Enterprise Architecture

Master-Copy PrinciplePeter Norrhall

Information and business logic in several systemsSystem A System B

System C

Information

Business Logic

SOA Silos

Master per domain/functionality in the different systems

Master-copy replication

Master-copy replication

MasterCopy

Publish-subscribe

Master

Copy

Common information

System A System B

System C

Common information

E-Commerce ERP

CRM

Master-master replication of common information

E-Commerce ERP

CRM

ESB

Business logic

Shared LibrariesSystem A System B

System C

COM

jar

Business logicOne System To Rule Them All

Copy

MasterCopy

Business logic

Master

Copy Master

Copy

Replication of declarative business logic

Master

Copy Master

Copy

Proxy against cemented business logicSystem A System B

System C

Enterprise Service BusSystem A System B

System C

ESB