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

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

Jakub Holý user avatar by
Jakub Holý
·
Oct. 13, 11 · Interview
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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>

 Viola!

 

From http://theholyjava.wordpress.com/2011/10/11/spring-make-an-externally-created-object-available-to-beans-in-applicationcontext-xml/

Spring Framework Object (computer science)

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Related

  • How to Transform Any Type of Java Bean With BULL
  • Anemic Domain Model in Typical Spring Projects (Part 1)
  • Anemic Domain Model in Typical Spring Projects (Part 2)
  • Dependency Injection in Spring

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