Wednesday Dec 19, 2012

Updating an ADF Web Service Data Control When Service Structure or Location Change

The web service data control in Oracle ADF gives you a simplified approach to consuming services in ADF applications, and now with ADF Mobile the usage of this service seems to be growing.

A frequent question we get is what happens if the service that I'm consuming changes - how do I update my data control?

Well, first we should mention that if you do a good design of your application before you actually code - then things like Web service method signature shouldn't change. The signature is the contract between the publisher and the consumer, and contracts shouldn't be broken.

But in reality things do change during development stages, so here is how you can update both method signatures and service location with the Web service data control:

After watching this video you might be tempted to not copy the WSDLs to your project - which lets you use the right click update on a data control. However there is a reason why the copy is on by default, it reduces network traffic when you are actually running your application since ADF doesn't need to go to the server to find out the service structure. So for runtime performance, you probably should keep the WSDL local.

 I encourage you to further look into both the connections.xml file where your service location is saved, and the datacontrols.dcx file where its definition is kept to get an even deeper understanding of how ADF works underneath the declarative layers.


Thursday Dec 13, 2012

Accessing Secure Web Services from ADF Mobile

Most of the enterprise Web services you'll access are going to be secured - meaning they'll require you to pass a user/password in order to get to their data. 

If you never created a secured Web service, it's simple in JDeveloper! For the below video I just right clicked on a Java class that I exposed as a Web service, and chose  "Web Service Properties" and then checked the "oracle/wss_username_token_service_policy" box from the list of options (that's the option supported by ADF Mobile right now):


In the demo below we are going to use a "remote" login server that does the authentication of the user/pass.

The easiest way to "create" a remote login server is to create a "regular" web ADF application, secure it, and deploy it on a server. The secured ADF application can just require ADF Authentication with a simple HTTP Basic Authentication - basically the next two images in the Application->Secure->Configure ADF Security menu wizard.


ok - so now you have a secured ADF application - deploy it on a server and get the URL for that application. 

From this point on you'll see the process in the video which deals with the configuration of your ADF Mobile app.

First you'll need to enable security for your ADF mobile application, so it will prompt users to provide a user/pass combination.

You'll also need to configure security on specific features. And you can have them use remote login pointing to your regular secured ADF application.

Next define your Web service data control. Right click on the web service data control to "define Web Service Security".

You'll also need to define the adfCredentialStoreKey property for the Web Service data control in the connections.xml file.

This should be it. Here is the flow:

If you haven't already - you can read more about this in the Mobile developer guide, and Andrejus has a sample for you.

Calling Web Service with Complex Parameters in ADF Mobile

Many of the SOAP based web services out there have parameters of specific object types - so not just simple String/int inputs. The ADF Web service data control makes it quite simple to interact with them. And this applies also in the case of ADF Mobile.

Since there were several thread on OTN asking about this - I thought I'll do a quick demo to refresh people memory about how you pass these "complex" parameters to your Web service methods. By the way - this video is also relevant if you are not doing mobile development, you'll basically use the exact same process for building "regular web" ADF applications that access these types of Web services.

One more thing you might want to do after you create the page is look at the binding tab to see the method call in there, and notice the parameters for it in the structure property. Go and look at their NDValue property to get the complete picture.

Friday Oct 01, 2010

Using ADF with PeopleSoft - Web and Mobile Clients

One of the areas that got a bit more attention this year at Oracle OpenWorld is the usage of Oracle ADF to build new interfaces to existing applications and for Oracle Apps Unlimited specifically.
The basic idea is that you can access data and functionality from your existing applications and develop either rich web user interfaces or interfaces for mobile devices using JDeveloper and Oracle ADF.

Here is a little demo that I did in one of my sessions showing how this works when accessing a Web service exposed by Peoplesoft.

By the way - if you want a more native looking iOS application you can use the skining capabilities - see the way it is done in this demo with EBS.

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I'm a Director of Product Management for the Oracle Java Development Tools.
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