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[BAEL-4958] JPA Unique Constraint (#10793) 

* [BAEL-4958] JPA Unique Constraint

Defining Unique Constraints in JPA

* [BAEL-4958] JPA Unique Constraint

Changed the field name from pAddress to streetAddress

* [BAEL-4958] JPA Unique Constraint

Resolved conflicts

* [BAEL-4958] JPA Unique Constraint

Getters and setters are changed for address field

* [BAEL-4958] JPA Unique Constraint

Fixed Junits

* [BAEL-4958] JPA Unique Constraint

Fixed id field

Co-authored-by: MeenaGawande <MeenaGawande@users.noreply.github.com>
This commit is contained in:
MeenaGawande 2021-06-02 08:22:34 +05:30 committed by GitHub
parent 69f4ccd5f4
commit 559d47a612
5 changed files with 404 additions and 0 deletions
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37
persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/uniqueconstraints/Address.java Normal file
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@ -0,0 +1,37 @@
package com.baeldung.jpa.uniqueconstraints;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table
public class Address implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue
private Long id;
private String streetAddress;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getStreetAddress() {
return streetAddress;
}
public void setStreetAddress(String streetAddress) {
this.streetAddress = streetAddress;
}
}

116
persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/uniqueconstraints/Person.java Normal file
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package com.baeldung.jpa.uniqueconstraints;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
@Entity
@Table(uniqueConstraints = { @UniqueConstraint(name = "UniqueNumberAndStatus", columnNames = { "personNumber", "isActive" }),
@UniqueConstraint(name = "UniqueSecurityAndDepartment", columnNames = { "securityNumber", "departmentCode" }),
@UniqueConstraint(name = "UniqueNumberAndAddress", columnNames = { "personNumber", "address" }) })
public class Person implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue
private Long id;
private String name;
private String password;
@Column(unique = true)
private String email;
@Column(unique = true)
private Long personNumber;
private Boolean isActive;
private String securityNumber;
private String departmentCode;
@Column(unique = true)
@JoinColumn(name = "addressId", referencedColumnName = "id")
private Address address;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Long getPersonNumber() {
return personNumber;
}
public void setPersonNumber(Long personNumber) {
this.personNumber = personNumber;
}
public Boolean getIsActive() {
return isActive;
}
public void setIsActive(Boolean isActive) {
this.isActive = isActive;
}
public String getScode() {
return securityNumber;
}
public void setScode(String scode) {
this.securityNumber = scode;
}
public String getDcode() {
return departmentCode;
}
public void setDcode(String dcode) {
this.departmentCode = dcode;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
}

16
persistence-modules/java-jpa-3/src/main/resources/META-INF/persistence.xml
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@ -113,6 +113,22 @@
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/>
</properties>
</persistence-unit>
<persistence-unit name="jpa-unique-constraints">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.uniqueconstraints.Person</class>
<class>com.baeldung.jpa.uniqueconstraints.Address</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
<property name="javax.persistence.jdbc.user" value="sa" />
<property name="javax.persistence.jdbc.password" value="" />
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
<property name="show_sql" value="true" />
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false" />
</properties>
</persistence-unit>
<persistence-unit name="jpa-h2-return-multiple-entities">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.returnmultipleentities.Channel</class>

119
persistence-modules/java-jpa-3/src/test/java/com/baeldung/jpa/uniqueconstraints/UniqueColumnIntegrationTest.java Normal file
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package com.baeldung.jpa.uniqueconstraints;
import java.util.Optional;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.hibernate.exception.ConstraintViolationException;
import org.junit.Assert;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
public class UniqueColumnIntegrationTest {
private static EntityManagerFactory factory;
private static EntityManager entityManager;
@BeforeAll
public static void setup() {
factory = Persistence.createEntityManagerFactory("jpa-unique-constraints");
entityManager = factory.createEntityManager();
}
@Test
public void whenPersistPersonWithSameNumber_thenConstraintViolationException() {
Person person1 = new Person();
person1.setPersonNumber(2000L);
person1.setEmail("john.beth@gmail.com");
Person person2 = new Person();
person2.setPersonNumber(2000L);
person2.setEmail("anthony.green@gmail.com");
entityManager.getTransaction().begin();
entityManager.persist(person1);
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
try {
entityManager.persist(person2);
entityManager.getTransaction().commit();
Assert.fail("Should raise an exception - unique key violation");
} catch (Exception ex) {
Assert.assertTrue(Optional.of(ex)
.map(Throwable::getCause)
.map(Throwable::getCause)
.filter(x -> x instanceof ConstraintViolationException)
.isPresent());
} finally {
entityManager.getTransaction().rollback();
}
}
@Test
public void whenPersistPersonWithSameEmail_thenConstraintViolationException() {
Person person1 = new Person();
person1.setPersonNumber(4000L);
person1.setEmail("timm.beth@gmail.com");
Person person2 = new Person();
person2.setPersonNumber(3000L);
person2.setEmail("timm.beth@gmail.com");
entityManager.getTransaction().begin();
entityManager.persist(person1);
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
try {
entityManager.persist(person2);
entityManager.getTransaction().commit();
Assert.fail("Should raise an exception - unique key violation");
} catch (Exception ex) {
Assert.assertTrue(Optional.of(ex)
.map(Throwable::getCause)
.map(Throwable::getCause)
.filter(x -> x instanceof ConstraintViolationException)
.isPresent());
} finally {
entityManager.getTransaction().rollback();
}
}
@Test
public void whenPersistPersonWithSameAddress_thenConstraintViolationException() {
Person person1 = new Person();
person1.setPersonNumber(5000L);
person1.setEmail("chris.beck@gmail.com");
Address address1 = new Address();
address1.setStreetAddress("20 Street");
person1.setAddress(address1);
Person person2 = new Person();
person2.setPersonNumber(6000L);
person2.setEmail("mark.jonson@gmail.com");
person2.setAddress(address1);
entityManager.getTransaction().begin();
entityManager.persist(person1);
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
try {
entityManager.persist(person2);
entityManager.getTransaction().commit();
Assert.fail("Should raise an exception - unique key violation");
} catch (Exception ex) {
Assert.assertTrue(Optional.of(ex)
.map(Throwable::getCause)
.map(Throwable::getCause)
.filter(x -> x instanceof ConstraintViolationException)
.isPresent());
} finally {
entityManager.getTransaction().rollback();
}
}
}

116
persistence-modules/java-jpa-3/src/test/java/com/baeldung/jpa/uniqueconstraints/UniqueConstraintIntegrationTest.java Normal file
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package com.baeldung.jpa.uniqueconstraints;
import java.util.Optional;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.hibernate.exception.ConstraintViolationException;
import org.junit.Assert;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
public class UniqueConstraintIntegrationTest {
private static EntityManagerFactory factory;
private static EntityManager entityManager;
@BeforeAll
public static void setup() {
factory = Persistence.createEntityManagerFactory("jpa-unique-constraints");
entityManager = factory.createEntityManager();
}
@Test
public void whenPersistPersonWithSameNumberAndStatus_thenConstraintViolationException() {
Person person1 = new Person();
person1.setPersonNumber(12345L);
person1.setIsActive(Boolean.TRUE);
Person person2 = new Person();
person2.setPersonNumber(12345L);
person2.setIsActive(Boolean.TRUE);
entityManager.getTransaction().begin();
entityManager.persist(person1);
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
try {
entityManager.persist(person2);
entityManager.getTransaction().commit();
Assert.fail("Should raise an exception - unique key violation");
} catch (Exception ex) {
Assert.assertTrue(Optional.of(ex)
.map(Throwable::getCause)
.map(Throwable::getCause)
.filter(x -> x instanceof ConstraintViolationException)
.isPresent());
} finally {
entityManager.getTransaction().rollback();
}
}
@Test
public void whenPersistPersonWithSameSCodeAndDecode_thenConstraintViolationException() {
Person person1 = new Person();
person1.setDcode("Sec1");
person1.setScode("Axybg356");
Person person2 = new Person();
person2.setDcode("Sec1");
person2.setScode("Axybg356");
entityManager.getTransaction().begin();
entityManager.persist(person1);
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
try {
entityManager.persist(person2);
entityManager.getTransaction().commit();
Assert.fail("Should raise an exception - unique key violation");
} catch (Exception ex) {
Assert.assertTrue(Optional.of(ex)
.map(Throwable::getCause)
.map(Throwable::getCause)
.filter(x -> x instanceof ConstraintViolationException)
.isPresent());
} finally {
entityManager.getTransaction().rollback();
}
}
@Test
public void whenPersistPersonWithSameNumberAndAddress_thenConstraintViolationException() {
Address address1 = new Address();
address1.setStreetAddress("40 Street");
Person person1 = new Person();
person1.setPersonNumber(54321L);
person1.setAddress(address1);
Person person2 = new Person();
person2.setPersonNumber(99999L);
person2.setAddress(address1);
entityManager.getTransaction().begin();
entityManager.persist(person1);
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
try {
entityManager.persist(person2);
entityManager.getTransaction().commit();
Assert.fail("Should raise an exception - unique key violation");
} catch (Exception ex) {
Assert.assertTrue(Optional.of(ex)
.map(Throwable::getCause)
.map(Throwable::getCause)
.filter(x -> x instanceof ConstraintViolationException)
.isPresent());
} finally {
entityManager.getTransaction().rollback();
}
}
}