JSF Ajax事件延迟 [英] JSF ajax event delay

问题描述

我想用JSF 2为列表实现一个实时过滤器，但是当使用keyup事件时，会将如此多的请求发送到服务器.代码如下:

I want to implement a live filter for a list with JSF 2 but when using keyup event so many requests are being sent to the server. The code looks like:

<h:inputText id="filter_input" value="#{bean.filterText}">
    <f:ajax event="keyup" listener="#{bean.filter}" 
        render="@form:list" execute="@this" />
</h:inputText>

推荐答案

f:ajax增加了对从JSF 2.2开始的ajax事件延迟的支持.只需将其作为属性包含其值(以毫秒为单位)即可:

f:ajax has added support for ajax event delay starting from JSF 2.2. Just include it as an attribute with its value in miliseconds:

<f:ajax event="keyup" delay="1000" listener="#{someBean.doSomething}"
    render="somefield" execute="@this" />

另请参见:

• Primefaces Keyup事件延迟
• Richfaces a4j事件排队
• 为复选框组延迟JSF AJAX侦听器
• JSF 2.1 Ajax自动完成+仅在用户停止键入后服务器搜索

• Primefaces keyup event delay
• Richfaces a4j event queuing
• Delay a JSF AJAX listener for checkbox group
• JSF 2.1 Ajax autocomplete + server search only after user stops typing

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