jakub holý

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Spring: Make an Externally Created Object Available to Beans in applicationContext.xml

2011-10-11Languages

If your Spring beans need access to an object that is not created by Spring itself, you can "inject" it into the context by using a static parent context and registering the object with it. Beans can then reference it just as if it was defined in the application context file.

Java: Configure ApplicationContext with an Injected Bean


import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.context.support.StaticApplicationContext;

Object externalyDefinedBean = ...; GenericApplicationContext parentContext = new StaticApplicationContext(); parentContext.getBeanFactory().registerSingleton("injectedBean", externalyDefinedBean); parentContext.refresh(); // seems to be required sometimes

ApplicationContext context = new FileSystemXmlApplicationContext(springConfigs, parentContext);

Xml: Make Use of It


<bean id="springBean" class="your.SpringBeanType">
   <!-- Note: The injectedBean is defined outside of Spring config -->
   <property name="someProperty" ref="injectedBean" />
</bean>


Voila!