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How to connect Two Database MySQL and MongoDB in the same project? Is it possible?

Currently I'm using Hibernate(MySQL) with Spring, the configuration is running fine for me, but once I configured another configuration mongo-config.xml file and trying to run a test case with mongodb it's showing Error creating bean with name .... from first configuration.
Below is my mongo-config.xml
<context:annotation-config />
<context:component-scan base-package="com.test.mongo" />
<context:property-placeholder location="classpath:mongo-dao.properties" />
<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
<constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
</bean>
<bean id="mongoDbFactory" class="org.springframework.data.mongodb.core.MongoFactoryBean">
<property name="driverClassName" value="${spring.datasource.driverClassName}" />
<property name="host" value="${spring.data.mongodb.host}" />
<property name="port" value="${spring.data.mongodb.port}" />
<property name="databaseName" value="${spring.data.mongodb.database}" />
and my first configuration for hibernate is looks like something
<context:component-scan base-package="com.hb.dao" />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${db.jdbc.driverClassName}" />
<property name="url" value="${db.jdbc.url}" />
<property name="username" value="${db.jdbc.username}" />
<property name="password" value="${db.jdbc.password}" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan">
<list>
<value>com.hb..dao.domain.entity</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql:false}</prop>
<prop key="hibernate.format_sql">${hibernate.format_sql:false}</prop>
</props>
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
And the stack trace is
java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:99)
at org.springframework.test.context.DefaultTestContext.getApplicationContext(DefaultTestContext.java:101)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:331)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:213)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:290)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'accessProfileDaoImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory com.soe.dao.AbstractDao.sessionFactory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.
Dependency annotations:
Here is my test Class-
public class MongoQuestionsTest extends BaseDaoMongoTest{
private static final Logger logger = LogManager.getLogger(MongoQuestionsTest.class);
#Autowired
private MongoTestDao mongoTestDaoImpl;
#Test
public void saveQuestions(){
MongoQuestions mongoQuestions = new MongoQuestions();
mongoQuestions.setUsername("Hi");
mongoQuestions.setPassword("Hello");
mongoTestDaoImpl.save(mongoQuestions);
logger.debug("Mongo User Set with id " + mongoQuestions.getId());
}
and **BaseDaoMongoTest**---
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations={"classpath:/mongo-config-test.xml"})
public class BaseDaoMongoTest {
}
And in MongoTestDaoImpl class I just Auto-wired MongoTemplate and calling save() method that's it.

I'm not sure whether this is the best solution. But, it worked for me.
If you have two relational databases using Jpa module, then I would suggest you to create entity and transaction manager beans to read each datasource config. Refer the below link for the above use case.
springboot always read data from primary datasource
As you wish to have a combination of SQL and NoSQL, I would create entity and transcation manager beans for MySQL database as it works well with Jpa. And leave as-is configuration for Mongo(configs read directly from application.properties).
MySQLConfiguration datasource config class :
#Configuration
#PropertySource("classpath:persistence-multiple-db.properties")
#EnableJpaRepositories(basePackages = "com.springdata.dao.mysql", entityManagerFactoryRef = "mysqlEntityManager", transactionManagerRef = "mysqlTransactionManager")
public class MySQLConfiguration {
#Autowired
private Environment env;
#Bean
#Primary
public LocalContainerEntityManagerFactoryBean mysqlEntityManager() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(myMySQLDataSource());
em.setPackagesToScan(new String[] { "com.springdata.models" });
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
HashMap<String, Object> properties = new HashMap<String, Object>();
properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
em.setJpaPropertyMap(properties);
return em;
}
#Bean
#Primary
public DataSource myMySQLDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("spring.mysql.jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("spring.mysql.jdbc.url"));
dataSource.setUsername(env.getProperty("spring.mysql.user"));
dataSource.setPassword(env.getProperty("spring.mysql.pass"));
return dataSource;
}
#Bean
#Primary
public PlatformTransactionManager mysqlTransactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(mysqlEntityManager().getObject());
return transactionManager;
}
Above datasource config params are read from classpath:persistence-multiple-db.properties file in the classpath.
# mysql jdbc connections
spring.mysql.jdbc.driverClassName=com.mysql.jdbc.Driver
spring.mysql.jdbc.url=jdbc:mysql://localhost:3306/test?autoReconnect=true&useSSL=false
spring.mysql.user=root
spring.mysql.pass=password1
# hibernate.X
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
The above configuration, should be suffice to deal MySQL datasource. To have mongo configuration in your project, add the below lines to application.properties.
# mongo configuration
spring.data.mongodb.uri=mongodb://localhost
spring.data.mongodb.database=test
Springboot will automatically create the necessary mongo datasource beans and keeps them readily available for spring container to use.
Now, create repository interfaces for both MySQL and Mongo datasources.
MyMongoRepository interface:
#Transactional
public interface MyMongoRepository extends MongoRepository<Users, String>{
}
MySQLRepository interface:
#Transactional
public interface MySQLRepository extends JpaRepository<Users, String>{
}
Users pojo class :
#Entity
#Table(name = "users")
#Document(collection="users")
#Data
public class Users {
#Id
#javax.persistence.Id
private String id;
private String name;
private Integer age;
}
Have added below annotations to enable mongorepositoreis and for component scan to springboot main class.
#SpringBootApplication
#ComponentScan(basePackages = { "com.springdata" })
#EnableMongoRepositories(basePackages={"com.springdata.dao.mongo"})
public class SpringbootmysqlmongoApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootmysqlmongoApplication.class, args);
}
}
Finally, some code to test.
MyRepositoryImpl class:
#Service
public class MyRepositoryImpl {
#Autowired
private MyMongoRepository myMongoRepository;
#Autowired
private MySQLRepository mySQLRepository;
#PostConstruct
public void extractUsers(){
myMongoRepository.findAll().forEach((user) -> System.out.println("user name from mongo is : "+user.getName()));
mySQLRepository.findAll().forEach((user) -> System.out.println("User name from mysql is : "+user.getName()));
}
}
Have created users table in mysql test database and users collection in mongo test database.
Lastly, have uploaded my code to git repository.
https://github.com/harshavmb/springbootmysqlmongo

Invalid property of bean class is not writable or an invalid setter method

This may looks like a duplicate of this question. But this is different.
I was trying to refactor my legacy code by using method injection in spring.
I have a bean class which contains many static helper methods. My targeted method as follows:
Context.java
private static MessageSender messageSender;
//...
public static MessageSender getMessageSender(){
return messageSender;
}
Context bean
<bean id="context" class="org.abc.Context">
<property name="messageSender"><ref bean="mailMessageSender"/></property>
</bean>
MailMessageSender.java
public abstract class MailMessageSender{
protected abstract Session createSession();
//using createSession() somewhere in this class
}
MailMessageSender bean
<bean id="session" class="javax.mail.Session" scope="prototype" />
<bean id="mailMessageSender" class="org.abc.MailMessageSender">
<lookup-method name="createSession" bean="session"/>
</bean>
I'm getting invalid property error when I'm installing the project.

You can't inject static field, change your variable in Context.java become like this:
private MessageSender messageSender;
//...
public MessageSender getMessageSender(){
return messageSender;
}

How to use #Autowired instead of manually loading Spring beans?

I have a small Java application which connects to a MySQL database. For database connectivity ONLY, I'd like to use Spring to manage a JNDI based connection pool.
I have a working implementation for the above but this requires manually loading the JNDI connection bean, whereas I'd like to use #Autowired.
How can I convert my working code to one that uses #Autowired to get the JNDI connection ?
This is my beans.xml file (inside src/main/resources folder):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns= ....>
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/Database"/>
</bean>
<bean id="databaseMapper2Impl"
class="com.dataaccess.DatabaseMapper2Impl">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>
The is a section of my DatabaseMapper2Impl class:
public class DatabaseMapper2Impl {
private DataSource dataSource;
private JdbcTemplate jdbcTemplateObject;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplateObject = new JdbcTemplate(dataSource);
}
public OrderDTO getOrder(String orderNumber, String envToUse) {
String getOrderSql = "SELECT * FROM REPORTING.ORDER where ORDER_NUMBER = ? limit 1";
List<OrderDTO> orders = jdbcTemplateObject.query(getOrderSql, new Object[] { orderNumber }, new OrderMapper());
if (orders == null || orders.isEmpty()) {
return null;
} else {
return orders.get(0);
}
}
}
This is the class where the JNDI connection bean is manually instantiated:
public class DataDelegateImpl {
public OrderDTO getOrder(String orderNumber, String envToUse) {
ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");
DatabaseMapper2Impl x = (DatabaseMapper2Impl) context.getBean("databaseMapper2Impl");
return x.getOrder(orderNumber, envToUse);
}
}

In order for Spring to manage the instantiation and injection of your DatabaseMapper2Implbean, you will have to create an ApplicationContext, and declare the bean in that context, exactly as you have done.
If the question is just how to avoid using XML for that declaration, you could annotate DatabaseMapper2Impl with #Component and instead use
ApplicationContext context = new AnnotationConfigApplicationContext(DatabaseMapper2Impl.class);
to create the context.
If you really need to have the DatabaseMapper2Impl #Autowired into an instance of DataDelegateImpl, then that instance would also have to be controlled by Spring, so you'd have to create the context at a higher level and make the DataDelegateImpl a bean as well.

Autowiring against Interface returns null - Spring MVC

I am working on this Spring MVC project where I have trouble getting this Dao class auto wired in the controller through an Interface that is implemented by the Dao. This is portion of my spring-config.xml. I am using aspectJ, Annotation and TX management.
<aop:aspectj-autoproxy />
<context:component-scan base-package="com.simulator" />
<context:annotation-config />
<tx:annotation-driven />
<context:property-placeholder
location="classpath*:config.properties" />
<bean id="oidDao" class="com.simulator.service.OidDao">
<property name="ipaddressNC" value="${ipaddressNC}" />
<property name="ipaddressOM" value="${ipaddressOM}" />
</bean>
Dao class:
#Component
public class OidDao implements OidManager {
#Autowired
private SessionFactory sessionFactory;
private String ipaddressNC;
private String ipaddressOM;
public String getIpaddressNC() {
return this.ipaddressNC;
}
public void setIpaddressNC(String ipaddressNC) {
this.ipaddressNC = ipaddressNC;
}
public String getIpaddressOM() {
return ipaddressOM;
}
public void setIpaddressOM(String ipaddressOM) {
this.ipaddressOM = ipaddressOM;
}
OidManager:
public interface OidManager {
public String getIpaddressNC();
public String getIpaddressOM();
}
Controller:
#Controller
public class HomeController {
#Autowired
OidManager oim;
#RequestMapping(value = "/", method = RequestMethod.GET)
public String indexpage(ModelMap modelMap) {
ApplicationContext context =
new ClassPathXmlApplicationContext(new String[] {"spring-config.xml"});
o = (OidManager)context.getBean("oidDao");
o.getIpaddressNC(); // ---> this returns data read from ext properties file and works fine
oim.getIpaddressNC(); // ---> this returns null`
I am trying to re-use the Dao, hence I dont want to call the ApplicationContext multiple times from each method. What am I doing wrong? If I make the variables getIpaddressNC, getIpaddressOM static, then auto wiring works, if not oim returns null though the variables are initialized via setters on application load.

You used both Component Scanning and Manual Wiring for OidDao. You defined oidDao in xml config, as follows:
<bean id="oidDao" class="com.simulator.service.OidDao">
<property name="ipaddressNC" value="${ipaddressNC}" />
<property name="ipaddressOM" value="${ipaddressOM}" />
</bean>
Then, added a Component annotation on OidDao, as follows:
#Component
public class OidDao implements OidManager {
...
}
Drop the Component annotation and you'll be fine, i guess! Because otherwise, <context:component-scan base-package="com.simulator" /> will pick OidDao and instantiate an instance from it with default constructor and without calling your setters.

You are using #Component annotation + you have also defined a bean. Therefore actually two beans are created. One created due to use of #Component would have the properties set to 'null'. This is expected since you are not setting the properties to any value. Either remove #Component annotation and use 'autowire-candidate="true"' property on bean definition or else remove the bean definition in XML and use relevant annotation on the class to set properties to correct values from property file.

Change your bean definition to:
<bean id="oim" class="com.simulator.service.OidDao">
<property name="ipaddressNC" value="${ipaddressNC}" />
<property name="ipaddressOM" value="${ipaddressOM}" />
</bean>
Let this create bean with id oim which can be set to the property oim in your Controller.

How to inject EntityManager in EntityListeners

I need to inject EntityManager in EntityListener class so that I can perform CRUD operation on it.
POJO:
#Entity
#EntityListner(AuditLogging.class)
class User
{
//Getter / setter of properties
}
AuditLogging (Listner class)
public class AuditInterceptor
{
#PersistenceContext
EntityManager entityManager;
public void setEntityManager(EntityManager entityManager)
{
this.entityManager = entityManager;
}
#PrePersist
public void prePersist(Object obj)
{
// Here I want to use ENTITY manager object so that I can perform CRUD operation
// with prePersist coming object.
entityManager.unwrap(Session.class).save(obj);
// But I am getting NULL POINTER EXCEPTION for entity manager object
}
}
JDBC-CONFIg.xml
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter" />
<property name="packagesToScan" value="com.XXXXX.entity" />
<property name="jpaProperties">
</bean>
<!-- Datasource -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="${jdbc.driver.classname}" />
<property name="jdbcUrl" value="${jdbc.url}" />
</bean>
<!-- transaction Manager -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
EntityListener is not managed by any of the container.EntityListeners are instanciated by JPA, so Spring does not have an opportunity to inject EntityManager.
My question is, how we can inject inject EntityManager in EntityListener class so that I can perform CRUD operation on it ???

I have faced a similar problem where I was trying to create history records for an entity using EntityListeners.
In order to resolve this problem, I have created utility class BeanUtil with a static method to get the bean and used this util class to get bean inside my Entitylistener class
#Service
public class BeanUtil implements ApplicationContextAware {
private static ApplicationContext context;
#Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
context = applicationContext;
}
public static <T> T getBean(Class<T> beanClass) {
return context.getBean(beanClass);
}
}
Now we can call BeanUtil.getBean() to get the bean of any type
public class FileEntityListener {
#PrePersist
public void prePersist(File target) {
perform(target, INSERTED);
}
#Transactional(MANDATORY)
private void perform(File target, Action action) {
EntityManager entityManager = BeanUtil.getBean(EntityManager.class);
entityManager.persist(new FileHistory(target, action));
}
}
We can use this BeanUtil class to get any spring managed bean from anywhere, To know more you can read my article JPA Auditing: Persisting Audit Logs Automatically using EntityListeners.

Anyways, I got this done by getting entityManager reference from EntityManagerFactory bean which is configured in my jdbc-config.xml. But again this is not what I wanted. I wanted to work around with #PersistenceContext.
#Autowired
EntityManagerFactory entityManagerFactory;
private static EntityManager entityManager;
public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
entityManager=entityManagerFactory.createEntityManager();
this.entityManagerFactory = entityManagerFactory;
}
Here are few notes that we need to keep in mind:
We can't inject an EntityManager into an EntityListener (through
#PersistenceContext). EntityListener is not managed by any of the
containers
#PersistenceContext class cannot be static. So we cant
attain the instance while class loading.
EntityListeners are
instantiated by JPA, so Spring does not have an opportunity to
inject EntityManager

Well, the first solution which came into my mind is a little "hack", but should work.
public class AuditInterceptor {
static setEntityManager emf;
#Autowired
public void setEntityManagerFactory(EntityManager emf) {
AuditInterceptor.emf = emf;
}
#PrePersist
public void prePersist(Object obj) {
EntityManager entityManager = emf.getEntityManager();
// Here I want to use ENTITY manager object so that I can perform CRUD operation
// with prePersist coming object.
entityManager.unwrap(Session.class).save(obj);
// But I am getting NULL POINTER EXCEPTION for entity manager object
}
}
Inside of your code use EntityManager entityManager = emf.getEntityManager()
Declare your AuditInterceptor as a spring bean (#Component with component-scan or define AuditorInterceptor as a bean)

I used a ThreadLocal to pass the Spring Application Context which contains EntityManager around. Though I am not sure if it is safe Is it safe to pass in the Spring Application Context into a ThreadLocal associated with a request? but so far it is working for me.

The listener can be modified to have autowiring like this. However this needs to be done on on the handlers and not the constructor (doing it on the constructor seems less predictable). You are also not limited to the EntityManager but you have access to the whole context.
#Autowired
private EntityManager entityManager;
#Autowired
private MyDao myDao;
#PrePersist
public void pre() {
SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
Objects.requireNotNull(myDao);
myDao.doSomething();
}