从支持bean更新PrimeFaces dataTable [英] Update PrimeFaces dataTable from backing bean

问题描述

我在bean中使用schedule(Timer)，当员工注册从指纹设备获取数据时会更新变量.当bean中的变量更新时，我需要从支持bean更新jsf中的组件.我尝试使用primefaces民意调查组件，但每次都会更新该组件.

I use schedule(Timer) in bean which update variable when employees enrolling which get data from fingerprint device. I need to update component in jsf from backing bean when variable in bean updated. I try to use primefaces poll component but it update component every time.

推荐答案

假设您将从指纹设备API使用侦听器调用Java方法，而从ManagedBean可以使用

Assuming you'll be calling a Java method using Listener from Fingerprint device API, and from ManagedBean you can update any Primefaces Component using RequestContext.

RequestContext.getCurrentInstance().update("ID_OF_YOUR_DATATABLE")

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