Canvas Item Support for End Workflow

[Michaelpalacce]

Description

We need to add support for "End workflow" elements, they are used to define "ends" of the wf.

Example

Workflow ends can be one of two kinds:

Normal Ends:

  <workflow-item name="item6" business-status="Test Business status" type="end" end-mode="0">
    <in-binding/>
    <position y="50.0" x="400.0"/>
  </workflow-item>

Exception ends:

  <workflow-item name="item5" business-status="Bad" throw-bind-name="errorBind" type="end" end-mode="1">
    <in-binding/>
    <position y="210.0" x="320.0"/>
  </workflow-item>

Notes

• We need to support both kinds of end
• business-status is completely optional, so it should be the same for us.
• end-mode signifies if it's good or bad. 1 means exception, 0 means normal end.
• type is always end
• throw-bind-name is the string variable that contains the error. Treat this as a normal attribute/input/output
• There will always be a default "end" that is targetable by passing "end" to the target, this will stay as is and will always be the last element that is generated.

[akantchev]

Implementation: #348