我在尝试在球衣中启用Hk2 Events时遇到问题。
ResourceConfig:
import org.glassfish.hk2.utilities.TopicDistributionModule;
public class Application extends ResourceConfig {
public Application() throws IOException {
super(Application.class);
register(TopicDistributionModule.class);
}
}
资源:
@Path("/")
public class MainResource {
@Inject
private Topic<MyClass> myClassTopic;
@GET
@Produces(MediaType.TEXT_HTML)
public String index() {
return "index";
}
}
我得到一个错误:
java.lang.IllegalStateException: There is no implementation of the TopicDistributionService to distribute the message
at org.jvnet.hk2.internal.TopicImpl.publish(TopicImpl.java:79) ~[hk2-locator-2.3.0.jar:?]
at ... MainResource.index(MainResource.java:21) ~[classes/:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_20]
最佳答案
TopicDistributionModule
是AbstractBinder
,据我了解,应该将其注册为实例,而不是按类注册。这个
register(new TopicDistributionModule());
应该消除异常,因为它注册了默认的
TopicDistributionService
。在发布事件/消息时,只需确保有一个“实时”订户即可