Java Spring FrameWork

Notes

Rest Architecture

REST (REpresentational State Transfer) New naming : HATEOAS (Hypermedia as the Engine of Application State)

1. Client-serveur: Data remain on serveur and client is a separated entity
2. No state: Each request provide to the server all the necessary information to provide the service
3. Cache: The information sent by the server must contain, creation date, expiration date.
4. Uniform Interface:
   1. Each resources has a unic Id;
   2. Resources have representation defined;
   3. Auto descriptive message: The content and how to read the message; (Like how the message is coded Utf8).
   4. Hypermedia Each access to the next step of the application is describe in the current message.
5. Hyercharchie
6. Code-on-Demande(facultative): Script excecution on the client retreived from the server.

| Stackoverflow what exactly is restful programming

Maven Setup

<!-- General repository to get package -->  
<repositories>
    <repository>
        <id>io.spring.repo.maven.release</id>
        <url>http://repo.spring.io/release/</url>
        <snapshots><enabled>false</enabled></snapshots>
    </repository>
</repositories>

<!-- Maven bom to manage dependencies between jar -->  
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-framework-bom</artifactId>
            <version>4.1.2.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<!-- Dependencies without version because they are managed by Maven Bom --> 
<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
    </dependency>
</dependencies>

web.xml Setup

1 In the web.xml specify the location of the Spring Configuration File

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         id="WebApp_ID" version="2.5">

<!-- Application Name -->
    <display-name>Spring ExoTest</display-name>
    <description>Spring ExoTest Demo</description>

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


2 A listner 
<syntaxhighlight lang="xml">
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>