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问题:

I'm having trouble displaying the deploy-java button on ajax rerender

<h:form id="deployJavaForm" rendered="#{myBean.shouldRender}">
<h:outputScript library="js" name="http://java.com/js/deployJava.js" target="head" />
<script type="text/javascript">
    deployJava.createWebStartLaunchButton('blah.jnlp', '1.7.0');
</script>
</h:form>

when

myBean.shouldRender == true

and the form is updated the only thing being displayed (on a white page) is the deployJava-button and the request is left hanging. if shouldRender is true on the initial request, page and button is displayed correctly. Im using primefaces in case it can help.

What I want to do is to have the button to be displayed correctly regardless if its part of a ajax rerender or a complete initial request.

Update: I did my homework and created a minimal example that still reproduces the problem. It seems I still get the same problems regardless if script declaration is in head or in body (I have copy of deployJava.js in resources/js)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:p="http://primefaces.org/ui">
<h:head>
    <!-- <script type="text/javascript" src="http://java.com/js/deployJava.js" />-->
</h:head>
<h:body>
    <h:outputScript library="js" name="deployJava.js" target="head" />
    <h:form id="djForm">
        <script type="text/javascript">
            deployJava.createWebStartLaunchButton(
                    'test.jnlp', '1.7.0');
        </script>
        <p:commandButton value="update" update="djForm" />
    </h:form>
</h:body>
</html>

edit: (specialgems) below test give same problem as observed earlier.

<h:outputScript>
deployJava.createWebStartLaunchButton(
                'test.jnlp', '1.7.0');
</h:outputScript>

edit: added picture

after click of update button, only deployJava button is rendered and page is loading

edit (daniel): both on success and oncomplete give same behaviour :(

<h:form id="djForm">
    <h:outputScript>
        function abcefg() {
            deployJava.createWebStartLaunchButton('test.jnlp', '1.7.0');
        }
    </h:outputScript>
<p:commandButton value="update" update="djForm" onsuccess="abcefg()" />
</h:form>

回答1:

Alternatively to using js and css visibility described in my comment you can write own composite button component. Using Firebug you can investigate which markup is generated by the deployJava.createWebStartLaunchButton script and add it by yourself statically. So your component could be:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:composite="http://java.sun.com/jsf/composite">
<head>
<title>deployJava Button component</title>
</head>
<body>

    <composite:interface>
        <composite:attribute name="version" required="true"
            type="java.lang.String" />
        <composite:attribute name="url" required="true"
            type="java.lang.String" />
    </composite:interface>

    <composite:implementation>
        <a onmouseover="window.status=''; return true;"
            href="javascript:if (!deployJava.isWebStartInstalled(&quot;#{cc.attrs.version}&quot;)) {if (deployJava.installLatestJRE()) {if (deployJava.launch(&quot;#{cc.attrs.url}&quot;)) {}}} else {if (deployJava.launch(&quot;#{cc.attrs.url}&quot;)) {}}"><img
            border="0" src="//java.com/js/webstart.png" /></a>
    </composite:implementation>
</body>
</html>

so your page will be:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:comps="http://java.sun.com/jsf/composite/comps"
    xmlns:p="http://primefaces.org/ui">
<h:head>
    <!-- <script type="text/javascript" src="http://java.com/js/deployJava.js" />-->
</h:head>
<h:body>
    <h:outputScript library="js" name="deployJava.js" target="head" />
    <h:form id="djForm">
       <comps:deployJavaButton version="1.7.0" url="test.jnlp" rendered="#{myBean.shouldRender}" />

        <p:commandButton value="update" update="djForm" />
    </h:form>
</h:body>
</html>

The main idea is to avoid executing button creation script twice and more.

回答2:

May be using h:panelGroup instead of h:form will help. Something like that:

<h:form id="djForm">
  <h:panelGroup rendered="#{myBean.shouldRender}">
    <script type="text/javascript">
        deployJava.createWebStartLaunchButton(
                'test.jnlp', '1.7.0');
    </script>
  </h:panelGroup>
  <p:commandButton value="update" update="djForm" />
</h:form>