Question

我正在使用泽西2.41 / Java 7 / tomcat 7部署Server-Sent-Event资源。

我收到错误

2013年12月16日上午4:04:40 org.apache.catalina.core.StandardWrapperValve 调用SEVERE：servlet中的Servlet.service（）[ServletAdaptor] 路径[/ trackapp]的上下文引发了异常 [java.lang.UnsupportedOperationException：不是异步处理支持Servlet 2.x容器。]有根本原因 java.lang.UnsupportedOperationException：不是异步处理 Servlet 2.x容器支持。在 org.glassfish.jersey.servlet.WebComponent $ 3.suspend（WebComponent.java:123）在 org.glassfish.jersey.servlet.internal.ResponseWriter.suspend（ResponseWriter.java:109）在 org.glassfish.jersey.server.ServerRuntime $ Responder.writeResponse（ServerRuntime.java:619）在 org.glassfish.jersey.server.ServerRuntime $ Responder.processResponse（ServerRuntime.java:381）在 org.glassfish.jersey.server.ServerRuntime $ Responder.process（ServerRuntime.java:371）在 org.glassfish.jersey.server.ServerRuntime $ 1.run（ServerRuntime.java:262）在org.glassfish.jersey.internal.Errors $ 1.call（Errors.java:271）at at org.glassfish.jersey.internal.Errors $ 1.call（Errors.java:267）at org.glassfish.jersey.internal.Errors.process（Errors.java:315）at org.glassfish.jersey.internal.Errors.process（Errors.java:297）at org.glassfish.jersey.internal.Errors.process（Errors.java:267）at org.glassfish.jersey.process.internal.RequestScope.runInScope（RequestScope.java:318）在 org.glassfish.jersey.server.ServerRuntime.process（ServerRuntime.java:236）在 org.glassfish.jersey.server.ApplicationHandler.handle（ApplicationHandler.java:983）在 org.glassfish.jersey.servlet.WebComponent.service（WebComponent.java:361）在 org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:372）在 org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:335）在 org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:218）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:225）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:123）在 org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:472）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:168）在 org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:98）在 org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:927）在 org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:407）在 org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1001）在 org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:585）在 org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:312）在 java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1145）在 java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:615）在java.lang.Thread.run（Thread.java:744）

我的资源

@POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public String broadcastMessage(String message) {
    OutboundEvent.Builder eventBuilder = new OutboundEvent.Builder();
    OutboundEvent event = eventBuilder.name("message")
        .mediaType(MediaType.TEXT_PLAIN_TYPE)
        .data(String.class, message)
        .build();

    broadcaster.broadcast(event);
    System.out.println("broadcasting listen [" +message+ "]");

    return "Message was '" + message + "' broadcast.";
}

@GET
@Produces(SseFeature.SERVER_SENT_EVENTS)
@Path("/listen")
public EventOutput listenToBroadcast() {
    System.out.println("will listen");
    final EventOutput eventOutput = new EventOutput();
    this.broadcaster.add(eventOutput);
    return eventOutput;
}

的web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="3.0"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         metadata-complete="false">
    <servlet>
        <servlet-name>ServletAdaptor</servlet-name>
        <servlet-class>
            org.glassfish.jersey.servlet.ServletContainer
        </servlet-class>
        <init-param>
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>net.jigarshah.mse.tracker</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
            <param-value>true</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>ServletAdaptor</servlet-name>
        <url-pattern>/webapi/*</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>

</web-app>

客户端JS

<script>
var url="http://localhost:8080/trackapp/webapi/broadcast/listen";
var source=new EventSource(url);
source.onerror=function(event)
{
console.log("error");
};

source.onmessage=function(event)
  {
    console.log(event.data);

  document.getElementById("result").innerHTML+=event.data + "<br>";
  };
</script>
</head>
<body>
<div id="result">
test
</div>

Answer 1

一种可能性是检查此处列出的maven依赖关系 https://jersey.java.net/documentation/latest/modules-and-dependencies.html

您还可以通过jersey邮件列表https://java.net/projects/jersey/lists/users/archive/2013-11/message/63

中的此邮件进行检查

希望这有帮助。

Answer 2

我遇到了同样的麻烦，我的问题是我使用了错误的jersey servlet实现。添加以替换

<dependency>
  <groupId>org.glassfish.jersey.containers</groupId>
  <artifactId>jersey-container-servlet-core</artifactId>
</dependency>

by（注意缺少的-core）

<dependency>
  <groupId>org.glassfish.jersey.containers</groupId>
  <artifactId>jersey-container-servlet</artifactId>
</dependency>

无法使用Jersey和Tomcat 7订阅服务器发送的事件

2 个答案: