IOC = inversion of control DI = dependency injection

Jetty.xml IOC/DI has long been available even before spring sprung (springframework)
Almost anything you can do programmatically can be done on jetty.xml, so long as it
does not require loops.

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

Equivalent to the "new" in java.
Instantiates an object.

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

Calls an object method.
The method could be an instance method or a static method.

Arg

An argument of a method or a constructor.
Used in conjunction with #New and #Call.

SystemProperty

Gets the value of a system property.

Array

An object array.

Item

An element of an array.
Used only in conjuction with #Array