Get a field of a bean in Spring
Case
I have to instanciate an object of type FooDao. The only constructor available is FooDao(Connection connection).
On another hand, I have a bean of type BasicDataSource. From this BasicDataSource, I can get a Connection, through the call of BasicDataSource.getConnection().
Question: how to instanciate a bean of type FooDao in Spring?
Solution
The idea, to retrieve a field member of a bean, is to use the attributes factory-bean and factory-method, from which we will get a new bean.
Use the following Spring context file:
<bean id="myBasicDataSource" class="org.apache.commons.dbcp.BasicDataSource">
<!-- complete ... -->
</bean>
<bean id="connection" factory-bean="myBasicDataSource" factory-method="getConnection"
scope="singleton"/>
<bean id="myFooDao" class="com.my.company.FooDao">
<constructor-arg ref="connection"/>
</bean>
Many thanks to David Chau from SFEIR for his help in this issue!