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java-interview-questions-answers

Multiple dynamic includes with one JSF tag

Every JSF developer knows the ui:include and ui:param tags. You can include a facelet (XHTML file) and pass an object, which will be available in the included facelet, as follows:                 <ui:include ...
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JSF: choice between legacy components and fashionable performance killers

This blog post was originated due to performance issues in one big web application. Everybody optimizes Java code, but it seems nobody try to optimize the JavaScript code. Strange, ...
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Passing complex objects in URL parameters

Imagine you would like to pass primitive data types, complex Java objects like java.util.Data, java.lang.List, generic classes, arrays and everything what you want via URL parameters ...
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JSF – Eager CDI beans

Everybody knows eager managed beans in JSF 2. @ManagedBean has an eager attribute. If eager=’true’ and the scope is application, then this bean must be created when the ...
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GET / POST with RESTful Client API

There are many stuff in the internet how to work with RESTful Client API. These are basics. But even though the subject seems to be trivial, there are hurdles, especially for beginners. In ...
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Configure timeout for CDI conversations

CDI conversation scope is a nice feature when developing JSF applications. Imagine you have large data tables which take a long time to be loaded. You normally don’t want to place ...
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JSF Event-based communication: New-school approach

In the last post, we learnt event-based communication on basis of Observer / Event Listener and Mediator ...
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JSF Event-based communication: Old-school approach

Web applications written in JSF consist of beans which interact among each other. Communication between beans is one of the main design patterns when developing a web application. ...
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Dynamic forms, JSF world was long waiting for

The new PrimeFaces Extensions release 0.5.0 brought a new DynaForm component. Normally, we can build a form quite straightforward by ...
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Custom JSF validator for required fields

JSF components implementing EditableValueHolder interface have two attributes ‘ required’ and ‘ requiredMessage’ ...
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