我在使用带有@ServerEndPoint注释类的spring时遇到了麻烦
我正在使用Springboot 1.2.3,我正试图弄清楚如何拥有一个端点的单个实例
@SpringBootApplication
@EnableJpaRepositories
@EnableWebSocket
public class ApplicationServer {
public static void main(String[] args) {
SpringApplication.run(ApplicationServer.class,args);
}
}
弹簧配置：
@ConditionalOnWebApplication
@Configuration
public class WebSocketConfigurator {
@Bean
public ServerEndPoint serverEndpoint() {
return new ServerEndPoint();
}
@Bean
public ServerEndpointExporter serverEndpointExporter() {
return new ServerEndpointExporter();
}
}
WebSocket端点：
@ServerEndpoint(value = "/",decoders = MessageDecoder.class,encoders = MessageEncoder.class,configurator = SpringConfigurator.class)
public class ServerEndPoint {
private static final Logger LOG = LoggerFactory.getLogger(ServerEndPoint.class);
public static final Set这是基于Spring WebSocket JSR-356 tutorial,但我有以下错误：
java.lang.IllegalStateException: Failed to find the root WebApplicationContext. Was ContextLoaderListener not used?
at org.springframework.web.socket.server.standard.SpringConfigurator.getEndpointInstance(SpringConfigurator.java:68)
at org.apache.tomcat.websocket.pojo.PojoEndpointServer.onOpen(PojoEndpointServer.java:50)
at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:138)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
我已经在嵌入模式和外部tomcat 8和jetty 9中进行了测试(在外部模式下,我删除了de Spring配置文件)但出现了同样的错误.
the only workaround i’ve found is to create a custom configurator.
public class SpringEndpointConfigurator extends ServerEndpointConfig.Configurator {
private static WebApplicationContext wac;
public SpringEndpointConfigurator() {
}
public SpringEndpointConfigurator(WebApplicationContext wac) {
SpringEndpointConfigurator.wac = wac;
}
@Override
public beanfactory().getBean(endpointClass);
return (endPoint != null) ? endPoint : wac.getAutowireCapablebeanfactory().createBean(endpointClass);
}
它是使用参数化构造函数创建的@Bean.
我一定错过了使用SpringConfigurator类完成它的东西,但我不知道是什么.
最佳答案
SpringConfigurator使用ContextLoader来获取spring上下文. Spring Boot确实设置了ServletContext,但它从不使用ContextLoaderListener来初始化ContextLoader来保存spring上下文的静态.您可以尝试添加ContextLoaderListener,或者作为一种解决方法,您可以编写自己的上下文持有者和配置程序.
原文链接：https://www.f2er.com/springboot/432396.html这是一个例子：
第一个上下文持有者和配置者：
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.beanfactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import javax.websocket.server.ServerEndpointConfig;
public class CustomSpringConfigurator extends ServerEndpointConfig.Configurator implements ApplicationContextAware {
/**
* Spring application context.
*/
private static volatile beanfactory context;
@Override
public 要获取上下文,我们需要将其配置为Bean：
@ConditionalOnWebApplication
@Configuration
public class WebSocketConfigurator {
...
@Bean
public CustomSpringConfigurator customSpringConfigurator() {
return new CustomSpringConfigurator(); // This is just to get context
}
}
然后你需要正确设置配置器：
@ServerEndpoint(value = "/",configurator = CustomSpringConfigurator.class)
public class ServerEndPoint {
...
}
作为旁注,是的,如果删除SpringConfigurator,您的应用程序将启动,您可以处理请求.但是你不能自动装配其他bean.
