在Osgi中以编程方式注册ServletContainer
我正在开发一个带有OSGI的JAX-RS应用程序，其中资源是动态加载的。 为此，我需要以编程方式注册ServletContainer，然后我可以调用方法ServletContainer.reload（ResourceConfig）。 我正在运行OSGI环境，支持servlet 3.x，使用PAX-WEB 3.0.2和Jersey 2.4。 问题是当我想访问实现Server Sent Event的资源时，Jersey会引发一个不支持异步的错误，因为它在Servlet 2.x中运行。
这里例外：
2013-11-05 00:22:37,675 | WARN | qtp27902282-62 | ServletHandler | pse.jetty.servlet.ServletHandler 492 | 60 - org.eclipse.jetty.aggregate.jetty-all-server - 8.1.9.v20130131 | javax.servlet.ServletException: java.lang.UnsupportedOperationException: Asynchronous processing not supported on Servlet 2.x container. at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:373)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1448)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:185)[70:org.ops4j.pax.web.pax-web-runtime:3.0.2] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:69)[71:org.ops4j.pax.web.pax-web-jetty:3.0.2] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:210)[71:org.ops4j.pax.web.pax-web-jetty:3.0.2] at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:77)[71:org.ops4j.pax.web.pax-web-jetty:3.0.2] at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.Server.handle(Server.java:368)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:488)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:932)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:994)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)[60:org.eclipse.jetty.aggregate.jetty-all-server:8.1.9.v20130131] at java.lang.Thread.run(Thread.java:724)[:1.7.0_40] Caused by: java.lang.UnsupportedOperationException: Asynchronous processing not supported on Servlet 2.x container. at org.glassfish.jersey.servlet.WebComponent$1.suspend(WebComponent.java:120)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] at org.glassfish.jersey.servlet.internal.ResponseWriter.suspend(ResponseWriter.java:109)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:621)[219:org.glassfish.jersey.core.jersey-server:2.3.1] at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:357)[219:org.glassfish.jersey.core.jersey-server:2.3.1] at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:347)[219:org.glassfish.jersey.core.jersey-server:2.3.1] at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:258)[219:org.glassfish.jersey.core.jersey-server:2.3.1] at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)[220:org.glassfish.jersey.core.jersey-common:2.3.1] at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)[220:org.glassfish.jersey.core.jersey-common:2.3.1] at org.glassfish.jersey.internal.Errors.process(Errors.java:315)[220:org.glassfish.jersey.core.jersey-common:2.3.1] at org.glassfish.jersey.internal.Errors.process(Errors.java:297)[220:org.glassfish.jersey.core.jersey-common:2.3.1] at org.glassfish.jersey.internal.Errors.process(Errors.java:267)[220:org.glassfish.jersey.core.jersey-common:2.3.1] at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:318)[220:org.glassfish.jersey.core.jersey-common:2.3.1] at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:235)[219:org.glassfish.jersey.core.jersey-server:2.3.1] at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:983)[219:org.glassfish.jersey.core.jersey-server:2.3.1] at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:359)[224:org.glassfish.jersey.containers.jersey-container-servlet-core:2.3.1] 我尝试以各种方式注册ServletContainer，但没有一个工作，我认为问题出在注册和设置Jersey，因为我记录了一个基于服务器发送事件的异步Servlet，一切都很完美。
代码示例：
ServletContainer container = new ServletContainer(); ... ... webContainerRef = bc.getServiceReference(WebContainer.class); started = webContainerRef != null; if (started) { final WebContainer webContainer = (WebContainer) bc .getService(webContainerRef); if (webContainer != null) { // create a default context to share between registrations final HttpContext httpContext = webContainer .createDefaultHttpContext(); // set a session timeout of 10 minutes webContainer.setSessionTimeout(10, httpContext); // register the hello world servlet for filtering with url // pattern final Dictionary initParamsServlet = new Hashtable(); initParamsServlet.put("javax.ws.rs.Application", "com.workingflows.osgi.jaxrs.samples.conf.MyJaxApp"); webContainer.registerServlet( container, // registered new String[]{"/rest/*"}, // url patterns initParamsServlet, // init params 1, true, httpContext // http context ); webContainer.registerServlet( (HttpServlet) new SseServlet(), // registered new String[]{"/servlet/sse"}, // url patterns initParamsServlet, // init params 1, true, httpContext // http context ); } } ... ...
这是我的代码库 。 参见OsgiJersey项目。
有什么建议？
谢谢
你的类路径上是否有jersey-container-servlet模块（这个模块应该用于Servlet 3.x支持）？
你遇到这个问题的原因是Jersey无法找到合适的AsyncContextDelegateProvider （来自jersey-container-servlet模块），它使用jersey-container-servlet-core模块（Servlet 2.x支持）的实现，这种方式失败了。
错误在于，泽西模块是在与注册servletContainer的应用程序模块相同的级别上启动的。
[ 127] [ Resolved] [ 30] jersey-container-servlet-core (2.4.0) [ 161] [ Active] [ 30] jersey-core-common (2.4.0) [ 162] [ Active] [ 30] jersey-core-client (2.4.0) [ 163] [ Active] [ 30] jersey-core-server (2.4.0) [ 164] [ Active] [ 30] jersey-container-servlet (2.4.0) [ 165] [ Active] [ 30] jersey-media-sse (2.4.0)
我开始在30级的jersey堆叠，80级的应用程序，一切正常！ 重要的模块是jersey-core-server，它增加了对servlet 3.x的支持。
[ 168] [ Active] [ 80] OsgiJersey OSGi Bundle (1.0.0.SNAPSHOT)
查看我的存储库中的示例