RE: How can I do something like (= (class ds) next.jdbc.connection)??

ret Atwood From: Laws Sent: Tuesday, October 22, 2019 3:17 PM To: Clojure Subject: Re: How can I do something like (= (class ds) next.jdbc.connection)?? > The ds binding that you have will satisfy this check (instance? > javax.sql.DataSource ds) --  > because it is an instance of that

Re: How can I do something like (= (class ds) next.jdbc.connection) ??

> The ds binding that you have will satisfy this check (instance? javax.sql.DataSource ds) -- > because it is an instance of that Java interface. My experience so far has been a lot of this stuff seems like commonsense to those programmers who have a background with Java, but those of us who

Re: How can I do something like (= (class ds) next.jdbc.connection) ??

You should :require the namespaces, not try to :import things. (ns your.namespace (:require [next.jdbc :as jdbc])) I suggest you start off by working through https://cljdoc.org/d/seancorfield/next.jdbc/1.0.9/doc/getting-started The ds binding that you have will satisfy this check (instance?

How can I do something like (= (class ds) next.jdbc.connection) ??

If I do this: (class ds) I see: next.jdbc.connection$url_PLUS_etc$reify__555 Is there anyway I can match against this? I'd like a runtime check to know that the code really does have a database connection. Imagine code like this: (if (= next.jdbc.connection (class ds)) (println "its