404 Not Found | Java EE parte 3: Finalizando sua loja com REST, JMS, JAAS e WebSockets

package br.com.casadocodigo.loja.resources; import java.util.List; import javax.inject.Inject; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; import br.com.casadocodigo.loja.daos.LivroDao; import br.com.casadocodigo.loja.models.Livro; @Path("livros") public class LivroResource { @Inject private LivroDao dao; @GET @Produces({ MediaType.APPLICATION_JSON }) @Path("json") public List<Livro> ultimosLancamentosJson() { return dao.ultimosLancamentos(); } }

Encontrei a solução. Estavam faltando dependências no pom.xml, vejam como ficou:

<dependencies>
        <dependency>
            <groupId>org.jboss.spec.javax.faces</groupId>
            <artifactId>jboss-jsf-api_2.1_spec</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.enterprise</groupId>
            <artifactId>cdi-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.0.Draft-16</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>javax.transaction-api</artifactId>
            <version>1.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.10.Final</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.3.10.Final</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>3.0.10.Final</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-multipart-provider</artifactId>
            <version>3.0.10.Final</version>
        </dependency>
    </dependencies>

Acredito que as mais importantes eram as do resteasy. Após colocá-las no pom, tem que dar um validate no projeto novamente para as dependências instalarem. Espero que isso ajude alguém.