Dynamic commands

[aminchegeni]

Hi Mr. Valkealahti

Happy new Years

I search for the document for in-depth knowledges about internal and design of spring shell. I read a lot official documents and did many debug around internals of spring shell. I decide to design cli application that knows its commands at runtime. It connects to the some rest endpoint and detects the actual commands can be provided. In my design I like to add some features as below:

• Enable some aliasing like Linux (for example the user can alias some commands by its default as new command to CommandCatalog)
• Add CommandRegistration instance that has many options but Its TargetSpec bound to the bean’s method with single DTO (in fact the command options are fields of target method input DTO. I implemented it by using the HandlerMethodArgumentResolver).
• I need mechanism for add new instance of HandlerMethodArgumentResolver to CommandExecutionHandlerMethodArgumentResolvers (currently I used @eventlistener for ContextRefreshedEvent and customize default ones)
• I need know about some internal part of spring shell

I really will be happy if you could help me by some hints or advanced docs.

Best wishes for you in the new year

Amin Chegeni

[jvalkeal]

Defined commands can already define aliases but looks like you'd want to have a feature where user can define these at runtime. That we don't have but it's a relatively nice idea. You could create a new issue for this.

For dynamic commands there's a CommandResolver which can be used to add commands which are not known at build time. There's an example of its use in spring-cli DynamicMethodCommandResolver Is this something you're after?

[aminchegeni]

Hi Mr. Valkealahti

Thank you for your reply

Please let me check spring-cli asap.

I will come back here for additional explanation.

Best regards