This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
I have to send an arraylist from one portlet to another portlet on the same page usign Portlet messaging in IBM API. But using IBM portlet API, i can only send a string message. Is there any way to send an object of type arraylist or hashmap using portlet messaging?