Tag: programming

Liferay diaries: Help! My form post parameters are empty!

While hacking a Spring & Liferay prototype, I'm suddenly wondering about why during a form submission there are no parameters (not even empty or null) submitted by the form. Turns out that I got bitten once more by the two phases of the portlet lifecycle [1] and naivly were handling form submission in the handleRenderRequest … Continue reading Liferay diaries: Help! My form post parameters are empty! →

Liferay diaries: Directing between different portlets on different pages

In my latest project I've came across the following UI construct: A portlet with a search form displays results. When the user clicks on one of the result entries, a detail view should be shown which however resides in a different portlet... on a different page. Surprisingly, the solution revolves around craftly constructing the right … Continue reading Liferay diaries: Directing between different portlets on different pages →

Liferay diaries: Multiple spring form controllers in a portlet

Now there comes a moment in the life of every portlet author, be it a seasoned veteran (like jstam) or a fresh starter like myself when you need to do implement something out of the ordinary for which portlets were not intended. Last week we had to scetch up an all-in-one portlet that could display … Continue reading Liferay diaries: Multiple spring form controllers in a portlet →

Liferay diaries: Serving resources from a portlet with Spring

So there comes the day when you finally have to serve an image, pdf or excel report generated by a portlet or, more elegantly, by a Spring controller backing a portlet. At a first take this may seem impossible since the markup produced by a portlet is embedded in the markup (i.e. HTML) of all … Continue reading Liferay diaries: Serving resources from a portlet with Spring →