Problem with JERSEY and JAX-RS

[Farhan Raja]

I am new to RESTful Services.

I am trying to deploy a simplest REST service using jersey, and JAX-RS, but i am getting this error,

HTTP ERROR: 404

NOT_FOUND

RequestURI=/hosting/demo/example

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Where i think i have done everything right, below is the code i am using for it.

POM.XML (only pasting the part related to jersey)

<dependency>
[tt]<!-- the implementation of JAX-RS -->[/tt]
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.0.1</version>
<scope>compile</scope>
</dependency>

WEB.XML

<servlet>
<servlet-name>jersey</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>mop.core.service.restservices</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>jersey</servlet-name>
<url-pattern>/demo</url-pattern>
</servlet-mapping>

[b]My Class having @GET[/b]

package mop.core.service.restservices;
import javax.swing.JOptionPane;
import javax.ws.rs.Consumes;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
@Path("/example")
public class PricePointRestService {
@GET
@Produces("text/plain")
public String getPricePoint(){
JOptionPane.showMessageDialog(null, "GET CALLED");
return "hello";
}
@POST
@Produces("application/xml")
@Consumes({"application/x-www-form-urlencoded", "multipart/form-data"})
public String doPost(@FormParam("xml") String xml) {
return "<xml></xml>";
}
}

The url i hit is: http://localhost/hosting/demo/example

Please help, its very urgent, thanks in advance.

[Ulf Dittmer]

Try mapping the servlet to "/demo/*" instead of "/demo".

[Farhan Raja]

I have also tried /demo/* but this gives me an exception and i am unable to figure out the reason for that as well,

the stack trae is

HTTP ERROR: 500

org.objectweb.asm.ClassReader.accept(Lorg/objectweb/asm/ClassVisitor;I)V

RequestURI=/hosting/demo/example
Caused by:

java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/objectweb/asm/ClassVisitor;I)V
at com.sun.jersey.server.impl.container.config.AnnotatedClassScanner.analyzeClassFile(AnnotatedClassScanner.java:263)
at com.sun.jersey.server.impl.container.config.AnnotatedClassScanner.indexDir(AnnotatedClassScanner.java:212)
at com.sun.jersey.server.impl.container.config.AnnotatedClassScanner.index(AnnotatedClassScanner.java:185)
at com.sun.jersey.server.impl.container.config.AnnotatedClassScanner.scan(AnnotatedClassScanner.java:129)
at com.sun.jersey.api.core.PackagesResourceConfig.init(PackagesResourceConfig.java:114)
at com.sun.jersey.api.core.PackagesResourceConfig.(PackagesResourceConfig.java:78)
at com.sun.jersey.api.core.PackagesResourceConfig.(PackagesResourceConfig.java:89)
at com.sun.jersey.spi.container.servlet.ServletContainer.createResourceConfig(ServletContainer.java:403)
at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:204)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:400)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:346)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:422)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:356)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:226)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:627)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:149)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:123)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:141)
at org.mortbay.jetty.Server.handle(Server.java:269)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:430)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:687)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:492)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:199)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:339)
at org.mortbay.jetty.nio.HttpChannelEndPoint.run(HttpChannelEndPoint.java:270)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)

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[Ulf Dittmer]

Sounds like the version of Jersey you're using and the version of ASM don't go together. Are you using ASM 3.1? Or maybe Jetty uses ASM internally, and there's a version mismatch?

[Farhan Raja]

I am working in an existing established project, and it is using ASM 1.5.3,

now how can i force jetty/maven to use ASM 3.1, as if i just put ASM 3.1 in repository, then hibernate starts giving exceptions,

so can you please guide me that how can i force in POM.xml(or whatever), to use ASM 3.1 ?

[Ulf Dittmer]

This may help: http://www.benmccann.com/dev-blog/hibernate-asm-incompatibilities/

[Farhan Raja]

Thanks for the help, but my problem still persists, after digging in to the issue more, i have found out that

hibernate and JAX-RS reference implementations cannot work together, as hibernate requires ASM 2.2.3 and JAX-RS requires 3.1, this is present on the URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-358

It seems that this problem is not fixed. Do you know any workaround for this ?

[Ulf Dittmer]

So you've tried using the cglib-nodep library and it doesn't work?

The bug report you linked to mentions two more ways around this, in the first and the last post by Jürgen Zimmermann. Have you tried both, and found that neither works?

[Farhan Raja]

Yeah i have tried these options,

1. i used cglib 2.2, but no help
2. i also used cglib-nodep, but no help
3. I also put javassist in dependencies but my project is using hibernate.cfg.xml file, and javassist can only be configured in hibernate.properties file, not in XML.

So no solutions seems to work for me