Home » Author Archives: Oleg Varaksin

Author Archives: Oleg Varaksin

A way to read properties with variable interpolation

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Recently, I tried to define and read a global properties in an application server. The benefit of such property configured in the application server – it can be shared across all web applications that are deployed on this server. Every deployed application can read the same property which is configured just once at one place. What I tried to do ...

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Caching of web content with Spring’s cache manager

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I this post, I would like to show basics how to cache and manage the caching of web content with Spring’s CacheManager, @Cacheable and JMX annotations. Imagine a web shop which fetches some content, such as header, footer, teasers, main navigation, from a remote WCMS (Web Content Management System). The fetching may e.g. happen via a REST service. Some content ...

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Extending PrimeFaces CSV with Bean Validation

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Some of you already know that me and my co-author Mert Çalışkan are working on the 2. edition of the PrimeFaces Cookbook. The Packt Publishing allowed me to publish a small excerpt from one recipe of the new chapter “Client Side Validation”. It would help in letting the readers know about the book’s content. In this blog post, I would ...

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Building dynamic responsive multi-level menus with plain HTML and OmniFaces

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Recently, I had to create a responsive multi-level menu with JSF 2.2. Requirements: the menu should:                   be created with dynamic structure from backend be responsive, i.e. desktop- and mobile-friendly have submenu items with navigation links support touch events support keyboard accessibility PrimeFaces’ menus were not a choice. They can indeed be ...

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Don’t repeat expressions in facelets

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Have you ever seen repeated EL expressions in JSF like this one?                     <h:inputText value="#{oneBean.name}" rendered="#{anotherBean.showPerson}"/> <h:inputText value="#{oneBean.birthday}" rendered="#{anotherBean.showPerson}"/> <h:selectOneMenu value="#{oneBean.children}" style="#{anotherBean.showPerson ? 'display:block' : 'display:none'}"/> usw. Another example: <ui:include src="/include/somesnippet.xhtml"> <ui:param name="age" value="#{someBean.isMan(person) ? 63 : 60}"/> <ui:param name="money" value="#{someBean.isMan(person) and someBean.getCountry(person) eq 'de' ? 1000 : 900}"/> <ui:param name="big" ...

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WAI-ARIA support for AutoComplete widget

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In this post I would like to discuss the accessibility for an AutoComplete widget. A typically AutoComplete widget provides suggestions while you type into the field. On my current work I implemented an JSF component on basis of Twitter’s Typeahead – a flexible JavaScript library that provides a strong foundation for building robust typeaheads. The Typeahead widget has a solid ...

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Brand new JSF components in PrimeFaces Extensions

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The PrimeFaces Extensions team is glad to announce several new components for the upcoming 3.0.0 main release. Our new committer Francesco Strazzullo gave a “Turbo Boost” for the project and brought at least 6 JSF components which have been successfully intergrated! The current development state is deployet on OpenShift – please look the showcase Below is a short overview about ...

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How to get JSON response from JSF?

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Many JavaScript widgets expect data and options in JSON format. Nowadays, it is really easy to choose a cool widget and wrap it in a composite component. But the first question is how to send an AJAX request and to recieve a response in a proper JSON format. This question is often raised by JSF users. All that you need ...

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How to implement a custom password strength indicator in JSF

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Verifying password strength using JavaScript is a common task. In this post, I will show how to add a password strength indicator to an JSF based web application. The password component in PrimeFaces already has a feedback indicator of the password strength, but it has two major shortcomings: Feedback indicator is not responsive (fix width, not mobile friendly, etc.) Rules ...

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