SOA Patterns > Service Governance Patterns > Proxy Capability
Proxy Capability (Erl)
How can a service subject to decomposition continue to support consumers affected by the decomposition?
If an established service needs to be decomposed into multiple services, its contract and its existing consumers can be impacted.
The original service contract is preserved, even if underlying capability logic is separated, by turning the established capability definition into a proxy.
Facade logic needs to be introduced to relay requests and responses between the proxy and newly located capabilities.
The practical solution provided by this pattern results in a measure of service denormalization.
Related Patterns in This Catalog
Contract Denormalization, Decomposed Capability, Decoupled Contract, Distributed Capability, Service Decomposition, Service Façade, Service Normalization, Service Refactoring, Termination Notification
Related Service-Oriented Computing Goals