I'd also like to point out for the record, since I ran into this problem,
that the policy related static code must appear before any requires in the
Java code that loads the application specific functions; like the
"clojure-main" in the OPs example.
I believe a more modern load of the application Clojure code would look
like this (before the setPolicy):
public static final IFn require = Clojure.var("clojure.core",
"require");
static {
require.invoke(Clojure.read("clojure-main"));
}
After setPolicy code, it would look like this:
public static final IFn require = Clojure.var("clojure.core",
"require");
static {
Policy.setPolicy( new Policy() {
public PermissionCollection
getPermissions(CodeSource codesource) {
Permissions perms = new Permissions();
perms.add(new AllPermission());
return(perms);
}
public void refresh(){
}
});
require.invoke(Clojure.read("clojure-main"));
}
On Tuesday, April 22, 2008 at 9:44:27 AM UTC-4, Pawel Ostrowski wrote:
>
> Hello,
>
> I managed to successfully deploy simple clojure application with java
> web start. I will share my experience here, because I had some
> problems with granting enough security privileges to run clojure
> application as java web start applet (getting AccessControlException)
> and I did not find complete solution in group's archive. Editing
> java.policy file was not an option because I wanted to share my
> application with users who might not understand java policies at all.
>
> My application is written entirely in clojure except one java class
> with static main method. This main method looks like this:
>
> public static void main(String[] args) throws Exception {
> RT.init();
> // load clj resource
> loadFromClasspath("alphabet/alphabet.clj");
> // get clojure fun
> StringReader sr = new StringReader("clojure-main");
> PushbackReader r = new PushbackReader(sr);
> IFn clojureFun = (IFn) Compiler.eval(LispReader.read(r, false,
> null, false));
> // call clojure fun
> clojureFun.invoke();
> ...
>
> So all I do here is: load clojure source file, get clojure main
> function and then call it.
>
> To run it as java web start applet I had to:
>
> 1) Include <security><all-permissions/></security> element in
> my .jnlp file.
> 2) Sign clojure.jar and my application .jar files. Instructions found
> on http://www.dallaway.com/acad/webstart/ were helpful
> 3) Put the following code in static section in class with the static
> main method:
>
> static {
> Policy.setPolicy( new Policy() {
> public PermissionCollection
> getPermissions(CodeSource codesource) {
> Permissions perms = new Permissions();
> perms.add(new AllPermission());
> return(perms);
> }
> public void refresh(){
> }
> });
> }
>
> Third step was necessary because all permissions from first step were
> granted to javaws classloader only and clojure creates it's own
> classloaders, at least I think so :).
>
> ps. This is a simple alphabet typing swing application, it measures
> your time to type whole alphabet. Time starts with typing letter a and
> ends with letter z. Space resets the game. It may be run with javaws
> from here: http://www.pasza.org/files/alphabet/alphabet.jnlp
>
> clojure code may be found in this jar:
> http://www.pasza.org/files/alphabet/alphabet.jar
>
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