Add Domain Service & Processors

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Overview

In this article, we will explore the implementation of a domain service and processors for handling VFolder-related actions. The goal is to simplify the current implementation by moving actions from the handlers to the service without changing the existing code. We will discuss the user story, context, acceptance criteria, and provide a concept code example.

User Story

As a developer, when I implement the VFolder service, I want to move actions from the VFolder handlers to the service so that the code is cleaner and more maintainable.

As a developer, when I define actions in the decorator, I want to ensure they are implemented as service actions or validators so that they follow the correct structure.

Context

This issue involves defining the VFolder service and processors for handling VFolder-related actions. The goal is to simplify the current implementation by moving actions from the handlers to the service without changing the existing code.

Acceptance Criteria

To implement the domain service and processors, we need to meet the following acceptance criteria:

  • Move actions from VFolder-related handlers to the VFolder service.
  • Define actions in the decorator as service actions or validators.
  • Implement service action methods using input and result values that inherit from BaseAction and BaseActionResult classes.
  • Each service must be implemented as a class.
  • Maintain the existing connection with the root context.
  • No changes to the code other than moving to the service.

Concept Code

Here is a concept code example that demonstrates the implementation of the VFolder service and processors:

class VFolderService:
    async def create_vfolder(self, action: VFolderAction) -> VFolderActionResult: ...

    async def destroy_vfolder(self, action: VFolderAction) -> VFolderActionResult: ...

svc = VFolderService()

class VFolderProcessors:
    create: ActionProcessor[VFolderAction, VFolderActionResult]
    destroy: ActionProcessor[VFolderAction, VFolderActionResult]
    ...

    def __init__(self, monitors: list[ActionMonitor]) -> None:
        self.create = ActionProcessor(svc.create_vfolder, monitors=monitors, rollbacks=[...])
        self.destroy = ActionProcessor(svc.destroy_vfolder, monitors=monitors)

p = VFolderProcessors(monitors=[])

async def create_handler():
    act = VFolderAction(...)
    res = await p.create.wait_for_complete(act)
    return res.to_response()

Implementing the VFolder Service

To implement the VFolder service, we need to create a class that inherits from the BaseService class. The BaseService class provides a basic implementation of the service interface.

class VFolderService(BaseService):
    async def create_vfolder(self, action: VFolderAction) -> VFolderActionResult:
        # Implement the create_vfolder method
        pass

    async def destroy_vfolder(self, action: VFolderAction) -> VFolderActionResult:
        # Implement the destroy_vfolder method
        pass

Implementing the VFolder Processors

To implement the VFolder processors, we need to create a class that inherits from the BaseProcessors class. The BaseProcessors class provides a basic implementation of the processors interface.

class VFolderProcessors(BaseProcessors):
    create: ActionProcessor[VFolderAction, VFolderActionResult]
    destroy: ActionProcessor[VFolderAction, VFolderActionResult]
    ...

    def __init__(self, monitors: list[ActionMonitor]) -> None:
        self.create = ActionProcessor(svc.create_vfolder, monitors=monitors, rollbacks=[...])
        self.destroy = ActionProcessor(svc.destroy_vfolder, monitors=monitors)

Moving Actions from Handlers to Service

To move actions from the handlers to the service, we need to update the create_handler function to use the VFolder service instead of the VFolder handlers.

async def create_handler():
    act = VFolderAction(...)
    res = await p.create.wait_for_complete(act)
    return res.to_response()

Defining Actions in the Decorator

To define actions in the decorator, we need to update the decorator to use the VFolder service instead of the VFolder handlers.

@action_decorator
async def create_vfolder(action: VFolderAction) -> VFolderActionResult:
    # Implement the create_vfolder method
    pass

@action_decorator
async def destroy_vfolder(action: VFolderAction) -> VFolderActionResult:
    # Implement the destroy_vfolder method
    pass

Conclusion

Q: What is the purpose of implementing a domain service and processors for VFolder actions?

A: The purpose of implementing a domain service and processors for VFolder actions is to simplify the current implementation by moving actions from the handlers to the service without changing the existing code. This will make the code cleaner and more maintainable.

Q: What are the acceptance criteria for implementing the domain service and processors?

A: The acceptance criteria for implementing the domain service and processors are:

  • Move actions from VFolder-related handlers to the VFolder service.
  • Define actions in the decorator as service actions or validators.
  • Implement service action methods using input and result values that inherit from BaseAction and BaseActionResult classes.
  • Each service must be implemented as a class.
  • Maintain the existing connection with the root context.
  • No changes to the code other than moving to the service.

Q: How do I implement the VFolder service?

A: To implement the VFolder service, you need to create a class that inherits from the BaseService class. The BaseService class provides a basic implementation of the service interface. You can then implement the service action methods using input and result values that inherit from BaseAction and BaseActionResult classes.

Q: How do I implement the VFolder processors?

A: To implement the VFolder processors, you need to create a class that inherits from the BaseProcessors class. The BaseProcessors class provides a basic implementation of the processors interface. You can then implement the processors using the VFolder service.

Q: How do I move actions from handlers to the service?

A: To move actions from handlers to the service, you need to update the handlers to use the VFolder service instead of the VFolder handlers. You can then update the decorators to use the VFolder service instead of the VFolder handlers.

Q: What are the benefits of implementing a domain service and processors for VFolder actions?

A: The benefits of implementing a domain service and processors for VFolder actions are:

  • Simplified code: By moving actions from handlers to the service, the code becomes cleaner and more maintainable.
  • Improved scalability: The domain service and processors can be easily scaled to handle a large number of requests.
  • Better performance: The domain service and processors can be optimized for performance, resulting in faster response times.

Q: What are the challenges of implementing a domain service and processors for VFolder actions?

A: The challenges of implementing a domain service and processors for VFolder actions are:

  • Complexity: Implementing a domain service and processors can be complex, especially if you are new to the technology.
  • Time-consuming: Implementing a domain service and processors can take a significant amount of time, especially if you are working on a large project.
  • Requires expertise: Implementing a domain service and processors requires expertise in the technology and domain knowledge.

Q: How do I get started with implementing a domain service and processors for VFolder actions?

A: To get started with implementing a domain service and processors for VFolder actions, you need to:

  • Understand the technology: You need to have a good understanding of the technology and its components.
  • Review the documentation: You need to review the documentation to understand the requirements and implementation details.
  • Start with a small project: You can start with a small project to get familiar with the technology and implementation details.
  • Seek help: If you are new to the technology, you can seek help from experts or online communities.