Durian: web.xml

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GitHub: https://github.com/SylkeWay/synthful

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First, look at the web app definition file:

/durian/src/main/webapp/WEB-INF/web.xml .

web-app enclosure

<web-app
  xmlns="http://java.sun.com/xml/ns/javaee" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
    http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 
  version="3.1">

• As stated previously, this project uses servlet 3.1 .
• Note that servlet 2.5 onwards, any occurrences of  {j2ee} in all its namespaces have been replaced with {javaee}.

Spring context bootstrap

web.xml provides the facility to specify bootstrap classes. Spring's ContextLoaderListener class is needed to be bootstrapped to perform its component based actions.

<listener>
  <listener-class>
    org.springframework.web.context.ContextLoaderListener
  <</listener-class>
</listener>

Custom location of Spring configuration files

The location of all the text and data files are consolidated under the source folder

[src/main/resources]

Spring, not including webmvc, configuration files are placed under

[src/main/resources]/spring

Therefore, Spring should be notified through the {contextConfigLocation} parameter that such configuration files should be found in the classpath

/spring/ .

<context-param>
  <param-name>contextConfigLocation<</param-name>
  <param-value>classpath:/spring/**-context.xml</param-value>
</context-param>

Spring is instructed to look under the folder /spring/ and its subfolders for files with names constrained by the pattern **-context.xml,

i.e. whose names end with  -context.xml .

The parameter value must define a namespace that is accessible by the web app during run-time. Which could either be

• classpath:{a classpath commalist}
• a plain folder path rooted from the web app context root, e.g.,
  WEB-INF/

Spring mvc bootstrap

Since Spring webmvc operates on the servlet frontend (i.e. frontend of the server side, not the client frontend), its component-action bootstrap is a servlet: org.springframework.web.servlet.DispatcherServlet .

<servlet>
  <servlet-name>mvc-dispatcher
  <servlet-class>
    org.springframework.web.servlet.DispatcherServlet
  </servlet-class>
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:/springweb/**-context.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
</servlet>

Similarly, the webmvc bootstrap servlet would look for components through a context configuration file, and therefore too has its own  {contextConfigLocation} parameter, to instruct Spring webmvc to look for all its context configuration files under the classpath

/springweb/

.