have anyone come across a complete GWT app with registration/sign-up page to start with--unlike with PHP. Until now I haven't find such app that have the ability to register user, have the user a 'user page' and so on. With integration to MySQL and other db to persist user data. Does anyone know such code to start with.
A GWT app is quite useless without an appropriate backend (Java, PHP, Python, etc).
In the end GWT code is only compiled to client-side javascript code. With client-side javascript you can't access any database on the server and thus any GWT app also requires a backend in order to access a database like MySQL.
So in order to create a registration/sign-up app you have to write both backend and frontend code.
For the frontend and the UI respectively you can use GWT. For the backend you can use any server side technology. The tightest integration with GWT can be achieved with a Java backend but you can also use non-java backends like PHP, Ruby, Python, etc.
GWT will communicate either via RPC/RequestFactory (Java) or RequestBuilder (non-java backends). Fore more information refer to the GWT docs.
So I recommend following steps:
Decide which backend technology you are going to use. Java offers the tightest integration (RPC,RequestFactory, etc). However for small/simple apps sometimes it is easier to use non-java backends like Python or PHP because they can be setup/implemented faster/easier.
Implement the business logic on the server-side. In your case this includes among others "adding new users to the database", "signing up users", "retrieving user information", etc
Design and implement the UI with GWT. In your case this will be the user-page and the form to fill in details for signing up, etc.
Write the communication part between frontend and backend in GWT using RequestFactory/RPC (Java) or RequestBuilder (non-Java)
What kind of application are you going to develop? If your project is a public website and you plan to run it on GAE, you could use Google App Engine User Service.
http://code.google.com/appengine/docs/java/users/
For enterprise apps this is probably not a valid option...
Related
I have developed one spring based java web application. In my project it is requirement to use alfresco as a CMS. For this I want to integrate this application with alfresco. So I decided to use alfresco java API's.
http://dev.alfresco.com/resource/docs/java/
But I am not getting how to use those API's to complete backend work of my web application. Suppose I would like to submit one form having user name & password fields in it. After click on submit button how can I handle request in backend so it will use Alfresco java API to process request and store details in database.
I have to do many operations in my project like upload file, play with documents, Submit different forms. view those forms etc.
My first question is am I going in right direction by using alfresco java API's. if yes then how can use those API? is there any other way to do this?
Any help would be appreciate!!!
Thanks in Advance,
Kailas Salunke.
Well, based on my experience, Alfresco is an excellent ECM but not suitable for being a CMS.
Apart from that, it is difficult to give suggestions, starting from the very general overview you have given, but things like user name and password have little to do with an ECM and storing of data in a database.
You have two options available.
One involve using the Web Content Management Quick Start, it's a Spring Surf app you can (not easily in my opinion) customize for your needs.
The other solutions, if you have an existing web app, rather than develop your own API have a look at CMIS, I have put a simple wikipedia explanation, you can dig further from there.
Then, when you are ready, have a look at Alfresco CMIS first, and the most used Java API for doing CMIS call, which is Apache Chemistry
CMIS, in its intent, guarantee that Alfresco could be replaced with any other CMIS compliant ECM. You can easily integrate Apache Chemistry in your Spring app.
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
Is Google Web Toolkit is fine to develop database based web application or do you have any other suggestion?
Thanks to answerers!
For a heavy Database based web application, nothing beats Grails. Check out this tutorial by IBM. It will show you the power of Grails and how easy it is to develop database based web applications in minutes. I love GWT and smartGwt, but will go for them over pure grails only if there is a lot of non-database based front end (client side) logic.
If you do not have a programming language of choice (Grails is groovy based, which is based on Java), you could even look at Ruby on Rails which was the inspiration for Grails itself.
Alternately, you can add both grails and gwt in the mix by using this gwt grails plugin so that you have a powerful database integration, as well as a powerful front end developer. (I haven't used this though)
Sure, but you will need to create your own RPC service to get records from server to client and to deliver modified records back the server. But it isn't difficult at all.
Alternatively you could also use SmartGWT, which is an extension for GWT with more widgets, etc. They have data bound objects but in free version would would need to create your own data sources. If you decide to buy a license they seem to have database integration out of the box.
And additional note to consider with SmartGWT is that it has relatively big download size - about 3MB uncompressed and almost 1MB compressed (HTTP server should compresse it; it is in HTTP standard and it is transparent). So if it is going to be a service in public internet it might get quite long to load (often exceeding magic 8 seconds).
I had been working on GWT (Google Web Toolkit) for 1.5 years and learned that its a perfect platform for developing web application which uses backend database for its operation unless you have the right skill sets working on your project and a basic design which is developed according to the requirement of your project.
I want to develop a Web Application by combining Spring Framework, GWT, Servlets, JSP........
I plan to develop Server side using Spring,Servlet ,JSP....
And for Client side, GWT....
The Output page(Response page) of my Application, will given by JSP only....
Then what is the use of GWT at client side....
please clear my doubt....
Read the following
1) AJAX - http://en.wikipedia.org/wiki/Ajax_(programming)
2) RIA - http://en.wikipedia.org/wiki/Rich_Internet_application
3) GWT - http://en.wikipedia.org/wiki/Google_Web_Toolkit
The problem with using purely jsp to create a web application is that each user interaction typically requires the entire page to be reloaded. Depending on what you're doing this approach is considered outdated. GWT is built on top of javascript and xhttp requests, allowing user interactions to affect only relevant portions of the page. This generally results in a faster and smoother user experience.
If you have already decided that you want to use JSP, then you don't need GWT. Although you could use it to create custom dynamic components and embed them on your page. Or to create a part of your application where you find JSP not sufficient (which would be probably a part that should be more 'dynamic' and would require a lot of javascript).
http://code.google.com/webtoolkit/overview.html#how
Looking for a recommendation of which framework/web server to go with on Linux. The idea is to build database backed RESTful web services.
I know Java, c++, c# (irrelevant I guess on linux) and C. Okay with developing in any of those.
Here is a table of frameworks that have varying degrees of support for REST and the languages they use.
You might want to check out RESTx. It is multi lingual: You can write code in Java, Python (server-side JavaScript coming soon). RESTx is specifically a platform for the creation of RESTful resources and web services. It is NOT a traditional application framework. DB backed web services are actually a specialty of RESTx: You identify the reusable components you want (in this case a JDBC capable DB access component), and then just configure it through the RESTful API or by filling out a small form in a browser. As a result, you get a new RESTful web service, which encapsulates the query you specified when creating the new resource.
I'm the lead developer on RESTx, so if you have any questions, please contact me or visit our forums.
If I were you I would go with Ruby 1.9.2 + Rails 3
they're fun and you get to learn something new
ubuntu specific install guide: http://web2linux.com/installing-rails-3-on-ubuntu-10-04-lucid-lynx/
official RoR intro: http://edgeguides.rubyonrails.org/getting_started.html