[BAEL-2718] - Spring JPA Batch Inserts (#6333)

* [BAEL-2718] - Spring JPA Batch Inserts

* [BAEL-2718] - Spring JPA Batch Inserts (New PR)

* [BAEL-2718] - Spring JPA Batch Inserts New PR

* [BAEL-2718] - Spring JPA Batch Inserts

* BAEL-2718 - formatting (tab to space)

persistence-modules/spring-data-jpa/pom.xml

@@ -53,6 +53,15 @@
             <artifactId>spring-security-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+        <groupId>org.springframework.boot</groupId>
+           <artifactId>spring-boot-starter-test</artifactId>
+           <scope>test</scope>
+        </dependency>
 
         <dependency>
             <groupId>com.google.guava</groupId>

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/batchinserts/CustomerController.java

@@ -0,0 +1,43 @@
+package com.baeldung.batchinserts;
+
+import java.net.URISyntaxException;
+import java.util.Arrays;
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.batchinserts.model.Customer;
+import com.baeldung.batchinserts.repository.CustomerRepository;
+
+/**
+ * A simple controller to test the JPA CrudRepository operations
+ * controllers
+ * 
+ * @author ysharma2512
+ *
+ */
+@RestController
+public class CustomerController {
+
+    @Autowired
+    CustomerRepository customerRepository;
+
+    public CustomerController(CustomerRepository customerRepository2) {
+        this.customerRepository = customerRepository2;
+    }
+
+    @PostMapping("/customers")
+    public ResponseEntity<List<Customer>> insertCustomers() throws URISyntaxException {
+        Customer c1 = new Customer("James", "Gosling");
+        Customer c2 = new Customer("Doug", "Lea");
+        Customer c3 = new Customer("Martin", "Fowler");
+        Customer c4 = new Customer("Brian", "Goetz");
+        List<Customer> customers = Arrays.asList(c1, c2, c3, c4);
+        customerRepository.saveAll(customers);
+        return ResponseEntity.ok(customers);
+    }
+
+}

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/batchinserts/model/Customer.java

@@ -0,0 +1,56 @@
+package com.baeldung.batchinserts.model;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+/**
+ * Customer Entity class
+ * @author ysharma2512
+ *
+ */
+@Entity
+public class Customer {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String firstName;
+    private String lastName;
+
+    public Customer(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long 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;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Customer[id=%d, firstName='%s', lastName='%s']", id, firstName, lastName);
+    }
+
+}

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/batchinserts/repository/CustomerRepository.java

@@ -0,0 +1,15 @@
+package com.baeldung.batchinserts.repository;
+
+import org.springframework.data.repository.CrudRepository;
+
+import com.baeldung.batchinserts.model.Customer;
+
+/**
+ * JPA CrudRepository interface
+ * 
+ * @author ysharma2512
+ *
+ */
+public interface CustomerRepository extends CrudRepository<Customer, Long>{
+
+}

persistence-modules/spring-data-jpa/src/main/resources/application.properties

@@ -14,4 +14,9 @@ hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFa
 
 spring.datasource.data=import_entities.sql
 
-spring.main.allow-bean-definition-overriding=true
+spring.main.allow-bean-definition-overriding=true
+
+spring.jpa.properties.hibernate.jdbc.batch_size=4
+spring.jpa.properties.hibernate.order_inserts=true
+spring.jpa.properties.hibernate.order_updates=true
+spring.jpa.properties.hibernate.generate_statistics=true

persistence-modules/spring-data-jpa/src/test/java/com/baeldung/batchinserts/BatchInsertIntegrationTest.java

@@ -0,0 +1,44 @@
+package com.baeldung.batchinserts;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+import com.baeldung.batchinserts.CustomerController;
+import com.baeldung.batchinserts.repository.CustomerRepository;
+import com.baeldung.config.PersistenceConfiguration;
+import com.baeldung.config.PersistenceProductConfiguration;
+import com.baeldung.config.PersistenceUserConfiguration;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+@ContextConfiguration(classes = { PersistenceConfiguration.class, PersistenceProductConfiguration.class, PersistenceUserConfiguration.class })
+public class BatchInsertIntegrationTest {
+
+    @Autowired
+    private CustomerRepository customerRepository;
+    private MockMvc mockMvc;
+    @Before
+    public void setUp() throws Exception {
+        mockMvc = MockMvcBuilders.standaloneSetup( new CustomerController(customerRepository))
+            .build();
+    }
+
+    @Test
+    public void whenInsertingCustomers_thenCustomersAreCreated() throws Exception {
+        this.mockMvc.perform(post("/customers"))
+            .andExpect(status().isOk());
+    }    
+   
+}