CDI对象不可与注入的构造函数一起代理 [英] CDI object not proxyable with injected constructor

问题描述

当尝试将参数注入CDI bean（ApplicationScoped）的构造函数时，遇到以下问题：

When trying to inject arguments into the constructor of a CDI bean (ApplicationScoped), I'm encountering the following issue:

Caused by: org.jboss.weld.exceptions.UnproxyableResolutionException: WELD-001435: Normal scoped bean class xx.Config is not proxyable because it has no no-args constructor - Managed Bean [class xx.Config] with qualifiers [@Default @Named @Any].
    at org.jboss.weld.bean.proxy.DefaultProxyInstantiator.validateNoargConstructor(DefaultProxyInstantiator.java:50)
    at org.jboss.weld.util.Proxies.getUnproxyableClassException(Proxies.java:217)
    at org.jboss.weld.util.Proxies.getUnproxyableTypeException(Proxies.java:178)

但是，我在该类上确实有一个可注入的构造函数：

However, I do have an injectable constructor on the class:

@Inject
public Config(ConfigLocator configLocator) {
    defaultConfigPath = configLocator.getPath();
    doStuff();
}

使用默认构造函数，变量注入和postconstruct方法，一切正常

With a default constructor, variable injection and a postconstruct method, this all works fine, but I'd prefer the constructor injection in this case.

有人认为这里出了什么问题吗？

Any thoughts what is going wrong here?

推荐答案

我们解决了将类拆分为接口和实现的类似问题。
您的情况是这样的：

We resolved similar problem splitting class into interface and implementation. In your case something like this:

public interface Config
{
  // API here
}

@ApplicationScoped @Priority(0)
public class ConfigImpl implements Config
{
  @Inject
  public ConfigImpl(ConfigLocator configLocator) { ... }

  // API implementation here
}

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