org.springframework.web.servlet.view.velocity
Class VelocityConfigurer

java.lang.Object
  org.springframework.ui.velocity.VelocityEngineFactory
      org.springframework.web.servlet.view.velocity.VelocityConfigurer

All Implemented Interfaces:

InitializingBean, ResourceLoaderAware, VelocityConfig

public class VelocityConfigurer
extends VelocityEngineFactory
implements VelocityConfig, InitializingBean, ResourceLoaderAware

JavaBean to configure Velocity for web usage, via the "configLocation" and/or "velocityProperties" and/or "resourceLoaderPath" bean properties. The simplest way to use this class is to specify just a "resourceLoaderPath"; you do not need any further configuration then.

 <bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
   <property name="resourceLoaderPath"><value>/WEB-INF/velocity/</value></property>
 </bean>

This bean must be included in the application context of any application using Spring's VelocityView for web MVC. It exists purely to configure Velocity; it is not meant to be referenced by application components (just internally by VelocityView). This class implements VelocityConfig in order to be found by VelocityView without depending on the bean name of this configurer. Each DispatcherServlet may define its own VelocityConfigurer if desired, potentially with different template loader paths.

Note that you can also refer to a pre-configured VelocityEngine instance via the "velocityEngine" property, e.g. set up by VelocityEngineFactoryBean, This allows to share a VelocityEngine for web and email usage, for example.

This configurer registers the "spring.vm" Velocimacro library for web views (contained in this package and thus in spring.jar), which makes all of Spring's default Velocity macros available to the views. This allows for using the Spring-provided macros such as follows:

 #springBind("person.age")
 age is ${status.value}

Author:

Rod Johnson, Juergen Hoeller, Darren Davison

See Also:

VelocityEngineFactory.setConfigLocation(org.springframework.core.io.Resource), VelocityEngineFactory.setVelocityProperties(java.util.Properties), VelocityEngineFactory.setResourceLoaderPath(java.lang.String), setVelocityEngine(org.apache.velocity.app.VelocityEngine), VelocityView

Field Summary

Fields inherited from class org.springframework.ui.velocity.VelocityEngineFactory

logger

Constructor Summary

VelocityConfigurer()

Method Summary

void	afterPropertiesSet() Initialize VelocityEngineFactory's VelocityEngine if not overridden by a pre-configured VelocityEngine.
org.apache.velocity.app.VelocityEngine	getVelocityEngine() Return the VelocityEngine for the current web application context.
protected void	postProcessVelocityEngine(org.apache.velocity.app.VelocityEngine velocityEngine) Provides a ClasspathResourceLoader in addition to any default or user-defined loader in order to load the spring Velocity macros from the class path.
void	setVelocityEngine(org.apache.velocity.app.VelocityEngine velocityEngine) Set a pre-configured VelocityEngine to use for the Velocity web configuration: e.g. a shared one for web and email usage, set up via VelocityEngineFactoryBean.

Methods inherited from class org.springframework.ui.velocity.VelocityEngineFactory

createVelocityEngine, getResourceLoader, initSpringResourceLoader, initVelocityResourceLoader, isPreferFileSystemAccess, newVelocityEngine, setConfigLocation, setOverrideLogging, setPreferFileSystemAccess, setResourceLoader, setResourceLoaderPath, setVelocityProperties, setVelocityPropertiesMap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.context.ResourceLoaderAware

setResourceLoader

Constructor Detail

VelocityConfigurer

public VelocityConfigurer()

Method Detail

setVelocityEngine

public void setVelocityEngine(org.apache.velocity.app.VelocityEngine velocityEngine)

Set a pre-configured VelocityEngine to use for the Velocity web configuration: e.g. a shared one for web and email usage, set up via VelocityEngineFactoryBean.

Note that the Spring macros will not be enabled automatically in case of an external VelocityEngine passed in here. Make sure to include spring.vm in your template loader path in such a scenario (if there is an actual need to use those macros).

If this is not set, VelocityEngineFactory's properties (inherited by this class) have to be specified.

afterPropertiesSet

public void afterPropertiesSet()
                        throws IOException,
                               org.apache.velocity.exception.VelocityException

Initialize VelocityEngineFactory's VelocityEngine if not overridden by a pre-configured VelocityEngine.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

IOException

org.apache.velocity.exception.VelocityException

See Also:

VelocityEngineFactory.createVelocityEngine(), setVelocityEngine(org.apache.velocity.app.VelocityEngine)

postProcessVelocityEngine

protected void postProcessVelocityEngine(org.apache.velocity.app.VelocityEngine velocityEngine)

Provides a ClasspathResourceLoader in addition to any default or user-defined loader in order to load the spring Velocity macros from the class path.

Overrides:

postProcessVelocityEngine in class VelocityEngineFactory

Parameters:

velocityEngine - the current VelocityEngine

See Also:

ClasspathResourceLoader

getVelocityEngine

public org.apache.velocity.app.VelocityEngine getVelocityEngine()

Description copied from interface: VelocityConfig

Return the VelocityEngine for the current web application context. May be unique to one servlet, or shared in the root context.

Specified by:

getVelocityEngine in interface VelocityConfig

Returns:

the VelocityEngine