首先说明一下，并不是每一个Tapestry项目的ApplicationModule都是AppModule，而是与这个工程的总的filter决定的。

    <filter><filter-name>app</filter-name><filter-class>org.apache.tapestry5.TapestryFilter</filter-class></filter><filter-mapping><filter-name>app</filter-name><url-pattern>/*</url-pattern></filter-mapping>

也就是说与红色部分相关联。

This module is a good place to configure and extend Tapestry, or to place your own service definitions.

这个模块是配置或者扩展Tapestry的一个好地方，我们也可以在这里放置我们自定义的服务。

1  public static void bind(ServiceBinder binder)binder的功能就是通过：a binder.bind(SomeService.class, SomeServiceImpl.class);b binder.bind(SomeService.class);这样我们就可以Page页面中用@Inject，注入一个SomeService服务。而用到的就是SomeServiceImpl的方法或者是SomeService的方法。

2 Tell Tapestry about our custom translators, validators, and their message files.告诉Tapestry我们自己的转换器，验证器和message文件。public static void contributeTranslatorAlternatesSource( MappedConfiguration<String, Translator> configuration, ThreadLocale threadLocale)public static void contributeFieldValidatorSource(MappedConfiguration<String, Validator> configuration)public void contributeComponentMessagesSource(OrderedConfiguration<String> configuration)

3 Tell Tapestry about our custom ValueEncoders. We do this by contributing configuration to Tapestry's ValueEncoderSource service.
告诉Tapestry我们自己的编码器（Encoder）。public static void contributeValueEncoderSource(MappedConfiguration<Class, Object> configuration){　　configuration.addInstance(Person.class, PersonEncoder.class);}

4 public static void contributeApplicationDefaults(MappedConfiguration<String, String> configuration)这个就是用来修改Tapestry的许多默认的东西的。目前我知道的有：

configuration.add(SymbolConstants.SUPPORTED_LOCALES, "en_US,en_GB,fr"); // 修改国际化信息configuration.add(JQuerySymbolConstants.SUPPRESS_PROTOTYPE, "false"); // 修改对JQuery的排他configuration.add(JQuerySymbolConstants.JQUERY_ALIAS, "$j"); // 修改JQuery的默认符号configuration.add(SymbolConstants.START_PAGE_NAME, "welcome");// 修改默认的首页configuration.add(SymbolConstants.CHARSET, "utf-8");// 修改默认字符集configuration.add(ComponentParameterConstants.GRID_ROWS_PER_PAGE, "15"); //修改grid默认的表示行数

5 Tell Tapestry how to handle JBoss 7's classpath URLs - JBoss uses a "virtual file system".告诉Tapestry如何去处理JBoss 7的classpath URLs。因为JBoss使用一个虚拟的文件系统。public static void contributeServiceOverride(MappedConfiguration<Class, Object> configuration) { 　　configuration.add(ClasspathURLConverter.class, new ClasspathURLConverterJBoss7()); }

6 Tell Tapestry how to handle @EJB in page and component classes.告訴Tapestry如何在頁面中處理@EJB@Primary
public static void contributeComponentClassTransformWorker(OrderedConfiguration<ComponentClassTransformWorker2> configuration) {configuration.addInstance("EJB", EJBAnnotationWorker.class, "before:Property");
}

慢慢总结吧，待续。。。