Question

Portlets have an EDIT mode, and this is the way we can parametrize them.

My question is what it the best way to parametrize a portlet exactly at the moment its loaded, programmatically.

For example: I want to get Liferay to load two instances of the portlet with a certain ID, one with paramA, second with paramB.

Answer 1

To load different parameters (better known in Liferay as “Portlet Preferences”) you can use PortletPreferences to store and retrieve different parameters,

PortletPreferences preferences =
    PortletPreferencesFactoryUtil.getPortletSetup(
        request, portletId);

The factory takes 2 parameters,

• Request – The request.
• PortletId – The ID of your portlet, (for example “name_WAR_myportlet_INSTANCE_ABCD”).

With this object you can get parameters:

String myValue = preferences.getValue("my-value");

And you can store values:

preferences.setValue("my-value", "this-value");
preferences.store();