如何注入两个相同类型的EJB？ [英] How can I inject two EJBs of same type?

问题描述

我试图用不同的注释注入两个相同类型的EJB。
但注入的实例是相同的。

  @Path（/ some）
 public class SomeResource {
 
 @Inject 
 @SomePostConstructionAnnotationForSomeService（this）
 private SomeService s1; 
 
 @Inject 
 @SomePostConstructionAnnotationForSomeService（that）
 private SomeService s2; 
} 
  

SomeService类看起来像这样。

  public SomeService {
 
 @PostConstruct 
 private void construct（）{
 //找到注释并执行其他操作。 
} 
 
 @Inject 
私人注入点注入点; 
} 
  

问题是只有 s1 被调用， s2 等于 s1 。

解决方案

如果 SomeService 是 CDI bean，它的范围是 @Dependent 或没有范围（也意味着 @Dependent 注入另一个bean）。它有什么范围？如果 SomeService 是 EJB bean not CDI 这不会工作。

更新：
您可以将SomeService移动到基类，并通过扩展此类并注入来创建两个不同的EJB bean这些EJB。

I'm trying to inject two EJBs of same type with different annotation. But the instances injected are same.

@Path("/some")
public class SomeResource {

    @Inject
    @SomePostConstructionAnnotationForSomeService("this")
    private SomeService s1;

    @Inject
    @SomePostConstructionAnnotationForSomeService("that")
    private SomeService s2;
}

SomeService class looks like this.

public SomeService {

    @PostConstruct
    private void constructed() {
        // find the annotation and do something else.
    }

    @Inject
    private InjectionPoint injectionPoint;
}

The problem is that only s1 is invoked and s2 is equals s1.

解决方案

This will work if SomeService is CDI bean and its scope is @Dependent or no scope (that also means @Dependent when injected into another bean). What scope does it have? If SomeService is EJB bean not CDI this won't work.

UPDATE: You could move SomeService to a base class and create two different EJB beans by extending this class and inject these EJBs.

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