问题
I wanted to make a web application through which :
user(end user) can create his own web application online.
which will be integrated with the databases and application/web servers
- and user can also publish that application withing that application only...
Doing some research i come to know it goes under category of PaaS(Platform as a Service)
But i am confuse how can i do that ? I want to build that application using Java/J2EE.
Can any one explain me from where should i start ? Or which framework / technology is better to implement it in Java ?
Waiting for your helpful reply....
回答1:
There are several options as far as choosing a PaaS - each PaaS vendor has its pros and cons, so you need to consider a range of issues:
- Language support - Do you want just Java or maybe additional languages/frameworks?
- Hosting - Are you going to use a cloud computing provider like Amazon Web Services? Or are you using your own hardware? Or do you want multiple options?
- DB support - You mentioned using a central DB. Do you plan on installing/administering this DB yourself, or use a hosted DB service? Do you need the PaaS to support the particular DB you want? Perhaps you need multiple Databases to provide scalability and separation among clients?
There are several good comparisons of PaaS vendors out there. This might be a good place to start: Looking for PaaS providers recommendations
Full disclosure: I work for Cloudify, an Open-Source PaaS provider.
回答2:
I think while choosing a PaaS you should think of the below points.
- It should be easy to deploy, scale and manage
- Scaling
- Flexible topology
- Data safety
- No vendor lock in
- Open software stack
I suggest you, before going to any big vendor try a new player in town Jelastic. I recently used their services and continue to do so and they are just awesome. Their web UI is best in class and has no drama of API, SDK or downloadable software. Let me know if you use them so that I can also have some feedback before I migrate all our apps to them.
Surya
回答3:
As far as i understand, you are looking for a solution that Viravis is currenlty implemented.
But believe me it is not an easy task to build that kind of platform. i strongly suggest you to look at some PaaS providers to get involved and build a business relationship to achieve your goal. They are just exists for this purpose. Provide platform for people who just want to develop a single online application or some professional who want to build an SaaS business.
I think it is better to hire the platform rather than build it from scratch (ofcourse if you dont have to...)
回答4:
A web application consists of language, framework, database and Web-server.
If you want to make a web application in java, you should try GRAILS framework. Its fast and web development is very easy and you can use java code as it is, in it.
Secondly you can choose database from MySQL, PostgreSQL etc or if you want to use No-SQL dbs, you can choose from MOngoDB, CouchDB etc.
Web-Servers can be tomcat, jetty etc.
After creating you application, you would like to host your application on web, Here PaaS comes to play. It helps you to deploy and host your application on web. So what you have to do is only to focus on your application and then deploy your app on any PaaS providers.
There are many PaaS providers in market, you can choose any.
来源：https://stackoverflow.com/questions/3458409/paas-how-to-build