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Multiple DataSource Switching problem in Spring MVC. when the 2nd dataSource is unavailable it automatically uses 1st datasource where 2nd is referred

I have configured a 2 dataSources in my SpringMVC Project, but when the 2nd
dataSource is unavailable it automatically uses 1st datasource where 2nd is referred.
I want to stop this switching.
Here is the code:
dispatcher-servlet.xml:
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource" lazy-init="false">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="defaultAutoCommit" value="true"/>
<property name="testOnBorrow" value="true"/>
<property name="initialSize" value="1"/>
<property name="maxActive" value="1"/>
<property name="maxWait" value="500"/>
<property name="maxIdle" value="2"/>
</bean>
<bean id="dataSource1" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource" lazy-init="false">
<property name="driverClassName" value="${jdbc.driverClassName1}"/>
<property name="url" value="${jdbc.url1}"/>
<property name="username" value="${jdbc.username1}"/>
<property name="password" value="${jdbc.password1}"/>
<property name="defaultAutoCommit" value="true"/>
<property name="testOnBorrow" value="true"/>
<property name="initialSize" value="1"/>
<property name="maxActive" value="3"/>
<property name="maxWait" value="500"/>
<property name="maxIdle" value="8"/>
</bean>
BaseNamedParameterJdbcDaoSupport.java class:
public class BaseNamedParameterJdbcDaoSupport extends NamedParameterJdbcDaoSupport{
#Autowired
public void setDataSourceFor1(DataSource dataSource) {
// System.out.println("Main DS"+dataSource);
setDataSource(dataSource);
}
}
BaseNamedParameterJdbcDaoSupportForMirrorDB.java :
public class BaseNamedParameterJdbcDaoSupportForMirrorDB extends NamedParameterJdbcDaoSupport{
#Autowired
public void setDataSourceFor2(DataSource dataSource1) {
// System.out.println("ForMirrorDB dataSource1"+dataSource1);
setDataSource(dataSource1);
}
}

It is not possible that the DataSource which are maintained with different name will automatically switch. I think you have implemented some other logic to work with these two DataSource objects.
Check your DAO/Service code to utilizing the "BaseNamedParameterJdbcDaoSupport" & "BaseNamedParameterJdbcDaoSupportForMirrorDB" with proper #Autowired.

Springboot multi datasource in xml file

I want to create a restService with Springboot. But I want a configurable datasource, I want to have the capacity to add a new datasource when I want. But I have this exception :
> No qualifying bean of type 'javax.sql.DataSource' available: expected
> single matching bean but found 2
And I'm using this code :
<bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true"/>
<property name="generateDdl" value="true"/>
<property name="database" value="ORACLE"/>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.OracleDriver"/>
<property name="url" value="jdbc:oracle:thin:#localhost:9999:TEST"/>
<property name="username" value="test"/>
<property name="password" value="test"/>
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>
<!-- spring based scanning for entity classes-->
<property name="packagesToScan" value="com.orange.aurore.model.entity"/>
<property name="persistenceUnitName" value="msPersistenceUnit" />
</bean>
<bean id="controllerService" class="...controller.impl.ControllerServiceImpl">
<property name="entityManager" ref="entityManagerFactory" />
<property name="dataSource" ref="dataSource"/>
</bean>
and :
<bean id="dataSource2" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.OracleDriver"/>
<property name="url" value="jdbc:oracle:thin:#localhost:9999:TEST"/>
<property name="username" value="test2"/>
<property name="password" value="test2"/>
</bean>
<bean id="entityManagerFactory2" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource2"/>
<property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>
<!-- spring based scanning for entity classes-->
<property name="packagesToScan" value="com.orange.aurore.model.entity"/>
<property name="persistenceUnitName" value="msPersistenceUnit2" />
</bean>
<bean id="controllerService2" class="...controller.impl.ControllerServiceImpl">
<property name="entityManager" ref="entityManagerFactory2" />
<property name="dataSource" ref="dataSource2"/>
</bean>
and in java code :
public void setEntityManager(final HibernateEntityManagerFactory entityManager) {
final RepositoryFactorySupport factorySupport = new JpaRepositoryFactory(entityManager.createEntityManager());
controlRepository = factorySupport.getRepository(ObjControlRepository.class);
Thanks you for your help.

It was a stupide mistake I juste add primary="true" for one of my two configuration.

Change the default datasource in spring batch

I want to use mysql database in spring batch application. Where should I keep my XML file with the details of datasource.
currently i have kept the env-context.xml in src/main/resources/META-INF/batch/override/manager
Content of env-context.xml:
<!-- connect to database -->
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/demo_db" />
<property name="username" value="testuser" />
<property name="password" value="12345" />
</bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

The common approach is to put this kind of configuration parameters into a properties file in order to externalize them as they will change from one environment to another.
It can be done as next:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:datasource.properties</value>
</property>
</bean>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${datasource.driver}" />
<property name="url" value="${datasource.url}" />
<property name="username" value="${datasource.username}" />
<property name="password" value="${datasource.password}" />
</bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
Then you put your file datasource.properties into the classpath, this file will have a content of type:
datasource.driver=com.mysql.jdbc.Driver
datasource.url=jdbc:mysql://localhost:3306/demo_db
datasource.username=testuser
datasource.password=12345

How to instatiate datasource from list of datasources?

I am new to spring.
I have multiple databases but any given time one database is open depending on which database user select. So I have a bean defined as below. So my question is how do I instantiate the datasource user select and use it in my class if I use below given bean. Any ideas would be appreciated.
<bean id="dataSources" class="java.util.TreeMap">
<constructor-arg>
<map>
<entry key="dp1www" value-ref="dataSourceDp1www" />
<entry key="dp2www" value-ref="dataSourceDp2www" />
<entry key="sp0www" value-ref="dataSourceSp0www" />
<entry key="sp1www" value-ref="dataSourceSp1www" />
<entry key="sp2www" value-ref="dataSourceSp2www" />
</map>
</constructor-arg>
</bean>
<bean id="dataSourceDp1www" class="org.apache.commons.dbcp.BasicDataSource">
<property name="url" value="jdbc:oracle:thin:#sf1-hab-ppb-ww.home.com:1525/dp1www1.home.com" />
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="username" value="select" />
<property name="password" value="######" />
</bean>
<bean id="dataSourceDp2www" class="org.apache.commons.dbcp.BasicDataSource">
<property name="url" value="jdbc:oracle:thin:#sf1-hbl-ppb-ww.home.com:1525/dp2www1.home.com" />
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="username" value="select" />
<property name="password" value="######" />
</bean>
<bean id="dataSourceSp0www" class="org.apache.commons.dbcp.BasicDataSource">
<property name="url" value="jdbc:oracle:thin:#sf1-hbl-ppb-ww.home.com:1525/sp0www1.home.com" />
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="username" value="select" />
<property name="password" value="######" />
</bean>
<bean id="dataSourceSp1www" class="org.apache.commons.dbcp.BasicDataSource">
<property name="url" value="jdbc:oracle:thin:#sf1-hab-ppb-ww.home.com:1525/sp1www1.home.com" />
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="username" value="select" />
<property name="password" value="######" />
</bean>

You can just use #Autowired annotation to inject TreeMap instance:
#Autowired
private TreeMap<String, DataSource> dataSources;
....
DataSource dataSource = dataSources.get("dp1www");
or you can directly inject specific data source without even creating TreeMap
#Autowired
private DataSource dataSourceDp1www;

how to replace jdbctemplate with jpa in jobrepository of springbatch

hi actually springbatch jobrepository uses jdbctemplate for the CRUD operations of springbatch metadata
and my requirement is to replace jdbctemplate with jpa and do the crud operations...
the actual configuration of springbatch job repository is as follows...
can anyone kindly help regarding this issue...i searched alot but got nothing......
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3307/test" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<!-- create job-meta tables automatically -->
<jdbc:initialize-database data-source="jobRepository-dataSource">
<jdbc:script location="classpath:/org/springframework/batch/core/schema-drop-mysql.sql" />
<jdbc:script location="classpath:/org/springframework/batch/core/schema-mysql.sql" />
</jdbc:initialize-database>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
lazy-init="true">
<property name="dataSource" ref="jobRepository-dataSource" />
</bean>
<bean id="jobRepository-transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
lazy-init="true">
<property name="dataSource" ref="jobRepository-dataSource" />
</bean>
<bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean" >
<property name="dataSource" ref="jobRepository-dataSource" />
<property name="transactionManager" ref="jobRepository-transactionManager" />
<property name="databaseType" value="mysql" />
<property name="isolationLevelForCreate" value="ISOLATION_DEFAULT" />
<property name="tablePrefix" value="batch_" />
</bean>
<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
</bean>
<bean id="jobExplorer"
class="org.springframework.batch.core.explore.support.JobExplorerFactoryBean"
p:dataSource-ref="jobRepository-dataSource" p:tablePrefix="batch_" />
<bean id="jobRegistryBeanPostProcessor"
class="org.springframework.batch.core.configuration.support.JobRegistryBeanPostProcessor">
<property name="jobRegistry" ref="jobRegistry" />
</bean>
<bean id="jobRegistry" class="org.springframework.batch.core.configuration.support.MapJobRegistry" />
<bean id="jobOperator" class="org.springframework.batch.core.launch.support.SimpleJobOperator">
<property name="jobRepository" ref="jobRepository" />
<property name="jobLauncher" ref="jobLauncher" />
<property name="jobRegistry" ref="jobRegistry" />
<property name="jobExplorer" ref="jobExplorer" />
</bean>