Towards Dynamic Adaptation within an ESB-based Service Infrastructure Layer

Transcription

1 Twards Dynamic Adaptatin within an ESB-based Service Infrastructure Layer Laura Gnzález and Raúl Ruggia MONA+, 1st December, 2010 Uruguay Institut de Cmputación Facultad de Ingeniería Universidad de la República de Uruguay Prgrama de Desarrll de las Ciencias Básicas

2 Agenda Mtivatin ESB Backgrund Slutin Apprach Addressing SOA Adaptatin Dynamic Adaptatin in ESB Cnclusins Future Wrk Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 2

3 Mtivatin Self-adaptatin in SOA is increasingly required ESB recgnized middleware fr supprting the SOA infrastructure layer Our main gal: T enable dynamic adaptatin in ESB-based service infrastructures t supprt self-adaptatin in SOA Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 3

4 ESB Essentials An ESB is a standards-based integratin platfrm which cmbines messaging, web services, data transfrmatin, and intelligent ruting (Chappell 2004) Applicatins (r services) cmmunicate thrugh the ESB by sending messages Mediatin flws transfrmatin, ruting, mnitring, etc Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 4

5 ESB Mediatin Patterns Intermediate Ruting Patterns determine message path based n different factrs Transfrmatin Patterns deal with runtime transfrmatin f messages Others Cache: Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 5

6 Slutin Apprach ESBs prvide varius built-in mediatin features, hwever: Their main purpse is t address integratin / cmmunicatin issues They generally require static cnfiguratin They are usually cnfigured in a per service basis S-Cube Prject Adaptatin as a crss-layer issue in SOA Definitin f an Adaptatin and Mnitring Framewrk Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 6

7 Slutin Apprach Our apprach cnsists in: Analyzing and specifying hw SOA adaptatin requirements can be addressed with ESB capabilties Enabling the dynamic executin f the identified adaptatins Prviding adaptatins which can be re-used by different services Cnsidering S-Cube definitins regarding SOA adaptatin Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 7

8 Addressing SOA Adaptatin T analyze hw adaptatin requirements can be addressed in an ESB, we use cncepts defined within the S-Cube A&M Framewrk There is a difference with the Mnitred expected state, functinality Events r envirnment. ( e.g. Respnse time degradatin) trigger detect Mnitring Mechanisms Mechanisms t check if the actual situatin is the expected ne. (e.g. Mnitr ing respnse times) There is a need f changing the actual situatin (e.g. Optimize respnse time) Adaptatin Requirements achieve Pssible ways t address the requirements. Adaptatin (e.g. change Strategies prvider) realize Adaptatin Facilities prvided by Mechanisms the underlying applicatin r platfrm. (e.g. discvery/rebinding) Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 8

9 Addressing SOA Adaptatin Handling Web Service Interface Changes trigger Mnitred Events Mnitring Mechanisms WSDL Mnitring Interface change UDDI v3 subscriptin detect Adaptatin Requirements Handle interface change achieve Adaptatin Strategies Adaptatin Mechanisms Mdify service requests Transfrm service requests Invke equivalent service Rute service requests realize an unmdified peratin is invked Remve a parameter integratin expert the mdified peratin is invked Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 9

10 Addressing SOA Adaptatin Reducing Respnse Time trigger Mnitred Events Respnse time greater than X Adaptatin Requirements Reduce respnse time Mnitring Mechanisms ESB built-in tls Alerts detect achieve Adaptatin Strategies Adaptatin Mechanisms Use prcessed infrmatin Use a cache service Invke an equivalent service Rute service requests realize nt between 9:00 and 11:00 Respnse time prblems frm integratin 9:00 t 11:00 expert between 9:00 and 11:00 Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 10

11 Addressing SOA Adaptatin Other Adaptatin Requirements Handling service cntract changes Operatins, plicies, data mdel Optimizing quality f service values Availability, perfrmance, service saturatin Handling Faults Handling invalid input / utput Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 11

12 Dynamic Adaptatin in ESB The general idea is t intercep all messages and attach them an adaptatin path when an adaptatin is required ADAPTATION GATEWAY SR TR - SR Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 12

13 Dynamic Adaptatin in ESB Adaptatin and Mnitring Engine Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 13

14 Cnclusins We presented hw an ESB can be leveraged t address cmmn SOA adaptatin requirements We als prpsed an apprach t execute these adaptatins dynamically The slutin apprach is based n: cmmnly supprted ESB patterns (likely t be applied in different ESB prducts) S-Cube definitins n SOA adaptatin Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 14

15 Future Wrk Analyze hw ther SOA adaptatin requirements can be addressed by ESBs Incrprate ther ESB mechanisms t perfrm adaptatins Decisin mechanisms Cnsider ther SOA layers Implementatin and evaluatin f the prpsed apprach Currently being implemented with JBssESB Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 15

16 Questins? Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 16

17 Cntact Infrmatin Labratri de Integración de Sistemas Institut de Cmputación - Facultad de Ingeniería Universidad de la República de Uruguay Juli Herrera y Reissig 565, 5t Pis, C.P , Mntevide, Uruguay. (598) ext. 116 lins@fing.edu.uy Laura Gnzález lauragn@fing.edu.uy Raúl Ruggia ruggia@fing.edu.uy Institut de Cmputación Facultad de Ingeniería UdelaR Mntevide, Uruguay 17