What Is Apache Tomcat- Apache Tomcat, informally referred to as Tomcat Server, is an open-source Java Servlet Container which has been developed by the Apache Software Foundation (ASF). Tomcat JSP has been designed which implements many Java EE specifications makes the implementation of JavaServlet, Java Server Pages (JSP), Java EL. It is used to provide and HTTP web server environment where Java code or Java based applications can run.
Tomcat's JSP engine is called Jasper. The current version of the server is Jasper 2.0.
JSP which is a technology used to developed Java based web applications has been developed and released by Sun Microsystems in 1999. It is like other scripting languages such as PHP, Perl, Python etc. however it makes use of Java programming language.
Apache Tomcat has several major components which makes a full fledged Web server. Below are listed the major components:
- Catalina: Catalina is Tomcat's servlet container which implements Sun Microsystems's specifications for servlet and JavaServer Pages (JSP). Coyote, the web server
- Coyote: Coyote is a Connector component which supports HTTP 1.1 protocol as a web server. It enables Catalina to act as a plain web server which can serve local files as HTTP documents.
Coyote performs the action of receiving requests from the client through a TCP port and also send back the response to the end user. There is another Coyote connection as well which also performs the same action of receiving/sending requests however not to the client but another web server which can be Apache. This results in a better performance.
- Jasper, the JSP engine: Jasper is Tomcat's JSP Engine. The prime function of Jasper is to parse JSP files which can be compiled to Java Code as servlet which is further handled by Catalina. When running a server Jasper senses modifications to JSP files and compiles them again.
The latest version of the Tomcat 5 uses Jasper which has some important features added:
. JSP Tag library pooling
. Background JSP
. Recompile JSP when included page changes
. JDT java compiler
- Clustering, for load balancing across multiple servers
- High availability, scheduling upgrades without disrupting the running system
Why Use Apache Tomcat?
Tomcat is web server which is primarily used to serve web applications based on Java. Tomcat provides management and configuration tools for developers and it uses its JSP engine (Jasper) to create a pure Java environment where the Java code is able to run.
Tomcat and JSP enables developers to generate dynamic Web content without the need to installing and use a full applet on server. Which is turn saves both time and money. Apart from that Tomcat is managed and maintained by Apache Software Foundation so it is an open source software so it is free to use under the Apache License 2.0.
Tomcat Server Requirements
In order to run Tomcat Sever you will need to have below specification as an essential for setting up the Tomcat we server
Java Version:Tomcat 7.x requires Java version 1.6 (or later) to run properly
Apache Tomcat Hosting
You will be looking for Tomcat hosting only if you have web applications specially meant to be developed in JSP so the market is quite niche as there are not many web applications which are based on Java due to limited usage. Tomcat has been designed to cater to JSP application hosting and to provide a wen hosting environment. So you will need to find a hosting provider which provide support for Tomcat. Due to its niche market it is very rare to find many web hosting companies offering plans based on Tomcat as it makes less commercial sense for them due to the reason mentioned above.
Having said that you will need to look at below things while choosing Tomcat Hosting Provider:
Tomcat and cPanel: make sure that cPanel is supported to manager server and it is integrated within the hosting environment. Using cPanel, you should be able to deploy JSP and servlet using cPanel.
Usually, cPanel comes integrated with most of the web hosting provider however it is better to double check with the provider before you purchase hosting plans.
It comes available with shared hosting plans however it may be the case that you need to pay some extra amount in order to be able to us cPanel on VPS as well as dedicated plans, specially if you are not comfortable working on command line interface so you will need to use cPanel in order to manage your hosting.
Pros and cons of Tomcat
- Tomcat is extremely light-weight.
- Tomcat is open source and therefore free to use
- It is only meant to be used for Java based applications
- There are limited options available from hosting providers due to its limited use. So you may end up paying more due to limited plans availability
Tomcat JSP Hosting Frequently Asked Questions
What is JSP?
JSP is a programming language based on Java and is short for JavaServer Pages. It is just like other programming languages such as PHP, Perl, Python etc. It is used to develop web applications where dynamic content is to be created.
What is a JavaServer Page?
A JavaServer Page, or JSP, is a technology which is used to develop dynamically generated content such as html, xml, or other text based files formats using the Java programming language.
How does a developer use JavaServer Pages?
JavaServer Pages files allow a developer to write static content (such as HTML) and then include dynamic content into the file.
It is quite similar to the other scripting languages such PHP, Ruby, Python etc. which are used to build dynamically served web pages.
What operating systems can JavaServer Pages be run on?
Since JSP is Java based technology so it can run on all operating system which support JVM (Java Virtual Machine).
What all is required run a JSP-based app?
As stated above JVM is required and apart from that a compatible web server with servlet container such as Apache Tomcat or Jetty are required to run JSP based web applications.
What is the benefit of using JavaServer Pages?
JSP is same as of other scripting languages such as PHP, Ruby, Perl, Python etc. which makes it to be used for generating web content dynamically. Since it is based on Java so it widely used to develop web based applications.