Generate static methods at runtime?

[vemv]

All class-generating Clojure constructs that one can use at runtime such as proxy, reify, or defrecord, seem to generate instance methods only.

gen-class can emit static methods, but one cannot leverage its functionality at runtime.

Any way to accomplish this?

[James Reeves]

Out of curiosity, why would you want to?

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[Víctor M. Valenzuela]

Interop, what else :)

the lib is called Nailgun, several Clojure projects use it. You feed its Java server with classes that have a static main() method, and then C clients can call those main() methods via sockets. The point is to avoid JVM startup time.

An example: https://gist.github.com/vemv/5178570

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[Marko Topolnik]

gen-class can emit static methods, but one cannot leverage its functionality at runtime.

But since compile-time is also a kind of runtime in Clojure, shouldnt't you be able to dynamically create an appropriate .clj file with the ns form and main- form, and have it compiled? 

[Víctor M. Valenzuela]

Yeah I guess it could work, did you have in mind something like programmatically running `lein compile`?

Can the JVM handle .class files written on the fly?

Anyway, for my particular problem I don't need runtime-compiled static methods anymore.

On Sun, Mar 17, 2013 at 7:34 AM, Marko Topolnik <marko.t...@gmail.com> wrote:

gen-class can emit static methods, but one cannot leverage its functionality at runtime.

But since compile-time is also a kind of runtime in Clojure, shouldnt't you be able to dynamically create an appropriate .clj file with the ns form and main- form, and have it compiled? 

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[Marko Topolnik]

On Sunday, March 17, 2013 8:31:24 AM UTC+1, vemv wrote:

Yeah I guess it could work, did you have in mind something like programmatically running `lein compile`?

Yes, just about, but even simpler: you just call compile, load, load-file or similar while binding *compile-files* to true (compile does that itself, others leave you the choice).

 

Can the JVM handle .class files written on the fly?

Yes, the JVM can load a .class file at any time, and in fact it does so in the routine operation. Unloading a class is not as simple, though.