Examples of com.metaparadigm.jsonrpc.JSONRPCBridge$CallbackData

com.metaparadigm.jsonrpc.JSONRPCBridge
This class implements a bridge that unmarshalls JSON objects in JSON-RPC request format, invokes a method on the exported object, and then marshalls the resulting Java objects to JSON objects in JSON-RPC result format.
An instance of the JSONRPCBridge object is automatically placed in the HttpSession object registered under the attribute "JSONRPCBridge" by the JSONRPCServlet.
The bridge is implemented as session specific to improve the security of applications by allowing exporting of object methods only to specific HttpSessions.
To use the bridge to allow calling of Java methods you can easily access the HttpSession specific bridge in JSP using the usebean tag. eg.
<jsp:useBean id="JSONRPCBridge" scope="session" class="com.metaparadigm.jsonrpc.JSONRPCBridge" />
Then export the object you wish to call methods on. eg.
JSONRPCBridge.registerObject("test", testObject);
This will make available all methods of the object as test.<methodnames> to JSON-RPC clients. This method should generally be performed after an authentication check to only export specific objects to clients that are authorised to use them.
There exists a global bridge singleton object that will allow exporting objects to all HTTP clients. This can be used for registering factory classes although care must be taken with authentication as these objects will be accessible to all clients.

            cdata.write(buf, 0, ret);
        }


        // Find the JSONRPCBridge for this session or create one
        // if it doesn't exist
        JSONRPCBridge json_bridge = TurbineJsonRpc.getBridge(data.getSession());


        // Process the request
        Object json_res = TurbineJsonRpc.processCall(cdata, json_bridge, request);


        PrintWriter out = new PrintWriter(

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         * Create a new bridge for every request to avoid all the problems with 
         * JSON-RPC-Java storing the bridge in the session
         */
        HttpSession session = request.getSession();


        JSONRPCBridge jsonrpcBridge = new JSONRPCBridge();
        jsonrpcBridge.registerObject("Service", serviceInstance, serviceInterface);
        session.setAttribute("JSONRPCBridge", jsonrpcBridge);
        
        org.json.JSONObject jsonReq = null;
        com.metaparadigm.jsonrpc.JSONRPCResult jsonResp = null;
        try {
            jsonReq = new org.json.JSONObject(requestData);
        } catch (java.text.ParseException e) {
            throw new RuntimeException("Unable to parse request", e);
        }


        String method = jsonReq.getString("method");
        if ((method != null) && (method.indexOf('.') < 0)) {
            jsonReq.putOpt("method", "Service" + "." + method);
        }


        // invoke the request
        jsonResp = jsonrpcBridge.call(new Object[] {request}, jsonReq);


        return jsonResp.toString().getBytes("UTF-8");
    }

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         * Create a new bridge for every request to avoid all the problems with 
         * JSON-RPC-Java storing the bridge in the session
         */
        HttpSession session = request.getSession();


        JSONRPCBridge jsonrpcBridge = new JSONRPCBridge();
        jsonrpcBridge.registerObject("Service", serviceInstance, serviceInterface);
        session.setAttribute("JSONRPCBridge", jsonrpcBridge);
        
        org.json.JSONObject jsonReq = null;
        com.metaparadigm.jsonrpc.JSONRPCResult jsonResp = null;
        try {
            jsonReq = new org.json.JSONObject(requestData);
        } catch (java.text.ParseException e) {
            throw new RuntimeException("Unable to parse request", e);
        }


        String method = jsonReq.getString("method");
        if ((method != null) && (method.indexOf('.') < 0)) {
            jsonReq.putOpt("method", "Service" + "." + method);
        }


        // invoke the request
        jsonResp = jsonrpcBridge.call(new Object[] {request}, jsonReq);


        return jsonResp.toString().getBytes("UTF-8");
    }

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            cdata.write(buf, 0, ret);
        }


        // Find the JSONRPCBridge for this session or create one
        // if it doesn't exist
        JSONRPCBridge json_bridge = TurbineJsonRpc.getBridge(data.getSession());


        // Process the request
        Object json_res = TurbineJsonRpc.processCall(cdata, json_bridge, request);


        PrintWriter out = new PrintWriter(

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     * @param context WikiContext to find the bridge in
     * @return A JSON RPC Bridge
     */
    // FIXME: Is returning the global bridge a potential security threat?
    private static JSONRPCBridge getBridge(WikiContext context) {
        JSONRPCBridge bridge = null;
        HttpServletRequest req = context.getHttpRequest();


        if (req != null) {
            HttpSession hs = req.getSession();


            if (hs != null) {
                bridge = (JSONRPCBridge) hs.getAttribute(JSONRPCBRIDGE);


                if (bridge == null) {
                    bridge = new JSONRPCBridge();


                    hs.setAttribute(JSONRPCBRIDGE, bridge);
                }
            }
        }


        if (bridge == null) {
            bridge = JSONRPCBridge.getGlobalBridge();
        }
        bridge.setDebug(false);


        return bridge;
    }

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     * The JSONRPCBridge object will go away once the session expires.
     *
     * @param session The HttpSession which was created.
     */
    public static void sessionCreated(HttpSession session) {
        JSONRPCBridge bridge = (JSONRPCBridge) session.getAttribute(JSONRPCBRIDGE);


        if (bridge == null) {
            bridge = new JSONRPCBridge();


            session.setAttribute(JSONRPCBRIDGE, bridge);
        }


        WikiJSONAccessor acc = new WikiJSONAccessor();


        bridge.registerCallback(acc, HttpServletRequest.class);


        for (Iterator i = c_globalObjects.values().iterator(); i.hasNext(); ) {
            CallbackContainer cc = (CallbackContainer) i.next();


            bridge.registerObject(cc.m_id, cc.m_object);
        }


    }

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     *  @return A JSON RPC Bridge
     */
    // FIXME: Is returning the global bridge a potential security threat?
    private static JSONRPCBridge getBridge( WikiContext context )
    {
        JSONRPCBridge bridge = null;
        HttpServletRequest req = context.getHttpRequest();
        
        if( req != null )
        {
            HttpSession hs = req.getSession();
            
            if( hs != null )
            {
                bridge = (JSONRPCBridge)hs.getAttribute(JSONRPCBRIDGE);
                
                if( bridge == null )
                {
                    bridge = new JSONRPCBridge();
                
                    hs.setAttribute(JSONRPCBRIDGE, bridge);
                }
            }
        }
        
        if( bridge == null) bridge = JSONRPCBridge.getGlobalBridge();
        bridge.setDebug(false);
        
        return bridge;
    }

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     *  
     *  @param session The HttpSession which was created.
     */
    public static void sessionCreated( HttpSession session )
    {
        JSONRPCBridge bridge = (JSONRPCBridge)session.getAttribute(JSONRPCBRIDGE);
        
        if( bridge == null )
        {
            bridge = new JSONRPCBridge();
        
            session.setAttribute( JSONRPCBRIDGE, bridge );
        }


        WikiJSONAccessor acc = new WikiJSONAccessor();
        
        bridge.registerCallback( acc, HttpServletRequest.class );
        
        for( Iterator i = c_globalObjects.values().iterator(); i.hasNext(); )
        {
            CallbackContainer cc = (CallbackContainer) i.next();
       
            bridge.registerObject( cc.m_id, cc.m_object );
        }


    }

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        JSONRPCBridge.getGlobalBridge().registerObject(key, value);
    }


    public void registerObject(HttpSession session, String key, Object value)
    {
        JSONRPCBridge json_bridge = getBridge(session);
        json_bridge.setDebug(DEBUG);
        json_bridge.registerObject(key, value);
    }

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        json_bridge.registerObject(key, value);
    }


    public JSONRPCBridge getBridge(HttpSession session)
    {
        JSONRPCBridge json_bridge = (JSONRPCBridge) session.getAttribute(JSON_BRIDGE_KEY);
        if (json_bridge == null)
        {
            json_bridge = new JSONRPCBridge();
            session.setAttribute(JSON_BRIDGE_KEY, json_bridge);
        }
        return json_bridge;
    }

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