CDI 1.2/2.0 on Tomcat

beans.xml

<?xml version="1.0"?>
<!-- WEB-INF/beans.xml -->
<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"/>

Context.xml

<?xml version="1.0" encoding="UTF-8"?>
<Context>
  <!-- webapp/META-INF/Context.xml -->
  <Manager pathname=""/>
  <Resource name="BeanManager"
    auth="Container"
    type="javax.enterprise.inject.spi.BeanManager"
    factory="org.jboss.weld.resources.ManagerObjectFactory"/>
</Context>

pom.xml

<!-- CDI 2.0 -->
<dependency>
  <groupId>javax.enterprise</groupId>
  <artifactId>cdi-api</artifactId>
  <version>2.0-PFD2</version>
</dependency>
<dependency>
  <groupId>org.jboss.weld.servlet</groupId>
  <artifactId>weld-servlet-core</artifactId>
  <version>3.0.0.CR2</version>
</dependency>

web.xml

<web-app 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"
	version="3.1">

  <!-- Comment the listener and resource-env-ref on Tomcat 8.5.4 -->
	<listener>
	   <listener-class>org.jboss.weld.environment.servlet.Listener</listener-class>
	</listener>
	<resource-env-ref>
	   <resource-env-ref-name>BeanManager</resource-env-ref-name>
	   <resource-env-ref-type>
	      javax.enterprise.inject.spi.BeanManager
	   </resource-env-ref-type>
	</resource-env-ref>
</web-app>