CCSDS Service Management

ESA/ESOC UM Prototype

20 April 2009

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Contents

• ?

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Prototyping Approach

• Test implementation of specification• Prototype, not pre-operational software

– Not explicitly designed for re-use

– But a lot of it could be

• Oriented to “message” view of interaction

• Longer-term SM integration in ESA systems still to be determined => not possible to anticipate

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Technologies Used

• Eclipse– Eclipse Modelling Framework (EMF, XSD)

• Generate data mapping XML Schema Java classes

– Rich Client Platform (RCP)

– Web Service Toolkit (WST)

• Tomcat web server• Apache AXIS

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Deployment – Web Services Comm.

CM

UM

External Web Server

(Apache, reverse proxy)

Tomcat,AXIS

generated SOAP server

UM-PAApp

SSH

Java RMI

SOAP/HTTP

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UM-PA Architecture

SMEngine

GeneratedModel

OperationHistory

UI

GeneratedEditor

XML Load, Serialise

UI

RMI

Web Service

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Experience: EMF with XSD

• Positive– Schema -> Model + Editor

– Very easy (fairly basic) editor

– Tweaks e.g. class names: add ecore attributes to schema

– Easily extensible / customised

– Regenerate without losing customisation

• Limitations– Based on Ecore model (similar to UML)

• Not fully congruent with Schema – e.g. choice• Validation not as rigorous as Schema

– Minor UI oddities e.g. default values

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Discussion

Comments & Questions ?

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