Wicket 1.5和Tapestry 5比较

    1.Build Tool
  对于很多开发者来说,build tool不是特别重要,但是这是值得考虑的因素之一。Wicket 1.5和Tapestry 5都使用maven作为build tool,这个它们没有区别。

  2.Configuration 配置
  Wicket 1.5和Tapestry 5都是采用xml,必须要配置的文件是web.xml。其他的,还需要配置xml设置页面调用的action等。这两个框架都认为开发框架应该负责生成URL和页面渲染的顺序,而不是让开发者在xml配置告诉框架如何做。

  Wicket的web.xml
 
<web-app> 
 <display-name>wicket</display-name> 
 <listener> 
 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
 </listener> 
 <context-param> 
 <param-name>contextConfigLocation</param-name> 
 <param-value>classpath:applicationContext.xml</param-value> 
 </context-param> 
 
 <filter> 
 <filter-name>wicket</filter-name> 
 <filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class> 
 <init-param> 
 <param-name>applicationClassName</param-name> 
 <param-value>agilist.lab.WicketApplication</param-value> 
 </init-param> 
 </filter> 
 
 <filter-mapping> 
 <filter-name>wicket</filter-name> 
 <url-pattern>/*</url-pattern> 
 </filter-mapping> 
 
 </web-app> 


如上显示,大多数配置在Java class:WicketApplication中,WicketApplication是一个用来定义你的web应用的java class。

  下面是WicketApplication的部分代码:
public class WicketApplication extends WebApplication{ 
 public WicketApplication(){} 
 
 public void init(){ 
 super.init(); 
 } 
 
 public Class<HomePage> getHomePage() { 
 return HomePage.class; 
 } 
} 


WicketApplication扩展了WebApplication,后者用来通过HTTP协议调用页面。在getHomePage()中返回index.html
  Tapestry 5
  下面看看Tapestry 5的配置,和Wicket类似,唯一必须要配置的文件是web.xml。

<web-app> 
 <display-name>tapestry5</display-name> 
 <context-param> 
 <param-name>tapestry.app-package</param-name> 
 <param-value>agilist.lab</param-value> 
 </context-param> 
 <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> 
 </web-app> 

在web.xml中,你告诉tapestry到哪里去找到你的页面,组件和mixins。在配置中,你的页面,组件和mixins应该在以下目录中:

  * Components: agilist.lab.components

  * Pages: agilist.lab.pages

  * Mixins: agilist.lab.mixins

  tapestry 5也拥有配置java class的能力,也类似Wicket。

public class AppModule 
 { 
 public static void bind(ServiceBinder binder) 
 { 
   binder.bind(Member.class); 
 } 
 
 public static void contributeApplicationDefaults( 
 MappedConfiguration<String, String> configuration) 
 { 
 configuration.add(SymbolConstants.SUPPORTED_LOCALES, "en"); 
 configuration.add(SymbolConstants.PRODUCTION_MODE, "false"); 
 } 
} 


这两个框架在配置方面做的都很棒。

  3.Controller/Page Class
  Wicket 和 Tapestry,都是被称为基于 controller in action的框架,两者都是同一的方式来匹配page和class。
  Tapestry中,比如我有一个AddMemberPage.java,我的模板名字就是AddMemberPage.html,在Wicket中是用AddMemberPage.tml作为模板。

  Wicket:

  wicket page class:

 public class AddMemberPage extends BasePage { 
 private static final Logger logger = LoggerFactory.getLogger(AddMemberPage.class); 
 
 private Member member; 
 
 public AddMemberPage() { 
 add(new AddMemberForm("addMemberForm", new CompoundPropertyModel( new Member() ))); 
 } 
 
 public class AddMemberForm extends Form { 
 public AddMemberForm(String id, final CompoundPropertyModel model) { 
 super(id, model); 
 
 member = (Member)model.getObject(); 
 
 add(new TextField("name")); 
 
 add(new Button("save"){ 
 public void onSubmit(){ 
 logger.info("Member name: {}", member.getName()); 
 } 
 }); 
 } 
 } 
} 

  这是作为父class的BasePage class:

 public class BasePage extends WebPage{ 
 public BasePage() { 
 add(new PageLink("homeLink", HomePage.class) 
 .add(new Label("homeLabel", new ResourceModel("home")))); 

 add(new BookmarkablePageLink("addMemberLink", AddMemberPage.class) 
 .add( new Label("addMemberLabel", new ResourceModel( "member.add" ) ) ) 
 ); 
} 
 } 

Tapestry 5:

  Tapestry 5 Page class:

 public class Add { 
 @Inject private Logger logger; 
 
 @Inject @Property @Parameter private Member member; 
 
 void onSelectedFromSave(){ 
 logger.info("Member name: {}", member.getName()); 
 } 
 } 

和wicket相同。你必须定义layout class给模板使用。和wicket不同点在于 tapestry 5 模板中使用组件而不是继承。下面是layout class:
 public class Layout { 
 } 


 因为layout将作为一个组件,所以必须处于组件包下面。

  wicket page class比tapestry 5长很多,不过很有趣,你会发觉wicket中的page class类似swing controller,而tapestry 5和JSF方式更象。

  4.模板
  Wicket 1.5和Tapestry 5的模板都是使用普通HTML,你不需要调用任何特殊的taglib。

  wicket:

  wicket通过继承方式使用模板,有一个parent父page,作为主要和涉及所有layout的子片断的内容。

 <html> 
 <head> 
 </head> 
 <body> 
 <div id="wrap"> 
 <div id="header"> 
 <a href="#" wicket:id="homeLink"><span wicket:id="homeLabel" /></a> 
 <a href="#" wicket:id="addMemberLink"><span wicket:id="addMemberLabel" /></a></div> 
 <div id="content"> 
 <wicket:child /></div> 
 <div id="footer"> 
 Copyright</div> 
 </div> 
 </body> 
 </html> 

 这和之前的BasePage html layout一致。使用wicket:child标签,就可以让其他子页面继承模板。
<html> 
<head></head> 
<body> 
 <wicket:extend> 
 <form wicket:id="addMemberForm"> 
<table> 
<tr> 
<td>Name</td> 
<td><input type="text" wicket:id="name"/></td> 
</tr> 
<tr> 
<td> </td> 
<td><input type="submit" wicket:id="save" /></td> 
</tr> 
</table> 
</form> 
</wicket:extend> 
</body> 
</html> 

 Tapestry

  Tapestry5 模板使用的是组件方式:

 <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd"> 
 <head> 
 </head> 
 <body> 
 <div id="wrap"> 
 <div id="header"> 
 <a t:type="PageLink" page="home">${message:home}</a> 
 <a t:type="PageLink" page="member/Add">${message:member.add}</a></div> 
 <div id="content"> 
 <t:body /></div> 
 <div id="footer"> 
 Copyright</div> 
 </div> 
 </body> 
 </html> 


t:body用来定义什么地方来放置一个组件模板。

  使用模板:

<t:layout xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd"> 
 <table> 
 <t:form> 
 <tr> 
 <td>Name</td> 
 <td><input t:type="TextField" t:id="name" t:size="30" t:value="prop:member.name"/></td> 
 </tr> 
 <tr> 
 <td></td> 
 <td><input t:type="Submit" t:id="save" value="save" /></td> 
 </tr> 
 </t:form></table> 
 </t:layout> 

5.Spring integration 和Spring 集成

  Wicket and Tapestry中集成spring都很简单,无缝集成。

  wicket:

  在init()加一行代码:

  Java代码

 addComponentInstantiationListener(new SpringComponentInjector(this));



类似这样:

public class WicketApplication extends WebApplication{ 
 public WicketApplication(){} 
 
 public void init(){ 
 super.init(); 
 
 addComponentInstantiationListener(new SpringComponentInjector(this)); 
 } 
 
 public Class<HomePage> getHomePage() { 
 return HomePage.class; 
 } 
} 


接下来就可以使用spring bean从page class中使用annotating @SpringBean调用:

 public class AddMemberPage extends BasePage { 
 private static final Logger logger = LoggerFactory.getLogger(AddMemberPage.class); 
 
 private Member member; 
 
 private @SpringBean MemberService service; 
 
 public AddMemberPage() { 
 add(new AddMemberForm("addMemberForm", new CompoundPropertyModel( new Member() ))); 
 } 
 
 public class AddMemberForm extends Form { 
 public AddMemberForm(String id, final CompoundPropertyModel model) { 
 super(id, model); 
 
 member = (Member)model.getObject(); 
 
 add(new TextField("name")); 
 
 add(new Button("save"){ 
 public void onSubmit(){ 
 logger.info("Member name: {}", member.getName()); 
 service.add(member); 
 } 
}); 
} 
} 
} 

Tapestry 5

  在Tapestry 5中,spring bean被看作tapestry 5的组件,无缝调用和通过tapestry 5 IoC注入。为了集成spring,你需要修改web.xml中一行:

<filter>
<filter-name>app</filter-name>
<filter-class>org.apache.tapestry5.spring.TapestrySpringFilter</filter-class>
</filter>
  接下来就能注入spring bean进入page class通过简单的@Inject annotation:

 public class Add { 
 @Inject private Logger logger; 
 @Inject private MemberService service; 
 
 @Inject @Property @Parameter private Member member; 
 
 void onSelectedFromSave(){ 
 logger.info("Member name: {}", member.getName()); 
 } 
 } 

6.Page unit testing

  Wicket and Tapestry5的Page unit testing都不需要启动一个servlet容器。

  wicket:

  不需要锁定一个特殊测试框架,你可以使用JUnit或者TestNG都没问题,因为wicket提供helper class:

  WicketTester来做page class的Unit testing:

 public class TestHomePage extends TestCase 
 { 
 private WicketTester tester; 
 
 @Override 
 public void setUp() 
 { 
 tester = new WicketTester(new WicketApplication()); 
 } 
 
 public void testRenderMyPage() 
 { 
 //start and render the test page 
 tester.startPage(HomePage.class); 
 
 //assert rendered page class 
 tester.assertRenderedPage(HomePage.class); 
 } 
 } 

Tapestry 5

  也不需要锁定一个特殊测试框架:

 public class MyTest extends Assert 
 { 
 @Test 
 public void test1() 
 { 
 String appPackage = "org.example.app"; 
 String appName = "LocaleApp"; 
 PageTester tester = new PageTester(appPackage, appName, "src/main/webapp"); 
 Document doc = tester.renderPage("MyPage"); 
 assertEquals(doc.getElementById("id1").getChildText(), "hello"); 
 } 
} 

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