Aufgabensteller:Prof. Bernd Brügge Ph.D. Prof. Gudrun Klinker Ph.D. Supervisor:Dipl.-Inf. Christian...
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Transcript of Aufgabensteller:Prof. Bernd Brügge Ph.D. Prof. Gudrun Klinker Ph.D. Supervisor:Dipl.-Inf. Christian...
April 2004
Dipl.-Inf. Christian Sandor,
Dipl.-Inf. Asa MacWilliams
Supervisor:
Prof. Bernd Brügge Ph.D.
Prof. Gudrun Klinker Ph.D.
Aufgabensteller:
Markus Michael GeipelPresenter:
SEP
Run-time Development and Configuration
of Dynamic Service Networks
April 2004 <Markus Michael Geipel> 2/20
Overview
• Motivation• DIVE• Problem Statement• CAR• Requirements• Solutions• Results• Future Work
April 2004 <Markus Michael Geipel> 3/20
Motivation
• Data flows are the heart of an AR-System
• DWARF is thus a cooperating service network
• Via DIVE this network can be visualized
• But: It can not be configured or developed
April 2004 <Markus Michael Geipel> 4/20
DIVE• DWARF Interactive Visualisation Environment• Implemented by Daniel Pustka (SEP)
Service Descriptions
Service Manager
Query Service Descriptions
April 2004 <Markus Michael Geipel> 5/20
• DIVE should not only be a monitoring tool, but a tool to actively support the development of dynamic service networks.
• Further more DIVE has to be convenient to use in means of stability, speed and GUI.
Problem Statement
April 2004 <Markus Michael Geipel> 6/20
CAR
• CAR acts as a source of new requirements and ideas that originate from the everyday practice with DWARF.
• Further more CAR explores authoring techniques in AR. Thus CAR’s field of application intersects with DIVE’s field of application.
April 2004 <Markus Michael Geipel> 7/20
Requirements Analysis: The Requirements
• Functional– Changing the network structure
• Changing Attributes and Predicates• Connecting Services• Starting Services
– Making Changes Persistent– Configuring Services – Looking at the network structure
• List View of the Services• Grouped View of the Services
• Non Functional (excerpt)– Performance: Suitable for CAR, Update in average within 5
seconds. – Reliability: Running several hours in productive work.
April 2004 <Markus Michael Geipel> 8/20
More GUI, more Views• New Icons• New Color Scheme• New List View
April 2004 <Markus Michael Geipel> 13/20
Configurators
Configuration
Graphical User Interface Information
Information
April 2004 <Markus Michael Geipel> 14/20
Configurators
Computer X Computer Y
DIVE
Service to be configured
Configurator Service
1) read ServiceDescription
ServiceDescription for the Configurator
ServiceManager
4) read ServiceDescription
2) Create ServiceDescription
3) start
ServiceDescription of the Service to be configured
ServiceManager
5) connect
April 2004 <Markus Michael Geipel> 15/20
Update Speed• Update Speed
– How fast can DIVE’s internal representation of the DWARF service network be synchronized with the information residing in each individual ServiceManager
• Reorganization of the Update Routine– Don’t throw away the system model– Set the stage for further improvement
• Version Counting– Only services that actually changed need to be updated
• Multithreaded Update– The main part of the update time is network roundtrip delay– Every ServiceManager runs on a different host and is thus independent.– Thus every ServiceManager can easily be queried in parallel
• Reduce the subjective Update Speed– As soon as new information is available, show it.
April 2004 <Markus Michael Geipel> 16/20
Results: Update Speed
A: 2 Hosts, 13 active + 128 inactive sercvicesB: 3 Hosts, 24 active + 192 inactive sercvices C: 4 Hosts, 35 active + 256 inactive sercvices
April 2004 <Markus Michael Geipel> 17/20
Results: Survey
1
2
3
4
5
Higher
Upd
ate
Speed
Chang
e Pre
dica
tes
Chang
e Attr
ibut
es
Conne
ct S
ervic
es
Config
ure
Servic
es
Save
XML
Descr
iption
List V
iew
Start
Servic
es
Color S
chem
e fo
r Ser
vices
Group
ed S
ervic
es
Diplomanden SEP-Students AverageU
tility
April 2004 <Markus Michael Geipel> 18/20
Future Work: Near Future• Refactoring
DwarfSystemModel (Design Patterns)
• Refactoring the Model Views (complete MVC)
• Polishing up the UI– Ergonomic design (like
Eclipse or Visual Studio)– Other graphical notations (e.
g. UML like)– Minimap and zoom
April 2004 <Markus Michael Geipel> 19/20
Future Work: Far Future• DIVE in 3D or even in AR?
– Mockup by Michael Riedl
April 2004 <Markus Michael Geipel> 22/20
Services in DWARF• Services have Needs and Abilities, which have types
• Abilities have Attributes, Needs have Predicates. • These can be set at runtime. • One service’s Needs depend on other services’ Abilities.• Distributed CORBA-based Middleware establishes connections for communication
between services (management, lookup, connection)