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Hibernate and Rastful WS stack overflow?

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logandtr

Post subject: Hibernate and Rastful WS stack overflow?

Posted: Fri Aug 09, 2013 10:34 am

Newbie

Joined: Fri Aug 09, 2013 10:22 am
Posts: 1

.Hi, the code is this, in this I've used json for output.

DB:

Persons(id, name)

Phonenumbers(number, id_persons) FK id_person references Persons(id)

Java code:

Code:

package com.app.model;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.FetchType;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.ManyToOne;

import javax.persistence.Table;

import org.jboss.resteasy.annotations.providers.jaxb.JAXBConfig;

@Entity

@Table(name = "phonenumbers", catalog = "test")

public class Phonenumbers implements java.io.Serializable {

    private static final long serialVersionUID = -8122359598003938895L;

    private String number;

    private Persons persons;

    public Phonenumbers() {

    }

    public Phonenumbers(String number) {

        this.number = number;

    }

    public Phonenumbers(String number, Persons persons) {

        this.number = number;

        this.persons = persons;

    }

    @Id

    @Column(name = "number", unique = true, nullable = false, length = 20)

    public String getNumber() {

        return this.number;

    }

    public void setNumber(String number) {

        this.number = number;

    }

    @ManyToOne(fetch = FetchType.LAZY)

    @JoinColumn(name = "id_person")

    public Persons getPersons() {

        return this.persons;

    }

    public void setPersons(Persons persons) {

        this.persons = persons;

    }

}

Code:

package com.app.model;

import java.util.HashSet;

import java.util.Set;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.FetchType;

import javax.persistence.GeneratedValue;

import static javax.persistence.GenerationType.IDENTITY;

import javax.persistence.Id;

import javax.persistence.OneToMany;

import javax.persistence.Table;

@Entity

@Table(name = "persons", catalog = "test")

public class Persons implements java.io.Serializable {

    private static final long serialVersionUID = -3247756369663156186L;

    private Integer id;

    private String name;

    private Set<Phonenumbers> phonenumberses = new HashSet<Phonenumbers>(0);

    public Persons() {

    }

    public Persons(String name) {

        this.name = name;

    }

    public Persons(String name, Set<Phonenumbers> phonenumberses) {

        this.name = name;

        this.phonenumberses = phonenumberses;

    }

    @Id

    @GeneratedValue(strategy = IDENTITY)

    @Column(name = "id", unique = true, nullable = false)

    public Integer getId() {

        return this.id;

    }

    public void setId(Integer id) {

        this.id = id;

    }

    @Column(name = "name", nullable = false, length = 50)

    public String getName() {

        return this.name;

    }

    public void setName(String name) {

        this.name = name;

    }

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "persons")

    public Set<Phonenumbers> getPhonenumberses() {

        return this.phonenumberses;

    }

    public void setPhonenumberses(Set<Phonenumbers> phonenumberses) {

        this.phonenumberses = phonenumberses;

    }

}

Code:

package com.app.dao;

import javax.ejb.Stateless;

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

import javax.persistence.PersistenceContextType;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import com.app.model.Phonenumbers;

@Stateless

public class PhonenumbersHome {

    private static final Log log = LogFactory.getLog(PhonenumbersHome.class);

    @PersistenceContext(unitName="PhoneBook", type=PersistenceContextType.EXTENDED)

    private EntityManager entityManager;

    public void persist(Phonenumbers transientInstance) {

        log.debug("persisting Phonenumbers instance");

        try {

            entityManager.persist(transientInstance);

            log.debug("persist successful");

        } catch (RuntimeException re) {

            log.error("persist failed", re);

            throw re;

        }

    }

    public void remove(Phonenumbers persistentInstance) {

        log.debug("removing Phonenumbers instance");

        try {

            entityManager.remove(persistentInstance);

            log.debug("remove successful");

        } catch (RuntimeException re) {

            log.error("remove failed", re);

            throw re;

        }

    }

    public Phonenumbers merge(Phonenumbers detachedInstance) {

        log.debug("merging Phonenumbers instance");

        try {

            Phonenumbers result = entityManager.merge(detachedInstance);

            log.debug("merge successful");

            return result;

        } catch (RuntimeException re) {

            log.error("merge failed", re);

            throw re;

        }

    }

    public Phonenumbers findById(String id) {

        log.debug("getting Phonenumbers instance with id: " + id);

        try {

            Phonenumbers instance = entityManager.find(Phonenumbers.class, id);

            log.debug("get successful");

            return instance;

        } catch (RuntimeException re) {

            log.error("get failed", re);

            throw re;

        }

    }

}

Code:

package com.app.dao;

import javax.ejb.Stateless;

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

import javax.persistence.PersistenceContextType;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import com.app.model.Persons;

@Stateless

public class PersonsHome {

    private static final Log log = LogFactory.getLog(PersonsHome.class);

    @PersistenceContext(unitName="PhoneBook", type=PersistenceContextType.EXTENDED)

    private EntityManager entityManager;

    public void persist(Persons transientInstance) {

        log.debug("persisting Persons instance");

        try {

            entityManager.persist(transientInstance);

            log.debug("persist successful");

        } catch (RuntimeException re) {

            log.error("persist failed", re);

            throw re;

        }

    }

    public void remove(Persons persistentInstance) {

        log.debug("removing Persons instance");

        try {

            entityManager.remove(persistentInstance);

            log.debug("remove successful");

        } catch (RuntimeException re) {

            log.error("remove failed", re);

            throw re;

        }

    }

    public Persons merge(Persons detachedInstance) {

        log.debug("merging Persons instance");

        try {

            Persons result = entityManager.merge(detachedInstance);

            log.debug("merge successful");

            return result;

        } catch (RuntimeException re) {

            log.error("merge failed", re);

            throw re;

        }

    }

    public Persons findById(Integer id) {

        log.debug("getting Persons instance with id: " + id);

        try {

            Persons instance = entityManager.find(Persons.class, id);

            log.debug("get successful");

            return instance;

        } catch (RuntimeException re) {

            log.error("get failed", re);

            throw re;

        }

    }

}

Code:

package com.app.ws;

import javax.ejb.EJB;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.ws.rs.PathParam;

import javax.ws.rs.Produces;

import javax.ws.rs.GET;

import javax.ws.rs.Path;

import com.app.dao.PersonsHome;

import com.app.model.Persons;

@Path("/persons")

public class PersonsResources {

    @EJB

    private PersonsHome ph;

    @GET()

    @Produces("application/json")

    @Path("/{id}")

    public Persons getPerson(@PathParam("id") int id) {

        try{

            Context cx = new InitialContext();

            ph = (PersonsHome)cx.lookup("java:module/PersonsHome");

        }catch(Exception e){

            e.printStackTrace();

        }

        return ph.findById(id);

    }

}

and this is the persistence.xml

Code:

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

<persistence version="2.0"

xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

   <persistence-unit name="PhoneBook" transaction-type="JTA">

     <provider>org.hibernate.ejb.HibernatePersistence</provider>

     <jta-data-source>java:/test</jta-data-source> 

     <properties>

       <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />

       <property name="hibernate.hbm2ddl.auto" value="validate"/>

       <property name="hibernate.show_sql" value="true"/>

       <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>

     </properties>

  </persistence-unit>

</persistence>

on link:

[code]http://localhost:8080/PhoneBook/persons/1[code]

I aspect ad output like this:

Quote:

{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932"......[/quote]

but I've a cycle like this:

Quote:

Anyone can halp me?

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