CODEWITHSUNDEEP
liferayclassloaderportletliferay-6
madoke
madoke

Reputation: 873

Sending custom objects across portlets in liferay

I'm having serious issues trying to send share custom objects between portlets in liferay. I have a Hook Plugin, with a servlet filter, which loads an object of Type MyCustomClass and inserts it into the request object as a parameter.

When i try to read this object in a portlet's render() i get a ClassCastException, though i am casting the object to the same class.

I understand that liferay plugins have different contexts, and i already tried to change the classloader before loading the object in the bean and portlet like this: 

ClassLoader portalcl = PortalClassLoaderUtil.getClassLoader();
ClassLoader currentcl = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(portalcl);

//do my stuff

Thread.currentThread().setContextClassLoader(currentcl);

however, it did not solved the problem, and the only way i found to solve the problem is to serialize the object into a json string, and deserialize it whenever i need it.

Isn't this kinda lame ? Does anyone know a better solution ?

Regards, DS

Upvotes: 2

Views: 1209

Answers (1)

Nick Roth
Nick Roth

Reputation: 3077

It sounds like the main problem you're seeing is that two different class loaders are loading the class which techncally makes them different classes (which it seems like you've already determined).

I haven't used LifeRay much but this has been a problem I've seen on other platforms as well. We were using WebSphere and solved this problem by putting the common MyCustomClass into a shared library that was on the server classpath. This way the server will load the class and make it available to all applications on the server through the server's single classloader. If you let each application load the class then you'll keep seeing this exception.

Upvotes: 4

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