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IOC = inversion of control |
Jetty.xml IOC/DI has long been available even before spring sprung 
(springframework)
Anything you can do programmatically can be done on jetty.xml.
The entire functionality is covered by two classes:
1. org.mortbay.xml.XmlConfiguration
2. org.mortbay.xml.XmlParser
Attributes
id
This simply means that you want to reference an object for later use.
Jetty persists the object in a java.util.HashMap<String,Object>
Most common use cases:
class
The value is the fully qualified class name of an object.
Used in three tags:
1. #Configure
2. #New
3. #Call
name
Generally used to specify the name of the property/method of an object.
Also used to specify the name of a System property
Used on the ff tags:
1. #Set
2. #Get
3. #Call
4. #SystemProperty
type
Used to specify the type of an #Array tag.
The value is the fully qualified class name of an object.
Used only in one tag:
1. #Array
default
Used to specify the default value of a System property if it does not exist.
Used only in one tag:
1. #SystemProperty
Tags
Configure
The root tag.
The value of the "class" attribute is the target for configuration.
New
Set
Sets an object property. One argument
Used in conjunction with #Configure, #New, #Ref, #Call.
Get
Returns the object's property.
The object I'm referring to the wrapper tag.
E.g #Configure, #Ref, #New ... examples below
Call
Arg
Used in conjunction with #New and #Call.
SystemProperty
Array
Item
Used only in conjuction with #Array