require all namespaces by prefix





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I have an application that can be extended with defmethod calls. The application should be extended in runtime by adding new namespaces to the classpath that contain additional defmethod calls.



I am looking for a dependency injection solution. The question is: how will my application know what namespaces it should require so that the defmethod calls can take effect?




  1. One solution is to have a central configuration file that contains the names of the namespaces that can be required. A drawback is that I need to edit the configurations by hand when I want to enable a plugin.


  2. An other way is to somehow dynamically scan the classpath for additional namespaces and require them based on a predicate (for example a namespce name prefix).



I found only these two solutions but I wonder what other ways may be around to do runtime dependency injection in Clojure. And what libraries are commonly used for this purpose?



Thank you in advance.










share|improve this question























  • What do you mean by "I have an application that can be extended with defmethod calls"? You have a defmulti defined that users can create methods for?

    – Carcigenicate
    Nov 21 '18 at 21:16











  • Yes, the application has some multimethods in its core pipeline and the users should extend the functionality with defmethod calls.

    – erdos
    Nov 21 '18 at 21:24






  • 1





    Why does your application need to require namespaces? The users implementing a method should be sufficient unless I'm misunderstanding what you're trying to do.

    – Carcigenicate
    Nov 21 '18 at 21:28






  • 1





    I guess this is mostly a question about how to load user-supplied code (plugins), whatever that code does.

    – Svante
    Nov 21 '18 at 22:14


















0















I have an application that can be extended with defmethod calls. The application should be extended in runtime by adding new namespaces to the classpath that contain additional defmethod calls.



I am looking for a dependency injection solution. The question is: how will my application know what namespaces it should require so that the defmethod calls can take effect?




  1. One solution is to have a central configuration file that contains the names of the namespaces that can be required. A drawback is that I need to edit the configurations by hand when I want to enable a plugin.


  2. An other way is to somehow dynamically scan the classpath for additional namespaces and require them based on a predicate (for example a namespce name prefix).



I found only these two solutions but I wonder what other ways may be around to do runtime dependency injection in Clojure. And what libraries are commonly used for this purpose?



Thank you in advance.










share|improve this question























  • What do you mean by "I have an application that can be extended with defmethod calls"? You have a defmulti defined that users can create methods for?

    – Carcigenicate
    Nov 21 '18 at 21:16











  • Yes, the application has some multimethods in its core pipeline and the users should extend the functionality with defmethod calls.

    – erdos
    Nov 21 '18 at 21:24






  • 1





    Why does your application need to require namespaces? The users implementing a method should be sufficient unless I'm misunderstanding what you're trying to do.

    – Carcigenicate
    Nov 21 '18 at 21:28






  • 1





    I guess this is mostly a question about how to load user-supplied code (plugins), whatever that code does.

    – Svante
    Nov 21 '18 at 22:14














0












0








0








I have an application that can be extended with defmethod calls. The application should be extended in runtime by adding new namespaces to the classpath that contain additional defmethod calls.



I am looking for a dependency injection solution. The question is: how will my application know what namespaces it should require so that the defmethod calls can take effect?




  1. One solution is to have a central configuration file that contains the names of the namespaces that can be required. A drawback is that I need to edit the configurations by hand when I want to enable a plugin.


  2. An other way is to somehow dynamically scan the classpath for additional namespaces and require them based on a predicate (for example a namespce name prefix).



I found only these two solutions but I wonder what other ways may be around to do runtime dependency injection in Clojure. And what libraries are commonly used for this purpose?



Thank you in advance.










share|improve this question














I have an application that can be extended with defmethod calls. The application should be extended in runtime by adding new namespaces to the classpath that contain additional defmethod calls.



I am looking for a dependency injection solution. The question is: how will my application know what namespaces it should require so that the defmethod calls can take effect?




  1. One solution is to have a central configuration file that contains the names of the namespaces that can be required. A drawback is that I need to edit the configurations by hand when I want to enable a plugin.


  2. An other way is to somehow dynamically scan the classpath for additional namespaces and require them based on a predicate (for example a namespce name prefix).



I found only these two solutions but I wonder what other ways may be around to do runtime dependency injection in Clojure. And what libraries are commonly used for this purpose?



Thank you in advance.







dependency-injection clojure clojure-java-interop






share|improve this question













share|improve this question











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asked Nov 21 '18 at 21:06









erdoserdos

1,084515




1,084515













  • What do you mean by "I have an application that can be extended with defmethod calls"? You have a defmulti defined that users can create methods for?

    – Carcigenicate
    Nov 21 '18 at 21:16











  • Yes, the application has some multimethods in its core pipeline and the users should extend the functionality with defmethod calls.

    – erdos
    Nov 21 '18 at 21:24






  • 1





    Why does your application need to require namespaces? The users implementing a method should be sufficient unless I'm misunderstanding what you're trying to do.

    – Carcigenicate
    Nov 21 '18 at 21:28






  • 1





    I guess this is mostly a question about how to load user-supplied code (plugins), whatever that code does.

    – Svante
    Nov 21 '18 at 22:14



















  • What do you mean by "I have an application that can be extended with defmethod calls"? You have a defmulti defined that users can create methods for?

    – Carcigenicate
    Nov 21 '18 at 21:16











  • Yes, the application has some multimethods in its core pipeline and the users should extend the functionality with defmethod calls.

    – erdos
    Nov 21 '18 at 21:24






  • 1





    Why does your application need to require namespaces? The users implementing a method should be sufficient unless I'm misunderstanding what you're trying to do.

    – Carcigenicate
    Nov 21 '18 at 21:28






  • 1





    I guess this is mostly a question about how to load user-supplied code (plugins), whatever that code does.

    – Svante
    Nov 21 '18 at 22:14

















What do you mean by "I have an application that can be extended with defmethod calls"? You have a defmulti defined that users can create methods for?

– Carcigenicate
Nov 21 '18 at 21:16





What do you mean by "I have an application that can be extended with defmethod calls"? You have a defmulti defined that users can create methods for?

– Carcigenicate
Nov 21 '18 at 21:16













Yes, the application has some multimethods in its core pipeline and the users should extend the functionality with defmethod calls.

– erdos
Nov 21 '18 at 21:24





Yes, the application has some multimethods in its core pipeline and the users should extend the functionality with defmethod calls.

– erdos
Nov 21 '18 at 21:24




1




1





Why does your application need to require namespaces? The users implementing a method should be sufficient unless I'm misunderstanding what you're trying to do.

– Carcigenicate
Nov 21 '18 at 21:28





Why does your application need to require namespaces? The users implementing a method should be sufficient unless I'm misunderstanding what you're trying to do.

– Carcigenicate
Nov 21 '18 at 21:28




1




1





I guess this is mostly a question about how to load user-supplied code (plugins), whatever that code does.

– Svante
Nov 21 '18 at 22:14





I guess this is mostly a question about how to load user-supplied code (plugins), whatever that code does.

– Svante
Nov 21 '18 at 22:14












1 Answer
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There are 3 dependency injection frameworks commonly used in Clojure land:




  • Component

  • Mount

  • Integrant


Of these, Integrant will probably fit your way of thinking best. However, in the past I've thought that I had the problem you are describing, and gone with the scan for namespaces that need to be required approach. But in the fullness of time I realised that I was structuring by code in a sub-optimal way, and thinking about it differently made the code easier to follow and fixed this backwards dependency problem at the same time. Your situation may well be different. The searching for namespaces to load does work though ;)






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    0














    There are 3 dependency injection frameworks commonly used in Clojure land:




    • Component

    • Mount

    • Integrant


    Of these, Integrant will probably fit your way of thinking best. However, in the past I've thought that I had the problem you are describing, and gone with the scan for namespaces that need to be required approach. But in the fullness of time I realised that I was structuring by code in a sub-optimal way, and thinking about it differently made the code easier to follow and fixed this backwards dependency problem at the same time. Your situation may well be different. The searching for namespaces to load does work though ;)






    share|improve this answer




























      0














      There are 3 dependency injection frameworks commonly used in Clojure land:




      • Component

      • Mount

      • Integrant


      Of these, Integrant will probably fit your way of thinking best. However, in the past I've thought that I had the problem you are describing, and gone with the scan for namespaces that need to be required approach. But in the fullness of time I realised that I was structuring by code in a sub-optimal way, and thinking about it differently made the code easier to follow and fixed this backwards dependency problem at the same time. Your situation may well be different. The searching for namespaces to load does work though ;)






      share|improve this answer


























        0












        0








        0







        There are 3 dependency injection frameworks commonly used in Clojure land:




        • Component

        • Mount

        • Integrant


        Of these, Integrant will probably fit your way of thinking best. However, in the past I've thought that I had the problem you are describing, and gone with the scan for namespaces that need to be required approach. But in the fullness of time I realised that I was structuring by code in a sub-optimal way, and thinking about it differently made the code easier to follow and fixed this backwards dependency problem at the same time. Your situation may well be different. The searching for namespaces to load does work though ;)






        share|improve this answer













        There are 3 dependency injection frameworks commonly used in Clojure land:




        • Component

        • Mount

        • Integrant


        Of these, Integrant will probably fit your way of thinking best. However, in the past I've thought that I had the problem you are describing, and gone with the scan for namespaces that need to be required approach. But in the fullness of time I realised that I was structuring by code in a sub-optimal way, and thinking about it differently made the code easier to follow and fixed this backwards dependency problem at the same time. Your situation may well be different. The searching for namespaces to load does work though ;)







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 22 '18 at 22:19









        l0st3dl0st3d

        2,04212028




        2,04212028
































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