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POJersey on Jetty on Android throws ContainerException: The ResourceConfig instance does not contain any root resource classes
 

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  1. POJersey on Jetty on Android throws ContainerException: The ResourceConfig instance does not contain any root resource classes
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    <p>I'm trying to run Jersey on Jetty on Android.</p> <p>I've created an Android that instantiate a Jetty Server with a Jersey Servlet. Anyway when I start Jetty and visit a REST resource (in my case: <code><a href="http://192.168.1.12:8080/api/hello" rel="nofollow noreferrer">http://192.168.1.12:8080/api/hello</a></code>) I get a ContainerException with message: The ResourceConfig instance does not contain any root resource classes. (see exception stack trace below).</p> <p>Any idea why?</p> <p>MORE DETAILS:</p> <p>Logcat is giving the following SEVER WARNINGS. </p> <p><code>The following errors and warnings have been detected with resource and/or provider classes:</p> <p>SEVERE: Missing dependency for field: private java.lang.ThreadLocal com.sun.jersey.server.impl.container.servlet.JSPTemplateProcessor.requestInvoker SEVERE: Missing dependency for field: private java.lang.ThreadLocal com.sun.jersey.server.impl.container.servlet.JSPTemplateProcessor.requestInvoker</code></p> <p>This is strange cause java.lang.ThreadLocal is available for <a href="http://developer.android.com/reference/java/lang/ThreadLocal.html" rel="nofollow noreferrer">Android</a> and HttpServletRequest and HttpServletResponse should be available since I've included servlet-api-2.5.jar in the libs folder.</p> <p>Jersey is dependent on some javax libraries (jaxb-api-2.2.2.jar,jndi-1.2.1.jar,stax-api-1.0-2.jar) which I had to add to project and set the --core-library parameter temporary to ignore dex warning about javax packages as dependencies.</p> <p>I also removed the following classes (RenderedImageProvider,DataSourceProvider,MimeMultipartProvider from package com.sun.jersey.core.impl.provider.entity from jersey core jar) to avoid dependencies on java.awt and javax.mail.</p> <p>EXCEPTION trace:</p> <pre><code>javax.servlet.UnavailableException: com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. at org.eclipse.jetty.servlet.ServletHolder.makeUnavailable(ServletHolder.java:409) at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:450) at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:331) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:935) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:404) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:184) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:870) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:346) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1051) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:592) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:426) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:520) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:528) at java.lang.Thread.run(Thread.java:1019) </code></pre> <p>Start Server Android Activity:</p> <pre><code>public class StartServerActivity extends Activity { private Server webServer; private final static String LOG_TAG = "Jetty"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); System.setProperty("java.net.preferIPv4Stack", "true"); System.setProperty("java.net.preferIPv6Addresses", "false"); webServer = new Server(8080); ServletHolder servletHolder = new ServletHolder(com.sun.jersey.spi.container.servlet.ServletContainer.class); servletHolder.setInitParameter("com.sun.jersey.config.property.packages", "com.famenu.server.resources"); ServletContextHandler servletContextHandler = new ServletContextHandler(webServer, "/api", true, false); servletContextHandler.addServlet(servletHolder, "/hello"); webServer.setHandler(servletContextHandler); try { webServer.start(); Log.d(LOG_TAG, "started Web server"); } catch (Exception e) { Log.d(LOG_TAG, "unexpected exception starting Web server: " + e); } } </code></pre> <p>}</p> <p>Jersey Resource:</p> <pre><code>package com.famenu.server.resources; </code></pre> <p>import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces;</p> <p>@Path("/") public class HelloResource {</p> <pre><code>@GET @Produces("text/plain") public String getMsg() { return "Hello Resource"; } </code></pre> <p>}</p> <p>I'm using Jetty 7.3.0.v20110203 , Jersey 1.12 , Android 1.6 I arrived till this point after another exception explained <a href="https://stackoverflow.com/questions/11191346/jersey-on-jetty-on-android-throws-containerexception-no-webapplication-provide">here</a></p>
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