In the Java EE, or J2EE or JEE world, in that place is a lot of confusion betwixt terminology, which is quite evident that straightaway nosotros accept 3 words (J2EE, Java EE, as well as JEE) to clit the same technology platform. You volition encounter Java developers using the damage similar Web Server, Application Server, as well as Web containers interchangeably but they are non precisely same. The original departure betwixt a Web server as well as an application server is that spider web server is meant to serve static pages e.g. HTML as well as CSS, spell Application Server is responsible for generating dynamic content past times executing server-side code e.g. JSP, Servlet or EJB. One of the most pop spider web servers is Apache HTTPD which is oft used inwards conjunction amongst Tomcat to host many Java spider web application. Now, tomcat is non precisely an application server, it's to a greater extent than of a servlet engine or spider web container or too known equally servlet containers because it provides the runtime environs for Servlet as well as JSP but doesn't render the services similar EJB as well as distributed transaction which are a key characteristic of the application server inwards Java JEE world.
1) Examples
In corporation to meliorate empathize the difference, you lot must know roughly pop examples of the spider web server, application server, as well as spider web containers. Apache as well as IIS are 2 pop spider web servers. Apache is used everywhere including Java basis but IIS is to a greater extent than pop inwards Microsoft ASP .NET world. From Java EE perspective span of pop application servers are IBM WebSphere, Oracle WebLogic, Glassfish as well as Redhat's JBoss. Coming dorsum to spider web containers or servlet engines, Apache Tomcat as well as Jetty are 2 of the most pop Servlet engine inwards Java spider web world.
2) Features as well as Responsibility
The meaning departure betwixt spider web server as well as application server comes from a responsibleness perspective. Web servers are responsible for serving static content e.g. HTML over HTTP protocol spell application server is responsible for serving dynamic content, managing EJB pool, facilitating distributed transaction, facilitating application lookup over JNDI, application safety as well as others. While spider web containers are alone responsible for generating HTML past times executing JSP as well as Servlet on Server side.
This is too 1 of the pop questions on Java JEE interviews, but for meliorate preparation, you lot tin too refer Java Programming Interview Exposed book, 1 of the best to produce for Java spider web evolution interviews.
3) Service
One to a greater extent than departure betwixt an application server as well as spider web server comes from the service perspective. It's expected from a Web server to render HTTP protocol degree service spell application server is supposed to render to a greater extent than powerful as well as dynamic Web service as well as concern degree service via EJB (Enterprise Java Beans). Essential services similar Database connector pooling is non alone provided past times application server but too past times Web containers similar Tomcat. You tin read to a greater extent than nearly how to setup connector puddle inwards tomcat here.
4) Usage
Once you lot know the departure betwixt spider web as well as application server as well as spider web containers, it's slow to figure out when to job them. You take away a spider web server similar Apache HTTPD if you lot are serving static spider web pages. If you lot accept a Java application amongst only JSP as well as Servlet to generate dynamic content thus you lot take away spider web containers similar Tomcat or Jetty. While, if you lot accept Java EE application using EJB, distributed transaction, messaging as well as other fancy features than you lot take away a total fledged application server similar JBoss, WebSphere or Oracle's WebLogic.
You tin too job spider web server as well as application server together inwards the same setup equally shown inwards the next example:
That's all nearly the difference betwixt Web Server, Application Server as well as Servlet Container in Java as well as JEE world. Remember, each 1 of the accept dissimilar live on as well as many times used together inwards Java Web world. For example, 1 of the pop setups is apache fronting Tomcat. You tin job this setup if your Web application is alone using JSP as well as Servlet as well as doesn't take away EJB or distributed transaction feature. More basic services similar Database connector pooling is too provided past times Tomcat. On the other hand, if you lot accept total fledged Java EE application including EJB thus you lot take away a proper application server similar WebSphere, WebLogic or JBoss to host your application.
Further Learning
Java Web Fundamentals By Kevin Jones
Java EE amongst Vaadin, Spring Boot as well as Maven
Spring Framework Master Class - Beginner to Expert
Web Server vs Application Server vs Web Containers
From the outset business office it is clear that Web server serves static content, but, both spider web containers as well as application servers dynamic content. Let's encounter a span of to a greater extent than points to empathize the departure betwixt Web as well as Application Server equally good Servlet engines similar Tomcat as well as Jetty.1) Examples
In corporation to meliorate empathize the difference, you lot must know roughly pop examples of the spider web server, application server, as well as spider web containers. Apache as well as IIS are 2 pop spider web servers. Apache is used everywhere including Java basis but IIS is to a greater extent than pop inwards Microsoft ASP .NET world. From Java EE perspective span of pop application servers are IBM WebSphere, Oracle WebLogic, Glassfish as well as Redhat's JBoss. Coming dorsum to spider web containers or servlet engines, Apache Tomcat as well as Jetty are 2 of the most pop Servlet engine inwards Java spider web world.
2) Features as well as Responsibility
The meaning departure betwixt spider web server as well as application server comes from a responsibleness perspective. Web servers are responsible for serving static content e.g. HTML over HTTP protocol spell application server is responsible for serving dynamic content, managing EJB pool, facilitating distributed transaction, facilitating application lookup over JNDI, application safety as well as others. While spider web containers are alone responsible for generating HTML past times executing JSP as well as Servlet on Server side.
This is too 1 of the pop questions on Java JEE interviews, but for meliorate preparation, you lot tin too refer Java Programming Interview Exposed book, 1 of the best to produce for Java spider web evolution interviews.
3) Service
One to a greater extent than departure betwixt an application server as well as spider web server comes from the service perspective. It's expected from a Web server to render HTTP protocol degree service spell application server is supposed to render to a greater extent than powerful as well as dynamic Web service as well as concern degree service via EJB (Enterprise Java Beans). Essential services similar Database connector pooling is non alone provided past times application server but too past times Web containers similar Tomcat. You tin read to a greater extent than nearly how to setup connector puddle inwards tomcat here.
4) Usage
Once you lot know the departure betwixt spider web as well as application server as well as spider web containers, it's slow to figure out when to job them. You take away a spider web server similar Apache HTTPD if you lot are serving static spider web pages. If you lot accept a Java application amongst only JSP as well as Servlet to generate dynamic content thus you lot take away spider web containers similar Tomcat or Jetty. While, if you lot accept Java EE application using EJB, distributed transaction, messaging as well as other fancy features than you lot take away a total fledged application server similar JBoss, WebSphere or Oracle's WebLogic.
You tin too job spider web server as well as application server together inwards the same setup equally shown inwards the next example:
That's all nearly the difference betwixt Web Server, Application Server as well as Servlet Container in Java as well as JEE world. Remember, each 1 of the accept dissimilar live on as well as many times used together inwards Java Web world. For example, 1 of the pop setups is apache fronting Tomcat. You tin job this setup if your Web application is alone using JSP as well as Servlet as well as doesn't take away EJB or distributed transaction feature. More basic services similar Database connector pooling is too provided past times Tomcat. On the other hand, if you lot accept total fledged Java EE application including EJB thus you lot take away a proper application server similar WebSphere, WebLogic or JBoss to host your application.
Further Learning
Java Web Fundamentals By Kevin Jones
Java EE amongst Vaadin, Spring Boot as well as Maven
Spring Framework Master Class - Beginner to Expert
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