![]() There is no need to shell out money in order to use this software. The biggest advantage of apache tomcat is that it’s open-source.destroy(): The destroy method is invoked by tomcat at the end for all clean up related activities, such as the closing of database connections, freeing up resources for garbage collection, etc. This method makes calls to other resources on the server-side required for fetching data from the database and providing a response back to tomcat.ģ. The service method is responsible for generating the response for the incoming request passed on to it by tomcat. service(): Once an instance of the servlet is created, then tomcat calls the service method of the servlet. A servlet is initialized only once either when the server is being started or on being invoked by the client using the respective URL.Ģ. ![]() init(): This method is used to initialize the servlet. What happens in a Servlets life-cycle?Ī servlet life cycle consists of three main methods:ġ. Tomcat then returns the response back to the client by rendering the JSP. Load the respective servlet classes using the servlet mappings (from web.xml file) to handle incoming client requests.įrom the point the servlet class is loaded to the point it’s unloaded, the servlet is responsible for handling the client request by carrying out its various life cycle methods and providing the necessary response back to tomcat as JSP pages.Listen to all incoming requests from clients.It provides an environment in which one could run their java code. From a high-level perspective, apache tomcat is responsible to provide a run-time environment for the servlets. Tomcat is widely used by web developers when working on web application development. Monitoring the server for incoming client requests is not the job of a servlet but that of a web server. Servlet is one such API provided by the Java Platform Enterprise Edition designed to work along with web servers. To be able to interface one’s application with the webserver, predefined API’s (Application Programming Interfaces) are provided. In order to facilitate our web pages with dynamic capabilities, a web server is required. Hence a client cannot interact with a static web page. Web pages by itself are static HTML files. Since tomcat operates only on the HTTP protocol, it falls under the webserver. Application servers are mostly used to handle large enterprise edition applications. Web servers can operate only over HTTP protocol, whereas application servers can operate over various CGI protocols, including HTTP protocol.It also contains attributes such as load balancing, data persistence, and messaging, to name a few. ![]()
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