Developing Portlets

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This document explains the way to setup a portlet.

Entities Involved
- How To Setup
- Screen Setup

Entities Involved

PortletCategory – Used to define category for portlets.
PortalPortlet – All the information about a portlet is stored here.
PortletPortletCategory – This associates the portlets with the logical categories.
PortalPage – A portal page. Every Portal Page has a owner associated to it (userLoginId). To move a portlet from one Portal Page to another can be done
- If the logged in user is the owner of the portal page or
- If the portal page is a system page. (userLoginId="NA")
PortalPageColumn – The number of the columns can be defined for a portal page.
PortalPagePortlet – The portlets that belong to a portal page.
PortalPageAndUserLogin – (View entity PortalPage + UserLoginSecurityGroup) - The portal pages that are accessible to a user if he belongs to certain security group.
PortletAttribute – This defines all the attributes of a portlet. For example, to display a portlet, it needs a roleTypeId (attrName) = PLACING_CUSTOMER (attrName).

How To Setup

Here I am taking an example from OOTB implementation to show how do we setup a portlet.
The reference file here is PartyPortletData.xml Data preparation needs to be done as shown bellow this is all done for viewprofile page in partymgr:

Following is the first portlet with its all the associations and details:

<PortletCategory portletCategoryId="PROFILE" description="Profiles"/><PortalPortlet portalPortletId="party"    portletName="Party Info"    screenName="Party"    screenLocation="component://party/widget/partymgr/ProfileScreens.xml"    description="General information about a person or party group"    screenshot="/images/portlets/party.png"/><PortletPortletCategory portalPortletId="party" portletCategoryId="PROFILE"/><PortalPage portalPageId="PartyProfile" sequenceNum="0" portalPageName="Party Profile Portal Page" description="Party profile page using flexible Portal technology" ownerUserLoginId="_NA_"/><PortalPageColumn portalPageId="PartyProfile" columnSeqId="00001" columnWidthPercentage="50"/><PortalPageColumn portalPageId="PartyProfile" columnSeqId="00002"/><!-- no width in pixels or percent, use the rest of the space available --><PortalPagePortlet portalPageId="PartyProfile" portalPortletId="party" portletSeqId="00001" columnSeqId="00001" sequenceNum="0"/>

Screen Setup

(OFBiz Trunk)
Now following code works in the screen to have portlets in action:
Trace the screen "viewprofile" from /party/widget/partymgr/PartyScreens.xml. We need to set portalPageId in parameters and include generic screen PortalPageScreen from component://common/widget/CommonScreens.xml
Which is as follows(Reference commit in OFBiz trunk rev. 900156):

<screen name="PortalPageScreen">    <section>        <actions>            <entity-one entity-name="PortalPage" value-field="portalPage"/>            <get-related value-field="portalPage" relation-name="PortalPageColumn" list="portalPageColumns"/>            <entity-and entity-name="PortalPagePortletView" list="portalPagePortlets">                <field-map field-name="portalPageId" from-field="portalPage.portalPageId"/>            </entity-and>                    </actions>        <widgets>            <platform-specific>                <html><html-template location="component://common/webcommon/portal/showPortalPage.ftl"/></html>            </platform-specific>        </widgets>    </section></screen>

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