Enabling Value Added Services in the Event-based Internet
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The document discusses the concept of a social event-based internet and the role of complex event processing (CEP) in enabling real-time, value-added services through dynamic and flexible event handling. It outlines use cases such as crisis management and socially-aware smartphone applications, emphasizing the importance of adapting services based on situational awareness and event subscriptions. Additionally, the document presents frameworks and architectures to support these functionalities in distributed service environments.
Enabling Value Added Services in the Event-based Internet
- 1. Enabling Value Added Services in the Event-based Internet Dr. Yiannis Verginadis Insitute of Communication and Computer Systems National Technical University of Athens 1 Towards the Social Event-based Internet of Services, 17 October 2012
- 2. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) Service Adaptation Recommender (SAR) Conclusion 2
- 3. Real-time Real-time has become one of the crucial characteristics of modern applications and is completely changing the game in the data processing Data is on the move o Find results immediately or never one should be informed as soon as his/her flight has a delay Information searches for the relevant consumers o instead of searching for information, it should find us Inform me immediately if my luggage is not onboard and we are about to start (and not after landing) Google search vs. Twitter followers 3 Attribution of Slide, Thanks to: Opher Etzion, IBM
- 4. What time is Real-time Twitter world record, 29. Aug. 2011 Beyoncé's pregnancy announcement during the MTV VMA show resulted in 8,868 tweets per second. The previous record was during the final of FIFA Women's World Cup, between Japan and the United States. That resulted in 7,196 tweets per second Financial market Nanoseconds trading eHealth: Remote patient monitoring One semantic signal in 5 sec Energy: Smart meters One reading in 15 min Real-time is the business real-time or near real-time 4
- 5. CEP - Complex Event Processing An event is something that has happened, or is contemplated as having happened (Etzion & Niblett 2010) Event processing is a form of computing that performs operations on events CEP is an enabling technology that supports on the fly, (business-) real-time processing of huge event streams CEP is about a timely recognition of the situations of interest and corresponding reaction A complex event pattern describes a situation of interest Pattern detection is one of the notable functions of event processing Event Patterns Attribution of Slide, 5 Thanks to: Opher Etzion, IBM
- 6. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) Service Adaptation Recommender (SAR) Conclusion 6
- 7. Motivating example PLAY Paul is a businessman who has been flying from Paris to New York. He used the entertainment service on board, but hasn’t finished watching the movie before the landing. Two hours later he is entering his room in the downtown hotel he booked earlier and wow: the room entertainment service is ready to PLAY the movie Paul was watching in the plane – of course only the unfinished part. 7
- 8. Vision To develop and validate an elastic and reliable architecture for dynamic and complex, event- driven interaction in large highly distributed and heterogeneous service systems. Such an architecture will enable ubiquitous exchange of information between heterogeneous services, providing the possibilities to adapt and personalize their execution, resulting in situational-driven adaptivity 8
- 9. Big picture 1 2 service system A local events context SENSING Event space 1 (service domain A) service B events AFFECTING new local event context complex events COMBINING global Event space 2 (domain A) Event space 3 (service domain B) context 9
- 10. Use cases The first use case is related to the Crisis Management domain (nuclear accident), which shows the advantage of our platform by increasing situational awareness in a complex crisis situation. The second use case Socially-aware Smartphone is related to enabling relevant social contacts through mobile devices, by efficient combining real-time and past social-network related events 10
- 11. Conceptual Architecture QoS for Event Processing (ELA - Event Level Highly elastic EP Agreement) „Endless“ P2P storage Management of Complex situations 11 Massively distributed PubSub
- 12. Current status Play Portal: demo.play-project.eu RDF-based events Semantic Event Storage EP-SPARQL2.0 as the query language o Allows combining real-time and historical events Many sources connected to the Portal o Sensor events Cosm (Pachube events from Solar Panels) o Social media events Twitter („microsoft“), Facebook („jeans“) o Personal events SmartPhone events 12
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- 14. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) Service Adaptation Recommender (SAR) Conclusion 14
- 15. Motivation Not everything can be captured at design time regarding system’s behavior but we can predefine the Goals to be pursued and achieved Unexpected or non-ordinary situations must be identified from streams of events exchanged in SBA environment they are usually not considered at design-time Identified situations; they update and enrich application context Selection of (re)Actions to the unexpected situations at runtime exploiting the current application context information A Mechanism for Dynamic Event Subscriptions is needed Recommender services for dynamic subscriptions will enable how a service in the distributed EDA will "decide” which (complex) event to subscribe to. 15
- 16. Situation Action Networks (SANs) SAN is a Goal-directed hierarchical modeling approach that targets automatic search for new goals when specific circumstances, i.e. situational and contextual settings, arise and adjust active capability in order to satisfy the currently active goals. In goals-directed modeling, goals are typically refined into sub- goals that elaborate how the goal is achieved, creating in such way hierarchical structure Step by step “activation” of Goals 16 Hierarchical Structure
- 17. Event Subscriptions Recommender (ESR) Event Subscription Recommender (ESR): “significant situations”: interesting situations referring to undertakes the task of providing event subscription with the states of a system along recommendations based on serviceenvironmentandcreate its context that event improvement opportunities semantics. critical situations referring to the recognizes significant situations in ordermitigating a risk or hazard. need for to recommend event subscriptions to new event sources and complex events. ESR provides added value to services by enabling them to subscribe: to the “right events” at the “right time” and for the appropriate duration, reducing the cost and network traffic. 17
- 19. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) o Marine Scenario o Socially-aware SmartPhone Scenario Service Adaptation Recommender (SAR) Conclusion 19
- 20. Marine Scenario – AIS Hub (1/2) The International Maritime Organization (IMO) requires all vessels to carry an AIS (Automatic Identification System) transponder on board, which transmits their position, speed and course, among some other static information, such as vessel’s name, dimensions and voyage details. A vast amount of real time events are available from portals (e.g. http://www.aishub.net/ ) connected to automatic identification systems (AIS) that contain important vessel information worldwide. 20
- 21. AIS Adapter 21
- 22. AISHub Scenario Speeding in Windy Conditions Small Boats in Proximity 22
- 23. Safety in high Speed Crafts SAN 23
- 25. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) o Marine Scenario o Socially-aware SmartPhone Scenario Service Adaptation Recommender (SAR) Conclusion 25
- 26. “Communicate with a Friend” SAN SIAFU Simulator 26
- 27. “Communicate with a Friend” SAN OR it can be handled by ESR (on This Recommendation user’s behalf). This will result (UcTelcoEsrRecom) can be into a number of notifications exploited by another interesting to the user smartphone app This Recommendation will be accepted or rejected by the user (UcTelcoAnswer Event) 27
- 28. Socially-aware SmartPhone Contextualized Latitude „Inform me WHEN there is in proximity a friend of mine, who twitted in the last two days about something that is interesting for me „ Or any other relevant activity in social networks is related to that friend (e.g. Facebook wall update) 28
- 29. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) Service Adaptation Recommender (SAR) Conclusion 29
- 30. Approach We aim to suggest workflow or services’ configuration adaptations in order to overcome problems or achieve superior performance based on significant detected situations Specifically, for detected situations, we need to be able to define adaptation points, that is points in a service flow that need to be adapted as a reaction to a certain situation, and adaptation actions, indicating what to adapt and how, such as removal of a problematic service, replacement of an underperforming service, addition of a new service 30
- 31. Adaptation Approach Every time the execution reaches an activity or event node, just before its execution, the BPMN2.0 engine can exchange notifications with the situation reasoning engine through a bridging component in order to check whether the specific node is a join-point The bridging component should be able to suspend the execution of that particular process instance and find the advice that should be weaved in the business process, using the reasoning service After the successful adaptation the normal process execution should resume just after the join-point 31
- 32. A Simple Process Adaptation Scenario Bridging component queries situation reasoning 32
- 33. Adaptation Types BEFORE adaptation type AFTER adaptation type AROUND adaptation type REPLACE adaptation type BYPASS adaptation type REPLACE – AROUND composite adaptation AFTER – BYPASS composite adaptation 33
- 34. Framework Architecture Situation reasoning engine that handles the execution of SANs SAN repository SAN execution component Event management component and Context component. (Patiniotakis et al. 2012) Adaptation Manager Monitors the execution of process instances, detects whether execution comes to an active joint point, checks the associated pointcuts and activates the corresponding advices Aspects Repository Stores the definitions of aspects along with their comprising parts BPMN 2.0 engine Worktoken Open Source Engine 34
- 35. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) Service Adaptation Recommender (SAR) o Nuclear Crisis Management Scenario Conclusion 35
- 37. Illustrative Scenario This process is composed of several activities necessary during emergency situations in nuclear power plants Main actor is the “Representative of the national authority” responsible for assessing the current situation and deciding emergency actions e.g., evacuate area, distribute iodine capsules etc. 37
- 38. Adaptations in SMP If ‘study advice’ task takes more than 30 min then weave Advice 2 Advice 3 is implemented if the actor has already received the expert’s advice but has not started to study it yet, while new alerts have been detected If new alerts received before the actor has asked for any advice from the experts yet then analyze new alerts. 38
- 39. Agenda Introduction Complex Event Processing PLAY: An Event Marketplace Value Added Services Event Subscriptions Recommender (ESR) Service Adaptation Recommender (SAR) Conclusion 39
- 40. Conclusion PLAY is a global events agreegator and processor, based on three technologies: Semantics for interopeability Cloud computing for scalability Event Processing for real-time/situational awareness Current development is focused on making the platform stable and more performant 40
- 41. Follow Us Twitter: @play_fp7 RSS: http://news.play-project.eu/ Web: http://www.play-project.eu/ 41
- 42. Enabling Value Added Services in the Event-based Internet Questions? 42 Towards the Social Event-based Internet of Services, 17 October 2012