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Is there a way to map mutliple databases with same table names in a dynamic way?

First time I encounter this problem. The situation is:
I have more than 100 SQL databases, each one correspond to a different company and each one have the same three tables (same table names, same column names, same column data type).
Is there some way to map all these databases dynamically?
With dynamically I mean to have one class to which I can refer and make any CRUD operation.

After some research I could see what I wanted to do:
Basically I needed to change my data source in run time, for that I used a spring framework interface called AbstracRoutingDataSource.
Example:
Implementing AbstractRoutingDataSource:
public class MultiRoutingDataSource extends AbstractRoutingDataSource {
#Override
protected Object determineCurrentLookupKey() {
return DBContextHolder.getCurrentDb();
}
}
DatabaseContextHolder:
public class DBContextHolder {
private static final ThreadLocal<DBTypeEnum> contextHolder = new ThreadLocal<>();
public static void setCurrentDb(DBTypeEnum dbType) {
contextHolder.set(dbType);
}
public static DBTypeEnum getCurrentDb() {
return contextHolder.get();
}
public static void clear() {
contextHolder.remove();
}
}
Database type enum:
public enum DBTypeEnum{
DATASOURCE1("DATASOURCE1"),
DATASOURCE2("DATASOURCE2");
DBTypeEnum(final String dbTypeEnum){
this.dbTypeEnum = dbTypeEnum;
}
private String dbTypeEnum;
public String dbTypeEnum(){
return dbTypeEnum;
}
}
Persistence configuration:
#Configuration
#EnableTransactionManagement
#EnableJpaRepositories(
basePackages = "base.packages.path",
entityManagerFactoryRef = "multiEntityManager",
transactionManagerRef = "multiTransactionManager"
)
public class PersistenceConfiguration {
private final String PACKAGE_SCAN = "base.package.path";
#Bean(name = "dataSource1")
#ConfigurationProperties("spring.datasource1")
public DataSource dataSource1() {
return DataSourceBuilder.create().build();
}
#Bean(name = "dataSource2")
#ConfigurationProperties("spring.datasource2")
public DataSource dataSource2() {
return DataSourceBuilder.create().build();
}
#Bean(name = "multiRoutingDataSource")
public DataSource multiRoutingDataSource() {
Map<Object, Object> targetDataSources = new HashMap<>();
targetDataSources.put(DBTypeEnum.DATASOURCE1, dataSource1());
targetDataSources.put(DBTypeEnum.DATASOURCE2, dataSource2());
MultiRoutingDataSource multiRoutingDataSource = new MultiRoutingDataSource();
multiRoutingDataSource.setDefaultTargetDataSource(dataSource1());
multiRoutingDataSource.setTargetDataSources(targetDataSources);
return multiRoutingDataSource;
}
#Bean(name = "multiEntityManager")
public LocalContainerEntityManagerFactoryBean multiEntityManager() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(multiRoutingDataSource());
em.setPackagesToScan(PACKAGE_SCAN);
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(hibernateProperties());
return em;
}
#Bean(name = "multiTransactionManager")
public PlatformTransactionManager multiTransactionManager() {
JpaTransactionManager transactionManager
= new JpaTransactionManager();
transactionManager.setEntityManagerFactory(
multiEntityManager().getObject());
return transactionManager;
}
#Bean(name = "dbSessionFactory")
public LocalSessionFactoryBean dbSessionFactory() {
LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
sessionFactoryBean.setDataSource(multiRoutingDataSource());
sessionFactoryBean.setPackagesToScan(PACKAGE_SCAN);
sessionFactoryBean.setHibernateProperties(hibernateProperties());
return sessionFactoryBean;
}
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.show_sql", true);
properties.put("hibernate.format_sql", true);
return properties;
}
}
Then you need to have all of your database information in a .properties file:
spring.datasource1.jdbcUrl=jdbc:sql:sql-url:3306/datasource1
spring.datasource1.username=username
spring.datasource1.password=password
spring.datasource1.driver-class-name= Driver
spring.datasource2.jdbcUrl=jdbc:sql:sql-url:3306/datasource2
spring.datasource2.username=username
spring.datasource2.password=password
spring.datasource2.driver-class-name= Driver
Then you need to map your entity:
#Entity
#Table(name = "table_name")
#Getter
#Setter
public class MyEntity implements Serializable {
#Id
#Column(name = "ID", columnDefinition = "varchar(17)")
private String id;
//more fields...
}
I used spring CrudRepositories interface for this entity
public interface IMyEntityRepository extends CrudRepository<MyEntity, String> {
}
Finally my controller is prepared to change datasource depending on a JSON field in my request.
JSON:
{
"dataSource":"DATASOURCE1"
//more fields ...
}
RESTController:
#PutMapping("/url/{id}")
public ResponseEntity<?> editMyEntity(#RequestBody RequestObject request #PathVariable String id){
DBContextHolder.setCurrentDb(DBTypeEnum.valueOf(request.getDataSource);
iMyEntitiRepository.getMyEntity(id);
//...
}

What is wrong of this code? (Multiple Datasource Oracle)

Currently I have to connect two Oracle Datasources in my Spring Boot proyect. I think that I did well the configuration because Spring validated my connection but when I call a service this always response me "Empty". I think is because the TransactionManager don't change.
This is my project structure:
- project
⊢---- config
⊢---- controllers
∟---- models
⊢---- dao
| ⊢---- db1
| ∟---- db2
⊢---- entity
| ⊢---- db1
| ∟---- db2
⊢---- services
⊢---- db1
∟---- db2
This are my entities classes:
package project.models.entity.db1;
//// IMPORTS
#Entity(name = "User")
#Table(name = "T_USER")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
#Id
private Long id;
private String name;
private String surname;
private String username;
private String password;
////// CONSTRUCT
////// GETTERS & SETTERS
////// HASCODE, EQUALS AND TOSTRING
}
package project.models.entity.db2;
//// IMPORTS
#Entity(name = "Shareholder")
#Table(name = "Shareholder")
public class Shareholder implements Serializable {
private static final long serialVersionUID = 1L;
#Id
private Integer id;
private Integer numberTitles;
////// CONSTRUCT
////// GETTERS & SETTERS
////// HASCODE, EQUALS AND TOSTRING
}
This are my repositories classes:
package project.models.dao.db1;
//// IMPORTS
#PersistenceContext(name = "db1")
#Repository
public interface IUserDao extends JpaRepository<User, Long> {
}
package project.models.dao.db2;
//// IMPORTS
#PersistenceContext(name = "db2")
#Repository
public interface IShareholderDao extends JpaRepository<Shareholder, Integer> {
}
This are my services classes:
package project.models.services.db1.impl;
//// IMPORTS
#Service
public class UserServiceImpl implements IUserService {
#Autowired
private IUserDao userDao;
#Override
#Transactional("transactionManager")
public List<User> findAll() {
return userDao.findAll();
}
#Override
#Transactional("transactionManager")
public User findById(Long id) {
return userDao.findById(id).orElse(null);
}
package project.models.services.db2.impl;
//// IMPORTS
#Service
public class ShareholderServiceImpl implements IShareholderService {
#Autowired
private IShareholderDao shareholderDao;
#Override
#Transactional("db2TransactionManager")
public List<Shareholder> findAll() {
return shareholderDao.findAll();
}
#Override
#Transactional("db2TransactionManager")
public Shareholder findById(Integer id) {
return shareholderDao.findById(id).orElse(null);
}
}
And this are my config classes:
package project.config;
//// IMPORTS
#Configuration
#ConfigurationProperties(prefix = "oracle1")
#EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactory", transactionManagerRef = "transactionManager", basePackages = {
"project.models.dao.db1" })
#EnableTransactionManagement
#Validated
public class Db1Config {
#NotNull
private String username;
#NotNull
private String password;
#NotNull
private String url;
#Bean(name = "entityManagerFactory")
public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws SQLException {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[] { "project.models.entity.db1" });
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(hibernateProperties());
em.setPersistenceUnitName("db1");
return em;
}
#Bean(name = "dataSource")
DataSource dataSource() throws SQLException {
OracleDataSource dataSource = new OracleDataSource();
dataSource.setUser(username);
dataSource.setPassword(password);
dataSource.setURL(url);
dataSource.setImplicitCachingEnabled(true);
dataSource.setFastConnectionFailoverEnabled(true);
return dataSource;
}
#Primary
#Bean(name = "transactionManager")
public PlatformTransactionManager transactionManager() throws SQLException {
return new JpaTransactionManager(entityManagerFactory().getObject());
}
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", "org.hibernate.dialect.Oracle10gDialect");
properties.put("hibernate.show_sql", "true");
properties.put("hibernate.hbm2ddl.auto", "validate");
return properties;
}
}
package project.config;
//// IMPORTS
#Configuration
#ConfigurationProperties(prefix = "oracle2")
#EnableJpaRepositories(entityManagerFactoryRef = "db2EntityManagerFactory", transactionManagerRef = "db2TransactionManager", basePackages = {
"project.models.dao.db2" })
#EnableTransactionManagement
#Validated
public class Db2Config {
#NotNull
private String username;
#NotNull
private String password;
#NotNull
private String url;
#Bean(name = "db2EntityManagerFactory")
public LocalContainerEntityManagerFactoryBean db2EntityManagerFactory() throws SQLException {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(db2DataSource());
em.setPackagesToScan(new String[] { "project.models.entity.db2" });
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(hibernateProperties());
em.setPersistenceUnitName("db2");
return em;
}
#Bean(name = "db2DataSource")
DataSource db2DataSource() throws SQLException {
OracleDataSource dataSource = new OracleDataSource();
dataSource.setUser(username);
dataSource.setPassword(password);
dataSource.setURL(url);
dataSource.setImplicitCachingEnabled(true);
dataSource.setFastConnectionFailoverEnabled(true);
return dataSource;
}
#Bean(name = "db2TransactionManager")
public PlatformTransactionManager db2TransactionManager() throws SQLException {
return new JpaTransactionManager(db2EntityManagerFactory().getObject());
}
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", "org.hibernate.dialect.Oracle10gDialect");
properties.put("hibernate.show_sql", "true");
properties.put("hibernate.hbm2ddl.auto", "validate");
return properties;
}
}
And my main application:
package project;
//// IMPORTS
#SpringBootApplication
#EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class })
#EnableCaching
public class ProjectApplication {
#Autowired
private IUserService userService;
#Autowired
private IShareholderService shareholderService;
public static void main(String[] args) {
SpringApplication.run(ProjectApplication.class, args);
}
#PostConstruct
void init() {
List<User> user = userService.findAll();
List<Shareholder> shareholder = shareholderService.findAll();
System.out.println();
System.out.println(user);
System.out.println(shareholder);
System.out.println();
}
}
And always response me:
[User [id=39, name=Jack, surname=Sparrow, ...], [...], ...]
[]
What is the error? Because I don't see it.
Thank you very much

In Db2Config class, package being scanned is different than Db1Config.
Db1Config:
em.setPackagesToScan(new String[] { "project.models.entity.db1" });
Db2Config
em.setPackagesToScan(new String[] { "project.models.dao.db2" });

Getting org.hibernate.MappingException: Unknown entity. Using Spring framework

I have just started working in java spring framework. Am just trying to populate a simple table with columns id and a name. But am getting :
Unknown entity: org.hibernate.MappingException
I get that it is commonly encountered exception. But I couldn't fix this. You can find the The entity, dao and hibernate config am using below.
HibernateConfig.java
#Getter #Setter
#Configuration#ConfigurationProperties(prefix = "databaseConfiguration")
public class HibernateConfig {
#Value("${driverClass}")
private String driverClass;
#Value("${url}")
private String url;
#Value("username")
private String username;
#Value("password")
private String password;
#Value("${hibernateDialect}")
private String hibernateDialect;
#Value("${hbm2ddlAuto}")
private String hbm2ddlAuto;
private Integer minSize;
private Integer maxSize;
#Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
#Bean
public Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.hbm2ddl.auto", hbm2ddlAuto);
properties.put("hibernate.dialect", hibernateDialect);
properties.put("hibernate.c3p0.min_size", minSize);
properties.put("hibernate.c3p0.max_size", maxSize);
return properties;
}
#Bean
public LocalSessionFactoryBean sessionFactory(DataSource dataSource) {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
#Bean
public ITestDao testDao() {
ITestDao testDao = new TestDao();
return testDao;
}
}
All the properties are being taken from the .yml file. ITestDao is the interface with abstract add() method in it.
Entity class
#Getter
#Setter
#Entity
#Table(name = "test")
public class Test {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id", nullable = false, unique = true)
private Long id;
#Column(name = "dump", nullable = false)
private String dump;
}
Dao class
#Repository
#Transactional
#Getter
#Setter
public class TestDao implements ITestDao {
#Autowired
private LocalSessionFactoryBean sessionFactoryBean;
public Test add(Test test) {
try {
sessionFactoryBean.getObject().getCurrentSession().getTransaction().begin();
sessionFactoryBean.getObject().getCurrentSession().persist(test);
} finally {
sessionFactoryBean.getObject().getCurrentSession().getTransaction().commit();
}
return test;
}
}
A service method will call this dao with #Transactional annotated above it. But while calling this add() dao method am getting Unknown entity:
org.hibernate.MappingException

Try this way :
#Bean
public LocalSessionFactoryBean sessionFactory(DataSource dataSource) {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setPackagesToScan(new String[] { "my.package.model" });// You need to provide to adapt : my.package.model
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
Good luck

You might be missing below annotation.
#EntityScan("some.known.persistence")
The #EntityScan only identifies which classes should be used by a specific persistence context.

#Autowired SessionFactory returning null spring in Java configuration

I m having null pointer exception in sessionFactory when i try to use DI in sessionFactory I have to turn spring 3 project into Spring 4 with no xml. I dont know what the problem i m facing, SessionFactory doesnot autowired at all. when i try to test case generic doa Add Method
here is my Configuration File for bean
#Configuration
#EnableTransactionManagement
#EnableWebMvc
#ComponentScan(basePackages = "io.github.bibekshakya35.ehealth")
public class EhealthCofiguration {
#Bean
public ViewResolver getViewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/view/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
#Bean(name = "dataSource")
public javax.sql.DataSource getDataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("org.postgresql.Driver");
dataSource.setUrl("jdbc:postgresql://localhost:5432/ehealth");
dataSource.setUsername("test");
dataSource.setPassword("test123");
return dataSource;
}
#Autowired
#Bean(name = "sessionFactory")
public SessionFactory getSessionFactory(javax.sql.DataSource dataSource) {
LocalSessionFactoryBuilder sessionBuilder = new LocalSessionFactoryBuilder(dataSource);
sessionBuilder.scanPackages("io.github.bibekshakya35.ehealth.model");
sessionBuilder.addProperties(getHibernateProperties());
return sessionBuilder.buildSessionFactory();
}
private Properties getHibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.show_sql", "true");
properties.put("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
properties.put("hibernate.hbm2ddl.auto", "update");
return properties;
}
#Autowired
#Bean(name = "transactionManager")
public HibernateTransactionManager getTransactionManager(
SessionFactory sessionFactory) {
HibernateTransactionManager transactionManager = new HibernateTransactionManager(
sessionFactory);
return transactionManager;
}
}
to load this class i have created
public class EhealthWebAppIntializer implements WebApplicationInitializer {
#Override
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
applicationContext.register(EhealthCofiguration.class);
ServletRegistration.Dynamic dispatcher =servletContext.addServlet("SpringDispatcher", new DispatcherServlet(applicationContext));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
}
}
this is my generic doa class where i m injecting SessionFactory when it try to access sessionFactory.getCurrentSession(); NPE is occur,
#Repository
#Transactional
public class HibernateDAO<T extends Serializable> implements IGenericDao<T> {
private Class<T> clazz;
Session session;
#Autowired
SessionFactory sessionFactory;
private static final Logger LOG = Logger.getLogger(HibernateDAO.class.getName());
#Override
public void setClazz(Class<T> clazzToSet) {
this.clazz = clazzToSet;
}
#Override
public void create(T entity) {
session = getCurrentSession();
LOG.log(Level.INFO, "inside create entity and you just bind your session to the current one{0}", session.toString());
session.saveOrUpdate(entity);
LOG.info("saved");
session.flush();
session.refresh(entity);
}
protected Session getCurrentSession() {
return sessionFactory.getCurrentSession();
}
}
Here is my stack trace for NPE
Exception in thread "main" java.lang.NullPointerException
at io.github.bibekshakya35.ehealth.DAO.genericdao.HibernateDAO.getCurrentSession(HibernateDAO.java:115)
at io.github.bibekshakya35.ehealth.DAO.genericdao.HibernateDAO.create(HibernateDAO.java:85)
at io.github.bibekshakya35.ehealth.service.impl.user.main(user.java:46)
here is my user entity
#Entity
#Table(name = "users")
public class User implements Serializable, AbstractEntity {
#Id
#Column(name = "username",unique = true)
private String userName;
#NotNull(message = "password cannot be empty")
#Column(name = "users_password")
private String userPassword;
#Embedded
private UserProfile userProfile;
#Embedded
private AuditInfo auditInfo;
#Enumerated(EnumType.STRING)
private UserType userType;
#Column(name = "is_active")
private boolean active = true;
//getter n setter
}

In chat, You provided me with this code :
public static void main(String[] args) {
User user = new User();
IGenericDao<User> iGenericDao = new HibernateDAO<>();
user.setUserName("bibekshakya35");
user.setUserPassword("ros3");
user.setUserType(UserType.GUEST);
user.setActive(true);
UserProfile userProfile = new UserProfile();
userProfile.setAge(21);
userProfile.setBasicInfo("kdhsa");
userProfile.setEmailId("dsadas#gmail.com");
userProfile.setUserGender(UserGender.Male);
userProfile.setFullname("bibek shakya");
userProfile.setMobileNumber("45454545");
userProfile.setLandLineNumber("445444");
userProfile.setUserProfilePic("index.jsp");
user.setUserProfile(userProfile);
AuditInfo auditInfo = new AuditInfo();
auditInfo.setCreatedOn(new Date());
auditInfo.setModifiedOn(new Date());
auditInfo.setVerifiedOn(new Date());
user.setAuditInfo(auditInfo);
iGenericDao.create(user);
}
Cause of error:
As You are creating the new HibernateDAO instance like this IGenericDao<User> iGenericDao = new HibernateDAO<>(); This is creating the problem.
In the case where You are using annotations, creating new instance manually ,usually causes the above mentioned error.
Reason of error:
Spring can only autowire beans that it manages; if you call new to create a bean yourself, #Autowired fields don't get filled in (and methods like #PostConstruct aren't called).
Solution:
You need to add #autowired to the HibernateDAO which will instantiate it with the exact class which includes the real #Autowired SessionFactory.
Example:
Usually we do it in the class which is itself annotated with annotations like #Controller or #Service.
Like this
#Controller
#RequestMapping(value="/someURL")
public class mainClass {
#Autowired
HibernateDAO abc;
//Code (methods) to test Your CRUD Operations
}

Lazy Loading of One to Many Doesnt Work

I have 2 entities - Media and Keyword with one to many relationship. I though I marked the fetch to Lazy Madia is still fetching all the keywords.
I am using spring 3.2 Hibernate 4.3.4
Media Entity:
#Entity
public class Media {
#Id
#NotNull
#Column(name = "mediaid")
private String mediaId;
#NotNull
#OneToMany(cascade = CascadeType.ALL, mappedBy = "media", fetch = FetchType.LAZY)
private List<Keyword> keywords;
public List<Keyword> getKeywords() {
return keywords;
}
public void setKeywords(List<Keyword> keywords) {
if ( this.keywords!=null && this.keywords.size()>0 )
this.keywords.addAll(keywords);
else
this.keywords = keywords;
for (Keyword keyword : keywords) {
keyword.setMedia(this);
}
}
}
Keyword Entity:
#Entity(name = "keywords")
public class Keyword {
#Id
#NotNull
#Column(unique = true)
private String idKey;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "idmedia")
private Media media;
public Media getMedia() {
return media;
}
public void setMedia(Media media) {
this.media = media;
if (idKey == null || idKey.isEmpty())
setIdKey(this.media.getMediaId());
else
setIdKey(this.media.getMediaId() + "_" + idKey);
if (!media.containsKeyword(this))
media.getKeywords().add(this);
}
}
I can see the entities being fetch in the show_sql output but also this test fails
#WebAppConfiguration
#ContextConfiguration(classes = {PersistenceConfig.class})
#Transactional
#TransactionConfiguration(defaultRollback = true)
public class MediasRepositoryTest extends AbstractTransactionalTestNGSpringContextTests {
#Autowired
MediasRepository mediasRepository;
#PersistenceContext
EntityManager manager;
public void thatMediaLazyLoadsKeywords() throws Exception {
PersistenceUnitUtil unitUtil = manager.getEntityManagerFactory().getPersistenceUnitUtil();
Media media = DomainFixtures.createMedia();
Media savedMedia = mediasRepository.save(media);
Media retrievedMedia = mediasRepository.findOne(savedMedia.getMediaId());
assertNotNull(retrievedMedia);
assertFalse(unitUtil.isLoaded(retrievedMedia, "keywords"));
}
}
Configuration:
#EnableTransactionManagement
public class PersistenceConfig {
static Logger logger = LoggerFactory.getLogger(PersistenceConfig.class);
#Autowired
private Environment env;
// #Value("${init-db:false}")
private String initDatabase = "false";
#Bean
public DataSource dataSource()
{
logger.info("Starting dataSource");
BasicDataSource dataSource = new BasicDataSource();
logger.info("jdbc.driverClassName"+ env.getProperty("jdbc.driverClassName"));
dataSource.setDriverClassName(env.getProperty("jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("jdbc.url"));
dataSource.setUsername(env.getProperty("jdbc.username"));
dataSource.setPassword(env.getProperty("jdbc.password"));
logger.info("End dataSource");
return dataSource;
}
#Bean
public EntityManagerFactory entityManagerFactory() throws SQLException
{
logger.info("Starting entityManagerFactory");
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setGenerateDdl(Boolean.TRUE);
vendorAdapter.setShowSql(Boolean.parseBoolean(env.getProperty("hibernate.show_sql")));
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("....");
factory.setDataSource(dataSource());
Properties jpaProperties = new Properties();
jpaProperties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
jpaProperties.put("hibernate.enable_lazy_load_no_trans", true);
jpaProperties.put("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
factory.setJpaProperties(jpaProperties);
factory.afterPropertiesSet();
logger.info("End entityManagerFactory");
return factory.getObject();
}
.
.
.
}

You test is running in the context of a single transaction.
The Keywords are not being fetched, they're still in the persistence context from when you created them.
Try adding a manager.clear() after your save method call.

FetchType.LAZY is just a hint to the persistence provider, it is not a setting you can rely on. The persistence provider is free to load the attributes whenever it sees fit.
Thus you cannot reliably test whether lazy loading works as expected.