Multi-tenancy Lab

// Program.cs
builder.Services.AddPrimusMultiTenancy(options => {
    // Choose resolution strategy: Subdomain, Header, or Path
    options.ResolutionStrategy = TenantResolutionStrategy.Subdomain;
    
    // Data isolation approach
    options.IsolationStrategy = TenantIsolationStrategy.SchemaPerTenant;
    
    // Connection string template for isolated DBs
    options.ConnectionStringTemplate = "Server=.;Database=Primus_{TenantId};Trusted_Connection=true;";
    
    // Enable tenant caching for performance
    options.EnableTenantCache = true;
    options.TenantCacheDuration = TimeSpan.FromMinutes(10);
});

// Middleware setup (order matters)
app.UsePrimusTenantResolution();
app.UsePrimusTenantContext();

// Access current tenant in your services
public class MyService {
    private readonly ITenantContext _tenant;
    
    public MyService(ITenantContext tenant) {
        _tenant = tenant;
    }
    
    public async Task DoWork() {
        var tenantId = _tenant.Current.Id;
        var schema = _tenant.Current.Schema;
        // Queries automatically scoped to tenant
    }
}