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A Jakarta Servlet, formerly Java Servlet is a Java software component that extends the capabilities of a server. Although servlets can respond to many types of requests, they most commonly implement web containers for hosting web applications on web servers and thus qualify as a server-side servlet web API .
A web container (also known as a servlet container; [1] and compare "webcontainer" [2]) is the component of a web server that interacts with Jakarta Servlets.A web container is responsible for managing the lifecycle of servlets, mapping a URL to a particular servlet and ensuring that the URL requester has the correct access-rights.
JSPs are translated into servlets at runtime, therefore JSP is a Servlet; each JSP servlet is cached and re-used until the original JSP is modified. [ 3 ] Jakarta Server Pages can be used independently or as the view component of a server-side model–view–controller design, normally with JavaBeans as the model and Java servlets (or a ...
Apache Tomcat (called "Tomcat" for short) is a free and open-source implementation of the Jakarta Servlet, Jakarta Expression Language, and WebSocket technologies. It provides a "pure Java" HTTP web server environment in which Java code can also run. Thus it is a Java web application server, although not a full JEE application server.
Eclipse Jetty is a Java web server and Java Servlet container. While web servers are usually associated with serving documents to people, Jetty is now often used for machine to machine communications, usually within larger software frameworks.
The Servlet API is the foundation of almost all Java Web View technologies. Servlet provides the basic mechanism for writing Java classes for web applications. Servlets can respond to HTTP requests, create cookies and maintain sessions.
Apache Sling is an open source Web framework for the Java platform designed to create content-centric applications on top of a JSR-170-compliant (a.k.a. JCR) content repository such as Apache Jackrabbit. [2] Apache Sling allows developers to deploy their application components as OSGi bundles or as scripts and templates in the content repository.
For example, the design of a multitier architecture is made simple using Java Servlets in the web server and various CORBA servers containing the business logic and wrapping the database accesses. This allows the implementations of the business logic to change, while the interface changes would need to be handled as in any other technology.