Java/EJB3/Open EJB

injection of datasource

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.ejb.Stateful;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.List;
import java.util.ArrayList;
@Stateful(name = "Movies")
public class MoviesImpl implements Movies {
    /**
     * The field name "movieDatabase" matches the DataSource we
     * configure in the TestCase via :
     * p.put("movieDatabase", "new://Resource?type=DataSource");
     *
     * This would also match an equivalent delcaration in an openejb.xml:
     * <Resource id="movieDatabase" type="DataSource"/>
     *
     * If you"d like the freedom to change the field name without
     * impact on your configuration you can set the "name" attribute
     * of the @Resource annotation to "movieDatabase" instead.
     */
    @Resource
    private DataSource movieDatabase;
    @PostConstruct
    private void construct() throws Exception {
        Connection connection = movieDatabase.getConnection();
        try {
            PreparedStatement stmt = connection.prepareStatement("CREATE TABLE movie ( director VARCHAR(255), title VARCHAR(255), year integer)");
            stmt.execute();
        } finally {
            connection.close();
        }
    }
    public void addMovie(Movie movie) throws Exception {
        Connection conn = movieDatabase.getConnection();
        try {
            PreparedStatement sql = conn.prepareStatement("INSERT into movie (director, title, year) values (?, ?, ?)");
            sql.setString(1, movie.getDirector());
            sql.setString(2, movie.getTitle());
            sql.setInt(3, movie.getYear());
            sql.execute();
        } finally {
            conn.close();
        }
    }
    public void deleteMovie(Movie movie) throws Exception {
        Connection conn = movieDatabase.getConnection();
        try {
            PreparedStatement sql = conn.prepareStatement("DELETE from movie where director = ? AND title = ? AND year = ?");
            sql.setString(1, movie.getDirector());
            sql.setString(2, movie.getTitle());
            sql.setInt(3, movie.getYear());
            sql.execute();
        } finally {
            conn.close();
        }
    }
    public List<Movie> getMovies() throws Exception {
        ArrayList<Movie> movies = new ArrayList<Movie>();
        Connection conn = movieDatabase.getConnection();
        try {
            PreparedStatement sql = conn.prepareStatement("SELECT director, title, year from movie");
            ResultSet set = sql.executeQuery();
            while ( set.next() ) {
                Movie movie = new Movie();
                movie.setDirector(set.getString("director"));
                movie.setTitle(set.getString("title"));
                movie.setYear(set.getInt("year"));
                movies.add( movie );
            }
        } finally {
            conn.close();
        }
        return movies;
    }
}

injection of entitymanager and entity class

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.jpa;
import org.superbiz.injection.jpa.Movie;
import org.superbiz.injection.jpa.Movies;
import javax.ejb.Stateless;
import javax.ejb.Stateful;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.PersistenceContextType;
import java.util.List;
@Stateful(name = "Movies")
public class MoviesImpl implements Movies {
    @PersistenceContext(unitName = "movie-unit", type = PersistenceContextType.EXTENDED)
    private EntityManager entityManager;
    public void addMovie(Movie movie) throws Exception {
        entityManager.persist(movie);
    }
    public void deleteMovie(Movie movie) throws Exception {
        entityManager.remove(movie);
    }
    public List<Movie> getMovies() throws Exception {
        Query query = entityManager.createQuery("SELECT m from Movie as m");
        return query.getResultList();
    }
}
///////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.jpa;
import org.superbiz.injection.jpa.Movie;
import java.util.List;
/**
 * @version $Revision: 607077 $ $Date: 2007-12-27 06:55:23 -0800 (Thu, 27 Dec 2007) $
 */
public interface Movies {
    void addMovie(Movie movie) throws Exception ;
    void deleteMovie(Movie movie) throws Exception ;
    List<Movie> getMovies() throws Exception ;
}

///////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.jpa;
import javax.persistence.Entity;
@Entity
public class Movie {
    private String director;
    private String title;
    private int year;
    public Movie() {
    }
    public Movie(String director, String title, int year) {
        this.director = director;
        this.title = title;
        this.year = year;
    }
    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;
    }

}

jpa hibernate (Open EJB)

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.h3jpa;
import javax.persistence.*;
@Entity
public class Movie {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    private String director;
    private String title;
    private int year;
    public Movie() {
    }
    public Movie(String director, String title, int year) {
        this.director = director;
        this.title = title;
        this.year = year;
    }
    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;
    }

}
////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.h3jpa;
import org.superbiz.injection.h3jpa.Movie;
import java.util.List;
/**
 * @version $Revision: 607077 $ $Date: 2007-12-27 06:55:23 -0800 (Thu, 27 Dec 2007) $
 */
public interface Movies {
    void addMovie(Movie movie) throws Exception ;
    void deleteMovie(Movie movie) throws Exception ;
    List<Movie> getMovies() throws Exception ;
}

////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.h3jpa;
import org.superbiz.injection.h3jpa.Movie;
import org.superbiz.injection.h3jpa.Movies;
import javax.ejb.Stateful;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.PersistenceContextType;
import java.util.List;
@Stateful(name = "Movies")
public class MoviesImpl implements Movies {
    @PersistenceContext(unitName = "movie-unit", type = PersistenceContextType.EXTENDED)
    private EntityManager entityManager;
    public void addMovie(Movie movie) throws Exception {
        entityManager.persist(movie);
    }
    public void deleteMovie(Movie movie) throws Exception {
        entityManager.remove(movie);
    }
    public List<Movie> getMovies() throws Exception {
        Query query = entityManager.createQuery("SELECT m from Movie as m");
        return query.getResultList();
    }
}

LocalHome annotation (Open EJB)

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.hello;
import javax.ejb.EJBLocalHome;
import javax.ejb.CreateException;
/**
 * @version $Revision: 607077 $ $Date: 2007-12-27 06:55:23 -0800 (Thu, 27 Dec 2007) $
 */
public interface HelloEjbLocalHome extends EJBLocalHome {
    HelloEjbLocal create() throws CreateException;
}
///////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.hello;
import javax.ejb.EJBLocalObject;
/**
 * @version $Revision: 607077 $ $Date: 2007-12-27 06:55:23 -0800 (Thu, 27 Dec 2007) $
 */
public interface HelloEjbLocal extends EJBLocalObject {
    String sayHello();
}
  
///////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.hello;
import javax.ejb.LocalHome;
import javax.ejb.Stateless;
/**
 * @version $Revision: 607077 $ $Date: 2007-12-27 06:55:23 -0800 (Thu, 27 Dec 2007) $
 */
@Stateless
@LocalHome(HelloEjbLocalHome.class)
public class HelloBean {
    public String sayHello() {
        return "Hello, World!";
    }
}

Remote stab

  
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
//START SNIPPET: code
package org.superbiz.telephone;
import javax.ejb.Remote;
import javax.ejb.Stateful;
import java.util.ArrayList;
import java.util.List;
@Remote
@Stateful
public class TelephoneBean implements Telephone {
    private static final String[] answers = {
            "How nice.",
            "Oh, of course.",
            "Interesting.",
            "Really?",
            "No.",
            "Definitely.",
            "I wondered about that.",
            "Good idea.",
            "You don"t say!",
    };
    private List<String> conversation = new ArrayList<String>();
    public void speak(String words) {
        conversation.add(words);
    }
    public String listen() {
        if (conversation.size() == 0) {
            return "Nothing has been said";
        }
        String lastThingSaid = conversation.get(conversation.size() - 1);
        return answers[Math.abs(lastThingSaid.hashCode()) % answers.length];
    }
}
//END SNIPPET: code

Stateful session bean simple

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.counter;
import javax.ejb.Stateful;
/**
 * This is an EJB 3 style pojo stateful session bean
 * Every stateful session bean implementation must be annotated
 * using the annotation @Stateful
 * This EJB has 2 business interfaces: CounterRemote, a remote business
 * interface, and CounterLocal, a local business interface
 *
 * Per EJB3 rules when the @Remote or @Local annotation isn"t present
 * in the bean class (this class), all interfaces are considered
 * local unless explicitly annotated otherwise.  If you look
 * in the CounterRemote interface, you"ll notice it uses the @Remote
 * annotation while the CounterLocal interface is not annotated relying
 * on the EJB3 default rules to make it a local interface.
 */
//START SNIPPET: code
@Stateful
public class CounterImpl implements CounterLocal, CounterRemote {
    private int count = 0;
    public int increment() {
        return ++count;
    }
    public int reset() {
        return (count = 0);
    }
}
//END SNIPPET: code

//////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.counter;
import javax.ejb.Remote;
/**
 * This is an EJB 3 remote business interface
 * A remote business interface must be annotated with the @Remote
 * annotation
 */
//START SNIPPET: code
@Remote
public interface CounterRemote {
    public int increment();
    public int reset();
}
//END SNIPPET: code

//////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.counter;
/**
 * This is an EJB 3 local business interface
 * A local business interface may be annotated with the @Local
 * annotation, but it"s optional. A business interface which is
 * not annotated with @Local or @Remote is assumed to be Local
 */
//START SNIPPET: code
public interface CounterLocal {
    public int increment();
    public int reset();
}
//END SNIPPET: code

stateless EJB for calculation

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.calculator;
import javax.ejb.Stateless;
/**
 * This is an EJB 3 style pojo stateless session bean
 * Every stateless session bean implementation must be annotated
 * using the annotation @Stateless
 * This EJB has 2 business interfaces: CalculatorRemote, a remote business
 * interface, and CalculatorLocal, a local business interface
 * 
 */
//START SNIPPET: code
@Stateless
public class CalculatorImpl implements CalculatorRemote, CalculatorLocal {
  public int sum(int add1, int add2) {
    return add1+add2;
  }
  public int multiply(int mul1, int mul2) {
    return mul1*mul2;
  }
}
//END SNIPPET: code
///////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.calculator;
import javax.ejb.Remote;
/**
 * This is an EJB 3 remote business interface
 * A remote business interface must be annotated with the @Remote
 * annotation
 */
//START SNIPPET: code
@Remote
public interface CalculatorRemote {
  
  public int sum(int add1, int add2);
  
  public int multiply(int mul1, int mul2);
}
//END SNIPPET: code

///////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.calculator;
/**
 * This is an EJB 3 local business interface
 * A local business interface may be annotated with the @Local
 * annotation, but it"s optional. A business interface which is 
 * not annotated with @Local or @Remote is assumed to be Local
 */
//START SNIPPET: code
public interface CalculatorLocal {
  
  public int sum(int add1, int add2);
  
  public int multiply(int mul1, int mul2);
}
//END SNIPPET: code

Transaction in EJB

  
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.superbiz.injection.tx;
import javax.ejb.Stateful;
import javax.ejb.TransactionAttribute;
import static javax.ejb.TransactionAttributeType.MANDATORY;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;
import javax.persistence.Query;
import java.util.List;
@Stateful(name = "Movies")
@TransactionAttribute(MANDATORY)
public class MoviesImpl implements Movies {
    @PersistenceContext(unitName = "movie-unit", type = PersistenceContextType.TRANSACTION)
    private EntityManager entityManager;
    public void addMovie(Movie movie) throws Exception {
        entityManager.persist(movie);
    }
    public void deleteMovie(Movie movie) throws Exception {
        entityManager.remove(movie);
    }
    public List<Movie> getMovies() throws Exception {
        Query query = entityManager.createQuery("SELECT m from Movie as m");
        return query.getResultList();
    }
}

web service and Stateless session bean (Open EJB)

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.calculator;
import javax.jws.WebService;
//END SNIPPET: code
/**
 * This is an EJB 3 webservice interface
 * A webservice interface must be annotated with the @Local
 * annotation.
 */
//START SNIPPET: code
@WebService(targetNamespace="http://superbiz.org/wsdl" )
public interface CalculatorWs {
  public int sum(int add1, int add2);
  public int multiply(int mul1, int mul2);
}
//END SNIPPET: code

////////////////

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.superbiz.calculator;
import javax.ejb.Stateless;
import javax.jws.WebService;
/**
 * This is an EJB 3 style pojo stateless session bean
 * Every stateless session bean implementation must be annotated
 * using the annotation @Stateless
 * This EJB has a single interface: CalculatorWs a webservice interface.
 */
//START SNIPPET: code
@Stateless
@WebService(
        portName = "CalculatorPort",
        serviceName = "CalculatorWsService",
        targetNamespace = "http://superbiz.org/wsdl",
        endpointInterface = "org.superbiz.calculator.CalculatorWs")
public class CalculatorImpl implements CalculatorWs {
    public int sum(int add1, int add2) {
        return add1 + add2;
    }
    public int multiply(int mul1, int mul2) {
        return mul1 * mul2;
    }
}
//END SNIPPET: code