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Part 1 - Setup the basic project and tools

I am assuming that STS is successfully setup with the Maven and Subclipse plugins. I am running my STS On Ubuntu 10 platform. Some of you may have problems with Subclipse Native connector, just change that to use pure java SVNKit instead.I am sorry I am not going through the design architecture phase but straightway jumping into the project. This is intentional as my goal is see how easy or difficult it is to create a Spring 3 web application progressibly which is highly pluggable, easy to extend, customize and manage.

Launch STS and create a maven web project using (maven-archetype-webapp). The project was named ecrm.

Step 1 : Modify the pom file as shown below:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.effectivcrm</groupId>
    <artifactId>ecrm</artifactId>
    <packaging>war</packaging>
    <version>0.0.5</version>
    <name>ecrm</name>
    <url>http://maven.apache.org</url>

    <properties>

        <!-- ~~~~~~ -->
        <!-- System -->
        <!-- ~~~~~~ -->
        <jdk.version>1.6</jdk.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <!-- Version dependencies when used in multiple dependencies -->
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <spring.version>3.1.2.RELEASE</spring.version>
        <spring-security.version>3.1.2.RELEASE</spring-security.version>
        <spring-webflow.version>2.3.1.RELEASE</spring-webflow.version>
        <slf4j.version>1.5.10</slf4j.version>
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <!-- Variables substituted in resources file at build time -->
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <application.name>${project.name}</application.name>
        <application.version>${project.version}</application.version>
        <application.description>${project.description}</application.description>
    </properties>

    <developers>
        <developer>
            <name>Dhrubo</name>
            <email>info@effectivcrm.com</email>
            <organization></organization>
            <organizationUrl></organizationUrl>
        </developer>
    </developers>

    <!-- ~~~~~~~~~~~~ -->
    <!-- DEPENDENCIES -->
    <!-- ~~~~~~~~~~~~ -->
    <dependencies>
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <!-- List your specific dependencies below -->
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->

        <!-- ~~~~~~ -->
        <!-- LOGGER -->
        <!-- ~~~~~~ -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.15</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.jms</groupId>
                    <artifactId>jms</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.sun.jdmk</groupId>
                    <artifactId>jmxtools</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.sun.jmx</groupId>
                    <artifactId>jmxri</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <!-- ~~~~~~ -->
        <!-- SPRING -->
        <!-- ~~~~~~ -->

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
            <exclusions>
                <!-- Exclude Commons Logging in favor of SLF4j -->
                <exclusion>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.12</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.12</version>
        </dependency>

        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <!-- SPRING MVC -->
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>

        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
        <!-- THEMEYLEAF -->
        <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf</artifactId>
            <version>2.0.12</version>
        </dependency>

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring3</artifactId>
            <version>2.0.12</version>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>com.effectivcrm</groupId>
            <artifactId>view</artifactId>
            <version>0.0.1</version>

        </dependency>

    </dependencies>
    <!-- ~~~~~~~~~~~~ -->
    <!-- REPOSITORIES -->
    <!-- ~~~~~~~~~~~~ -->
    <repositories>

        <repository>
            <id>repository.entral.org</id>
            <url>http://repo1.maven.org/maven2</url>
            <layout>default</layout>
        </repository>

        <repository>
            <id>springsource-repo</id>
            <name>SpringSource Repository</name>
            <url>http://repo.springsource.org/release</url>
        </repository>

        <repository>
            <id>jboss-public-repository-group</id>
            <url>https://repository.jboss.org/nexus/content/groups/public-jboss/</url>
        </repository>

        <repository>
            <id>java.net-maven</id>
            <name>java.net-maven</name>
            <url>http://download.java.net/maven/2</url>
        </repository>

    </repositories>

    <build>
        <finalName>ecrm</finalName>
    </build>

</project>

Step 2: Modify the web.xml to support Servlet 3.0 on Tomcat 7.x

<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <!-- Log4j -->
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>file:${catalina.home}/temp/effectivcrm/conf/log4j.xml</param-value>
    </context-param>

    <context-param>
        <param-name>log4jExposeWebAppRoot</param-name>
        <param-value>false</param-value>
    </context-param>

    <!-- Log4j listerner -->
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>Spring MVC 3 Servlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:conf/spring-*-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Spring MVC 3 Servlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

</web-app>

Note dispatcher servlet parameter contextConfigLocation. It sets up the dispatcher servlet to load configuration files from classpath in a modular way. Thats is from respective jars - for view, controllers, service, domain, repository etc.

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