============
Webservers
============

=> Server is a software which is used to run web applications.

=> Users can access our web application by sending request to server.

=> Users will use client s/w to send request to server

		Ex: Browser (google chrome, Firefox, Edge)

=> Server is responsible to handle user requests & response.

=> We have several servers in the market to run our web applications.

			1) Tomcat
			2) JBoss
			3) Glassfish
			4) WebLogic
			5) WebSphere
			6) IIS etc..

Note: To run web application, server is mandatory.

=> The process of executing web application by using server is called as Deployment.

============================
What is Build & Deployment
============================

		Build = compile + test + package

		Deployment = Execution in server

==============
Tomcat Server
==============

=> Tomcat is free & open source s/w

=> Tomcat is a web server developed by Apache Organization.

=> Tomcat server developed using Java language

Note: To run tomcat server, java should be installed.

=> Tomcat server is used to run Java Web Applications.

=> Tomcat supports multiple operating systems.

=> Tomcat server runs on 8080 port number (we can change it).


=======================
Tomcat Setup In Linux
=======================

=> Create Linux VM using Amazon Linux AMI in AWS Cloud

=> Connect to Linux VM using ssh client

=> Install maven software

	ex: sudo yum install maven

Note: When we install maven, java s/w also gets installed automatically.

	mvn -version
	java -version

=> We can download tomcat software from its offical website

	URL : https://tomcat.apache.org/download-90.cgi	

=> Download tomcat server zip file

	Ex: wget https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.96/bin/apache-tomcat-9.0.96.zip

=> Extract zip file

	Ex: unzip <zip-file-name>

=> Go inside tomcat directory and see directory structure

	cd <tomcat-dir>

	ll	

===================================
Tomcat Server directory structure
===================================

1) bin : It contains files to start & stop server  (windows : bat , Linux : sh)

			windows: startup.bat & shutdown.bat
			Linux : statup.sh & shutdown.sh

2) conf : It contains tomcat server configuration files.

			ex: server.xml, tomcat-users.xml

3) webapps : It is called as deployment folder. We will keep war files here for execution.

4) lib :  It contains libraries required for server (jars).

5) temp : Temporary files will be created here (We can delete them).

6) logs : Server log messages will be stored here.

============================
Web app deployment process
============================

## Step-1 :: Create Maven web application in ec2-user home directory ##

mvn archetype:generate -DgroupId=in.ashokit -DartifactId=my-web-app -DarchetypeArtifactId=maven-archetype-webapp -DarchetypeVersion=1.4 -DinteractiveMode=false

cd <project-dir>

ls -l

## Step-2 :: Build project using maven goal ##

mvn clean package

ls -l

ls -l target

cd ..

## Step-3 :: Copy application war file into tomact-server webapps folder for execution ##

cp <app-war-file-path>  <tomcat-webapps-dir-path>

## Step-4 :: Start tomcat server from bin directory ##

cd apache-dir/bin

ls -l

chmod 777 catalina.sh
chmod 777 startup.sh

sh startup.sh

## Step-5 :: Enable Tomcat server port number 8080 in Ec2 VM Security Group Inbound Rules.

## Step-6 :: Access our web application using browser

		URL : http://public-ip:8080/my-web-app/