Tomcat Components

1. Connector

2. Container

3. Jasper

4. Naming

5. Session

6. Logging

7. JMS
   

Connector

1. recieve client request (listen on different ports per connector)

2. process request

Container Components

1. Engine (manage several sites)

2. Host (virtual host, manage one sits)

3. Context (manager one application)

4. Wrapper (servlet)

Process of Tomcat handling a client request

1. client send a request via connector listening port

2. connector sends request to specific container engine 

3. engine finds a host

4. host finds a context

5. context finds a servlet

6. servlet process and return a response to context

7. context return response to host

8. host return response to engine

9. engine return response to connector

Tomcat Configuration files

1. catalina.policy

2. catalina.properties

3. context.xml (web.xml)

4. logging.properties

5. server.xml (startup application)

6. tomcat-users.xml

7. web.xml
   

Tomcat Common Configuration

1. place war under webapp

2. add <context ... debug="0" docBase="..." path="" reloadable="true"/> in server.xml

3. place xml contains  <context ... debug="0" docBase="..." reloadable="true"/> under conf/Catelina/localhost

1. debug (error logger info level)

2. docBase (project path)

3. path (url matching path)

4. reloadable (true)

1. port: server.xml

2. memory: catalina.sh

3. hot reload

Tomcat JDBC connection pool

1. >=Tomcat 7.0: 3-rd party jdbc module (tomcat-jdbc)

2. add <Resource name="jdbc/user" auth="..." typr="..." factory=".." .../> in context.xml (define db connection pool properties)

3. add <resource-ref><res-ref-name>jdbc/user</res-ref-name>...</resource-ref> in web.xml

4. add db connector jar under lib folder
   

SSO

1. CAS 

2. virtual host (domain-based&port-based)
   

Security