org.apache.struts2.config
Class BeanSelectionProvider

java.lang.Object
  extended by org.apache.struts2.config.BeanSelectionProvider
All Implemented Interfaces:
ConfigurationProvider

public class BeanSelectionProvider
extends Object
implements ConfigurationProvider

Selects the implementations of key framework extension points, using the loaded property constants. The implementations are selected from the container builder using the name defined in its associated property. The default implementation name will always be "struts".

The following is a list of the allowed extension points:

Type Property Scope Description
com.opensymphony.xwork2.ObjectFactory struts.objectFactory singleton Creates actions, results, and interceptors
com.opensymphony.xwork2.ActionProxyFactory struts.actionProxyFactory singleton Creates the ActionProxy
com.opensymphony.xwork2.util.ObjectTypeDeterminer struts.objectTypeDeterminer singleton Determines what the key and and element class of a Map or Collection should be
org.apache.struts2.dispatcher.mapper.ActionMapper struts.mapper.class singleton Determines the ActionMapping from a request and a URI from an ActionMapping
org.apache.struts2.dispatcher.multipart.MultiPartRequest struts.multipart.parser per request Parses a multipart request (file upload)
org.apache.struts2.views.freemarker.FreemarkerManager struts.freemarker.manager.classname singleton Loads and processes Freemarker templates
org.apache.struts2.views.velocity.VelocityManager struts.velocity.manager.classname singleton Loads and processes Velocity templates

Implementations are selected using the value of its associated property. That property is used to determine the implementation by:

  1. Trying to find an existing bean by that name in the container
  2. Trying to find a class by that name, then creating a new bean factory for it
  3. Creating a new delegation bean factory that delegates to the configured ObjectFactory at runtime

Finally, this class overrides certain properties if dev mode is enabled:


Nested Class Summary
(package private)  class BeanSelectionProvider.ObjectFactoryDelegateFactory
           
 
Field Summary
static String DEFAULT_BEAN_NAME
           
private static Log LOG
           
 
Constructor Summary
BeanSelectionProvider()
           
 
Method Summary
(package private)  void alias(Class type, String key, ContainerBuilder builder, Properties props)
           
(package private)  void alias(Class type, String key, ContainerBuilder builder, Properties props, Scope scope)
           
 void destroy()
           
 void init(Configuration configuration)
           
 void loadPackages()
           
 boolean needsReload()
          Tells whether the ConfigurationProvider should reload its configuration
 void register(ContainerBuilder builder, LocatableProperties props)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEFAULT_BEAN_NAME

public static final String DEFAULT_BEAN_NAME
See Also:
Constant Field Values

LOG

private static final Log LOG
Constructor Detail

BeanSelectionProvider

public BeanSelectionProvider()
Method Detail

destroy

public void destroy()
Specified by:
destroy in interface ConfigurationProvider

loadPackages

public void loadPackages()
                  throws ConfigurationException
Specified by:
loadPackages in interface ConfigurationProvider
Throws:
ConfigurationException

init

public void init(Configuration configuration)
          throws ConfigurationException
Specified by:
init in interface ConfigurationProvider
Throws:
ConfigurationException

needsReload

public boolean needsReload()
Description copied from interface: ConfigurationProvider
Tells whether the ConfigurationProvider should reload its configuration

Specified by:
needsReload in interface ConfigurationProvider
Returns:
true, whether the ConfigurationProvider should reload its configuration, falseotherwise.

register

public void register(ContainerBuilder builder,
                     LocatableProperties props)
Specified by:
register in interface ConfigurationProvider

alias

void alias(Class type,
           String key,
           ContainerBuilder builder,
           Properties props)

alias

void alias(Class type,
           String key,
           ContainerBuilder builder,
           Properties props,
           Scope scope)


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