MelloSilveiraTools 1.4.0

MelloSilveiraTools

A suite of .NET 10 NuGet packages with helpers for system development: extension methods, infrastructure (database, logging, resilience, encryption), web-API helpers, a runtime plugin system, and engineering toolkits (mathematics, mechanics of materials).

Packages

Pick the contextual packages your application actually needs, or install the meta-package for everything.

Quick start

Everything in one go

services.AddToolsServices(
    databaseSettings,
    encryptionSettings,
    resiliencePipelineSettings,
    pluginSettings,
    loggerSettings);

AddToolsServices (from the meta-package) chains AddCoreServices, AddDatabaseServices, AddMathematicsServices, AddMechanicsOfMaterialsServices, AddPluginServices and AddWebApiServices. JWE auth and Swagger remain opt-in.

Granular wire-up

services
    .AddCoreServices(encryptionSettings, resiliencePipelineSettings, loggerSettings)
    .AddDatabaseServices(databaseSettings, resiliencePipelineSettings)
    .AddWebApiServices(resiliencePipelineSettings)
    .AddJweAuthentication(jwtSettings)
    .AddSwaggerWithBearerSecurity()
    .AddMathematicsServices()
    .AddMechanicsOfMaterialsServices()
    .AddPluginServices(pluginSettings);

A worker that just talks to PostgreSQL and writes file logs only needs:

services
    .AddCoreServices(encryptionSettings, resiliencePipelineSettings)
    .AddDatabaseServices(databaseSettings, resiliencePipelineSettings);

— no ASP.NET, JWT, Swagger, plugins or Polly-for-SMTP transitive dependencies.

HTTP endpoints

Both MVC controllers and minimal-API endpoint extensions ship side-by-side; consumers pick whichever style matches their host. The classic controllers (CustomControllerBase, CrudController<TEntity, TFilter>, PluginController) remain available for hosts that already wire app.MapControllers(). New projects can use the equivalent minimal-API extensions instead:

// Generic CRUD over an entity + filter pair (alongside CrudController<TEntity, TFilter>):
app.MapCrud<MyEntity, MyFilter>(pattern: "/api/v1/things", resourceName: "thing");

// Plugin management (alongside PluginController):
app.MapPluginEndpoints("/api/v1/plugins");

MapCrud exposes the same surface the controller does: POST /, GET /{id:long}, GET / (filter + pagination), PUT /{id:long}, DELETE /{id:long} and GET /stream (NDJSON). NDJSON streaming is also available standalone via httpContext.WriteNdjsonAsync(asyncSequence, logger, resourceName).

AOT compatibility

Every package opts in to <IsAotCompatible>true</IsAotCompatible>. The trim/AOT diagnostic warnings (IL2026, IL3050, etc.) are silenced via <NoWarn> at the project level, so the toolkit doesn't propagate [RequiresUnreferencedCode]/[RequiresDynamicCode] annotations on its public surface. Where reflection-target preservation matters, [DynamicallyAccessedMembers] annotations are kept so the trimmer keeps the right members.

In prose: Core, Mathematics and MechanicsOfMaterials are AOT-clean. Database and WebApi build AOT-clean but exercise reflection at runtime (Dapper materialization, attribute-driven SQL, Swashbuckle's Newtonsoft adapter); consumers publishing AOT will see those trim warnings in their own analyzers when they call into those paths and must accept them or replace with source-generated equivalents. Plugins is fundamentally not AOT-publishable: AssemblyLoadContext.LoadFromAssemblyPath cannot work in a published AOT app.

Plugin system

A complete plugin architecture that lets a host application discover, load and hot-swap external assemblies dropped into a folder, with their services automatically registered into the DI container.

Capabilities

• File-based discovery. DLLs named {name}.v{major}.{minor}.{patch}.dll are scanned from the configured plugin directory. Once loaded they are moved to a loaded/ subfolder.
• Two registration modes.
  • Startup: services registered against the root IServiceCollection (IPluginService.LoadPluginsOnStartup).
  • Runtime: services registered against an IDynamicServiceProvider (IPluginService.LoadPluginsOnRuntime), so plugins can come and go without restarting the host.
• Type processors. Implement IPluginTypeProcessor to teach the system how to register a particular base type (interface or class) found inside a plugin assembly. The processor receives a PluginRegistrationContext that exposes either the IServiceCollection (startup) or the IDynamicServiceProvider (runtime).
• Two-level cache. PluginCache keys by plugin name and PluginVersion. Entries progress through DiscoveredPlugin → LoadedPlugin → RegisteredPlugin, with RegisteredPlugin.IsFullyLoaded / FullyLoadedAt marking the final stage.
• Persistence. IPluginCachePersistence snapshots the cache to non-volatile storage. Two implementations ship out of the box (PluginCacheTargets.File, PluginCacheTargets.Database); consumers can add their own keyed implementations and the existing endpoints route to them via the {target} route value. The fallback used outside an HTTP request is configurable via PluginSettings.DefaultCacheTarget.
• Background orchestrator. PluginOrchestratorBackgroundService polls the plugin folder periodically (PluginSettings.PollInterval) and:
  • ignores files whose version is lower than the highest currently-loaded version, logging a warning;
  • skips files already fully loaded;
  • loads higher versions through LoadPluginsOnRuntime and evicts older cached versions, keeping the version immediately below the new one until PluginSettings.PreviousVersionRetention elapses.
• Application operations. Ready-to-use operations (GetPlugins, LoadPlugins, ReloadPlugins, ClearPluginCache, PersistPluginCache, RestorePluginCache) wrap IPluginService for HTTP exposure.

Wire-up

services.AddPluginServices(new PluginSettings
{
    Directory = "/var/app/plugins",
    PollInterval = TimeSpan.FromSeconds(30),
    PreviousVersionRetention = TimeSpan.FromHours(24),
    DefaultCacheTarget = PluginCacheTargets.File
});

AddPluginServices registers everything needed (cache, persistences, processors, orchestrator) and eagerly runs LoadPluginsOnStartup against the supplied IServiceCollection before returning. This must happen during DI configuration: once the host is built the collection is sealed, so any later registration would be discarded.

File naming

MyCompany.Plugins.Reporting.v1.2.3.dll
^---------- name -----------^^ version ^

PluginVersion parses the v{major}.{minor}.{patch} suffix and supports comparison operators, so the orchestrator can decide whether a file is newer than what is already loaded.

Mathematics

MelloSilveiraTools.Mathematics ships the following toolkits. The DI entry point (AddMathematicsServices) registers only the differential-equation solvers; the rest are used directly without injection.

Differential equation solvers — NewmarkMethod, NewmarkBetaMethod (registered via DI), DifferentialEquationMethodFactory.

Function system — Function abstract class with lazy Derivative / Integral properties. Concrete types: ConstantFunction, PolynomialFunction, ExponencialFunction, SineFunction, CosineFunction, PowerLaw, GenericFunction. Create by enum via FunctionFactory.

Expressions — Expression (sum of Function instances) and PronySeries (c + Σ aₙ·e^(aₙx)).

Numerical methods — SimpsonRuleIntegration (integral), Derivative (finite-difference), BisectionMethod / BrentMethod / RootFinding / StepByStepMethod (root-finding, all implement IRootFinding).

Statistics — IStatisticsCalculator / StatisticsCalculator.

Geometry and utilities — Point3D, Vector3D, UnitConverter, CustomMath / MathematicConstants, Vector3DExtension, DoubleExtensions.

services.AddMathematicsServices();

Mechanics of Materials

MelloSilveiraTools.MechanicsOfMaterials provides the following calculators. The DI entry point (AddMechanicsOfMaterialsServices) registers only the fatigue, constitutive equations, and geometric-property calculators; mechanical models and load sharing are used directly.

Fatigue — IFatigueCalculator / FatigueCalculator (Goodman/Marin criteria, registered via DI).

Constitutive equations — IConstitutiveEquationsCalculator / ConstitutiveEquationsCalculator (registered via DI).

Geometric properties — IGeometricPropertyCalculator<CircularProfile> / IGeometricPropertyCalculator<RectangularProfile> (registered via DI).

Mechanical models — generic IMechanicalModelCalculator<TInput> (force, displacement, stress, strain). Implementations: ElasticModelCalculator; linear viscoelastic MaxwellModelCalculator; non-linear viscoelastic SchaperyModelCalculator, ModifiedSuperpositionMethodCalculator; quasi-linear viscoelastic FungModelCalculator, SimplifiedFungModelCalculator.

Load sharing — ILoadSharingCalculator / LoadShare1DTissueThreeDimensionalSpaceCalculator (specimen displacement, angle, force projection and derivatives in 3-D space).

3D force model — immutable Force struct; use Sum/Subtract/Round/Divide/Abs/Create to derive new instances.

services.AddMechanicsOfMaterialsServices();