I have been trying to get Shale Remoting working using shale v 1.03
I first tried to follow the guide at:
http://shale.apache.org/features-remoting.html
I corrected the example to the following:
First adding methods to be called by client-side Ajax to the "welcome" bean
(WelcomeBean.java), registered in faces-config.xml with request scope :
package org.apache.shale.blank;
import java.io.IOException;
import java.util.Date;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.apache.shale.remoting.faces.ResponseFactory;
import org.apache.shale.view.AbstractViewController;
public class WelcomeBean extends AbstractViewController {
...
public void validateUsername() {
FacesContext context = FacesContext.getCurrentInstance();
String username = (String)context
.getExternalContext()
.getRequestParameterMap().get("username");
if( ! "Joe".equals(username))
writeResponse(context, "Sorry, that's an unathorized username");
}
private void writeResponse(FacesContext context, String text) {
ResponseWriter writer =
(new ResponseFactory()).getResponseWriter(context,
"text/plain");
try {
writer.writeText(text, null);
writer.close();
context.responseComplete();
} catch (IOException e) {
e.printStackTrace();
}
}
The method was refactored a bit, closing the writer and calling
reponseComplete() as recommended in
http://shale.apache.org/shale-remoting/apidocs/index.html
For a text response, acquire a ResponseWriter instance and use its methods,
just as a Renderer would:
FacesContext context = FacesContext.getCurrentInstance();
ResponseWriter writer = (new
ResponseFactory()).getResponseWriter(context, "text/xml");
writer.startDocument();
...
writer.endDocument();
writer.close();
Before returning, the dynamic logic should call responseComplete() on the
FacesContext instance for the current request, to bypass the remaining
phases of the JavaServer Faces request processing lifecycle.
I then went on to configure web.xml with appropriate mappings after the
Welcome File List entry:
<context-param>
<param-name>
org.apache.shale.remoting.CLASS_RESOURCES
</param-name>
<param-value>
/static/*:org.apache.shale.remoting.impl.ClassResourceProcessor
</param-value>
</context-param>
<context-param>
<param-name>
org.apache.shale.remoting.DYNAMIC_RESOURCES
</param-name>
<param-value>
/dynamic/*:org.apache.shale.remoting.impl.MethodBindingProcessor
</param-value>
</context-param>
<context-param>
<param-name>
org.apache.shale.remoting.WEBAPP_RESOURCES
</param-name>
<param-value>
/webapp/*:org.apache.shale.remoting.impl.WebResourceProcessor
</param-value>
</context-param>
I then changed welcome.jsp to the following, to try different URL patterns
for grabbing a resource:
<%@ taglib prefix="f" uri="http://java.sun.com/jsf/core"; %>
<%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"; %>
<f:view>
<[EMAIL PROTECTED] file="messages.jspf"%>
<html>
<head>
<title><h:outputText value="#{messages['welcome.title']}"/></title>
<script type="text/javascript" src="js/prototype.js"/>
<script type="text/javascript" src=""js/rico.js""></script>
<script type="text/javascript">
function hideMessage() {
$("message").style.display = "none"; // the $ is Prototype's
shorthand for window.document.getElementById()
}
// dynamic/welcome/validateUsername.faces
function validateUsername(username) {
new Ajax.Request(
"http://localhost:8081/myShaleApp/dynamic/welcome/validateUsername.faces";,
{
method: "post",
parameters: "username=" + username,
onComplete: showMessage
}
);
}
function getStaticRes() {
new Ajax.Request(
"http://localhost:8081/myShaleApp/static/resource/hello.txt.faces";,
{
method: "post",
onComplete: showMessage
}
);
}
function getStaticRes2() {
new Ajax.Request(
"/static/resource/hello.txt.faces",
{
method: "post",
onComplete: showMessage
}
);
}
function getWebAppRes() {
new Ajax.Request(
"http://localhost:8081/myShaleApp/webapp/resource/hello.txt.faces";,
{
method: "post",
onComplete: showMessage
}
);
}
function getWebAppRes2() {
new Ajax.Request(
"/webapp/resource/hello.txt.faces",
{
method: "post",
onComplete: showMessage
}
);
}
function showMessage(xhr) {
var msg = $("message");
msg.style.display = "inline";
msg.style.color = "red";
msg.innerHTML = xhr.responseText; // set the innerHTML of the
message DIV
}
</script>
</head>
<body>
<p>
<h1>Hello World</h1>
<h:outputText value="#{messages['welcome.prompt']}"/>
<h:outputText value="#{welcome.timestamp}">
<f:convertDateTime type="both"/>
</h:outputText>
</p>
<h:panelGroup>
<h:commandButton id="staticRes" onclick="getStaticRes();
return false;"/>
<h:commandButton id="webAppRes" onclick="getWebAppRes();
return false;"/>
<h:commandButton id="staticRes2" onclick="getStaticRes2();
return false;"/>
<h:commandButton id="webAppRes2" onclick="getWebAppRes2();
return false;"/>
<h:commandButton id="empty" onclick=""/>
<h:inputText id="username" onfocus="hideMessage();"
onblur="validateUsername(this.value);"/>
<h:inputText id="password"/>
<f:verbatim>
<div id="message" style="display: none;"></div>
</f:verbatim>
</h:panelGroup>
</body>
</html>
</f:view>
The result :(
running mvn deploy on the application and deploying the myShaleApp.war on
Tomcat 5.5.17
Prefixing the URL with http://localhost:8081/myShaleApp/ : getStaticRes(),
getWebAppRes() and the dynamic validateUsername(..)
HTTP 500 - The server encountered an internal error () that prevented it
from fulfilling this request.
Without the prefix: getStaticRes2(), getWebAppRes2()
HTTP 404 - The requested resource (/static/resource/hello.txt.faces) is not
available.
Any ideas about what I have missed in my configuration? How can I turn on
debugging/logging to determine and fix such problems in the future?
Kristian
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