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 Post subject: Hibernate Rest with Neo4j: TransactionNotFound
PostPosted: Tue Oct 03, 2017 11:17 am 
Newbie

Joined: Tue Oct 03, 2017 11:08 am
Posts: 2
I am trying to save an entity to the database. When I send the post request, I get status:200 ok but the entity is not saved to the database.
Here is the Person class:
Code:
package com.Neo4jRestAPI;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="Person")
public class Person {
   
   @Id
   @GeneratedValue(strategy = GenerationType.AUTO)
   @Column(name = "id")
   private Integer id;
   
   @Column(name="gender")
   private String gender;
   
   @Column(name="dob")
   private String dob;
   
   @Column(name="firstname")
   private String firstname;
   
   @Column(name="middlename")
   private String middlename;
   
   @Column(name="lastname")
   private String lastname;

   private String relationship_type;
   
   private String relationship;
   
   public Person() {}
   
   // getters and setters
   public Integer getId() {
      return id;
   }

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

   public String getGender() {
      return gender;
   }

   public String setGender(String gender) {
      return this.gender = gender;
   }

   public String getDob() {
      return dob;
   }

   public String setDob(String dob) {
      return this.dob = dob;
   }

   public String getFirstname() {
      return firstname;
   }

   public String setFirstname(String firstname) {
      return this.firstname = firstname;
   }

   public String getMiddlename() {
      return middlename;
   }

   public String setMiddlename(String middlename) {
      return this.middlename = middlename;
   }

   public String getLastname() {
      return lastname;
   }

   public String setLastname(String lastname) {
      return this.lastname = lastname;
   }
   
   public String getRelationship_type() {
      return relationship_type;
   }

   public String setRelationship_type(String relationship_type) {
      return this.relationship_type = relationship_type;
   }
   
   public String getRelationship() {
      return relationship;
   }

   public String setRelationship(String relationship) {
      return this.relationship = relationship;
   }
}


here is the PersonDAO class:
Code:
import org.hibernate.HibernateException;

import com.google.gson.Gson;

public class PersonDAO {

    public void addPerson(Person person){

        try {
            EntityManagerFactory emf = Persistence.createEntityManagerFactory("persistence");
            EntityManager em = emf.createEntityManager();
            EntityTransaction tx = em.getTransaction();
            tx.begin();

            em.persist(person);
            em.flush();     
            tx.commit();
            em.clear();
            em.close();
            emf.close();
            }
        catch ( Exception e ) {
            e.printStackTrace();
        }
    }
}


and here is how I try to send the data:
Code:
@POST
@Path("/person")
@Consumes("application/json")
public Response addPerson(Person person){

     PersonDAO dao = new PersonDAO();

     dao.addPerson(person);

     return Response.ok().build();
}


The stack trace does not show any errors, however, when I use log4j, I get the following error:
Code:
"Neo.ClientError.Transaction.TransactionNotFound","message":"Unrecognized transaction id. Transaction may have timed out and been rolled back


When I remove the
Code:
@GeneratedValue
and specify the id in the json, then the entity is saved. When I try to auto generate the id, then the entity is not saved but the id is generated.
Does anyone know what is causing this behavior?


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 Post subject: Re: Hibernate Rest with Neo4j: TransactionNotFound
PostPosted: Wed Oct 04, 2017 8:32 am 
Newbie

Joined: Tue Oct 03, 2017 11:08 am
Posts: 2
I was able to fix the issue by changing from tomcat to wildfly 9. I am not sure why tomcat was the issue though. It could be a bug but I am not sure. If someone has an explanation I would like to hear it :)


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