What is Servlet Container in Java?

Servlet Container

·   If client or user can request to server only for static web pages. But what if client wants dynamic web page at that time servlet container plays important role.

·   Servlet containers returns dynamic web pages based on user input.

·      The servlet container is the part of web server which can be run in a separate process. We can classify the servlet container states in three types:

o  Standalone: It is typical Java-based servers in which the servlet container and the web servers are the integral part of a single program. For example:- Tomcat

o  In-process state:- It is separated from the web server, because a different  program runs within the address space of the main server as a plug-in. Example:- Tomcat running inside the JBoss.

o   Out-of-process: The web server and servlet container are different programs which are run in a different process. For performing the communications between them, web server uses the plug-in provided by the servlet container.

·    Servlet container provide some features which are given below:

o  Security

o  Multithreaded support

o  Life Cycle Management

o  Object Pooling

o   Etc.