I have created a maven jersey starter webapp. Also I have embedded jetty server in my app using jetty plugin.
My project is working fine when I run my project using mvn jetty:run command.
But when I package my project using mvn clean package command and run the jar file which has name jar-with-dependencies the project throws this exception while returning a json response from a jersey resource.
SEVERE: MessageBodyWriter not found for media type=application/json, type=class com.nitish.freecharge.model.Count, genericType=class com.nitish.freecharge.model.Count.
Here is my pom.xml file
http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.nitish.freecharge</groupId>
<artifactId>wordcount</artifactId>
<packaging>war</packaging>
<version>2.0</version>
<name>wordcount</name>
<build>
<finalName>wordcount</finalName>
<resources>
<resource>
<directory>src/main/java</directory>
</resource>
<resource>
<directory>src/main/resources</directory>
</resource>
<resource>
<directory>src/main/webapp</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.0.v20150612</version>
<configuration>
<scanIntervalSeconds>5</scanIntervalSeconds>
<webApp>
<contextPath>/wordcount</contextPath>
</webApp>
<httpConnector>
<!--host>localhost</host -->
<port>9999</port>
</httpConnector>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>package-jar</id>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.6</version>
<configuration>
<finalName>awesomeProject</finalName>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<appendAssemblyId>false</appendAssemblyId>
<archive>
<manifest>
<mainClass>App</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>9.3.8.v20160314</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>9.3.8.v20160314</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.4</version>
</dependency>
</dependencies>
<properties>
<jersey.version>2.22.2</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
I have created my Main Driver class as App.java in default package. Here is my App.java content
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
public class App {
public static void main(String []gg){
Server server = new Server(9999);
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.NO_SESSIONS);
context.setContextPath("/");
server.setHandler(context);
ServletHolder jerseyServlet = context.addServlet(org.glassfish.jersey.servlet.ServletContainer.class, "/wordcount/*");
jerseyServlet.setInitOrder(1);
jerseyServlet.setInitParameter("jersey.config.server.provider.packages","com.nitish.freecharge.resources");
try {
System.out.println("Starting the server..");
server.start();
System.out.println("Server started");
server.join();
} catch(Exception e) {
System.out.println("Exception in starting the server ");
e.printStackTrace();
}
}
}
Here is my only jersey resource class which gets executed when I access my project url after starting the server :
package com.nitish.freecharge.resources;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import com.nitish.freecharge.dao.FileDAO;
import com.nitish.freecharge.model.Count;
/**
* Root resource (exposed at "count" path) which handles HTTP GET method and returns the count value;
*/
@Path("/count")
public class CountResource {
private FileDAO fileDAO=new FileDAO();
/**
* Method handling HTTP GET requests. The returned object will be sent
* to the client as "application/json" media type.
*
* @return String that will be returned as a application/json response.
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
@QueryParam("query")
public Response getWordCount(@QueryParam("query")String query) {
Error error=null;
Count count=null;
try{
if(query!=null){
query=query.trim();
if(query.length()>0 && query.matches("^[A-Za-z]+$")){
long c=fileDAO.getCount(query.toLowerCase());
count=new Count(c);
}else{
error=new Error("Some Error Occured.Please Try Again With a new word!");
}
}else{
error=new Error("Some Error Occured.Please Try Again!");
}
}catch(Exception e){
error=new Error(e.getMessage());
return Response.status(Status.INTERNAL_SERVER_ERROR).entity(error).build();
}
if(count!=null){
return Response.status(Status.OK).entity(count).build();
}else{
return Response.status(Status.BAD_REQUEST).entity(error).build();
}
}
}
After packaging and run the complete embedded project using command java -jar awesomeProject.jar
I get this output on the server prompt
I have tried a lot and unable to package my embedded webapp in such a way that this issue gets resolved. I am new to maven and packaging. Kindly Help where I am committing mistake.
