BAEL-1713: Pessimistic Locking in JPA

Tests for the article.

hibernate5/src/main/java/com/baeldung/hibernate/HibernateUtil.java

@@ -1,30 +1,12 @@
 package com.baeldung.hibernate;
 
-import com.baeldung.hibernate.pojo.Employee;
-import com.baeldung.hibernate.pojo.EntityDescription;
-import com.baeldung.hibernate.pojo.OrderEntry;
-import com.baeldung.hibernate.pojo.OrderEntryIdClass;
-import com.baeldung.hibernate.pojo.OrderEntryPK;
-import com.baeldung.hibernate.pojo.PointEntity;
-import com.baeldung.hibernate.pojo.PolygonEntity;
-import com.baeldung.hibernate.pojo.Product;
-import com.baeldung.hibernate.pojo.Phone;
-import com.baeldung.hibernate.pojo.TemporalValues;
-import com.baeldung.hibernate.pojo.Course;
-import com.baeldung.hibernate.pojo.Student;
-import com.baeldung.hibernate.pojo.User;
-import com.baeldung.hibernate.pojo.UserProfile;
-import com.baeldung.hibernate.pojo.inheritance.Animal;
-import com.baeldung.hibernate.pojo.inheritance.Bag;
-import com.baeldung.hibernate.pojo.inheritance.Book;
-import com.baeldung.hibernate.pojo.inheritance.Car;
-import com.baeldung.hibernate.pojo.inheritance.MyEmployee;
-import com.baeldung.hibernate.pojo.inheritance.MyProduct;
-import com.baeldung.hibernate.pojo.inheritance.Pen;
-import com.baeldung.hibernate.pojo.inheritance.Person;
-import com.baeldung.hibernate.pojo.inheritance.Pet;
-import com.baeldung.hibernate.pojo.inheritance.Vehicle;
-
+import com.baeldung.hibernate.pessimisticlocking.Individual;
+import com.baeldung.hibernate.pessimisticlocking.PessimisticLockingCourse;
+import com.baeldung.hibernate.pessimisticlocking.PessimisticLockingEmployee;
+import com.baeldung.hibernate.pessimisticlocking.PessimisticLockingStudent;
+import com.baeldung.hibernate.pojo.*;
+import com.baeldung.hibernate.pojo.Person;
+import com.baeldung.hibernate.pojo.inheritance.*;
 import org.apache.commons.lang3.StringUtils;
 import org.hibernate.SessionFactory;
 import org.hibernate.boot.Metadata;
@@ -82,6 +64,12 @@ public class HibernateUtil {
         metadataSources.addAnnotatedClass(PointEntity.class);
         metadataSources.addAnnotatedClass(PolygonEntity.class);
         metadataSources.addAnnotatedClass(com.baeldung.hibernate.pojo.Person.class);
+        metadataSources.addAnnotatedClass(Individual.class);
+        metadataSources.addAnnotatedClass(PessimisticLockingEmployee.class);
+        metadataSources.addAnnotatedClass(PessimisticLockingStudent.class);
+        metadataSources.addAnnotatedClass(PessimisticLockingCourse.class);
+        metadataSources.addAnnotatedClass(com.baeldung.hibernate.pessimisticlocking.Customer.class);
+        metadataSources.addAnnotatedClass(com.baeldung.hibernate.pessimisticlocking.Address.class);
 
         Metadata metadata = metadataSources.buildMetadata();
         return metadata.getSessionFactoryBuilder()

hibernate5/src/main/java/com/baeldung/hibernate/pessimisticlocking/Address.java

@@ -0,0 +1,34 @@
+package com.baeldung.hibernate.pessimisticlocking;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class Address {
+
+    private String country;
+    private String city;
+
+    public Address(String country, String city) {
+        this.country = country;
+        this.city = city;
+    }
+
+    public Address() {
+    }
+
+    public String getCountry() {
+        return country;
+    }
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pessimisticlocking/Customer.java

@@ -0,0 +1,58 @@
+package com.baeldung.hibernate.pessimisticlocking;
+
+import javax.persistence.*;
+import java.util.List;
+
+@Entity
+public class Customer {
+
+    @Id
+    private Long customerId;
+    private String name;
+    private String lastName;
+    @ElementCollection
+    @CollectionTable(name = "customer_address")
+    private List<Address> addressList;
+
+    public Customer() {
+    }
+
+    public Customer(Long customerId, String name, String lastName, List<Address> addressList) {
+        this.customerId = customerId;
+        this.name = name;
+        this.lastName = lastName;
+        this.addressList = addressList;
+    }
+
+    public Long getCustomerId() {
+        return customerId;
+    }
+
+    public void setCustomerId(Long customerId) {
+        this.customerId = customerId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public List<Address> getAddressList() {
+        return addressList;
+    }
+
+    public void setAddressList(List<Address> addressList) {
+        this.addressList = addressList;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pessimisticlocking/Individual.java

@@ -0,0 +1,49 @@
+package com.baeldung.hibernate.pessimisticlocking;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Inheritance;
+import javax.persistence.InheritanceType;
+
+@Entity
+@Inheritance(strategy = InheritanceType.JOINED)
+public class Individual {
+
+    @Id
+    private Long id;
+    private String name;
+    private String lastName;
+
+    public Individual(Long id, String name, String lastName) {
+        this.id = id;
+        this.name = name;
+        this.lastName = lastName;
+    }
+
+    public Individual() {
+    }
+
+    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 getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pessimisticlocking/PessimisticLockingCourse.java

@@ -0,0 +1,47 @@
+package com.baeldung.hibernate.pessimisticlocking;
+
+import javax.persistence.*;
+
+@Entity
+public class PessimisticLockingCourse {
+
+    @Id
+    private Long courseId;
+    private String name;
+    @ManyToOne
+    @JoinTable(name = "student_course")
+    private PessimisticLockingStudent student;
+
+    public PessimisticLockingCourse(Long courseId, String name, PessimisticLockingStudent student) {
+        this.courseId = courseId;
+        this.name = name;
+        this.student = student;
+    }
+
+    public PessimisticLockingCourse() {
+    }
+
+    public Long getCourseId() {
+        return courseId;
+    }
+
+    public void setCourseId(Long courseId) {
+        this.courseId = courseId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public PessimisticLockingStudent getStudent() {
+        return student;
+    }
+
+    public void setStudent(PessimisticLockingStudent students) {
+        this.student = students;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pessimisticlocking/PessimisticLockingEmployee.java

@@ -0,0 +1,27 @@
+package com.baeldung.hibernate.pessimisticlocking;
+
+import javax.persistence.Entity;
+import java.math.BigDecimal;
+
+@Entity
+public class PessimisticLockingEmployee extends Individual {
+
+    private BigDecimal salary;
+
+    public PessimisticLockingEmployee(Long id, String name, String lastName, BigDecimal salary) {
+        super(id, name, lastName);
+        this.salary = salary;
+    }
+
+    public PessimisticLockingEmployee() {
+        super();
+    }
+
+    public BigDecimal getSalary() {
+        return salary;
+    }
+
+    public void setSalary(BigDecimal average) {
+        this.salary = average;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pessimisticlocking/PessimisticLockingStudent.java

@@ -0,0 +1,46 @@
+package com.baeldung.hibernate.pessimisticlocking;
+
+import javax.persistence.*;
+import java.util.List;
+
+@Entity
+public class PessimisticLockingStudent {
+
+    @Id
+    private Long id;
+    private String name;
+    @OneToMany(mappedBy = "student")
+    private List<PessimisticLockingCourse> courses;
+
+    public PessimisticLockingStudent(Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public PessimisticLockingStudent() {
+    }
+
+    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 List<PessimisticLockingCourse> getCourses() {
+        return courses;
+    }
+
+    public void setCourses(List<PessimisticLockingCourse> courses) {
+        this.courses = courses;
+    }
+}