Http:// Tango & Passerelle - Tango meeting at Synchrotron Soleil June 16, 2004

http://www.isencia.be

Tango & Passerelle -

Tango meeting at Synchrotron Soleil

June 16, 2004

Synchrotron Soleil – Passerelle Workshop 2© iSencia 2004

Topics

iSencia Belgium

Passerelle at Soleil - a solution component in the Tango environment

Concepts

Benefits

Sample assemblies

Extending Passerelle


iSencia Belgium


Who we are

Technology-driven services company with extensive experience in

Distributed systems

Object Oriented Programming

Web technology

for building

High-throughput robust transactional systems

Data- and process-flow management systems in services and industries


Who we are

Part of iSencia group : offices in Barcelona and Gent

Total of approx. 20 IT professionals, with experience of OO and Java on several platforms: MS Windows, Unix flavours, iSeries

Sample customers:

automation, production planning (Brooks-PRI, Spiromatic, AutoJet)

pharma (e.g. Abott)

Belgacom, Belgian mail “De Post”

Financial institutions (via big consultancies)

…


What we do

Expert Services

Consulting

Solution delivery based on robust frameworks and reusable components

Passerelle : Suite for Model Driven Solution Assembly

Target application domains

Pervasive event and alert handling

Automated process control

Automated data flow

Unified Event/Message handling

Maestro : Leading production planning tool

Main application domain: high-end automation of bulk processing


Passerelle at Soleil


Tango solution packages

Device

Device

Bus Logiciel TANGO

(moteur…)

Hardware

(E/S…)

Hardware

Environnements Utilisateurs:MATLAB,

IGOR, python,

Bindings

SupervisionConfiguration

Archivage

Séquenceur:

PASSERELLE


Passerelle Concepts


Passerelle conceptsTarget solution domains

Batch processing in business information systemsProcess sequencing and scheduling

Event-based data-flow solutions

Business activity monitoring

Alert management

...

Basic principles

A solution is constructed as an assembly model of interconnected actor components

Each actor has a single, well-defined function/responsibility

Actors are available in libraries for several categories

Assemblies are described in XML files

These XML files can be deployed to several execution options


Passerelle concepts

Interactors

•Applets•Beans

Admin

Framework APIs

Solutionassemblymodels

ExecutorsActors

IDE

• IDE

• engine

• scheduler

• cmd line

•Sources

•Sinks

•Transform•...

Unified Messaging Scheduler Db access ...


Passerelle actorsActors are Java components, each with a clear task, e.g.

Read a file

Drive a Tango motor device

Update a database

Generate a trigger pulse according to some schedule

Select alternative continuations based on some condition

... Actors are maintained in category libraries, e.g.

Sources

Sinks

Filters

Flow control

...They communicate via input and output ports (similar to digital electronics components)Their activity & life-cycle is controlled by a model Director


Passerelle conceptsExecution of solution models

The model Director defines the RULES for the model execution

Sequential or parallel execution

Actor communication via method-calls, message queues, ...

...

An Executor defines HOW/WHEN the model is executed

Inside the IDE

From the command prompt

By delivering a new model in a designated folder for the executor service

According to a periodic or non-periodic schedule as defined by the Passerelle scheduler


Passerelle IDE

Passerelle contains an IDE to design and test new assemblies


Assembling a solution

Design models (IDE)

Pick existing actors & identify gaps

Use scriptable actors to fill gaps, or develop new actors

Configure actors (rules, source/sink identification, …)

Test

Deploy models

Models can be deployed to different executors ( Engine, Scheduler, Command Line )

Admin

Web-based admin console


Passerelle Benefits


Passerelle BenefitsDesigned for reuse

Pipe-and-filter architecture

Promotes clear definition of component responsibilities

Promotes low coupling of component implementations

Actor development framework

Graphical solution assembly

Clear split between actor development and solution assembly

Ready for different solution domains

Based on proven open-source frameworks&tools

Ptolemy (Univ.of Berkeley)

Netbeans (Sun)

Jboss

Tomcat, Log4J,... (Apache)


Samples


“Hello World”


Simple file-driven motor positioning


... with some timing condition


... or a plot of the sequence





Options

Extend actors (simple)

Write JavaScript or Jython scripts for existing scriptable actor

Develop new Java-based actors

Investigate and reuse actors from Ptolemy

Extend directors (complex)

When new types of pipes are needed between actors

When new execution rules are needed

To support completely different application domains

Cfr Ptolemy domains


Conclusion


Conclusion

Passerelle is an open suite for component-based solutions for data- and process-flow

Current goal at Soleil: process sequencing

Easy to integrate in a distributed IT infrastructure, such as the Tango environment

Will be part of a well-controlled Soleil open-source community

Easy to extend/customize

Based on proven Java technology

Documents

Http:// Tango & Passerelle - Tango meeting at Synchrotron Soleil June 16, 2004