Network Templates

<CommunicationTemplate x:Key="MicroserviceTemplate">
    <ServiceNode>
        <!-- Standard endpoints every microservice should have -->
        <EndpointNode Path="/health" />
        <EndpointNode Path="/metrics" />
        <EndpointNode Path="/ready" />
        
        <!-- Standard state management -->
        <ServiceNode.StateManager>
            <NetworkStateManager 
                PersistenceMode="Distributed"
                ReplicationFactor="3"/>
        </ServiceNode.StateManager>
        
        <!-- Standard message handlers -->
        <ServiceNode.MessageHandlers>
            <MessageHandler Path="/health" Handler="HandleHealthCheck"/>
            <MessageHandler Path="/metrics" Handler="HandleMetricsRequest"/>
        </ServiceNode.MessageHandlers>
    </ServiceNode>
</CommunicationTemplate>

<Matrix xmlns="http://schemas.matrix.com/network/2024">
    <!-- Apply template to a service -->
    <ServiceNode Name="OrderProcessor"
                 Template="{StaticResource MicroserviceTemplate}">
        <!-- Service-specific endpoints -->
        <EndpointNode Path="/orders/create" />
        <EndpointNode Path="/orders/process" />
        
        <!-- Override template properties -->
        <ServiceNode.StateManager>
            <NetworkStateManager 
                PersistenceMode="Distributed"
                ReplicationFactor="5"/>
        </ServiceNode.StateManager>
    </ServiceNode>
</Matrix>

public class NetworkTemplate : CommunicationElement
{
    public static readonly DependencyProperty ContentProperty =
        DependencyProperty.Register(
            "Content",
            typeof(ServiceNode),
            typeof(NetworkTemplate)
        );

    public ServiceNode Content
    {
        get => (ServiceNode)GetValue(ContentProperty);
        set => SetValue(ContentProperty, value);
    }

    public virtual ServiceNode CreateInstance()
    {
        var instance = Content.Clone();
        OnTemplateInstantiated(instance);
        return instance;
    }

    protected virtual void OnTemplateInstantiated(ServiceNode instance)
    {
        // Hook up standard behaviors
        ConfigureStateManagement(instance);
        ConfigureMessageHandling(instance);
        ConfigureNetworkBehavior(instance);
    }
}

public class NetworkTemplateFactory
{
    private readonly IServiceRegistry _registry;
    private readonly INetworkDispatcher _dispatcher;

    public async Task<ServiceNode> CreateServiceFromTemplateAsync(
        string templateKey, 
        IDictionary<string, object> parameters)
    {
        var template = FindTemplate(templateKey);
        var instance = template.CreateInstance();

        // Apply parameters
        foreach (var (key, value) in parameters)
        {
            instance.SetValue(key, value);
        }

        // Register with service discovery
        await _registry.RegisterServiceAsync(instance);

        // Initialize network connections
        await _dispatcher.InitializeServiceAsync(instance);

        return instance;
    }

    private NetworkTemplate FindTemplate(string key)
    {
        if (Application.Current.Resources.TryGetValue(key, out var resource)
            && resource is NetworkTemplate template)
        {
            return template;
        }

        throw new KeyNotFoundException($"Template '{key}' not found");
    }
}

public class StatefulServiceTemplate : NetworkTemplate
{
    protected override void OnTemplateInstantiated(ServiceNode instance)
    {
        base.OnTemplateInstantiated(instance);

        // Configure state persistence
        var stateManager = new NetworkStateManager
        {
            PersistenceMode = PersistenceMode.Distributed,
            ReplicationFactor = 3,
            ConsistencyLevel = ConsistencyLevel.Strong
        };

        instance.StateManager = stateManager;
    }
}

public class LoadBalancedTemplate : NetworkTemplate
{
    protected override void OnTemplateInstantiated(ServiceNode instance)
    {
        base.OnTemplateInstantiated(instance);

        // Configure load balancing
        var balancer = new ServiceLoadBalancer
        {
            Algorithm = LoadBalancingAlgorithm.RoundRobin,
            HealthCheckInterval = TimeSpan.FromSeconds(30)
        };

        instance.LoadBalancer = balancer;
    }
}