Container for sip servlets?

Question

I am new to programming and working on SIP applications. I am bit confused about where to deploy SIP applications. I read about HTTP Servlets, which are deployed in servlet container, I believe Tomcat is one Servlet container.

Basically, I have few questions and understanding:

1. Container manages the lifecycle of the servlets and if I just get the servlets api jar and deploy it with my application it will not work?
2. I found SIP servlet API and there's also Mobicents SIP servlets. Are they different?
3. Can I deploy my SIP servlet application in Tomcat along with the API jar?
4. Is Mobicent a container for SIP servlets like Tomcat is for HTTP Servlets, but Mobicents also has Tomcat.

These are very naive questions but I tried to find out the answers myself and was not successful. I am not from programming background so having a difficulty to understand the things.

Thanks

Answer 1

1. I invite you to read the specification at https://jcp.org/en/jsr/detail?id=289 it's not a complex read and will give you a good idea of what you can do. SIP servlets are built off the generic servlet API provided by the Java Servlet Specification but differ from them in a number of ways notably on being asynchronous or being able to generate multiple responses to an incoming request

2. the SIP Servlets API is defined by the Java specification mentioned in 1. above. Mobicents SIP Servlets is an implementation of the SIP Servlets API specification. It is supported by TeleStax. This is very similar in concept to JBoss Application Server (aka Wildfly) implementing the Java EE Specifications and being supported by Red Hat.

3. Please download the latest version of Mobicents SIP Servlets on Tomcat. It comes with a couple SIP Servlets application by default. You can also check out the examples, that should give you a good sense of how things are working together.

4. the SIP Servlets specification mandates convergence of SIP and HTTP so that you can use both in your application and share data between HTTP Sessions and SIP Sessions to create converged applications leveraging both the Web and the VoIP worlds. As such Mobicents SIP Servlets extends Tomcat to provide SIP capabilities to it. So a vanilla Tomcat installation will not support SIP Servlets out of the box, you need to download the specific extended Mobicents SIP Servlets Tomcat Version to be able to use SIP Servlets.

There is no naive questions ;)