CDI 2.0 (焊接)：无法注入非CDI组件

Question

在Wildfly 20上部署的rest端点中，我需要注入javax.ws.rs.core.UriBuilder类的外部非CDI实例。例如：

@Path("...")
public class MyResource
{
  ...
  @Inject
  private UriBuilder uriBuilder;
  ...
}

下面是制作人：

public class UriBuilderProducer
{
  @Produces
  public UriBuilder getUriBuilder()
  {
    return UriBuilder.fromResource(Customer.class);
  }
}

beans.xml文件如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                       http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
   version="2.0" bean-discovery-mode="all">
</beans>

但是，部署失败会引发以下异常：

15:03:24,837 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-3) MSC000001: Failed to start service jboss.deployment.unit."myresource.war".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."myresource.war".WeldStartService: Failed to start service
    at org.jboss.msc@1.4.11.Final//org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1731)
    at org.jboss.msc@1.4.11.Final//org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1559)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    at java.base/java.lang.Thread.run(Thread.java:834)
 Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type UriBuilder with qualifiers @Default
   at injection point [UnbackedAnnotatedField] @Inject private ...MyResource.uriBuilder
   at ...MyResource.uriBuilder(MyResource.java:0)

我错过了什么？

非常感谢您的帮助。

致以亲切的问候，

西摩

Answer 1

我的错，我把beans.xml放错地方了。为了进入结果WAR的WEB-INF目录，需要将其放入src/main/webapp/WEB-INF而不是src/main/resources/WEB-INF，这是基于maven COC (约定重于配置)规则。

当然，将这个文件放在正确的位置可以解决问题。很抱歉给您带来不便。

致以亲切的问候，

西摩