jersey rest issues

7
votes

I always end up with the "The ResourceConfig instance does not contain any root resource classes" error

I shouldn't even need anything other then jersey-bundle but without it I get errors regarding the asm.jar

package akiraapps.jerseytest;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/hello")
public class Hello {

    // This method is called if TEXT_PLAIN is request
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String sayPlainTextHello() {
        return "Hello Jersey";
    }

    // This method is called if XML is request
    @GET
    @Produces(MediaType.TEXT_XML)
    public String sayXMLHello() {
        return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>";
    }

    // This method is called if HTML is request
    @GET
    @Produces(MediaType.TEXT_HTML)
    public String sayHtmlHello() {
        return "<html> " + "<title>" + "Hello Jersey" + "</title>"
                + "<body><h1>" + "Hello Jersey" + "</body></h1>" + "</html> ";
    }


}

WEB.XML------

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
 <servlet> 
    <servlet-name>Jersey REST Service</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
      <param-name>com.sun.jersey.config.property.packages</param-name>
      <param-value>akiraapps.jerseytest</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>/rest/*</url-pattern>
  </servlet-mapping>
</web-app>

classpath

ERROR LOG:

Jun 16, 2011 11:54:03 AM com.sun.jersey.api.core.PackagesResourceConfig init INFO: Scanning for root resource and provider classes in the packages: akiraapps.jerseytest.Hello Jun 16, 2011 11:54:03 AM com.sun.jersey.server.impl.application.WebApplicationImpl _initiate INFO: Initiating Jersey application, version 'Jersey: 1.7 05/20/2011 11:43 AM' Jun 16, 2011 11:54:03 AM com.sun.jersey.server.impl.application.RootResourceUriRules SEVERE: The ResourceConfig instance does not contain any root resource classes. Jun 16, 2011 11:54:03 AM org.apache.catalina.core.ApplicationContext log SEVERE: StandardWrapper.Throwable com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. at com.sun.jersey.server.impl.application.RootResourceUriRules.(RootResourceUriRules.java:99) at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1298) at com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:167) at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:773) at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:769) at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:769) at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:764) at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488) at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318) at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609) at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556) at javax.servlet.GenericServlet.init(GenericServlet.java:160) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1189) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1103) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:813) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Jun 16, 2011 11:54:03 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Allocate exception for servlet Jersey REST Service com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. at com.sun.jersey.server.impl.application.RootResourceUriRules.(RootResourceUriRules.java:99) at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1298) at com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:167) at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:773) at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:769) at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:769) at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:764) at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488) at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318) at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609) at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556) at javax.servlet.GenericServlet.init(GenericServlet.java:160) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1189) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1103) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:813) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)

4
jersey
I right-clicked on my project->Java EE Tools->Update EAR Libraries. and it seems to be working now. can anyone explain that? – owen gerig
It seems that your server cannot find the .class files (and so the resources). Updating EAR as you said seems to have copied those file in the right place. – yves amsellem
If that solved your problem, add it as an answer and click the checkmark so that others know this problem is solved. – MatrixFrog
i cant it was a comment on my own post. i dont get that option – owen gerig

4 Answers

3
votes

According to Owen,

I right-clicked on my project->Java EE Tools->Update EAR Libraries. and it seems to be working now.

2
votes

I've encountered similar problems after refactoring Jersey web resources so don't forget to clean and recompile your project.

1
votes

I face the similar problem and later solved it by changing .classes files path through following steps:

  1. Go to project properties.
  2. Select Java build path tab and then select source tab.
  3. Change 'Default output folder' which was by default myproject/build/classes to myproject/WebContent/WEB-INF/classes.
-1
votes

i also had to update the project on Maven, right click in the project-> Maven -> Update the porject