Tapestry 5 和 Spring beans 具有相同的接口

发布于 2024-08-29 16:44:11 字数 584 浏览 5 评论 0原文

我在 Tapestry 5 和 Spring 集成方面遇到问题。如果我有多个实现相同接口的 bean，并且我尝试使用 @Inject 注释注入它们，就会出现问题。当然我有一个例外。

我发现一个教程说在这种情况下我必须使用 < code>@Service 注释也是如此，但现在我得到了

org.apache.tapestry5.internal.services.TransformationException
Error obtaining injected value for field 
com.foo.pages.Foo.testService: Service 
id 'someServiceIDeclaredInSpringContextFile' is not defined by any module...

无论如何，问题是：如何将实现相同接口的两个不同的 spring bean 注入 Tapestry 5 页面？

原文

I have a problem with Tapestry 5 and Spring integration. Problem occurs if I have a multiple beans that implement the same interface and I try to inject them with @Inject annotation. Of course I got an exception.

I found a tutorial that says that in that case I have to use @Service annotation too but now I'm getting

org.apache.tapestry5.internal.services.TransformationException
Error obtaining injected value for field 
com.foo.pages.Foo.testService: Service 
id 'someServiceIDeclaredInSpringContextFile' is not defined by any module...

Anyway, question is: How can I inject two different spring beans, that implement a same interface, into Tapestry 5 page?

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寄居人 2024-09-05 16:44:11

我解决了这个问题。

首先，我做了一个新的注释

public @interface Bean {
    String value();
}

，只要有多个 bean 实现相同的接口，我就使用它

@Inject
@Bean("springBeanName")
Service foo;

然后我更改了 org.apache.tapestry5.internal.spring.SpringModuleDef

private ContributionDef createContributionToMasterObjectProvider() {
  ....
  public void contribute(ModuleBuilderSource moduleSource, 
                ServiceResources resources,
                OrderedConfiguration configuration) {
    ....
    switch (beanMap.size()) {
           case 0:
             return null;
           case 1:
             Object bean = beanMap.values().iterator().next();
             return objectType.cast(bean);
           default:
             Bean annotation = annotationProvider.getAnnotation(Bean.class);
             Object springBean = null;
             String beanName = null;

             if (annotation != null) {
               beanName = annotation.value();
               springBean = beanMap.get(beanName);
             } else {
               String message = String.format(
                 "Spring context contains %d beans assignable to type %s: %s.",
                 beanMap.size(),
                 ClassFabUtils.toJavaClassName(objectType),
                 InternalUtils.joinSorted(beanMap.keySet()));
               throw new IllegalArgumentException(message);
             }
             if (springBean != null) {
               return objectType.cast(springBean);
             } else {
               String message = String.format(
                 "Bean [%s] of type %s doesn't exists. Available beans: %s",
                 beanName, ClassFabUtils.toJavaClassName(objectType),
                 InternalUtils.joinSorted(beanMap.keySet()));
               throw new IllegalArgumentException(message);
             }
           }
         }
       };

I solved this problem.

First I made a new annotation

public @interface Bean {
    String value();
}

and I use this wherever I have this one of multiple beans implementing same interface

@Inject
@Bean("springBeanName")
Service foo;

Then I changed org.apache.tapestry5.internal.spring.SpringModuleDef

private ContributionDef createContributionToMasterObjectProvider() {
  ....
  public void contribute(ModuleBuilderSource moduleSource, 
                ServiceResources resources,
                OrderedConfiguration configuration) {
    ....
    switch (beanMap.size()) {
           case 0:
             return null;
           case 1:
             Object bean = beanMap.values().iterator().next();
             return objectType.cast(bean);
           default:
             Bean annotation = annotationProvider.getAnnotation(Bean.class);
             Object springBean = null;
             String beanName = null;

             if (annotation != null) {
               beanName = annotation.value();
               springBean = beanMap.get(beanName);
             } else {
               String message = String.format(
                 "Spring context contains %d beans assignable to type %s: %s.",
                 beanMap.size(),
                 ClassFabUtils.toJavaClassName(objectType),
                 InternalUtils.joinSorted(beanMap.keySet()));
               throw new IllegalArgumentException(message);
             }
             if (springBean != null) {
               return objectType.cast(springBean);
             } else {
               String message = String.format(
                 "Bean [%s] of type %s doesn't exists. Available beans: %s",
                 beanName, ClassFabUtils.toJavaClassName(objectType),
                 InternalUtils.joinSorted(beanMap.keySet()));
               throw new IllegalArgumentException(message);
             }
           }
         }
       };

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