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Chapter 29. Frameworks
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## Chapter 29. Frameworks

## Spring Setup

You can assemble and configure Jetty in code or with almost any IoC style framework including Spring. If all you want to do is setup a Jetty server in your stock Spring usage, simply look at the xml snippet below as an example. If you want to replace the jetty-xml being used to start the normal Jetty distribution with spring, you may do so however currently it will not leverage the rest of the module system.

### Jetty-Spring Module

The skeleton of a jetty spring module can be enabled from the jetty-distribution via the module mechanism. For example:

    $ java -jar start.jar --add-to-start=spring

This (or the alternative --add-to-start=spring command) creates a `${jetty.home}/lib/spring` directory and populates it with the jetty-spring integration jar. It does NOT supply the spring jars and their dependencies. You will need to download these and place them into jetty’s classpath - you can use the `${jetty.home}/lib/spring` directory created by spring.mod for this purpose.

### Using Spring to Configure Jetty

Configuring Jetty via Spring is simply a matter of calling the API as Spring beans. The following is an example mimicking the default jetty startup configuration.

    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

    <!-- =============================================================== -->
    <!-- Configure the Jetty Server with Spring                          -->
    <!-- This file is the similar to jetty.xml, but written in spring    -->
    <!-- XmlBeanFactory format.                                          -->
    <!-- =============================================================== -->

    <beans>
        <bean id="contexts" class="org.eclipse.jetty.server.handler.ContextHandlerCollection"/>
        <bean id="server" name="Main" class="org.eclipse.jetty.server.Server" init-method="start" destroy-method="stop">
            <constructor-arg>
                <bean id="threadPool" class="org.eclipse.jetty.util.thread.QueuedThreadPool">
                    <property name="minThreads" value="10"/>
                    <property name="maxThreads" value="50"/>
                </bean>
            </constructor-arg>
            <property name="connectors">
                <list>
                    <bean id="connector" class="org.eclipse.jetty.server.ServerConnector">
                        <constructor-arg ref="server"/>
                        <property name="port" value="8080"/>
                    </bean>
                </list>
            </property>
            <property name="handler">
                <bean id="handlers" class="org.eclipse.jetty.server.handler.HandlerCollection">
                <property name="handlers">
                        <list>
                            <ref bean="contexts"/>
                            <bean id="defaultHandler" class="org.eclipse.jetty.server.handler.DefaultHandler"/>
                        </list>
                    </property>
                </bean>
            </property>
            <property name="beans">
                <list>
                    <bean id="deploymentManager" class="org.eclipse.jetty.deploy.DeploymentManager">
                        <property name="contexts" ref="contexts"/>
                        <property name="appProviders">
                            <list>
                                <bean id="webAppProvider" class="org.eclipse.jetty.deploy.providers.WebAppProvider">
                                    <property name="monitoredDirName" value="webapps"/>
                                    <property name="scanInterval" value="1"/>
                                    <property name="extractWars" value="true"/>
                                </bean>
                            </list>
                        </property>
                    </bean>
                </list>
            </property>
        </bean>
    </beans>

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