LoadClojure

com.google.leijure.LoadClojure

Java class com.google.leijure.LoadClojure to dynamically load Clojure and evaluate code with it.

Suppose you have an application with which you somehow do not want to bundle Clojure, but that you like to once in a while be able to query or control using Clojure. For asynchronous access, you could use liverepl. But for synchronous queries, here is LoadClojure. You can evaluate clojure code with:

    staticVariable = ...
    new LoadClojure().loadString("(println my.fully.qualified.Class/staticVariable)");

Alternatively, you can:

    clojure = new LoadClojure(new URL("file:///home/me/jars/clojure.jar"));
    clojure.loadStrings(Arrays.asList(argv));

Or you can:

    new LoadClojure(new URL("file:///home/me/jars/clojure.jar"));
    LoadClojure.loadStrings(Arrays.asList(argv));

loadString will load code from one string and return the results from the last evaluated form. loadStrings will load code from each of many strings and return the results from the last form of the last string.

The LoadClojure constructor will try to locate your clojure.jar in various ways:

• from the current ClassLoader,
• from a user-specified URL (passed to the LoadClojure constructor),
• from the Java system property clojure.jar.url,
• from the URL specified by environment variable CLOJURE_JAR_URL,
• from the file ~/local/share/java/clojure.jar,
• from the file /usr/local/share/java/clojure.jar,
• from the file /usr/share/java/clojure.jar. (The share/java/*.jar is a convention notably followed by Debian.)

You may specify a jar that has clojure plus additional code you want loaded with it, you may load clojure then use clojure to load additional code.