在java 8函数中注入spring bean

Question

这是一个我如何做的问题，也是一个我应该这样做的问题。

我有一个案例，我需要在 Lambda 函数中使用由 Spring 管理的实例。 简而言之，我希望DummyBranch、MandrillBranch 对象和其他分支由 Spring 管理。

public class QOSStrategy {

  public static Function<DistributionMessage, List<Feedback>> executeQOS = (message)-> {
    QOSFilters qosFilters = new QOSFilters();
    List<Branch> providers = qosFilters.getProviderByQOs(message, 
    Arrays.asList(new DummyEmailBranch(), 
        new MandrillBranch(), 
        new EverbrideBranch(), 
        new JavaMailBranch(), 
        new DirectSMSBranch()));
  }
}

我看到的一个选项是从 Spring application-context 中获取它。但是有没有办法使用Annotations 来做到这一点。

谢谢 -帕舒

Answer 1

我创建了一个由 spring 管理的 QOSBean。结果是这样的-

public class QOSStrategy {

public static Function<DistributionMessage,CustomBean, List<Feedback>> executeQOS = (message, qosbean)-> {
QOSFilters qosFilters = (QOSBean)qosbean.getQosFilters();
        List<Branch> providers = qosFilters.getProviderByQOs(message, qosbean.getAllProviders());
}
}



public class QOSBean implements CustomBean {

@Autowired
private QOSFilters qosFilters;

@Autowired
private Branch dummyEmailProvider;
@Autowired
private Branch dummySMSProvider;
@Autowired
private Branch dummyVoiceProvider;
@Autowired
private Branch directSMSProvider;
@Autowired
private Branch everbridgeProvider;
@Autowired
private Branch mandrillProvider;
@Autowired
private Branch javaMailProvider;

public QOSFilters getQosFilters() {
    return qosFilters;
}

public Branch getDummyEmailProvider() {
    return dummyEmailProvider;
}

public Branch getDummySMSProvider() {
    return dummySMSProvider;
}

public List<Branch> getAllProviders (){
    return Arrays.asList(dummyEmailProvider, dummySMSProvider, dummyVoiceProvider, directSMSProvider, everbridgeProvider, mandrillProvider, javaMailProvider);
}

}

Answer 2

您可以自动装配实现相同接口的所有 bean 的集合。

请参阅 Spring 文档here。