[BAEL-12800] - Added auto config classes for DataSource

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/multipledb/MultipleDataSourceConfiguration.java

@@ -1,33 +0,0 @@
-package com.baeldung.multipledb;
-
-import javax.sql.DataSource;
-
-import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.boot.jdbc.DataSourceBuilder;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.PropertySource;
-
-/**
- * By default, the persistence-multiple-db.properties file is read for productDataSource() and userDataSource() 
- * in PersistenceProductConfiguration and PersistenceUserConfiguration respectively. 
- * <p>
- * If we need to use persistence-multiple-db-boot.properties then uncomment the below @Configuration class and comment out
- * productDataSource() and userDataSource() in PersistenceProductConfiguration and PersistenceUserConfiguration. 
- */
-//@Configuration
-@PropertySource({"classpath:persistence-multiple-db-boot.properties"})
-public class MultipleDataSourceConfiguration {
-    
-    @Bean
-    @ConfigurationProperties(prefix="spring.user")
-    public DataSource userDataSource() {
-        return DataSourceBuilder.create().build();
-    }
-    
-    @Bean
-    @ConfigurationProperties(prefix="spring.product")
-    public DataSource productDataSource() {
-        return DataSourceBuilder.create().build();
-    }
-}

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/multipledb/PersistenceProductAutoConfiguration.java

@@ -0,0 +1,71 @@
+package com.baeldung.multipledb;
+
+import java.util.HashMap;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.transaction.PlatformTransactionManager;
+
+/**
+ * By default, the persistence-multiple-db.properties file is read for 
+ * non auto configuration in PersistenceProductConfiguration. 
+ * <p>
+ * If we need to use persistence-multiple-db-boot.properties and auto configuration 
+ * then uncomment the below @Configuration class and comment out PersistenceProductConfiguration. 
+ */
+//@Configuration
+@PropertySource({"classpath:persistence-multiple-db-boot.properties"})
+@EnableJpaRepositories(basePackages = "com.baeldung.multipledb.dao.product", entityManagerFactoryRef = "productEntityManager", transactionManagerRef = "productTransactionManager")
+@Profile("!tc")
+public class PersistenceProductAutoConfiguration {
+    @Autowired
+    private Environment env;
+
+    public PersistenceProductAutoConfiguration() {
+        super();
+    }
+
+    //
+
+    @Bean
+    public LocalContainerEntityManagerFactoryBean productEntityManager() {
+        final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
+        em.setDataSource(productDataSource());
+        em.setPackagesToScan("com.baeldung.multipledb.model.product");
+
+        final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
+        em.setJpaVendorAdapter(vendorAdapter);
+        final HashMap<String, Object> properties = new HashMap<String, Object>();
+        properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
+        properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
+        em.setJpaPropertyMap(properties);
+
+        return em;
+    }
+
+    @Bean
+    @ConfigurationProperties(prefix="spring.product")
+    public DataSource productDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+    @Bean
+    public PlatformTransactionManager productTransactionManager() {
+        final JpaTransactionManager transactionManager = new JpaTransactionManager();
+        transactionManager.setEntityManagerFactory(productEntityManager().getObject());
+        return transactionManager;
+    }
+
+}

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/multipledb/PersistenceProductConfiguration.java

@@ -2,7 +2,6 @@ package com.baeldung.multipledb;
 
 import com.google.common.base.Preconditions;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Profile;
@@ -25,10 +24,6 @@ import java.util.HashMap;
 public class PersistenceProductConfiguration {
     @Autowired
     private Environment env;
-    
-    @Autowired
-    @Qualifier("productDataSource")
-    private DataSource productDataSource;
 
     public PersistenceProductConfiguration() {
         super();
@@ -39,7 +34,7 @@ public class PersistenceProductConfiguration {
     @Bean
     public LocalContainerEntityManagerFactoryBean productEntityManager() {
         final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
-        em.setDataSource(productDataSource);
+        em.setDataSource(productDataSource());
         em.setPackagesToScan("com.baeldung.multipledb.model.product");
 
         final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/multipledb/PersistenceUserAutoConfiguration.java

@@ -0,0 +1,76 @@
+package com.baeldung.multipledb;
+
+import java.util.HashMap;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.context.annotation.Profile;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.transaction.PlatformTransactionManager;
+
+/**
+ * By default, the persistence-multiple-db.properties file is read for 
+ * non auto configuration in PersistenceUserConfiguration. 
+ * <p>
+ * If we need to use persistence-multiple-db-boot.properties and auto configuration 
+ * then uncomment the below @Configuration class and comment out PersistenceUserConfiguration. 
+ */
+//@Configuration
+@PropertySource({"classpath:persistence-multiple-db-boot.properties"})
+@EnableJpaRepositories(basePackages = "com.baeldung.multipledb.dao.user", entityManagerFactoryRef = "userEntityManager", transactionManagerRef = "userTransactionManager")
+@Profile("!tc")
+public class PersistenceUserAutoConfiguration {
+    @Autowired
+    private Environment env;
+
+    public PersistenceUserAutoConfiguration() {
+        super();
+    }
+
+    //
+
+    @Primary
+    @Bean
+    public LocalContainerEntityManagerFactoryBean userEntityManager() {
+        System.out.println("loading config");
+        final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
+        em.setDataSource(userDataSource());
+        em.setPackagesToScan("com.baeldung.multipledb.model.user");
+
+        final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
+        em.setJpaVendorAdapter(vendorAdapter);
+        final HashMap<String, Object> properties = new HashMap<String, Object>();
+        properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
+        properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
+        em.setJpaPropertyMap(properties);
+
+        return em;
+    }
+
+    @Primary
+    @Bean
+    @ConfigurationProperties(prefix="spring.user")
+    public DataSource userDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+    @Primary
+    @Bean
+    public PlatformTransactionManager userTransactionManager() {
+        final JpaTransactionManager transactionManager = new JpaTransactionManager();
+        transactionManager.setEntityManagerFactory(userEntityManager().getObject());
+        return transactionManager;
+    }
+
+}

persistence-modules/spring-data-jpa/src/main/java/com/baeldung/multipledb/PersistenceUserConfiguration.java

@@ -2,7 +2,6 @@ package com.baeldung.multipledb;
 
 import com.google.common.base.Preconditions;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.context.annotation.*;
 import org.springframework.core.env.Environment;
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@@ -22,10 +21,6 @@ import java.util.HashMap;
 public class PersistenceUserConfiguration {
     @Autowired
     private Environment env;
-    
-    @Autowired
-    @Qualifier("userDataSource")
-    private DataSource userDataSource;
 
     public PersistenceUserConfiguration() {
         super();
@@ -38,7 +33,7 @@ public class PersistenceUserConfiguration {
     public LocalContainerEntityManagerFactoryBean userEntityManager() {
         System.out.println("loading config");
         final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
-        em.setDataSource(userDataSource);
+        em.setDataSource(userDataSource());
         em.setPackagesToScan("com.baeldung.multipledb.model.user");
 
         final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
@@ -51,6 +46,7 @@ public class PersistenceUserConfiguration {
         return em;
     }
 
+    @Primary
     @Bean
     public DataSource userDataSource() {
         final DriverManagerDataSource dataSource = new DriverManagerDataSource();