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Apache Tuscany Docs 2.x
SCA Java binding.jsonrpc
Tuscany supports JSON-RPC as a protcol for use with SCA services by using the <binding.jsonrpc> element in your Application composite. This enables remote web browser clients to easily make RPC style calls to server-side SCA components.
You could use this binding without any configuration, or by providing a specific service URI.
Any JSON-RPC client may be used to access SCA services which use <binding.jsonrpc>, below we are going to describe different ways you could consume the Tuscany JSON-RPC services in your client application.
This script is used by simply including the following tag within the HTML page :
This initializes the proxys for the SCA services which can then be injected into SCA references to make requests to the server-side components. For example, if there was a service named "myService" which had operations "aOnewayRequest" and "anRpcRequest" the scripts in the HTML page could now invoke these operations with the following:
Also see Tuscany Widgets for more details.
After copying the script to your application, it can be used bu simply including the following tag within the HTML page :
This initializes the proxys for the SCA services which can then be used make requests to the server-side components. Based on the scenario described above, below are the to invoke these operations.
In that example 'responseFunction' is the name of a function which is called to process the response and which gets called asynchronously on another thread when the response is avaialble. RPC requests are done this way instead of the simpler "answer = myService.anRpcRequest(args)" to avoid hanging the browser while the (potentially slow) request is being processed. An example of the responseFunction for the previous example is:
Apache Tuscany JSON-RPC services provide built-in support for Dojo RPC. The Dojo toolkit is a popular framework for writing Ajax/Web 2.0 style browser client applications. Tuscany SCA services which use <binding.jsonrpc> will by default support the Simple Method Description (SMD) protocol. SMD is similar to ?wsdl for Web services, entering a service endpoint appended with ?smd will return a SMD descriptor for the service.
Using Tuscany SCA services with Dojo can therefore be as simple as the following:
The JSON-RPC binding utilize the Databinding Framework to provide support for the following data transformations :
There are two samples showing using <binding.jsonrpc>, one which uses the Dojo Toolkit on the client, and another which uses the Tuscany scaDomain.js script. The samples are helloworld-dojo and helloworld-jsonrpc.