Comments on: Executing Play! from outside of Play! code http://www.rojotek.com/blog/2010/04/26/executing-play-from-outside-of-play-code/ Software Development in Brisbane Fri, 03 Feb 2012 20:00:10 +0000 hourly 1 http://wordpress.org/?v=3.1.3 By: Joseph http://www.rojotek.com/blog/2010/04/26/executing-play-from-outside-of-play-code/comment-page-1/#comment-31209 Joseph Wed, 30 Jun 2010 13:38:21 +0000 http://www.rojotek.com/blog/?p=949#comment-31209 Hi guys! I'm working on a play project, and running into a couple of obstacles. To give a quick overview of the project, I have to deal real-time processes with user Interface handled by play. The work horse behind is Drools. I'm running into problems coupling the two elements. And I'm trying to run some play code of the box, mainly accessing models. Could be kind enough to give an example of to run these calls exactly. I seem to be missing a certain number of elements while launching the app. So a little insight on the usage of the code snippet would be much appreciated :) Cheers, Joseph Hi guys!

I’m working on a play project, and running into a couple of obstacles. To give a quick overview of the project, I have to deal real-time processes with user Interface handled by play. The work horse behind is Drools. I’m running into problems coupling the two elements. And I’m trying to run some play code of the box, mainly accessing models. Could be kind enough to give an example of to run these calls exactly.

I seem to be missing a certain number of elements while launching the app. So a little insight on the usage of the code snippet would be much appreciated :)

Cheers,
Joseph

]]> By: Lex http://www.rojotek.com/blog/2010/04/26/executing-play-from-outside-of-play-code/comment-page-1/#comment-30096 Lex Tue, 04 May 2010 15:03:13 +0000 http://www.rojotek.com/blog/?p=949#comment-30096 Useful trick! As you feel that Play framework is lovely, I invite you to join at http://www.myplayforum.com, a new Play framework community See you soon! :) Useful trick! As you feel that Play framework is lovely, I invite you to join at http://www.myplayforum.com, a new Play framework community See you soon! :)

]]> By: Rob http://www.rojotek.com/blog/2010/04/26/executing-play-from-outside-of-play-code/comment-page-1/#comment-29899 Rob Mon, 26 Apr 2010 12:03:59 +0000 http://www.rojotek.com/blog/?p=949#comment-29899 ouch -- I was going through an extra level of indirection -- I had some code that called the enhanced code on the Play side -- so was calling a method on an object that then called a method on the Model subclasses. so in my execute I was calling something like: persister.load(), and then within the load method code was calling play models. ouch — I was going through an extra level of indirection — I had some code that called the enhanced code on the Play side — so was calling a method on an object that then called a method on the Model subclasses.

so in my execute I was calling something like:

persister.load(), and then within the load method code was calling play models.

]]> By: Sam Owen http://www.rojotek.com/blog/2010/04/26/executing-play-from-outside-of-play-code/comment-page-1/#comment-29897 Sam Owen Mon, 26 Apr 2010 10:46:56 +0000 http://www.rojotek.com/blog/?p=949#comment-29897 Which version on play have you tried this on? On play 1.0.2, when I try to use the byte-code enhanced JPA static helper methods on Model subclasses (count, all, find ... etc) I get the following ... Caused by: java.lang.UnsupportedOperationException: Please annotate your JPA model with @javax.persistence.Entity annotation. at play.db.jpa.JPASupport.find(JPASupport.java:395) at model.crud.IndexCRUD.testDeletingAnIndexRemovesAllIds(IndexCRUD.java:22) at model.crud.IndexCRUD.execute(IndexCRUD.java:15) at play.Invoker$Invocation.run(Invoker.java:176) ... 16 more To make these work I had to get to jump through the following hoops (and run in prod mode): Play.classes.add(new ApplicationClasses.ApplicationClass(name)); Class aClass = Play.classloader.loadClass(name); Method declaredMethod = Play.classloader.loadClass(Invoker.class.getName()).getDeclaredMethod("invoke", Invoker.Invocation.class); Future f = (Future) Java.invokeStatic(declaredMethod, new Object[]{(Invoker.Invocation) aClass.newInstance()}); f.get(); where name in the fully qualified name of the play invocation I want to run. Urg Which version on play have you tried this on? On play 1.0.2, when I try to use the byte-code enhanced JPA static helper methods on Model subclasses (count, all, find … etc) I get the following …

Caused by: java.lang.UnsupportedOperationException: Please annotate your JPA model with @javax.persistence.Entity annotation.
at play.db.jpa.JPASupport.find(JPASupport.java:395)
at model.crud.IndexCRUD.testDeletingAnIndexRemovesAllIds(IndexCRUD.java:22)
at model.crud.IndexCRUD.execute(IndexCRUD.java:15)
at play.Invoker$Invocation.run(Invoker.java:176)
… 16 more

To make these work I had to get to jump through the following hoops (and run in prod mode):

Play.classes.add(new ApplicationClasses.ApplicationClass(name));
Class aClass = Play.classloader.loadClass(name);

Method declaredMethod = Play.classloader.loadClass(Invoker.class.getName()).getDeclaredMethod(“invoke”, Invoker.Invocation.class);

Future f = (Future) Java.invokeStatic(declaredMethod, new Object[]{(Invoker.Invocation) aClass.newInstance()});
f.get();

where name in the fully qualified name of the play invocation I want to run. Urg

]]>