BAEL-5431 BootstrapMode for JPA Repositories

2022-03-23 17:55:49 +01:00
parent a74cb5c13e
commit 2c4bffbe3b
6 changed files with 169 additions and 0 deletions
@@ -0,0 +1,50 @@
+package com.baeldung.boot.bootstrapmode;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
+
+import javax.sql.DataSource;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.core.task.AsyncTaskExecutor;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Bean
+    AsyncTaskExecutor delayedTaskExecutor() {
+        return new ThreadPoolTaskExecutor() {
+            @Override
+            public <T> Future<T> submit(Callable<T> task) {
+                return super.submit(() -> {
+                    Thread.sleep(5000);
+                    return task.call();
+                });
+            }
+        };
+    }
+
+    @Bean
+    LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, AsyncTaskExecutor delayedTaskExecutor) {
+        LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
+        factory.setPackagesToScan("com.baeldung.boot.bootstrapmode");
+        factory.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
+        factory.setDataSource(dataSource);
+        factory.setBootstrapExecutor(delayedTaskExecutor);
+        Map<String, Object> properties = new HashMap<>();
+        properties.put("hibernate.hbm2ddl.auto", "create-drop");
+        factory.setJpaPropertyMap(properties);
+        return factory;
+    }
+}
+
@@ -0,0 +1,37 @@
+package com.baeldung.boot.bootstrapmode.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Todo {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String label;
+
+    public Todo() {
+    }
+
+    public Todo(String label) {
+        this.label = label;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+
+    public void setLabel(String label) {
+        this.label = label;
+    }
+}
@@ -0,0 +1,8 @@
+package com.baeldung.boot.bootstrapmode.repository;
+
+import org.springframework.data.repository.CrudRepository;
+
+import com.baeldung.boot.bootstrapmode.domain.Todo;
+
+public interface TodoRepository extends CrudRepository<Todo, Long> {
+}