OCE is an OSGi-based Platform As A Service plaform. OSGi makes easy for implementing Enterprise App Store.

1. 2014 한국소프트웨어아키텍트대회
OSGi와 SOA 기반의 클라우드
플랫폼 아키텍처
OCE 의장 장진영
Rick.jang@opence.org

2. PaaS Mission
vs
• Ready-made architecture
• All-in-One
• One-click integration

3. PaaS Innovation
Competitors
Provider who using PaaS
Install Integrate DevelopDesign
plug Choose
apps
Modeling & Develop
with Open APIs
Optimize
for operation
DONE!

4. PaaS: has modularity issues
• Multiple Services • Mature SaaS Level
Forrester’s PaaS Reference Model SaaS Maturity Level

5. Java for Enterprise PaaS
• Mission critical
• Transactional
• Legacy Integration
i.e. J2EE 8’s Multi-tenancy
and PaaS Spec
• Optimized for SaaS app
development (B2C)
• Cloud automation

6. Java Module System:
ClassLoader
i.e. Tomcat’s ClassLoader

7. OSGi: Standard module system
for Java
• Standard
• Simplifies the complex classloader
issues by encapsulating-‘Bundle’
• Spring DM and blueprint
• IBM J9 and Java jigsaw roadmap

8. Platforms using OSGi
• Eclipse plugin Marketplace
• Atlassian plugin Marketplace...

9. Platforms using OSGi
• Apache ServiceMix WAS
• Glassfish WAS
• JOnAS WAS

10. OSGi for PaaS
• More modular, so share more (at library
level)
• More dynamic, so easily automated
• Provides standard J2EE framework
including JAX-RS, JPA and Spring with
whiteboard pattern.

11. Sharing Level
• Hypervisor-based PaaS vs. OSGi-based PaaS
• Share at library level
Share more, More cheap offering, More Co
mpetitive in the market !
Share less, More easy & Secure !

12. OSGi based PaaS approaches
• Apache Ace and Amdatu
• Eclipse Gyrex
• Vaadin Arvue Master
• WSO2’s Stratos
• OCE Garuda
 Initiative from Korea!

13. Build Time Run-Time
Artifacts
BPMN
(*.process)
Visual Mashup
BPMN
Process Modeler
Cloud IDE
Vaadin Designer
JAVA
Composite
UI
OSGi
Bundle
packager
App
Bundle
Vaadin UI
Calls
Stay In SCM
(e.g.Git)
Automated
By
CI tool
(Jenkins)
Package
Master
HA
Proxy
App repo.
Netra
App Bundles
(*.jar)
VM Template
Instance
PaaS RT
App1
OSGi Container
…
Node1
App2
PaaS RT
App1
OSGi Container
Node2
PaaS RT
OSGi Container
Image
Load info
forward
message
Upload to
App Store
Tools
An OSGi-based PaaS Architecture
(OCE Garuda)
….
instanciation

14. Exposing Platform Services
using OSGi and RESTful APIs
• Using Apache-CXF by white-board pattern
OSGi Container
BPMN
Web 2.0 UI
JAX-RS
JPA
Servlet
Spring
Process Mgmt.
Integration
Persistence
Web Service
AOP / Security
uEngine
Vaadin
Eclipse Link (Gemini)
Jetty
Apache Wink (CXF)
Spring DM
Service Standard Implementation
Application

15. Whiteboard Pattern

16. Extender Pattern

17. Services: RESTful Service
• Filter by annotation: @Path
@Path("saveCustomer")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.TEXT_PLAIN)
public String saveCustomer(Customer customer) {
}

18. Services: Vaadin UI Service
@Title("CRM Web Application")
public class CustomerUI extends UI {
….
}
• Filtered by Class Type: com.vaadin.ui.UI

19. Services: Multi-tenancy
• Filtered by Bundle Header: X-Multi-tenant
• Inherent isolated class-loader
• Database isolation by JPA’s @Discriminator
annotation
• Tenant information injection by
ThreadLocal
• Also BPM engine provides tenant-specific
Business process and logics(rule)

20. Cloud IDE: Auto OSGi Bundling
by Maven
 설치 없는 빠른 개발
 BPM 플랫폼과
연동되어 빠른
‘프로세스 앱’ 개발
 Import from Cloud
- Web Service Import
- Database
 개발된 결과물 (앱)은
OSGi번들 형식의
표준적 방식으로
패키징됨
 J2EE Compliant
▼ Manageable Object Types
▼ Database Objects
 Accessing Component Store by
code assist.
Cf. Google Apps Scripts

21. Cloud IDE: Vaadin UI Platform
UI Design in Vaadin
wysiwyg designer
Source editing in
Cloud IDE

22. Cloud IDE: Process Modeling by
BPMN
 업무 전문가를 위한
실행가능 프로세스
언어 – BPMN
 GUI기반 비즈니스 룰
정의
 웹서비스 통합 (*CSB)
 비즈니스 폼
 데이터 매핑
• DB 쿼리 자동화
• SQL 툴

23. Components
(onOSGi)
Services
(Exposed by
Apache-wink
)
서비스사용자서비스제공자
Tenant
Database
SNS Portal
BAM
Dashboard
OpenSocial
Mashups
Services
Process
(onBPM)
Portal
Enterprise
Apps
Process Apps
ERP
Services
서비스
(RESTful)
컴포지
트
서비스
(Cubrid)
DB
Cluster
(FastCa
t)
Search
CAS SSO / Apache DS EAM
Codi SNS
ER
P
EC
M
CR
M..
Vaadin
Custom UIs
JDBC
Contents
Repository
Service
Customer
Services
Custom
Composite
Service
SNS
Services
Search
Services
Reusing Sharing the SOA Level-8:
Dynamically Re-configurable
App
Regi
stry
(App
Store)

24. Example App: Process based
Sales Force Automation
Process Portal CRM App (Vaadin)
SFA Process
RESTful Web Services

25. Related works:
Process-based
OS sharing
(Linux Container)
Hypervisor-based
Infra Sharing
Gear (?)-based
Sharing

26. Conclusion
• OSGi makes implementing Enterprise
PaaS easier by :
– Modularity when to integrate existing J2EE
technologies and legacy systems.
– Dynamicity for provisioning S/W
components and services.
– Service Oriented Architecture.

27. Future works: IoT Platform
• BPMN-based IoT modeling
• OSGi - SW provisioning on
devices
• OCE’s Flamingo – analyze Big
data from Things
Flamingo Big data
Analyzer

28. References
• Paul Bakkar, Bert Ertman, Building
Modular Cloud Apps with OSGi,
O’REILLEY
• Open Cloud Engine – Garuda Project,
http://www.opence.org
• Eclipse Gyrex Project,
http://www.eclipse.org/gyrex/
• Apache ACE Project,
https://ace.apache.org/