Joram Barrez and Tijs Rademakers, Principal Software Engineer at Flowable present the current state of (Flowable)things. It was presented at the Flowfest 2018 in Barcelona, Spain

1. Flowable: State of Things
Joram Barrez & Tijs Rademakers

2. Flowable: The Project
• Open Source
• Apache 2 license
• Fork of Activiti
• BPMN/CMMN/DMN engines
• Active forums and contributions
• Core dev funded by Flowable (the company)
• Last release 6.4.0
• https://github.com/flowable
• https://flowable.org/
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3. 3

4. Some pretty graphs
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Github Stars
Forum

5. Some Interesting Numbers
• In the last six months
• 2 releases
• 236 PR’s
• 29 contributors
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6. Some Nice Words
• https://www.openhub.net/p/flowable 6

7. Our Goals
• Performance
• Scalability
• Integrate easily into any project/any technology
• Developer Power
• Truly adaptive and dynamic
• Build & deploy however you want
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8. Flowable Engines in a nutshell
Models
Deployed
- Standalone (e.g REST)
- Embedded in any Java env
(with mimimal resources needed)
Engines APIs
Apps
Process (bpmn)
Case (cmmn)
Rules (dmn)
- Web apps
- Mobile
- Machine to Machine
- Open standards
- Pluggability & extensibility
Apps
Process (bpmn)
Case (cmmn)
Rules (mn)

9. Evolution of our own architecture
DMN
Entity Link
JobTaskVariable
Content
BPMN
FormIDM
CMMN
DMN
BPMN
DMN Form
FormAppBPMN
REST
API
Engine
Service
Spring
Boot
starters
OSGI
LDAP
Spring
CDI
Identity Link
Camel
Integration
Persistence
TaskJob Variable
IDM
…
CMMN
CMMN
App
App

10. Let’s have a look at
the focus of the latest releases
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11. BPMNCMMN
DMN
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Engines
+ App engine
Form engine
Content engine

12. Performance & Scalability
• https://blog.flowable.org/2018/03/05/flowable-6-3-0-performance-benchmark/
• https://blog.flowable.org/2018/03/13/async-history-performance-benchmark/
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13. Integration
• Keep focus on being a lightweight embeddable framework
• Spring Boot (talk later today)
• Compatible release: 1 month after 2.0 release
• On master: typically same day or max a few days
• Spring 5
• JDK compatibility
• Alternatives to relational db (MongoDB talk later today)
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14. Async
History

15. Truly Dynamic & Adaptive
• State change logic
• Adding/removing instances from multi-instance
• Move from any state to any other state in a running process
instance
• Process Instance Migration (talk later today)
• Both heavily using the v6 architecture changes
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16. Refresher: V6 Architecture
• Internal data structures are predictable
• At any point during execution, we can calculate exactly the past
and future state of the execution tree
• Crucial for state change/migration in every situation
• Optimizations beyond the v5 architecture
• Behaviors are self-contained (no PVM/cleaner model)
• Every new feature means more permutations. Less permutations
means quicker new features & less bugs
• More details in the “Process instance migration” talk later today
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17. Thank you!