21⟩ What is a nested bean?
Scopes the bean within the bean that uses it. One less bean id in the set of bean names.
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Scopes the bean within the bean that uses it. One less bean id in the set of bean names.
Two examples:
☛ Nested or inner beans
☛ Configuration beans
5 scopes defined in Spring:
☛ Singleton
☛ Prototype
☛ Session - only valid in a Web application context
☛ Request - ditto
☛ Custom
It is created by Spring automatically, any setters are called on the factory then its getObject() method is called to allocate the actual bean.
Here are a few advantages:
☛Constructor
☛Mandatory
☛Mutable
☛Natural Java approach.
There are nested elements within each bean definition.
<constructor-arg… and <property…
A pattern (design) whereby collaborators are passed into an object from the outside - the object does not allocate them for itself.
Different collaborators for different environments can be injected - test, production, test-database, real database. This allows classes to be tested independent of its collaborators (makes it easy to pass in stub or mock objects).
Copy {WLHOME}/wlserver_**/server/lib/wlfullclient.jar file into {agent home}/opt/groovy-1.8.8/lib Then the Groovy script (that migrated from my JMX Java application) works.