LayoutAction should prepare public render parameters for all portlets on the current Layout

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.0.0 DXP FP19, 7.0.3 CE GA4, 7.0.0 DXP SP4, 7.0.X EE, Master
• Component/s: None
• Labels:
  • fw_code_review
  • liferay-digital-enterprise-70-sp4
  • liferay-fixpack-de-19-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Sprint: Daenerys Targaryen
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/49232

Problem Background

When MimeResponse.createActionURL().toString() or MimeResponse.createRenderURL().toString() is called, Liferay Portal's PortletURLImpl.toString() method will append the "p_p_id" URL parameter for the current portlet (the target portlet of the URL). If there are any public render parameters set, each one will be appended to the URL with the "p_r_p_" prefix. When the browser dispatches a request to the ActionURL/RenderURL, Liferay Portal will set the value(s) of each public render parameter, provided that the "p_p_id" parameter is present in the URL.

The problem is that there is no way to specify a public render parameter on a Liferay Portal page URL in which there is no specific target portlet. In other words, it is not possible to simply specify a URL like http://localhost:8080/web/guest?p_r_p_myPRP=123" and expect the portlets on the page to receive the value of "1234" for the "myPRP" public render parameter.

Steps to Reproduce

1. Deploy the attached com.liferay.issue.lps72742.portlet.war artifact to $LIFERAY_HOME/deploy

2. Add the "lps72742-a", "lps72742-b", and "lps72472-c" portlets to a portal page

3. Reload the page

4. Append "?p_r_p_myPRP=123" to the end of the URL in the browser's address bar and press enter.

Expected Results

The "lps72742-a" and "lps72742-c" portlets should indicate:

Current myPRP value=123

Also, the "lps72742-b" portlet should indicate:

Current myPRP value=null

Actual Results

All three portlets indicate:

Current myPRP value=null