Plugin Project Architecture for MS CRM 365

Designing a robust and maintainable architecture for your MS CRM 365 plugin project is crucial for its success. Here's a suggested architecture that can help you in development and maintenance:

Let's assume you are creating a plugin for MS CRM 365 to manage contacts. The project will have three main layers: Plugin Layer, Business Logic Layer, and Data Access Layer.

Now, let's briefly describe each layer:

1. Plugin Layer (ContactManagement.Plugin):

   • Contains CRM plugins that handle events triggered by the CRM system.

2. Business Logic Layer (ContactManagement.BusinessLogic):

   • Contains the core business logic for managing contacts.
   • ContactService.cs implements business logic related to contacts.
   • Interfaces folder contains interfaces for the business logic layer to promote loose coupling.

3. Data Access Layer (ContactManagement.DataAccess):

   • Manages data access to the CRM database or any other data source.
   • ContactRepository.cs handles CRUD operations for contacts.
   • Interfaces folder contains interfaces for the data access layer to promote loose coupling.

4. Service Layer (ContactManagement.Service):

   • Manages interactions with external services or APIs.
   • ExternalService.cs provides methods to interact with an external service.
   • Interfaces folder contains interfaces for the service layer to promote loose coupling.

5. Unit Tests (ContactManagement.Tests):

   • Contains unit tests for the business logic and data access components.

6. Common (ContactManagement.Common):

   • Contains common utilities, such as a logger.

7. Root (ContactManagementSolution):

   • Solution file and configuration files.

In this example, you would implement actual logic in the respective classes and methods. Always remember to follow coding standards, documentation practices, and additional best practices for CRM development as suggested by Microsoft. Additionally, set up dependency injection, logging, and exception handling based on your project's requirements.

This is a basic starting point, and depending on the complexity of your project, you may need to further modularize or extend this structure.

Example-

ContactService (Business Logic Layer):

// ContactManagement.BusinessLogic/ContactService.cs using System; namespace ContactManagement.BusinessLogic { public class ContactService : IContactService { private readonly IContactRepository _contactRepository; private readonly IExternalService _externalService; public ContactService(IContactRepository contactRepository, IExternalService externalService) { _contactRepository = contactRepository ?? throw new ArgumentNullException(nameof(contactRepository)); _externalService = externalService ?? throw new ArgumentNullException(nameof(externalService)); } public void ProcessContactCreated(Guid contactId) { // Business logic for contact created event var contact = _contactRepository.GetContact(contactId); // Perform additional processing or validation as needed _externalService.NotifyContactCreated(contact); } public void ProcessContactUpdated(Guid contactId) { // Business logic for contact updated event var contact = _contactRepository.GetContact(contactId); // Perform additional processing or validation as needed _externalService.NotifyContactUpdated(contact); } } }

ContactRepository (Data Access Layer):

// ContactManagement.DataAccess/ContactRepository.cs using System; namespace ContactManagement.DataAccess { public class ContactRepository : IContactRepository { public Contact GetContact(Guid contactId) { // Retrieve contact from the data source (CRM database or other) // Example: return CRMService.GetContactById(contactId); throw new NotImplementedException(); } // Additional methods for CRUD operations as needed } }

ExternalService (Service Layer):

// ContactManagement.Service/ExternalService.cs using System; namespace ContactManagement.Service { public class ExternalService : IExternalService { public void NotifyContactCreated(Contact contact) { // Logic to notify external service about the contact created event // Example: ExternalAPIService.NotifyContactCreated(contact); throw new NotImplementedException(); } public void NotifyContactUpdated(Contact contact) { // Logic to notify external service about the contact updated event // Example: ExternalAPIService.NotifyContactUpdated(contact); throw new NotImplementedException(); } } }

CRM Plugin (Plugin Layer):

// ContactManagement.Plugin/ContactCreatedPlugin.cs using Microsoft.Xrm.Sdk; namespace ContactManagement.Plugin { public class ContactCreatedPlugin : IPlugin { public void Execute(IServiceProvider serviceProvider) { // Extract the execution context from the service provider. IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext)); // Check if the plugin is triggered by a contact creation event if (context.InputParameters.Contains("Target") && context.InputParameters["Target"] is Entity targetEntity && targetEntity.LogicalName == "contact") { // Call the ContactService to process the contact created event var contactService = new ContactService(new ContactRepository(), new ExternalService()); contactService.ProcessContactCreated(targetEntity.Id); } } } }

This example assumes the existence of interfaces (IContactService, IContactRepository, IExternalService) and their implementations. Also, the CRM-specific logic for retrieving contacts and interacting with the CRM database or services is not provided in this example.

Make sure to set up dependency injection and handle exceptions appropriately in a real-world scenario. Additionally, implement the required interfaces and their methods in the respective layers. The goal is to keep the layers loosely coupled for better maintainability and testability.