:index-group: REST
:jbake-type: page
:jbake-status: status=published
= MovieFun REST

Este exemplo mostra o CRUD de um aplicativo engraçado para filmes.
O web client é construído usando o backbone e o back-end é construído com
JAX-RS, JPA para a persistência em um banco de dados H2.

== O código

=== ApplicationConfig

Aqui, use anotações JAX-RS para criar recursos. 
@ApplicationPath identifica o caminho do aplicativo que serve como o URI base para todos os recursos.
A implementação do método getClasses será chamada pela estrutura JAX-RS para obter informações sobre este aplicativo. No exemplo a seguir, ele define dois recursos: LoadRest e MoviesRest.

[source,java]
----
package org.superbiz.moviefun.rest;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

@ApplicationPath("/rest")
public class ApplicationConfig extends Application {

    @Override
    @SuppressWarnings("unchecked")
    public Set<Class<?>> getClasses() {
        return new HashSet<Class<?>>(Arrays.asList(LoadRest.class, MoviesRest.class));
    }
}
----

=== LoadRest

É um POJO que é mapeado para um URL raiz (`load`) com o anotação @Path e possui métodos Java para servir solicitações a este URL raiz e seus sub-URLs. Nesse caso, só tem uma solicitação POST onde usa um EJB (MoviesBean) injetado na sua classe para fazer um carregamento inicial de dados no banco de dados.

[source,java]
----
package org.superbiz.moviefun.rest;

import org.superbiz.moviefun.Movie;
import org.superbiz.moviefun.MoviesBean;

import javax.ejb.EJB;
import javax.ws.rs.POST;
import javax.ws.rs.Path;

@Path("load")
public class LoadRest {
    @EJB
    private MoviesBean moviesBean;

    @POST
    public void load() {
        moviesBean.addMovie(new Movie("Wedding Crashers", "David Dobkin", "Comedy", 7, 2005));
        moviesBean.addMovie(new Movie("Starsky & Hutch", "Todd Phillips", "Action", 6, 2004));
        moviesBean.addMovie(new Movie("Shanghai Knights", "David Dobkin", "Action", 6, 2003));
        moviesBean.addMovie(new Movie("I-Spy", "Betty Thomas", "Adventure", 5, 2002));
        moviesBean.addMovie(new Movie("The Royal Tenenbaums", "Wes Anderson", "Comedy", 8, 2001));
        moviesBean.addMovie(new Movie("Zoolander", "Ben Stiller", "Comedy", 6, 2001));
        moviesBean.addMovie(new Movie("Shanghai Noon", "Tom Dey", "Comedy", 7, 2000));
    }

}
----

=== MovieRest

É um POJO que é mapeado para um URL raiz (`filmes`) com o anotação @Path e possui métodos Java para veicular solicitações de filmes de entidades no formato JSON de acordo com a anotação @Produces. Aqui tem um método para cada método HTTP (GET, POST, PUT, DELETE).

[source,java]
----
package org.superbiz.moviefun.rest;

import org.superbiz.moviefun.Movie;
import org.superbiz.moviefun.MoviesBean;

import javax.ejb.EJB;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import java.util.List;

@Path("movies")
@Produces({"application/json"})
public class MoviesRest {

    @EJB
    private MoviesBean service;

    @GET
    @Path("{id}")
    public Movie find(@PathParam("id") Long id) {
        return service.find(id);
    }

    @GET
    public List<Movie> getMovies(@QueryParam("first") Integer first, @QueryParam("max") Integer max,
                                 @QueryParam("field") String field, @QueryParam("searchTerm") String searchTerm) {
        return service.getMovies(first, max, field, searchTerm);
    }

    @POST
    @Consumes("application/json")
    public Movie addMovie(Movie movie) {
        service.addMovie(movie);
        return movie;
    }

    @PUT
    @Path("{id}")
    @Consumes("application/json")
    public Movie editMovie(Movie movie) {
        service.editMovie(movie);
        return movie;
    }

    @DELETE
    @Path("{id}")
    public void deleteMovie(@PathParam("id") long id) {
        service.deleteMovie(id);
    }

    @GET
    @Path("count")
    @Produces(MediaType.TEXT_PLAIN)
    public int count(@QueryParam("field") String field, @QueryParam("searchTerm") String searchTerm) {
        return service.count(field, searchTerm);
    }

}
----

=== Movie

Essa é a entidade Movie que será persistida pela JPA.

[source,java]
----
package org.superbiz.moviefun;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.xml.bind.annotation.XmlRootElement;

@Entity
@XmlRootElement(name = "movie")
public class Movie {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    private String director;
    private String title;
    private int year;
    private String genre;
    private int rating;

    public Movie() {
    }

    public Movie(String title, String director, String genre, int rating, int year) {
        this.director = director;
        this.title = title;
        this.year = year;
        this.genre = genre;
        this.rating = rating;
    }

    public Movie(String director, String title, int year) {
        this.director = director;
        this.title = title;
        this.year = year;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getDirector() {
        return director;
    }

    public void setDirector(String director) {
        this.director = director;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public String getGenre() {
        return genre;
    }

    public void setGenre(String genre) {
        this.genre = genre;
    }

    public int getRating() {
        return rating;
    }

    public void setRating(int rating) {
        this.rating = rating;
    }
}
----

=== MoviesBean

Este é o EJB de acordo com a anotação @Stateless. Ele usa a persistência da unidade `movie-unit` para persistir persistir entidades de filmes.
[source,java]
----
package org.superbiz.moviefun;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.persistence.metamodel.EntityType;
import java.util.List;

@Stateless
public class MoviesBean {

    @PersistenceContext(unitName = "movie-unit")
    private EntityManager entityManager;

    public Movie find(Long id) {
        return entityManager.find(Movie.class, id);
    }

    public void addMovie(Movie movie) {
        entityManager.persist(movie);
    }

    public void editMovie(Movie movie) {
        entityManager.merge(movie);
    }

    public void deleteMovie(long id) {
        Movie movie = entityManager.find(Movie.class, id);
        entityManager.remove(movie);
    }

    public List<Movie> getMovies(Integer firstResult, Integer maxResults, String field, String searchTerm) {
        CriteriaBuilder qb = entityManager.getCriteriaBuilder();
        CriteriaQuery<Movie> cq = qb.createQuery(Movie.class);
        Root<Movie> root = cq.from(Movie.class);
        EntityType<Movie> type = entityManager.getMetamodel().entity(Movie.class);
        if (field != null && searchTerm != null && !"".equals(field.trim()) && !"".equals(searchTerm.trim())) {
            Path<String> path = root.get(type.getDeclaredSingularAttribute(field.trim(), String.class));
            Predicate condition = qb.like(path, "%" + searchTerm.trim() + "%");
            cq.where(condition);
        }
        TypedQuery<Movie> q = entityManager.createQuery(cq);
        if (maxResults != null) {
            q.setMaxResults(maxResults);
        }
        if (firstResult != null) {
            q.setFirstResult(firstResult);
        }
        return q.getResultList();
    }

    public int count(String field, String searchTerm) {
        CriteriaBuilder qb = entityManager.getCriteriaBuilder();
        CriteriaQuery<Long> cq = qb.createQuery(Long.class);
        Root<Movie> root = cq.from(Movie.class);
        EntityType<Movie> type = entityManager.getMetamodel().entity(Movie.class);
        cq.select(qb.count(root));
        if (field != null && searchTerm != null && !"".equals(field.trim()) && !"".equals(searchTerm.trim())) {
            Path<String> path = root.get(type.getDeclaredSingularAttribute(field.trim(), String.class));
            Predicate condition = qb.like(path, "%" + searchTerm.trim() + "%");
            cq.where(condition);
        }
        return entityManager.createQuery(cq).getSingleResult().intValue();
    }

    public void clean() {
        entityManager.createQuery("delete from Movie").executeUpdate();
    }
}
----

== Executando

A execução do exemplo é bastante simples. No diretório `moviefun-rest` execute:

[source,java]
----
$ mvn clean install
----

O que deve criar uma saída como a seguir.

[source,java]
----
INFO: OpenJPA dynamically loaded a validation provider.
Dec 18, 2018 1:31:44 PM org.apache.openejb.assembler.classic.ReloadableEntityManagerFactory createDelegate
INFO: PersistenceUnit(name=movie-unit, provider=org.apache.openjpa.persistence.PersistenceProviderImpl) - provider time 36ms
Dec 18, 2018 1:31:44 PM org.apache.openejb.assembler.classic.JndiBuilder bind
INFO: Jndi(name=MoviesBeanLocalBean) --> Ejb(deployment-id=MoviesBean)
Dec 18, 2018 1:31:44 PM org.apache.openejb.assembler.classic.JndiBuilder bind
INFO: Jndi(name=global/test/MoviesBean!org.superbiz.moviefun.MoviesBean) --> Ejb(deployment-id=MoviesBean)
Dec 18, 2018 1:31:44 PM org.apache.openejb.assembler.classic.JndiBuilder bind
INFO: Jndi(name=global/test/MoviesBean) --> Ejb(deployment-id=MoviesBean)
Dec 18, 2018 1:31:44 PM org.apache.openejb.util.LogStreamAsync run
INFO: Existing thread singleton service in SystemInstance(): org.apache.openejb.cdi.ThreadSingletonServiceImpl@94f6bfb
Dec 18, 2018 1:31:44 PM org.apache.openejb.cdi.ManagedSecurityService <init>
INFO: Some Principal APIs could not be loaded: org.eclipse.microprofile.jwt.JsonWebToken out of org.eclipse.microprofile.jwt.JsonWebToken not found
Dec 18, 2018 1:31:44 PM org.apache.openejb.util.LogStreamAsync run
INFO: OpenWebBeans Container is starting...
Dec 18, 2018 1:31:44 PM org.apache.webbeans.plugins.PluginLoader startUp
INFO: Adding OpenWebBeansPlugin : [CdiPlugin]
Dec 18, 2018 1:31:44 PM org.apache.openejb.cdi.CdiScanner handleBda
INFO: Using annotated mode for file:/Users/josediaz/Projects/tomitribe/tomee/examples/moviefun-rest/target/arquillian-test-working-dir/0/test/WEB-INF/classes/ looking all classes to find CDI beans, maybe think to add a beans.xml if not there or add the jar to exclusions.list
Dec 18, 2018 1:31:44 PM org.apache.webbeans.config.BeansDeployer validateInjectionPoints
INFO: All injection points were validated successfully.
Dec 18, 2018 1:31:44 PM org.apache.openejb.util.LogStreamAsync run
INFO: OpenWebBeans Container has started, it took 466 ms.
Dec 18, 2018 1:31:44 PM org.apache.openejb.assembler.classic.Assembler startEjbs
INFO: Created Ejb(deployment-id=MoviesBean, ejb-name=MoviesBean, container=Default Stateless Container)
Dec 18, 2018 1:31:44 PM org.apache.openejb.assembler.classic.Assembler startEjbs
INFO: Started Ejb(deployment-id=MoviesBean, ejb-name=MoviesBean, container=Default Stateless Container)
Dec 18, 2018 1:31:45 PM org.apache.openejb.assembler.classic.Assembler createApplication
INFO: Deployed Application(path=/Users/josediaz/Projects/tomitribe/tomee/examples/moviefun-rest/target/arquillian-test-working-dir/0/test)
Dec 18, 2018 1:31:45 PM org.apache.myfaces.ee.MyFacesContainerInitializer onStartup
INFO: Using org.apache.myfaces.ee.MyFacesContainerInitializer
Dec 18, 2018 1:31:45 PM org.apache.myfaces.ee.MyFacesContainerInitializer onStartup
INFO: Added FacesServlet with mappings=[/faces/*, *.jsf, *.faces, *.xhtml]
Dec 18, 2018 1:31:45 PM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Dec 18, 2018 1:31:45 PM org.apache.tomee.myfaces.TomEEMyFacesContainerInitializer addListener
INFO: Installing <listener>org.apache.myfaces.webapp.StartupServletContextListener</listener>
Dec 18, 2018 1:31:45 PM org.apache.myfaces.config.DefaultFacesConfigurationProvider getStandardFacesConfig
INFO: Reading standard config META-INF/standard-faces-config.xml
Dec 18, 2018 1:31:46 PM org.apache.myfaces.config.DefaultFacesConfigurationProvider getClassloaderFacesConfig
INFO: Reading config : jar:file:/Users/josediaz/.m2/repository/org/apache/openwebbeans/openwebbeans-el22/2.0.8/openwebbeans-el22-2.0.8.jar!/META-INF/faces-config.xml
Dec 18, 2018 1:31:46 PM org.apache.myfaces.config.DefaultFacesConfigurationProvider getClassloaderFacesConfig
INFO: Reading config : jar:file:/Users/josediaz/.m2/repository/org/apache/openwebbeans/openwebbeans-jsf/2.0.8/openwebbeans-jsf-2.0.8.jar!/META-INF/faces-config.xml
Dec 18, 2018 1:31:46 PM org.apache.myfaces.config.LogMetaInfUtils logArtifact
INFO: Artifact 'myfaces-api' was found in version '2.3.2' from path 'file:/Users/josediaz/.m2/repository/org/apache/myfaces/core/myfaces-api/2.3.2/myfaces-api-2.3.2.jar'
Dec 18, 2018 1:31:46 PM org.apache.myfaces.config.LogMetaInfUtils logArtifact
INFO: Artifact 'myfaces-impl' was found in version '2.3.2' from path 'file:/Users/josediaz/.m2/repository/org/apache/myfaces/core/myfaces-impl/2.3.2/myfaces-impl-2.3.2.jar'
Dec 18, 2018 1:31:46 PM org.apache.myfaces.util.ExternalSpecifications isCDIAvailable
INFO: MyFaces CDI support enabled
Dec 18, 2018 1:31:46 PM org.apache.myfaces.spi.impl.DefaultInjectionProviderFactory getInjectionProvider
INFO: Using InjectionProvider org.apache.myfaces.spi.impl.CDIAnnotationDelegateInjectionProvider
Dec 18, 2018 1:31:47 PM org.apache.myfaces.util.ExternalSpecifications isBeanValidationAvailable
INFO: MyFaces Bean Validation support enabled
Dec 18, 2018 1:31:47 PM org.apache.myfaces.application.ApplicationImpl getProjectStage
INFO: Couldn't discover the current project stage, using Production
Dec 18, 2018 1:31:47 PM org.apache.myfaces.config.FacesConfigurator handleSerialFactory
INFO: Serialization provider : class org.apache.myfaces.shared_impl.util.serial.DefaultSerialFactory
Dec 18, 2018 1:31:47 PM org.apache.myfaces.config.annotation.DefaultLifecycleProviderFactory getLifecycleProvider
INFO: Using LifecycleProvider org.apache.myfaces.config.annotation.Tomcat7AnnotationLifecycleProvider
Dec 18, 2018 1:31:47 PM org.apache.myfaces.webapp.AbstractFacesInitializer initFaces
INFO: ServletContext initialized.
Dec 18, 2018 1:31:47 PM org.apache.myfaces.view.facelets.ViewPoolProcessor initialize
INFO: org.apache.myfaces.CACHE_EL_EXPRESSIONS web config parameter is set to "noCache". To enable view pooling this param must be set to "alwaysRecompile". View Pooling disabled.
Dec 18, 2018 1:31:47 PM org.apache.myfaces.webapp.StartupServletContextListener contextInitialized
INFO: MyFaces Core has started, it took [1867] ms.
Dec 18, 2018 1:31:47 PM null
INFO: Starting OpenJPA 3.0.0
Dec 18, 2018 1:31:47 PM null
INFO: Using dictionary class "org.apache.openjpa.jdbc.sql.HSQLDictionary" (HSQL Database Engine 2.3.2 ,HSQL Database Engine Driver 2.3.2).
Dec 18, 2018 1:31:47 PM null
INFO: Connected to HSQL Database Engine version 2.2 using JDBC driver HSQL Database Engine Driver version 2.3.2. 
Dec 18, 2018 1:31:53 PM null
INFO: Creating subclass and redefining methods for "[class org.superbiz.moviefun.Movie]". This means that your application will be less efficient than it would if you ran the OpenJPA enhancer.
Dec 18, 2018 1:31:54 PM org.apache.openejb.assembler.classic.Assembler destroyApplication
INFO: Undeploying app: /Users/josediaz/Projects/tomitribe/tomee/examples/moviefun-rest/target/arquillian-test-working-dir/0/test
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.77 sec - in org.superbiz.moviefun.MoviesEJBTest

Results :

Tests run: 3, Failures: 0, Errors: 0, Skipped: 0
----