我希望有人能帮助我。我的Web应用程序基于GWTP框架（2.7），Liferay 6.1.2部署在AS JBoss 7.1.3上。 我最近引入了一个servlet，专用于通过异步http调用（通过Apache HttpAsyncClient 4.1.3）将文件上传到外部系统。 由于某些原因，我还希望Servlet服务异步执行。我进行了以下配置：
MyServlet：
@WebServlet(asyncSupported = true)
public class MyServlet extends HttpServlet {
...
@Override
protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
final AsyncContext ctx = request.startAsync();
ctx.start(new Runnable() {
@Override
public void run() {
// http async call
// http async callback onError, onComplete --> ctx.complete();
}
});
}
web.xml：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<context-param>
<param-name>spring.profiles.active</param-name>
<param-value>@springprofile@</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/META-INF/spring/applicationContext.xml</param-value>
</context-param>
<display-name>myapp</display-name>
<context-param>
<param-name>maxUploadSize</param-name>
<param-value>16106127360</param-value>
</context-param>
<context-param>
<param-name>fileToDeleteAfter</param-name>
<param-value>60000</param-value>
</context-param>
<jsp-config>
<taglib>
<taglib-uri>http://java.sun.com/portlet_2_0</taglib-uri>
<taglib-location>/WEB-INF/tld/liferay-portlet.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://liferay.com/tld/aui</taglib-uri>
<taglib-location>/WEB-INF/tld/aui.tld</taglib-location>
</taglib>
</jsp-config>
<servlet>
<servlet-name>dispatch</servlet-name>
<servlet-class>org.springframework.web.context.support.HttpRequestHandlerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatch</servlet-name>
<url-pattern>/dispatch/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>MyServlet</servlet-name>
<servlet-class>com.example.MyServlet</servlet-class>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>/async/upload</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
</web-app>
jboss-deployment-structure.xml：
<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
<deployment>
<dependencies>
<module name="javax.xml.soap.api" />
<module name="com.liferay.portal" />
<module name="org.apache.commons.logging" />
<module name="com.google.gwt.gwt-servlet"/>
</dependencies>
<exclusions>
<module name="org.apache.log4j" />
<module name="org.slf4j" />
<module name="org.slf4j.impl" />
<module name="org.jboss.logging" />
<module name="org.jboss.logging.jul-to-slf4j-stub" />
<module name="org.jboss.logmanager" />
<module name="org.jboss.logmanager.log4j" />
</exclusions>
</deployment>
</jboss-deployment-structure>
我遇到以下错误：
ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/examples].[MyServlet]] (ajp-IPPUB/172.26.10.11:8009-4) Servlet.service() for servlet MyServlet threw exception: java.lang.IllegalStateException: The servlet or filters that are being used by this request do not support async operation
at org.apache.catalina.connector.Request.startAsync(Request.java:3203) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.connector.Request.startAsync(Request.java:3197) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.connector.RequestFacade.startAsync(RequestFacade.java:990) [jbossweb-7.0.17.Final.jar:]
at com.example.MyServlet.doPost(MyServlet.java:44) [classes:]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) [jboss-servlet-api_3.0_spec-1.0.1.Final.jar:1.0.1.Final]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.1.Final.jar:1.0.1.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:73) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:117) [portal-service.jar:]
at sun.reflect.GeneratedMethodAccessor1030.invoke(Unknown Source) [:1.7.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_51]
at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_51]
at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:67) [portal-service.jar:]
at com.sun.proxy.$Proxy996.doFilter(Unknown Source)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:73) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.PortalClassLoaderFilter.doFilter(PortalClassLoaderFilter.java:72) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) [portal-service.jar:]
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:79) [portal-service.jar:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.17.Final.jar:]
at org.jboss.modcluster.container.jbossweb.JBossWebContext$RequestListenerValve.event(JBossWebContext.java:67)
at org.jboss.modcluster.container.jbossweb.JBossWebContext$RequestListenerValve.invoke(JBossWebContext.java:48)
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:165) [jboss-as-web-7.1.3.Final.jar:7.1.3.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372) [jbossweb-7.0.17.Final.jar:]
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:505) [jbossweb-7.0.17.Final.jar:]
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:453) [jbossweb-7.0.17.Final.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:931) [jbossweb-7.0.17.Final.jar:]
at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]
如何使异步上下文在servlet中工作？