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A module to interface Spring and the Play! framework

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Octocat-spinner-32 conf #7 Using dependency.yml to get spring libs April 25, 2012
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README.textile

Spring module

The spring support module help you to integrate Spring managed beans with a play application.

Enable the Spring module for the application

In the /conf/application.conf file, enable the Spring module by adding this line:

# The spring module
module.spring=${play.path}/modules/spring

Define an application-context.xml registry

In the conf/ directory of the application you can then create a application-context.xml file and define some beans.

For example:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springsource.org/dtd/spring-beans-2.0.dtd">
<beans>

You can also define a separate application context which will be used for running the tests by prefixing the filename with the Play! id, ie. test.application-context.xml. This works also works for dev and prod.

Retrieve beans from application code

You can obtain bean instances from the application code, using the play.modules.spring.Spring helper.

public Application extends Controller {
public static void index() { Test test = Spring.getBeanOfType(Test.class); … }

}

@javax.inject.Inject support

Not implemented yet.

Automatic Component Scanning

Spring 2.5 and later supports auto-wiring and component identification using annotations, obviating the need to define beans explicitly in XML.

To enable component scanning, add this line to the /conf/application.conf file:

play.spring.component-scan=true

Note that enabling this scans for @org.springframework.stereotype.Component, @org.springframework.stereotype.Repository, @org.springframework.stereotype.Service to identify Spring beans. Additionally, running the component scan enables support for annotation based configuration (i.e., @org.springframework.beans.factory.annotation.Autowired, etc).

Limited Scanning

You can limit the classes scanned to specific packages or canonical class names with this line in the /conf/application.conf file:

play.spring.component-scan.base-packages=controllers.beans,services

In this example, only classes whose canonical name start with either ‘controllers.beans’ or ‘services’ will be scanned and identified as beans.

Manual PropertyPlaceholderConfigurer configuration

By default, a org.springframework.beans.factory.config.PropertyPlaceholderConfigurer containing the properties of application.conf is added to the Spring context. In some cases, this may not be desirable as it can conflict with a PropertyPlaceholderConfigurer that you have defined in your application-context.xml. To disable the automatic PropertyPlaceholderConfigurer placement into the context, update application.conf with

play.spring.add-play-properties=false

and then add your own definition to application-context.xml.

If you want to have your own properties and those of your Play! application handled by a PropertyPlaceholderConfigurer, you can add all of them in application-context.xml:

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>classpath:jdbc.properties</value>
            <value>classpath:application.conf</value>
        </list>
    </property>
</bean>

Namespaces

If you want the Spring configuration loader to be namespace aware, you need to explicitly state this in the configuration using

play.spring.namespace-aware=true

Spring profiles

If you want to configure Spring profile(s), add the following to the conf/application.conf

play.spring.profiles=DEV 
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