Johann Reyes wrote:
Hello Ben
You are using JSON-RPC, have you tried DWR? In my case I'm using it, it
works fairly well, but I'm wondering how you implement JSON-RPC with
qooxdoo.
Here is a example how I implement dwr with qooxdoo:
Whilst DWR is a good project, I have adopted JSON-RPC because it's a
formal standard with broader server-side platform support. I consider
this important because frameworks like Qooxdoo provide a very welcome
opportunity to collaborate with non-Java programmers. Collaboration
beyond the Java community not only encourages the development of a
broader community and critical mass of server agnostic projects like
Qooxdoo, but it also brings different design approaches together and
this benefits everyone.
In terms of Spring integration with JSON-RPC, I wrote a Spring
BeanPostProcessor. I could polish it some more (like named beans in
addition to a marker interface), but basically it's shown below. It
locates any bean in the application context which implements the
JsonExportable marker interface.
public interface JsonExportable {}
public class JsonBridgeBeanPostProcessor implements BeanPostProcessor {
public Object postProcessBeforeInitialization(Object obj, String
beanName) throws BeansException {
return obj;
}
public Object postProcessAfterInitialization(Object obj, String
beanName) throws BeansException {
if (obj instanceof JsonExportable) {
JSONRPCBridge.getGlobalBridge().registerObject(beanName, obj);
}
return obj;
}
}
To use JSON-RPC in Java, go download it from
http://oss.metaparadigm.com/jsonrpc/, then add the JAR to your classpath
and add to web.xml:
<servlet>
<servlet-name>com.metaparadigm.jsonrpc.JSONRPCServlet</servlet-name>
<servlet-class>com.metaparadigm.jsonrpc.JSONRPCServlet</servlet-class>
<init-param>
<param-name>auto-session-bridge</param-name>
<param-value>0</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>com.metaparadigm.jsonrpc.JSONRPCServlet</servlet-name>
<url-pattern>/JSON-RPC</url-pattern>
</servlet-mapping>
Client-side use it amazingly simple. There is a jsonrpc.js you need to
include, and then you simply execute:
QxSettings.serverUrl = "/acegi-ajax/JSON-RPC";
var jsonrpc = new JSONRpcClient(QxSettings.serverUrl);
jsonrpc.someBeanOnServer.someMethodOnTheBean();
I am not using the JSON-RPC Java implementation's session-based support,
as I use Acegi Security for security instead.
Cheers
Ben
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