Spring Boot Hibernate one to many. Lazy many not written to database - spring-boot

Question

I have two entities. Person (one) and Contactdetails (many).
Contactdetails are lazy loading. I have no problem with creating a new Person and get it written into the database. For my test I use the MySQL database installed locally filled up with dummy data. I run kind of integration test.
In my test code I use #Transactional annotation in order to stay inside one session where I fetch a Person, create a new Contacdetails, connect them together and then save the Person, which will cascade save the Contactdetails too. In theory...
Contactdetails is not written to the database. Interestingly, if I write to console all Contactdetails inside the #Transactional annotated test method, I see the new Contactdetails created. As soon es I leave this test method, this freshly created Contactdetails is no more visible.
My Entities are as follows:
Person:
package com.szivalaszlo.contracts.landon.data.entity;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;
import java.time.LocalDate;
import java.util.Objects;
#Entity
#Table(name="person")
public class Person {
private static Logger logger = LogManager.getLogger();
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#Column(name = "date_of_birth")
private LocalDate dateOfBirth;
#Column(name = "first_name_mother")
private String firstNameMother;
#Column(name = "last_name_mother")
private String lastNameMother;
#OneToMany(fetch=FetchType.LAZY, mappedBy = "person", cascade = CascadeType.ALL) // refers to person attribute of Contactdetails class
private List<Contactdetails> contactdetails;
#ManyToMany(fetch=FetchType.LAZY)
#JoinTable(name = "buyer_contract",
joinColumns = #JoinColumn(name = "person_buyerid"),
inverseJoinColumns = #JoinColumn(name = "contractid"))
List<Contract> buyerContracts;
#ManyToMany(fetch=FetchType.LAZY)
#JoinTable(name = "seller_contract",
joinColumns = #JoinColumn(name = "person_sellerid"),
inverseJoinColumns = #JoinColumn(name = "contractid"))
List<Contract> sellerContracts;
public Person(){
}
public Person(String firstName, String lastName, String dateOfBirth, String firstNameMother, String lastNameMother) {
this.firstName = firstName;
this.lastName = lastName;
this.dateOfBirth = LocalDate.parse(dateOfBirth);
this.firstNameMother = firstNameMother;
this.lastNameMother = lastNameMother;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public LocalDate getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(LocalDate dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public String getFirstNameMother() {
return firstNameMother;
}
public void setFirstNameMother(String firstNameMother) {
this.firstNameMother = firstNameMother;
}
public String getLastNameMother() {
return lastNameMother;
}
public void setLastNameMother(String lastNameMother) {
this.lastNameMother = lastNameMother;
}
public List<Contactdetails> getContactdetails() {
return contactdetails;
}
public void addContactdetail(Contactdetails contactdetail){
if(null == contactdetails){
contactdetails = new ArrayList<Contactdetails>();
}
contactdetails.add(contactdetail);
}
public String getStringForEqualsCheck(){
return firstName+lastName+dateOfBirth.toString()+firstNameMother+lastNameMother;
}
#Override
public boolean equals(Object obj) {
if (obj == null) return false;
if (!(obj instanceof Person))
return false;
if (obj == this)
return true;
return this.getStringForEqualsCheck().equals(((Person) obj).getStringForEqualsCheck());
}
#Override
public int hashCode() {
return Objects.hash(firstName, lastName, dateOfBirth, firstNameMother, lastNameMother);
}
#Override
public String toString() {
return "Person{" +
"id=" + id +
", firstName='" + firstName + '\'' +
", lastName='" + lastName + '\'' +
", dateOfBirth=" + dateOfBirth +
", firstNameMother='" + firstNameMother + '\'' +
", lastNameMother='" + lastNameMother + '\'' +
'}';
}
}
Contactdetails:
package com.szivalaszlo.contracts.landon.data.entity;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import javax.persistence.*;
import java.util.Objects;
#Entity
#Table(name="contactdetails")
public class Contactdetails {
private static Logger logger = LogManager.getLogger();
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "address")
private String address;
#Column(name = "email")
private String email;
#Column(name = "phone")
private String phone;
#ManyToOne
#JoinColumn(name = "personid", nullable = false)
private Person person;
public Contactdetails(){
}
public Contactdetails(String address, String email, String phone) {
this.address = address;
this.email = email;
this.phone = phone;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
logger.debug("Person is set for contactdetail: " + this.toString() + " person: " + this.person.toString());
}
public String getStringForEqualsCheck(){
return address+email+phone;
}
#Override
public boolean equals(Object obj) {
if (obj == null) return false;
if (!(obj instanceof Contactdetails))
return false;
if (obj == this)
return true;
return this.getStringForEqualsCheck().equals(((Contactdetails) obj).getStringForEqualsCheck());
}
#Override
public int hashCode() {
return Objects.hash(address, email, phone);
}
#Override
public String toString() {
return "Contactdetails{" +
"id=" + id +
", address='" + address + '\'' +
", email='" + email + '\'' +
", phone='" + phone + '\'' +
", person=" + person +
'}';
}
}
Service class:
package com.szivalaszlo.contracts.landon.business.domain;
import com.szivalaszlo.contracts.landon.data.entity.Contactdetails;
import com.szivalaszlo.contracts.landon.data.entity.Person;
import com.szivalaszlo.contracts.landon.data.repository.ContactdetailsRepository;
import com.szivalaszlo.contracts.landon.data.repository.PersonRepository;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.HashSet;
import java.util.List;
#Service
public class PersonService {
private static Logger logger = LogManager.getLogger();
private PersonRepository personRepository;
private ContactdetailsRepository contactdetailsRepository;
#Autowired
public PersonService(PersonRepository personRepository, ContactdetailsRepository contactdetailsRepository){
this.personRepository = personRepository;
this.contactdetailsRepository = contactdetailsRepository;
}
public int createPerson(String firstName, String lastName, String dateOfBirth, String firstNameMother, String lastNameMother){
Person person = new Person(firstName, lastName, dateOfBirth, firstNameMother, lastNameMother);
if(personAlreadyExistsInDb(person)){
logger.debug("Same person already found in Db. Person: " + person.toString());
return -1;
}else{
personRepository.save(person);
return person.getId();
}
}
private boolean personAlreadyExistsInDb(Person person){
HashSet<Person> allPersonFromDb = personRepository.findAll();
if (allPersonFromDb.contains(person)){
return true;
}else{
return false;
}
}
public void createContactdetailsForPerson(Person person, String address, String email, String phone){
Contactdetails contactdetails = new Contactdetails(address, email, phone);
if(contactdetailsAlreadyExistForPerson(contactdetails, person)){
logger.debug("Same contactdetail for person already found " + person.toString() + " " + contactdetails.toString());
} else{
contactdetails.setPerson(person);
person.addContactdetail(contactdetails);
contactdetailsRepository.save(contactdetails);
personRepository.save(person);
}
}
private boolean contactdetailsAlreadyExistForPerson(Contactdetails contactdetails, Person person){
List<Contactdetails> allContactdetailsForPersonFromDb = person.getContactdetails();
if(null == allContactdetailsForPersonFromDb || allContactdetailsForPersonFromDb.size() == 0){
return false;
}
if(!allContactdetailsForPersonFromDb.contains(contactdetails)){
return false;
}
return true;
}
}
Test class:
package com.szivalaszlo.contracts;
import com.szivalaszlo.contracts.landon.business.domain.PersonService;
import com.szivalaszlo.contracts.landon.data.entity.Contactdetails;
import com.szivalaszlo.contracts.landon.data.entity.Person;
import com.szivalaszlo.contracts.landon.data.repository.ContactdetailsRepository;
import com.szivalaszlo.contracts.landon.data.repository.PersonRepository;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
import java.util.Random;
#RunWith(SpringRunner.class)
#SpringBootTest(webEnvironment= SpringBootTest.WebEnvironment.RANDOM_PORT)
public class PersonServiceTest_ {
private static Logger logger = LogManager.getLogger();
#Autowired
private PersonRepository personRepository;
#Autowired
private ContactdetailsRepository contactdetailsRepository;
Random rand = new Random();
int randomNumber = rand.nextInt(899)+100;
private String address = "test address street 1 in City "+randomNumber;
private String email = "testemail#exmaple.com " +randomNumber;
private String phone = "[phone] " +randomNumber;
#Test
#Transactional(propagation = Propagation.REQUIRED)
public void it_should_save_contactdetail_to_person(){
PersonService testPersonService = new PersonService(personRepository, contactdetailsRepository);
Person testPerson = personRepository.findById(179); //I have an id# 179 Person in the database fully detailed.
testPersonService.createContactdetailsForPerson(testPerson, address, email, phone);
List<Contactdetails> allStoredContactdetailsinDB = contactdetailsRepository.findAll();
allStoredContactdetailsinDB.forEach(item->System.out.println(item));
}
}
The test runs with no error. I see the following output in the console:
Bradlystad, ND 98886-5789', email='maverick85#example.com', phone='464-812-3618', person=Person{id=98, firstName='Eldridge', lastName='Reichel', dateOfBirth=1981-08-07, firstNameMother='Brianne', lastNameMother='Ryan'}}
Contactdetails{id=99, address='569 Langosh Turnpike Suite 235
East Archibald, FL 43208-3081', email='spouros#example.org', phone='08976297815', person=Person{id=99, firstName='Myrtie', lastName='Graham', dateOfBirth=1982-01-19, firstNameMother='Libby', lastNameMother='Veum'}}
Contactdetails{id=100, address='010 Pfeffer Islands
Kiehnside, FL 25044-1157', email='paucek.grover#example.com', phone='1-157-850-0688x390', person=Person{id=100, firstName='Katheryn', lastName='Hoppe', dateOfBirth=2009-06-22, firstNameMother='Virginie', lastNameMother='Donnelly'}}
Contactdetails{id=106, address='test address street 1 in City 623', email='testemail#exmaple.com 623', phone='[phone]', person=Person{id=179, firstName='TestJhonFirst808', lastName='TestSmithLast808', dateOfBirth=1990-11-11, firstNameMother='TestJackieMotherFirst808', lastNameMother='TestSmithMotherLast808'}}
The interesting part is the last line which shows, that the Contactdetails is created in the db with id#106.
When I query the database after the test is run, I don't see the new line in the table.

Answer 1

By default, test transactions will be automatically rolled back after
completion of the test; however, transactional commit and rollback
behavior can be configured declaratively via the #Commit and #Rollback
annotations
Add the following annotation to your test:
#Rollback(false)