager, IDiagnosticsNodeManager, IConfigurationNodeManager, IServerBase) across method signatures, properties, and internal structures to improve abstraction and flexibility.
* [Server] Refactor CoreNodeManager to be based on CustomNodeManager2 (#3552)
* Refactor CoreNodeManager to be Based on CustomNodeManager2
* Add Test
* Revert "[Server] Refactor CoreNodeManager to be based on CustomNodeManager2 (#3552)"
This reverts commit bb1d868c81.
This pull request modernizes the OPC UA .NET codebase and tests, removes .NET Standard 2.0 support from certificate/security code, and updates test code to use C# 12 and .NET 8+ features for clarity and maintainability.
- Certificate and BouncyCastle interop files (e.g., CertificateBuilder.cs, X509Extensions.cs, X509SignatureFactory.cs) are refactored to drop NETSTANDARD2_0 support and use modern .NET APIs and conditional compilation.
- Test code across the codebase is updated to use default, strongly-typed Parse methods, collection expressions, and improved async/await patterns.
- Exception handling and assertions in tests are modernized, and test method naming is made consistent with Async suffixes.
- The project and build files are updated to clarify Roslynator analyzer usage and remove obsolete netstandard tags.
- General code and test cleanup includes improved null safety, type safety, and removal of deprecated or unused code.
Marc Schier