PrimeFaces partial input validation

PrimeFaces provides a very nice and easy way to do partial input validation of forms.

<h:form>
    <p:inputText value="#{bean.name}" id="name">
        <p:ajax event="blur" process="@this" update="nameMsg" />
    <p:message for="name" id="nameMsg"/>
</h:form>

The validation constraints can either be defined the classic JSF-way (not recommended) or using JSR303 Bean Validation Annotations.
But keep in mind if you have any cross-validation, this could lead to failed validations, as there is only the one inputText processed.