javax.ws.rs.NotFoundException: Could not find reso

Question

I am facing following problem. I have spent more than 3 days on this but cannot find a solution. Please guide me what I am doing wrong here. I am new to Resteasy with wildfly.

Here is the stacktrace

19:05:57,610 WARN  [org.jboss.resteasy.core.ExceptionHandler] (default task-14) failed to execute: javax.ws.rs.NotFoundException: Could not find resource for full path: http://localhost:8080/admin-ws/services/user/getUser
    at org.jboss.resteasy.core.registry.ClassNode.match(ClassNode.java:73) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.registry.RootClassNode.match(RootClassNode.java:48) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.ResourceMethodRegistry.getResourceInvoker(ResourceMethodRegistry.java:444) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.getInvoker(SynchronousDispatcher.java:234) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:171) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) [resteasy-jaxrs-3.0.8.Final.jar:]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_20]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_20]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_20]

Here is my web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
</web-app>

Here is the Application class.

package com.abc.admin.services.config;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

@ApplicationPath("/services")
public class WebConfig extends Application {

}

Here is the web service class.

package com.abc.admin.service;

import java.io.Serializable;

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

import com.abc.commons.ws.entity.UserWsPojo;

@Path("/user")
public class UserResource implements Serializable {

    private static final long serialVersionUID = 6766329501327292893L;

    @GET
    @Path("/services/user/getUser")
    @Produces(MediaType.APPLICATION_JSON)
    public UserWsPojo getUser(String id) {
        UserWsPojo uwp = new UserWsPojo();
        uwp.setName("Aayush");
        uwp.setSurname("Devmurari");
        return uwp;
    }
}

Now in the above mentioned class I also tried to change the path of @Path with /getUser and also tried full path i.e. @Path("/services/user/getUser") none of these are working everytime I get the same error.

If you need to see anything else please let me know. I will post it here.

Thanks for reading and helping.

P.S I have tried reading other questions on SO, documentation on RestEasy none of this helped me much. However I corrected my code while looking for the solution.

Based on the answers I did this too

@Path("/user")
public class UserResource implements Serializable {

    private static final long serialVersionUID = 6766329501327292893L;

    @GET
    @Path("/getUser")
    @Produces(MediaType.APPLICATION_JSON)
    public UserWsPojo getUser() {
        UserWsPojo uwp = new UserWsPojo();
        uwp.setName("Aayush");
        uwp.setSurname("Devmurari");
        return uwp;
    }
}

Other things are same as they are, still I am getting the same error.

22:15:58,489 WARN  [org.jboss.resteasy.core.ExceptionHandler] (default task-5) failed to execute: javax.ws.rs.NotFoundException: Could not find resource for full path: http://localhost:8080/admin-ws/services/user/getUsers
    at org.jboss.resteasy.core.registry.ClassNode.match(ClassNode.java:73) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.registry.RootClassNode.match(RootClassNode.java:48) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.ResourceMethodRegistry.getResourceInvoker(ResourceMethodRegistry.java:444) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.getInvoker(SynchronousDispatcher.java:234) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:171) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) [resteasy-jaxrs-3.0.8.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) [resteasy-jaxrs-3.0.8.Final.jar:]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_20]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_20]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_20]

Answer 1

• Base:

  (1) http://localhost:8080/admin-ws  (I assume `admin-ws` is the app name)
  

• @ApplicationPath("/services") == append /services to Base

  (2) http://localhost:8080/admin-ws/services
  

• @Path("/user") == append /user to previous

  (3) http://localhost:8080/admin-ws/services/user
  

• @Path("/services/user/getUser") == append /services/user/getUser to previous

  (4) http://localhost:8080/admin-ws/services/user/services/user/getUser
             //This is the winner with your current set up
  

• What you are using:

  http://localhost:8080/admin-ws/services/user/getUser
  

  What's different?

How it Should Look : to follow good REST (naming included) practices

@ApplicationPath("/services")
public class WebConfig extends Application {
}

@Path("/users")
public class UserResource implements Serializable {

    @Inject
    private UserService userService;

    @GET
    @Path("/{id}")
    @Produces(MediaType.APPLICATION_JSON)
    public UserWsPojo getUser(@PathParam("id") String id) {
        UserWsPojo uwp = userService.getUserById(id);
        return uwp;
    }
}

Access:

http://localhost:8080/admin-ws/services/users/12344
                                       // some user id

Answer 2

Its hard to say for sure, but one thing I see is that you are passing a parameter but not mapping any parameter in the URL. This would be more correct:

@GET
@Path("/getUser/{id}")
@Produces(MediaType.APPLICATION_JSON)
public UserWsPojo getUser(@PathParam("id") String id) {
  // do things with stuff
}

And then the full URL would be /admin-ws/services/user/getUser/1 to get a user with ID 1.

Answer 3

Consolidating all the response and below code should work. Tested in tomcat 7.0.56, RESTEasy 3.0.10, Netbeans 8.0.2

WebConfig.java:

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("/services")
public class WebConfig extends Application {
 // No methods defined inside
}

SayHello.java:

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;
import javax.ws.rs.Produces;
@Path("/greet")
public class SayHello {
 @GET
    @Path("/{username}")
    @Produces("text/html")
    public Response printMessage(@PathParam("username") String username) {
        return Response.status(200).entity("Hello " + username).build();
    }

}

Netbeans generated web.xml: no change needed

<?xml version="1.0" encoding="UTF-8"?>
<!-- With RESTEasy no web.xml configuration required-->
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
     version="3.0">
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
</web-app>

URL to Your REST SERVICE:

http://hostname:<port>/<yourappcontext>/services/greet/<enterusername>

Expected Response:

Hello <username>

Netbeans generated POM.XML: (make sure to include resteasy-servlet-initializer dependency if using tomcat and version 2.3 or greater for maven-war-plugin)

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.easyrest</groupId>
    <artifactId>easyrest</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>easyrest</name>

    <properties>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <!-- Add POM dependencies -->
    <repositories>
        <repository>
            <id>org.jboss.resteasy</id>
            <url>http://repo.maven.apache.org/maven2/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>3.0.10.Final</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-servlet-initializer</artifactId>
            <version>3.0.10.Final</version>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>6.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                    <compilerArguments>
                        <endorseddirs>${endorsed.dir}</endorseddirs>
                    </compilerArguments>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.1</version>
                <executions>
                    <execution>
                        <phase>validate</phase>
                        <goals>
                            <goal>copy</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${endorsed.dir}</outputDirectory>
                            <silent>true</silent>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>javax</groupId>
                                    <artifactId>javaee-endorsed-api</artifactId>
                                    <version>6.0</version>
                                    <type>jar</type>
                                </artifactItem>
                            </artifactItems>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

Answer 4

I faced the same problem (javax.ws.rs.NotFoundException: Could not find resource for full path ...). Based on this link, the steps to solve the issue are below:

1) Set the application class:

/**
 * Application class
 */
package com.abc.admin.services.config;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

@ApplicationPath("/services") // the begining of the Webservice URL
public class WebConfig extends Application {
    private Set<Object> singletons = new HashSet<Object>();

    public WebConfig() {
        singletons.add(new UserResource());
    }

    @Override
    public Set<Object> getSingletons() {
        return singletons;
    }
}

2) Set the Resource class:

/**
 * Resource class
 */
package com.abc.admin.service;

import java.io.Serializable;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import com.abc.commons.ws.entity.UserWsPojo;

@Path("/user")
public class UserResource implements Serializable {

    private static final long serialVersionUID = 6766329501327292893L;

    @GET
    // there is a URL concatenation to access the method (.../services/user/getUser)
    @Path("/getUser") 
    @Produces(MediaType.APPLICATION_JSON)
    public UserWsPojo getUser(String id) {
        UserWsPojo uwp = new UserWsPojo();
        uwp.setName("Aayush");
        uwp.setSurname("Devmurari");
        return uwp;
    }
}

3) Set the 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" 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">
  <display-name>restContext</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
  </welcome-file-list>
  <context-param>
    <param-name>resteasy.servlet.mapping.prefix</param-name>
    <param-value>/rest</param-value>
  </context-param>
  <servlet>
    <servlet-name>resteasy-servlet</servlet-name>
    <servlet-class>
        org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher
    </servlet-class>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>com.abc.admin.services.config.WebConfig</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>resteasy-servlet</servlet-name>
    <url-pattern>/rest/*</url-pattern> <!-- /* is not a comment, but part of the setting -->
  </servlet-mapping>
</web-app>

4) Test the configuration in a browser:

http://localhost:8080/restContext/rest/services/user/getUser

Answer 5

I got the same issue when I tried with 3.0.11.Final

<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.11.Final</version>
</dependency>

but when I tried with another version it worked.

<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.4.Final</version>
</dependency>

Hope this helps.

Answer 6

This works for all my services.

This is a runtime exception indicating a resource requested by a client was not found on the server.
Add below entry into your web.xml :

<context-param>
        <param-name>resteasy.resources</param-name>
        <param-value>com.org.abc.xyz.MainClassName</param-value>
</context-param>

You can specify fully qualified name of your JAX-RS resource class name you want to register. If you have multiple classes entries, use comma delimiter.