JSR 286 PORTLET TUTORIAL PDF
This JSR development tutorial shows how to master request-response programming using the PortletRequest and PortletResponse objects of the Portlet JSR (Portlet ) defines a lifecycle for events, so that eventing is name as defined in the previous code example in the portlet section of the file. Portlet Tutorial, Java Portlet, Portlet Example, Java Portlet Tutorial, What is Portlet , JSR has introduced the using of annotations for controlling things were.
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Compared to servlets, portlets also have some other key differences. This is the mandatory descriptor files for portlets.
For example, a page in a community site could have a calendar portlet for community events, an announcements portlet for important announcements, and a bookmarks portlet for links of interest to the community. Maven versions can be downloaded from maven. Deploying your first Portlet.
The three states defined by the JSR specification are:. Here the parameter is retrieved through an action URL. A portlet can have tutodial view modes.
This lets a portlet serve dynamic content without running the Render phase on all portlets on a page. Page layout tags let you create layouts using Bootstrap 3 within your portlets. The value of yourname is kept to make it available in the rendering phase. The portlet API provides a convenient implementation of this interface. Liferay Portal also contains an OSGi runtime. Using the portlet tag library to generate links to the portlet in different ways.
According to the Portlet Specification, normally there are three steps in setting up a portlet filter:. In the example above the title would be Simplest Hello World Portlet. A parameter is also added directly to the URL.
When you develop portlets for Liferay Portal, you can leverage all the features defined by the portlet specification. The configuration is slightly different from a JSP application. Instead of printing the url the portlet: For example, a portlet application might portlwt a portlet descriptor as follows: This section shows you how to develop portlets using the following frameworks and techniques:.
The portlet is provided along with the source in the IBM Portlet Samples package, which is available from the portlet catalog by searching for navcode 1WPZ.
Lortlet can be placed on pages by users or portal administrators, who can place several different portlets on a single page. With that said, you can use a variety of technologies to develop portlets that run on Liferay Portal.
Creating a simple portlet
The following shows the minimum elements tuutorial for the standard portlet deployment descriptor. For more information, see The XML configuration interface. With the XML configuration below, the filter ApplicationMonitoringFilter involves in request handling on any deployed portlet. InJava Portlet Specification 2. You can place multiple portlets on a single page. Therefore, the portal server copies was. Portlet calls happen in one or two phases.
Portlets – Liferay – Liferay Developer Network
InJava Portlet Specification 1. Help Provides information to the user as to how to use the portlet. Markup Fragments Portlets are responsible for generating markup fragments, as they are included on a page and are surrounded by other portlets.
If you 2886 a classloading problem, ensure that the required classes are in the appropriate classpath according to the classloading hierarchy.
These modes need to be defined in the portlet. The portlet information directory is not part of the public document tree of the application. Portlets instead access a javax. Hello World provides the fewest methods required for a portlet. One key difference is that portlets run in a portion of the web page.
Creating a simple portlet
The portlet takes up an entire page. The compiled Java class implementing javax. If you are familiar with the web. Portlets handle requests in multiple phases. You can set up the run time environment for debugging portlets on the local development machine or on a remote server.
This sample is used in the following examples. Override the doView method as in the first tutorial. In the following graphic runtime classpath patches RCP is located at the top of the hierarchy.
If an installed portlet application includes a class loader, the portlet application class loader is an application class loader ACx under WebSphere Portal Express.
A sample portlet called Jsg is located in the examples directory at the root of your GateIn 3.