Is there a way in Spring to discover a
“plugin”-JAR from the classpath,
and load its applicationContext.xml dynamicaly?
Is there a way in Spring to discover a plugin-JAR from the classpath, and
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Is there a way in Spring to discover a
“plugin”-JAR from the classpath,
and load its applicationContext.xml dynamicaly?
I have achieved a plugin-like system with Spring by following this approach:
Each plug-in must contain a spring-context file with a specific name and package prefix (for example, com.example.myApp.whatever containing plugin.xml, or applicationContext.xml if you prefer).
For the plug-in to be detected in the classpath, the host application should dynamically import all the context files contributed by any jar following the previos scheme. This is achieved with a wildcard-based import in spring config:
Provided that each plug-in defines beans of a known interface (e.g., MyInterface). The host application can define a property of type List <MyInterface> and define the bean as autowire=”byType” in order to retrieve all the beans of the MyInterfaceType in a list.