889572472f
Convert DataValue from class to readonly struct for further GC relief ( #3796 )
...
Convert `DataValue` from a mutable reference type (`class`) to a `readonly struct` to eliminate per-allocation GC pressure on every attribute read, subscription publish, and history sample.
### Key API changes (user-visible)
| Before | After | Pattern |
|---|---|---|
| `class DataValue` | `readonly struct DataValue : INullable` | Foundation |
| `Equals(DataValue?)` / `operator ==(DataValue?, DataValue?)` | `Equals(DataValue)` / `operator ==(DataValue, DataValue)` | Value semantics |
| `IEncoder.WriteDataValue(string?, DataValue?)` | `IEncoder.WriteDataValue(string?, DataValue)` | Non-nullable wire API |
| `IDecoder.ReadDataValue(...) -> DataValue?` | `IDecoder.ReadDataValue(...) -> DataValue` | Same |
| `IDataChangeMonitoredItemQueue.PeekLast/Oldest()` | `TryPeekLastValue/Oldest(out DataValue)` | TryGet pattern |
| `IAggregateCalculator.GetProcessedValue(bool)` | `TryGetProcessedValue(bool, out DataValue)` | Same |
| `IUaPubSubDataStore.ReadPublishedDataItem(...)` | `TryReadPublishedDataItem(NodeId, uint, out DataValue)` | Same |
| `Dictionary<uint, DataValue?>` (NodeCacheContext) | `Dictionary<uint, DataValue>` | Default + IsNull |
| `IHistoryDataSource.FirstRaw/NextRaw` | `TryFirstRaw/TryNextRaw(out DataValue)` | TryGet pattern |
| `NodeState.ReadAttribute(... DataValue)` | `NodeState.ReadAttribute(... ref DataValue)` | Sync mutation via ref |
| `NodeState.ReadAttributeAsync(... DataValue)` | `NodeState.ReadAttributeAsync(...) -> ValueTask<(ServiceResult, DataValue)>` | Async return tuple |
| `obj as DataValue` (heterogeneous Dictionary<string, object>) | `obj is DataValue dv ? dv : default(DataValue)` | Safe struct cast |
| `Assert.That(dv, Is.Not.Null)` (tests) | `Assert.That(dv.IsNull, Is.False)` | Struct test pattern |
| `[Obsolete] Value` setter, all property setters | Removed; use ctor or `With*()` | Immutability |
| `[DataContract]` + `[DataMember]` | Removed; surrogate via `SerializableDataValue` + `DataValueSurrogateProvider` | Serialization |
### Wire format
Wire format is **byte-identical** to the previous class-based implementation across binary / JSON / XML encoders. Default DataValue (`.IsNull == true`) is treated as the equivalent of the old null reference (writes JSON `null`, binary `byte 0`, XML omitted element).
### Why TryGet pattern (instead of leaving `DataValue?`)
For methods that previously returned `DataValue?` to signal "no value available" (queue peek, aggregate result, data store lookup, history navigation), the conversion to `bool TryGet(out DataValue)` matches BCL conventions (`Dictionary.TryGetValue`, `Queue.TryPeek`, `Int32.TryParse`) and gives the caller an explicit "may be absent" affordance without `Nullable<DataValue>` overhead.
### Breaking changes summary
- `DataValue` is now a `readonly struct` - boxing/unboxing semantics change for callers using `object`-typed APIs.
- `IEncoder.WriteDataValue` / `IDecoder.ReadDataValue` / `ReadDataValueArray` interface signatures lose the `Nullable` wrapper.
- `IDataChangeMonitoredItemQueue.PeekLastValue` / `PeekOldestValue` -> `TryPeekLastValue` / `TryPeekOldestValue` (out parameter).
- `IAggregateCalculator.GetProcessedValue` -> `TryGetProcessedValue` (out parameter).
- `IUaPubSubDataStore.ReadPublishedDataItem` -> `TryReadPublishedDataItem` (out parameter).
- `NodeState.ReadAttribute` takes `ref DataValue`; `ReadAttributeAsync` returns `ValueTask<(ServiceResult, DataValue)>`.
- `DataValue` property setters removed (use constructor + `With*` mutators).
2026-05-23 11:38:49 +02:00
3e5f129c6f
Enable nullable in Stack, Libraries (9), and Applications projects ( #3732 )
2026-05-17 12:55:24 +02:00
03777ecb09
New Json decoder/encoders, array/matrix abstractions, ByteString, and more. ( #3619 )
...
- **Collections overhaul** — new/rewritten collection types (`ArrayOf`, `Collections` commits)
- **`Variant` builder/accessor** — new APIs for constructing and accessing Variants
- **`NodeId` operators made explicit** — breaking change for implicit conversions
- **Version bumped to 1.6** with preview build support
- **NumericRange** uses Variant
- **object** type accessors and general usage removed.
### 🏗️ Infrastructure
- Build config updated; `.NET 10` targeting
- InternalsVisibleTo moved to `.csproj`
- Pipeline/CI adjustments
2026-03-18 12:23:30 +01:00
f66ceffd75
Immutable built in types and code generation ( #3534 )
...
Generate stack and application code using source generators
Change built in types to readonly structs
Update localized text implementation to use JSON text serializer
Status code with symbolic names
Immutable node ids
No boxing for all built in types <= 8 bytes in Variant.
Split user identity token and token handling via token handler
Add migration guide for breaking changes
2026-02-12 16:27:07 +01:00
43ce7ed229
Code clean up and improvements ( #3532 )
...
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.
2026-02-09 13:37:06 +01:00
2960388560
Update headers and license files ( #3388 )
...
Update license headers to copy right year 2025, replace RCL/GPL headers with MIT, replace the nuget license with MIT (via license expression).
2025-12-04 19:44:40 +01:00
35db52a7a6
Move from .net 9 to .net 10 SDK and build new target framework .net 10 ( #3333 )
2025-11-13 10:45:47 +01:00
f8042e445c
Check bounds for switched on values and roslyn cleanup ( #3264 )
2025-10-21 09:28:19 +02:00
8e7a73c7df
Introduce telemetry context and proper use of ILogger ( #3213 )
2025-09-25 20:25:31 +02:00
954f2ba063
Fix nuget and official build and additional smaller analzyer fixes ( #3166 )
...
* Add strong namer
* Add suppression files
* Fix 462 build
2025-08-19 16:42:03 +02:00
9830e5d53e
Enable roslynizer and fix all analyzer issues ( #3157 )
...
* Fix warnings and suggestions
* Enable roslynator
2025-08-16 04:10:24 -07:00
cf7f2219a1
Fixed Typos. No functional changes. ( #2581 )
...
* Fixed typos across the board. No functional changes.
2024-04-11 08:21:16 +02:00
2b9d8f9de5
Fix warnings, no functional changes. Improve globalization. ( #2445 )
...
Fix warnings regarding localization, CLS compliance, performance. No functional changes.
Many but not all adressed:
CA1859
CA1868
CA1305
CA1310
CA1861
- based on the discussion, use IFormatProvider where appropriate in ToString
2024-02-14 17:17:21 +01:00
4c0880c800
Fix codesmells. No functional changes and bug fixes. ( #2368 )
...
Fix many warnings to improve code quality or simplify the code.
2023-11-07 10:34:42 +01:00
75744e27dd
Support Metadata frames in PubSub ( #1518 )
...
Refactored WriterGroupPublishState out of IPubSubConnection file
JSON Discovery messages for DataSetMetaData
UADP Discovery messages for DataSetMetaData (Request + response)
Refactored the UaPublisher, extracted IntervalRunner and reused it in UdpDiscoveryPublisher & UdpDiscoverySubscriber
Proposal: automatic setting of ConfigurationVersion based on the rules in 6.2.2.1.5 (part 14)in new class Opc.Ua.PubSub.Configuration.ConfigurationVersionUtils
New events added to UaPubSubApplication
Implemented support for UADP Data Key Frame DataSetMessages
Unit tests were updated to cover the new functionality
2021-09-28 11:54:37 +03:00
08164fe04a
MetaData support for PubSub library ( #1452 )
...
* Metadata support
* Fixes for UaPubSub.
* Add support for delta frames.
2021-07-08 19:29:24 +03:00
a5e1f4c8cd
PubSub fixes ( #1394 )
2021-05-12 13:33:29 +03:00
7a4a22201b
MQTT support in PubSub library ( #1376 )
...
Implementation of MQTT support in PubSub library
2021-04-28 15:31:06 +03:00
Marc Schier