score:7

Accepted answer

In the example below the the p:commandButton starts the ajax request. The JSON object you want to use can be stored in the h:inputHidden field. When the p:commandButton completes the javascript function is called to update the chart. The javascript function will be able to access the JSON object from the h:inputHidden field.

xhtml

<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:p="http://primefaces.prime.com.tr/ui">

    <h:head>
        <script type="text/javascript">           
            function dosomething() {
                var value = jQuery("#beanvalue").attr('value');
                alert(value);
            }
        </script>
    </h:head>
    <h:body>
        <h:form prependId="false" >
            <p:commandButton value="update" action="#{testBean.update}" update="beanvalue" oncomplete="dosomething();" />
            <h:inputHidden value="#{testBean.output}" id="beanvalue"  />
        </h:form>
    </h:body>
</html>

Bean

import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;

@ManagedBean
@ViewScoped
public class TestBean {

    private String output;

    public TestBean() {
        output = "1";
    }

    public void update() {
        output += "1";
    }

    public String getOutput() {
        return output;
    }

    public void setOutput(String output) {
        this.output = output;
    }
}

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