Jetty 9 + Weld 2 + Jersey 2 + Jackson 2 + Maven

beans.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans 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/beans_1_1.xsd"
	bean-discovery-mode="all">

</beans>

Jetty 9 + Weld 2 + Jersey 2 + Jackson 2 + Maven

This is a template for creating and running a Jetty web application, using Jersey + Jackson for REST, and Weld for CDI.
It is organized as a maven project, which builds a WAR file deployable to a standalone Jetty server.
The Jetty maven plugin - which is more suitable for development time - is also configured in the pom.xml.

Comments:
	* As Jetty is a servlet-3.0 compatible container, no configuration is needed in web.xml
	* Due to a bug in maven, it's required to use version 3.2.2 or above
	* The JaxRs API classes are to be placed at the package - or below - the one where 'RestConfig.java' is
	* When using in standalone Jetty installation, enable the 'cdi' module before deploying
	  >> java -jar start.jar --add-to-startd=cdi

The tree structure is:

 |-- pom.xml
 `-- src
     `-- main
         |-- java
         |   `-- api
         |       |-- RestConfig.java
         |       `-- JsonConfig.java
         |-- resources
         |   `-- META-INF
         |       `-- beans.xml
         `-- webapp
             `-- WEB-INF
                 |-- web.xml
                 |-- jetty-env.xml
                 |-- jetty-context.xml
                 `-- jetty-web.xml

jetty-context.xml

<?xml version="1.0"  encoding="ISO-8859-1"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure.dtd">
<Configure class="org.eclipse.jetty.webapp.WebAppContext">

	<!-- configuration for WELD, as explained here: https://docs.jboss.org/weld/reference/latest/en-US/html/environments.html#_jetty -->
	<Set name="serverClasses">
		<Array type="java.lang.String">
			<Item>-org.eclipse.jetty.servlet.ServletContextHandler.Decorator</Item>
		</Array>
	</Set>

	<Get class="java.lang.System" name="out">
		<Call name="println">
			<Arg>*** JETTY-CONTEXT loaded</Arg>
		</Call>
	</Get>

</Configure>

jetty-env.xml

<?xml version="1.0"  encoding="ISO-8859-1"?>
<!-- <!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://www.eclipse.org/jetty/configure.dtd"> -->
<Configure id="webAppCtx" class="org.eclipse.jetty.webapp.WebAppContext">

	<!-- configuration for WELD, as explained here: https://docs.jboss.org/weld/reference/latest/en-US/html/environments.html#_jetty -->
	<New id="BeanManager" class="org.eclipse.jetty.plus.jndi.Resource">
		<Arg>
			<Ref id="webAppCtx" />
		</Arg>
		<Arg>BeanManager</Arg>
		<Arg>
			<New class="javax.naming.Reference">
				<Arg>javax.enterprise.inject.spi.BeanManager</Arg>
				<Arg>org.jboss.weld.resources.ManagerObjectFactory</Arg>
				<Arg />
			</New>
		</Arg>
	</New>

	<Get class="java.lang.System" name="out">
		<Call name="println">
			<Arg>*** JETTY-ENV loaded</Arg>
		</Call>
	</Get>

</Configure> 

jetty-web.xml

<?xml version="1.0"  encoding="ISO-8859-1"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure.dtd">
<Configure class="org.eclipse.jetty.webapp.WebAppContext">

	<!-- configuration for deployment in standalone jetty (ignored by jetty-maven-plugin) -->
	<Set name="contextPath">/</Set>

	<Get class="java.lang.System" name="out">
		<Call name="println">
			<Arg>*** JETTY-WEB loaded</Arg>
		</Call>
	</Get>

</Configure>

JsonConfig.java

package api;

import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

@Provider
public class JsonConfig implements ContextResolver<ObjectMapper>
{
	final ObjectMapper mapper;

	public JsonConfig()
	{
		mapper = new ObjectMapper();
//		mapper.registerModule(new JaxbAnnotationModule());
//		mapper.registerModule(new JodaModule());
		mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
		mapper.setSerializationInclusion(Include.NON_NULL);
//		mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
	}

	@Override
	public ObjectMapper getContext(Class<?> type)
	{
		return mapper;
	}
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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.tectonica</groupId>
	<artifactId>jetty9-weld2-jersey2-jackson2-maven</artifactId>
	<version>1</version>
	<packaging>war</packaging>

	<prerequisites>
		<maven>3.2.2</maven>
	</prerequisites>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<version.jetty>9.2.10.v20150310</version.jetty> 	<!-- latest in 9.2.x -->
		<version.jersey>2.14</version.jersey> 				<!-- latest for which 'jersey-gf-cdi-ban-custom-hk2-binding' exists -->
		<version.weld>2.2.5.Final</version.weld> 			<!-- same version used in stand-alone Jetty as the 'cdi' module -->

		<!-- where needed, use the following: -->
		<version.servlet-api>3.0.1</version.servlet-api>	<!-- based on what 'jersey-container-servlet' uses -->
		<version.jackson>2.3.2</version.jackson> 			<!-- based on what 'jersey-media-json-jackson' uses -->
	</properties>

	<dependencies>

		<!-- Jersey with Jackson -->
		<dependency>
			<groupId>org.glassfish.jersey.containers</groupId>
			<artifactId>jersey-container-servlet</artifactId>
			<version>${version.jersey}</version>
		</dependency>
		<dependency>
			<groupId>org.glassfish.jersey.media</groupId>
			<artifactId>jersey-media-json-jackson</artifactId>
			<version>${version.jersey}</version>
		</dependency>

		<!-- Weld for Jersey -->
		<dependency>
			<groupId>org.glassfish.jersey.containers.glassfish</groupId>
			<artifactId>jersey-gf-cdi</artifactId>
			<version>${version.jersey}</version>
		</dependency>
		<dependency>
			<groupId>org.glassfish.jersey.containers.glassfish</groupId>
			<artifactId>jersey-gf-cdi-ban-custom-hk2-binding</artifactId>
			<version>${version.jersey}</version>
		</dependency>
		<dependency>
			<groupId>org.jboss.weld.servlet</groupId>
			<artifactId>weld-servlet-core</artifactId>
			<version>${version.weld}</version>
		</dependency>
		
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.2</version>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
				</configuration>
			</plugin>

			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-war-plugin</artifactId>
				<version>2.4</version>
			</plugin>

			<!-- to execute: mvn clean package jetty:run -->
			<plugin>
				<groupId>org.eclipse.jetty</groupId>
				<artifactId>jetty-maven-plugin</artifactId>
				<version>${version.jetty}</version>
				<configuration>
					<scanIntervalSeconds>2</scanIntervalSeconds>
					<contextXml>${project.basedir}/src/main/webapp/WEB-INF/jetty-context.xml</contextXml>
					<webApp>
						<jettyEnvXml>${project.basedir}/src/main/webapp/WEB-INF/jetty-env.xml</jettyEnvXml>
					</webApp>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>

RestConfig.java

package api;

import javax.ws.rs.ApplicationPath;

import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.server.ResourceConfig;

@ApplicationPath("v1")
public class RestConfig extends ResourceConfig
{
	public RestConfig()
	{
		// register with Jersey (assumes all Jersey resource classes are in this package or below)
		packages(this.getClass().getPackage().getName());

		// activate Jackson-based JSON support
		register(JacksonFeature.class);
	}
}

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_3_0.xsd" id="WebApp_ID"
	version="3.0">

</web-app>