Distributed OSGi - OSGi DevCon - Eclipsecon 2011

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his talk combines an introduction to the OSGi Remote Services and Remote Service Admin specifications with some compelling examples that illustrate their use and flexibility. It will also take a look at topics that these specifications have left deliberately open, such as topology management, i.e. service wire-up policy, and discuss the potential for innovation in these areas.

Technologie

Distributed the Way
Transforming OSGi
the World Runs Applications

Robert Dunne
robert.dunne@paremus.com www.paremus.com

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Overview

• OSGi Remote Services basics
• What OSGi Remote Services Admin (RSA) adds
• What’s a Topology Manager?
• What’s still missing?

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Bundles share services via the registry

Transforming the Way
the World Runs Applications

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Add remoting at service registry level

Transforming the Way
the World Runs Applications

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Remote Services: Distribution Providers

• Monitor Service Properties
‣ Export matching services

• Monitor Service Listeners (With hooks)
‣ Import on demand (maybe!)

• There can be multiple, independent DPs

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Remote Service Properties
• Configurations (remoting stacks)
- configuration specific properties

• Interfaces
• Intents (from SCA)
‣ QoS & Non-Functional
‣ Can be
- Built in to services
- Required by services
- Required by admins

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Remote Services Open issues

• Open Issues
‣ How are services discovered
‣ When should they be imported
‣ How can system builders control remoting

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Remote Services Admin (RSA)

• API for Import and Export
• Endpoint Descriptions and Listeners

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

RSA import and export

Transforming the Way
the World Runs Applications

Imports and Exports are now explicit
Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

RSA Discovery with EndpointDescriptions

• EndpointDescriptions
‣ Just Properties

• Where do they come from?
‣ Created when you Export
‣ Can be embedded in bundles
‣ Discovered via an EndpointListener
- Or any way you like

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

RSA: Discovery with EndpointDescriptions

Transforming the Way
the World Runs Applications

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

What’s a Topology Manager?

• RSA for remoting mechanics
• Topology managers for Remoting Policy and Goals
‣ Just a Concept/Role
‣ No API

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Alternative Topologies

Independent
Pipelines
Transforming the Way
the World Runs Applications
Round Robin
Pipelines

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Federated Topology Management

Transforming the Way
the World Runs Applications

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Open Issue: Topology Descriptions

• How to express topology
‣ Description -> Federated TM -> Distributed System
‣ Lots of room for innovation
‣ Too early to standardise

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Open Issue: Distributed Provisioning

• RSA controls the wireup
• But how do the services get deployed

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

RSA Implementations

• Eclipse ECF
• Apache CXF
• Paremus Nimble

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Where we fit in

OSGi Distribution (like Ubuntu is a Linux distribution)
Transforming the Way Ships with OSGi Remote Service Admin

the World Runs Applications
Builds on Nimble
A Distributed Model Driven OSGi runtime
Provisioning and Topology descriptions

Paremus www.paremus.com March 2011
Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Making Modularity Manageable™

Thank you for coming

http://www.paremus.com/nimble

Robert Dunne
robert.dunne@paremus.com
Paremus www.paremus.com Feb 2010
Copyright © 2009 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

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Distributed OSGi - OSGi DevCon - Eclipsecon 2011

1. Distributed the Way Transforming OSGi the World Runs Applications Robert Dunne robert.dunne@paremus.com www.paremus.com Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

2. Overview • OSGi Remote Services basics • What OSGi Remote Services Admin (RSA) adds • What’s a Topology Manager? • What’s still missing? Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

3. Bundles share services via the registry Transforming the Way the World Runs Applications Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

4. Add remoting at service registry level Transforming the Way the World Runs Applications Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

5. Remote Services: Distribution Providers • Monitor Service Properties ‣ Export matching services • Monitor Service Listeners (With hooks) ‣ Import on demand (maybe!) • There can be multiple, independent DPs Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

6. Remote Service Properties • Configurations (remoting stacks) - configuration specific properties • Interfaces • Intents (from SCA) ‣ QoS & Non-Functional ‣ Can be - Built in to services - Required by services - Required by admins Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

7. Remote Services Open issues • Open Issues ‣ How are services discovered ‣ When should they be imported ‣ How can system builders control remoting Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

8. Remote Services Admin (RSA) • API for Import and Export • Endpoint Descriptions and Listeners Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

9. RSA import and export Transforming the Way the World Runs Applications Imports and Exports are now explicit Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

10. RSA Discovery with EndpointDescriptions • EndpointDescriptions ‣ Just Properties • Where do they come from? ‣ Created when you Export ‣ Can be embedded in bundles ‣ Discovered via an EndpointListener - Or any way you like Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

11. RSA: Discovery with EndpointDescriptions Transforming the Way the World Runs Applications Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

12. What’s a Topology Manager? • RSA for remoting mechanics • Topology managers for Remoting Policy and Goals ‣ Just a Concept/Role ‣ No API Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

13. Alternative Topologies Independent Pipelines Transforming the Way the World Runs Applications Round Robin Pipelines Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

14. Federated Topology Management Transforming the Way the World Runs Applications Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

15. Open Issue: Topology Descriptions • How to express topology ‣ Description -> Federated TM -> Distributed System ‣ Lots of room for innovation ‣ Too early to standardise Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

16. Open Issue: Distributed Provisioning • RSA controls the wireup • But how do the services get deployed Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

17. RSA Implementations • Eclipse ECF • Apache CXF • Paremus Nimble Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

18. Where we fit in OSGi Distribution (like Ubuntu is a Linux distribution) Transforming the Way Ships with OSGi Remote Service Admin the World Runs Applications Builds on Nimble A Distributed Model Driven OSGi runtime Provisioning and Topology descriptions Paremus www.paremus.com March 2011 Copyright © 2011 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

19. Making Modularity Manageable™ Thank you for coming http://www.paremus.com/nimble Robert Dunne robert.dunne@paremus.com Paremus www.paremus.com Feb 2010 Copyright © 2009 Paremus Ltd. May not be reproduced by any means without express permission. All rights reserved.

Distributed OSGi - OSGi DevCon - Eclipsecon 2011

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