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I'm playing with writing a Java-capable webserver. How do you get from your WAR/JSP to executable Java code? I've figured at this point FCGI is not available(I do have a client impl). What kind of mechanisms or specs are here? Are there any standards?
Please refer the spec http://www.oracle.com/technetwork/java/javaee/tech/index-jsp-142185.html
To brief you about the invocation when a war is deployed in the web server,the server refers the web.xml files for important configuration and then finds out the information regarding your webapp.All the configuration is loaded.If you try to hit an url mapped to a servlet then the class corresponding to it gets loaded.
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Is it possible to write a java aplication which acts as an websocket server, without any Servlet Engines like jetty, tomcat....?
If yes, which Frameworks are out there?
I came accross jWebSocket, but can't find any examples or in the javadoc, how I can open a simple websocket
Using jWebSocket for sure you can open a web socket and there are lot of examples for the same.
1) https://jwebsocket.org/about-jws/Press-Articles/cross-platform/real-time-cross-platform-communication-websockets
2) https://technology.amis.nl/2012/01/14/implementing-a-java-server-side-component-for-jwebsocket-server-for-websocket-interaction-with-web-clients/
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I am new to webServices. I want to develop a webservice in Java. So far I came to know, WSDL is needed to kickstart with WebServices. So, How do I create a WSDL? Is there any tool which makes this easy?
Thanks in advance.
If you use JAX-WS (ships with Java 6, separate download for Java 5) and you expose a #WebMethod properly the WSDL can be automatically generated by the JAX-WS stack at runtime.
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I have three years's expeirence of java develping.
Now I am working with an system which is related to the ahthenciation. I am not good at this.
So I wonder if there is any opensoure project I can read and learn someting from which?
Spring Security is a good place to start.
I would recommend Apache Shiro
Check out Fortress, it is released under BSD open source license: http://iamfortress.org/
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Is there a Java equivalent for ASP.NET Membership?
Even though is not exactly equivalent, you can take a look at JAAS (every Java EE application server must support it). It will provide you user/role authentication and authorization.
There is no built-in frontend for managing user and roles though...
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I am looking for a framework to turn given Java class into WebService (may be with some limitations on method parameters etc)
Thanks
You can use axis2, or xfire. I'm sure there are other ways also, but these are the two that I've used.
The de-facto standard for this is Apache Axis: http://ws.apache.org/axis/ and http://ws.apache.org/axis2/