change same server db based on client login in spring 4 mvc - mysql

Question

I have mysql server in linux server. It contains 5 database for 5 different clients. so far, I have created 5 tomcat instances to deploy 5 war based on client and accessing database from servelet.xml file like below,
client1 instance war :
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/client1" />
<property name="username" value="rootuser" />
<property name="password" value="pswd" />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate" >
<constructor-arg ref="dataSource"/>
</bean>
client2 instance war :
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/client2" />
<property name="username" value="rootuser" />
<property name="password" value="pswd" />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate" >
<constructor-arg ref="dataSource"/>
</bean>
Config class :
public class JdbcRepository {
#Autowired
#Qualifier("jdbcTemplate")
protected JdbcTemplate jdbcTemplate;
#Autowired
#Qualifier("namedParameterJdbcTemplate")
protected NamedParameterJdbcTemplate namedParameterJdbcTemplate ;
#Autowired
#Qualifier("dataSource")
private DataSource dataSource; //mysqlSource;
public JdbcTemplate getJdbcTemplate() {
return jdbcTemplate;
}
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
return namedParameterJdbcTemplate;
}
public void setNamedParameterJdbcTemplate(NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
}
public DataSource getDataSource() {
return dataSource;
}
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public Long findMemberIdByUserName(String username) {
try{
String sql = "SELECT userLoginId FROM user WHERE userName = ?";
Long id = jdbcTemplate.queryForObject(sql, new Object[]{username}, Long.class);
return id;
}
catch(Exception e){
return 0l;
}
}
But now I want to create single instance and deploy single war for all clients and access the database based on user login. Like below,
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/{DBBasedOnLoginUser}" />
<property name="username" value="rootuser" />
<property name="password" value="pswd" />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate" >
<constructor-arg ref="dataSource"/>
</bean>
How to achieve this?

Answer 1

So, you want to communicate with different databases depending upon some condition.
Changing datasource connection url runtime
This is exactly what you need.