The reason the web works is because you don't have to take a binary dependency each website. Probable the same reason that Flash and Silverlight are discouraged. Is using an custom SDK to consume a REST web service synonymous with using a plug in to view content?
Using an SDK to consume a REST web service is not synonymous with using a plugin to view content. It's more akin to using a browser engine written by someone else, rather than writing your own.
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In my iphone application I am calling (by SOAP post method) a web service which is written in .net and hosted on a server, and its all working fine. But my doubt is, can we write a web service in objective c? And host it on a server? so that we should be able to access it from any of the platforms like .net, php and objectiveC.
I read a fantastic tutorial regarding this question some time ago here.
To be honest, it can be quite difficult to really use this in a productive environment. If you want to get all the features and tools Apple gives to you (what seems to be the intention of your question), you'll have to use a Mac in order to run your service afterwards.
In my opionion using PHP for example (if you need a db also backed up by MySQL) is much easier. Almost all hosters support it and you won't have to worry about setting up a bunch of macs and connecting them via solid and stable cables to the internet (and with that: guarantee availability).
Yes. A web service is just some application that can provide a service over the web. As you can create an application in Objective C, it can be a web service the same as made in any other language.
You can make it run on any server where you have an objective C compiler, however, the framework you use may restrict your choices to the server (ie, you can write objective C on windows, but you wouldn't be able to use the NS framework)
Web services are not limited to a programming language, however you do need to find if there is any framework using objective-c can run on specific server. For example, iiS allows you to use Asp.net which could be implemented using C# or VB.Net.
From the clients who will consume web services, they don't have to be a specific type of device. I think that's the point of web services. The messages travel in between is formatted. For example, a SOAP message is using xml, and that would ensure the message travel on HTTP. Therefore no matter you use iPhone or Android or Blackberry, you should have no problem to make web service calls.
So in general, I think you have to see what kind of web services you want to create, and then see if Apple(I assume) can provide you with a good framework to do it. In terms of client side, as long as your web services are using XML or JSON, it should be well supported.
Hope it helps.
I have read through the chromiumembedded usage and looked at the cefclient application. Now i would like to provide my gwt application as an standalone application to my customers. Is it possible to package the gwt client code using chromiummebedded.
I am not sure how to make the RPC/RC calls to the server if its packaged in CEF.
I think you need to include an embedded webserver in your application, and serve the generated GWT application files from this.
Since the url for your server will be different, you could disable the same origin policy in ChromiumEmbedded to use normal RPC calls, but it might be better to use cross domain calls as describe in Googles tutorial
I'm looking to develop a blackberry application to consume a RESTful service. At the moment we plan to develop a REST layer which we will use to perform searches on a back end database and return the results as JSON.
I have used the Jersey framework ( http://jersey.java.net/ ) for consuming (and developing) REST layers in the past.
This is the first time we plan to develop such an app for a blackberry. From looking around I'm not sure if jersey is supported on the blackberry for consuming RESTful services.
So I'm wondering could someone offer some advice (on jersey or any other purpose built JARs) for using RESTful services on Blackberry? Otherwise we will have to build from scratch the code for consuming the RESTFul service. Or even use SOAP which I prefer not to have to do if possible.
Thanks,
John
Take a look at the JSON.org website, they have lib in Java to parse JSON data(I'v manage to make it work for BlackBerry without to much modifications.
The only thing left to do is a connection to the web service by passing the parameter you need to it. And then parse the response with the JSON lib to rebuild your data model in your native client.
And please don't use SOAP for mobile application.
Please read RIM doc for socket
You can use a httpConnection too
I am developing an application in GWT which needs to call a native C++ code in Directshow to do some multimedia processing.I am guessing that I cant use JNI because GWT converts code to javascript.I did have a look at similar posts on the forum(and on GWT site about JSNI) but cant find a example that specifically talks about calling C++ code from GWT(its mostly about calling Java code from Javascript).Can anyone throw some light on this or direct me to a tutorial?
Where exactly is this code supposed run? Surely not on the client-side. Client-side native code is nowhere near mass adoption.
GWT can either interface with JSNI in order to write native JS code inside your GWT Java code, or to interface with Java back-ends, whilst the framework handles the RPC. Even without GWT you have no way to run native code from within the browser (at least in the near future).
Bottom line - if you can't do it in plain vanilla Javascript on the client side, you can't do it in GWT.
What you can do is use this native code in the back-end, and call it via classic JNI from your Java back-end classes (and then what difference does it make if it's part of a GWT project or not?), but it sounds like this is not the case.
First of all, have a clear separation of Client (HTML / Javascript running in the browser) and server components (java service servlets).
If I understood your problem statement right, You need the UI to collect parameters for your transcoders and your transcoders need to run on a Windows box.
You can look up any simple GWT application to figure out how to serve a GWT application in any container (perhaps jetty for the time being) and process basic HTML form inputs. Once you have all the parameters on the server, you need to figure out how to delegate these parameters posted from the browser (your GWT application) from the service servlet (running within a web server) to your DirectShow application. This point onwards its a java application talking to a native process problem.
You can use various ways to communicate parameters to your native directshow application. Simplest solution is to initiate the application with the exec method passing command parameters inline. Otherwise you can communicate to a running native application via TCP sockets or integrate the native app using JNI. It all depends on your architectural design, which approach you wish to take.
I'm thinking about creating an application for the iPhone and Android that will need to access a common backend to retrieve account information. Can both access a web service over https? What other way would allow me to have one interface to the backend that is accessible by both?
They both work over http and https which is a common enough protocol. I would suggest you go with a RESTful web service so you expose your service via URI's like http://www.myservice.com/weather/zip/98007 which would return an XML blob that can be parsed by the client.
if you are starting from nothing, i'd definitely go with RESTful service that returns/accepts JSON... there are plenty of libraries for both platforms that will accept JSON and turn it into arrays and dictionaries.
I'd recommend using a RESTful web service backend, which is all standard HTTP and/or HTTPS. If you can use Ruby on Rails, its default scaffolding will get you about 99% of the way there and for the iPhone there is an open source project called ObjectiveResource that will automate your communication with this Rails backend. I haven't investigated yet what options are available on Android but since it is all simple HTTP it should be straightforward. I am not the maintainer of ObjectiveResource but I have contributed some code. You can check it out here:
http://iphoneonrails.com
One good approach I have seen used with other services is to write the backend in such a way that it can feed data back in different types - for Android an XML response is best, but for the iPhone sending back plist data is preferred (though it can also work with XML if required). In both cases it's easier to simply POST updates back to the server than to wrap an update in XML.
Both platforms should be able to use whatever form of authentication you wish to use, the iPhone I know supports all methods of HTTP authentication.