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{{Short description|Pluggable user interface software components}}
'''Portlets''' are [[Pluggable look and feel|pluggable]] [[user interface]] [[software component]]s that are managed and displayed in a [[web portal]]. A portlet responds to requests from a web client and generates dynamic content. A portlet is managed by a '''portlet container'''.

== Description ==
A portlet is a [[Pluggable look and feel|pluggable]] [[user interface]] [[software component]] that is managed and displayed in a [[web portal]],<ref>{{Cite web|url=https://dictionary.cambridge.org/us/dictionary/english/portlet|title=PORTLET | definition in the Cambridge English Dictionary}}</ref><ref>{{Cite web|url=https://support.esri.com/en-us/gis-dictionary/portlet|title=Portlet Definition | GIS Dictionary|website=support.esri.com}}</ref><ref>{{Cite web|url=https://www.pcmag.com/encyclopedia/term/portlet|title=Definition of portlet|website=PCMAG}}</ref> for example an [[enterprise portal]] or a [[web CMS]]. A portlet can [[Web aggregator (disambiguation)|aggregate]] (integrate) and personalize content from different sources within a web page. A portlet responds to requests from a web client with and generates dynamic content.<ref name=":0">{{Cite book |last=Sarin |first=Ashish |url=https://books.google.com/books?id=kTozEAAAQBAJ&dq=Portlet+standard+-java&pg=PT246 |title=Portlets in Action |date=2011-09-15 |publisher=Simon and Schuster |isbn=978-1-63835-236-5 |at=1.5.1 The portlet container |language=en}}</ref>

Portlets produce fragments of [[markup language|markup]]<ref name=":1">{{Cite book |last1=Guo |first1=Yuanbo |url=https://books.google.com/books?id=md_zBwAAQBAJ&dq=Portlet+standard+-java&pg=PA32 |title=Web Information Systems Engineering - WISE 2005 Workshops: WISE 2005 International Workshops, New York, NY, USA, November 20-22, 2005, Proceedings |last2=Jun |first2=Woochun |last3=Kaschek |first3=Roland |last4=Krishnaswamy |first4=Shonati |last5=Pan |first5=Zhengxiang |last6=Sheng |first6=Quan Z. |date=2005-10-24 |publisher=Springer |isbn=978-3-540-32287-0 |page=22 |language=en}}</ref><ref>{{Cite web |date=2019-01-04 |title=Markup languages |url=https://www.ibm.com/docs/en/radfws/9.6.1?topic=portlet-markup-languages |access-date=2024-02-13 |website=www.ibm.com |language=en-us}}</ref> ([[HTML]], [[XHTML]], [[Wireless Markup Language|WML]]) that are aggregated into a portal.<ref name=":2">{{Cite book |last=Sarin |first=Ashish |url=https://books.google.com/books?id=kTozEAAAQBAJ&dq=Portlet+standard+-java&pg=PT246 |title=Portlets in Action |date=2011-09-15 |publisher=Simon and Schuster |isbn=978-1-63835-236-5 |at=1.3 What is a portlet? |language=en}}</ref> Hence, a portlet (or collection of portlets) resembles a [[web-based application]] that is hosted in a [[Web portal|portal]].<ref>{{Cite web |date=2014-10-01 |title=Portlets |url=https://gateway.maine.gov/cognos/documentation/en/ug_cra_c_portlets.html |access-date=2024-02-13 |website=gateway.maine.gov |language=en-us}}</ref> Some examples of portlet applications are [[e-mail]], [[weather forecasting|weather reports]],<ref name=":2" /> [[discussion forum]]s, and [[news]].

=== Portlet containers ===
A portlet is managed by a portlet container.<ref name=":1" /> A portlet container runs portlets, provides them with the required runtime environment, manages their life cycles.<ref name=":0" /> A container also provides persistent storage mechanisms for the portlet preferences.

A portlet container receives requests from the portal to execute requests on the portlets hosted by it. A portlet container sends data to the portal for aggregation, but is not responsible for aggregating the content produced by the portlets; the portal itself handles aggregation.<ref name=":0" /> A portal and a portlet container can be built together as a single component of an application suite or as two separate components of a portal application.

== Standards ==
{{See also|Java Portlet Specification}}
Portlet standards are platform independent [[application programming interface]]s that are intended to enable [[software developer]]s to create portlets that can be [[plug-in (computing)|plugged into]] any portal supporting the standards. An example is the [[Java Portlet Specification]].<ref>{{cite web |title=JSR 362: Portlet Specification 3.0 |url=https://www.jcp.org/en/jsr/detail?id=362}}</ref>

==See also==
* [[Applet]]
* [[Java Portlet Specification]]
* [[Software widget]]

==References==
{{reflist}}

==External links==
{{wiktionary|portlet|position=left}}

[[Category:Web portals]]

Portlet - Revision history

imported>IchSethSinclair: Fixed typo