Apache Jakarta Tomcat

(1)

Apache Jakarta

Tomcat

20041058

Suh

,

Junho

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

Tomcat How it works?

(2)

Tomcat Overview

What we need to make more dynamic web What we need to make more dynamic web

documents? documents?

Server that supports JSP, ASP, database etc Server that supports JSP, ASP, database etc……

We concentrates on SomethingWe concentrates on Something that support JSP.that support JSP.

Something is

Something is TomcatTomcat

Why it is popular??Why it is popular??

GNU license,

GNU license, it`sit`s free!free!

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

(3)

History

Before Tomcat

Competition of CGI

CGI(Perl

CGI(Perl, C), C) 1 processor/1 request1 processor/1 request Fast CGI

Fast CGI 1 processor/same request1 processor/same request ASP,PHP

ASP,PHP 1 thread/1 request script1 thread/1 request script Servlet

Servlet 1 thread/1 request compile1 thread/1 request compile JSP

JSP 1 thread/1 request 2 compile1 thread/1 request 2 compile

Born Tomcat

Servlet

Servlet 2.2api + 2.2api + jspjsp1.1api = Tomcat 3.11.1api = Tomcat 3.1 Servlet

Servlet apiapi 2.3 + JSP api2.3 + JSP api 1.2 = Tomcat 4.01.2 = Tomcat 4.0 Servlet

Servlet apiapi 2.4 + JSP api2.4 + JSP api 2.0 = Tomcat 5.0(latest)2.0 = Tomcat 5.0(latest)

Tomcat 3.1

including servletincluding servlet reloadingreloading

WAR file support and added connectors for the IIS WAR file support and added connectors for the IIS

and Netscape web servers and Netscape web servers

(4)

Tomcat 4.0

Implements a new servletImplements a new servletcontainer (called Catalina) that is container (called Catalina) that is based on completely new architecture

based on completely new architecture

JMX based administration features JMX based administration features

JSP and Struts based administration web application JSP and Struts based administration web application

New Coyote connector (HTTP/1.1, AJP 1.3 and JNI support) New Coyote connector (HTTP/1.1, AJP 1.3 and JNI support)

Rewritten Jasper JSP page compiler Rewritten Jasper JSP page compiler

Performance and memory efficiency improvements Performance and memory efficiency improvements

Enhanced manager application support for integration with Enhanced manager application support for integration with development tools

development tools

Custom Ant tasks to interact with the manager application Custom Ant tasks to interact with the manager application directly from

directly from build.xmlbuild.xmlscriptsscripts

Tomcat 5.0

resulting in improved performance, stability, and total cost of resulting in improved performance, stability, and total cost of ownership

ownership

Performance optimizations and reduced garbage collection Performance optimizations and reduced garbage collection

RefactoredRefactoredapplication deployerapplication deployer, with an optional standalone , with an optional standalone deployerdeployer allowing validation and compilation of a web application before allowing validation and compilation of a web application before putting putting it in production

it in production

Complete server monitoring using JMX and the manager web Complete server monitoring using JMX and the manager web application

application

Scalability and reliability enhancements Scalability and reliability enhancements

Improved TaglibsImproved Taglibshandling, including advanced pooling and tag handling, including advanced pooling and tag plugins

plugins

Improved platform integration, with native Windows and Unix Improved platform integration, with native Windows and Unix wrappers

wrappers

Embedding using JMX Embedding using JMX

Enhanced Security Manager support Enhanced Security Manager support

Integrated session clustering Integrated session clustering

(5)

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

Tomcat How it works?

What is Tomcat?

Tomcat

Java-based web server + servlet container w/ JSP Most popular!!

Tomcat Current Version

4.1.27(stable) 5.0.12(beta)

Tomcat Component

Mysql, java, Tomcat4, ant, apache, tomcat connector&apr, mod_jk, jdbc

(6)

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

Tomcat How it works?

Servlet

Container

Servlet

containers can be partitioned as:

Standalone: Integral part of web server (as when using Standalone: Integral part of web server (as when using a Java

a Java--based web server)based web server)

Add-Add-on component to web server: Java container on component to web server: Java container implementation + web server

implementation + web server pluginplugin

ServletServletcode runs inside Java containercode runs inside Java container

Java container runs inside of JVMJava container runs inside of JVM

(7)

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

Tomcat How it works?

Web Server Component

Web

Server(Apache

)

HTTP requests by returning

HTTP requests by returning ‘‘webweb’’resources (e.g., resources (e.g., HTML files, images,

HTML files, images, applets,CGIapplets,CGI output, output, ……) over the ) over the

Internet Internet

Servlet

Container(Tomcat

)

runtime shell that invokes

runtime shell that invokes servletsservlets on behalf of clientson behalf of clients software that runs

software that runs servletsservlets and manages them and manages them through their lifecycle

(8)

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

Tomcat How it works?

Tomcat Execution Mode

Stand

-

alone mode

●

●_{Not as fast as Apache for static pages}Not as fast as Apache for static pages

●

●_{Not as configurable as Apache}Not as configurable as Apache

●

●_{Not as robust as Apache}Not as robust as Apache

●

●_{May not support functionality found only in Apache}May not support functionality found only in Apache modules (e.g.,

modules (e.g., PerlPerl, PHP, security), PHP, security)

●

(9)

Tomcat Execution Mode

In

-

process add

-

on

mode

Suitable for multi

Suitable for multi--threaded single process serversthreaded single process servers Provides good performance

Provides good performance Limited in scalability

Limited in scalability

Out

-

of

-

process add

-

on mode

Poorer response time than for in

Poorer response time than for in--process process servletservlet container

container

Better scalability Better scalability Better stability Better stability

Road Map

Tomcat Overview

History

_History

What is Tomcat?

_{What is Tomcat?}

Servlet

Container

Web Server Component

_{Web Server Component}

Tomcat Execution Mode

Tomcat How it works?

(10)

Tomcat how it works?

Tomcat interoperates with Apache Tomcat interoperates with Apache Apache in standalone mode

Tomcat in out-of-process add-on mode

Client

http://server/path/to/resource

Tomcat

AJPV12/13 TCP/8007

2

resource

5

3

4

Apache

adapter

1

Reference

http://http://jakarta.apache.org/tomcat/

http://www.debianusers.org/

(11)