message driven architecture in grails
DESCRIPTION
Slides from my GGX 2013 talk. http://skillsmatter.com/podcast/home/message-driven-architecture-in-grails Code here: https://github.com/danveloper/ggx-2013-mdaTRANSCRIPT
Message Driven Architecture in GrailsDaniel Woods
London, Dec 2013
QUICK OVERVIEW: SPRING INTEGRATION
Message Driven Architecture in Grails
GATEWAY
Message Driven Architecture in Grails
Gateway Service Interface
SomewhereMessage Channel
gateway.request(obj)
HANDLER CHAIN
Message Driven Architecture in Grails
Message Channel Handler
Handler
Handler
Handler
Gateway Service Interface
APPROACH TO MESSAGE DRIVEN ARCHITECTURE IN GRAILS
Message Driven Architecture in Grails
MESSAGE DRIVEN ARCHITECTURE IS NOT ALWAYS THE SAME THING AS DISTRIBUTED ARCHITECTURE
Message Driven Architecture in Grails
- BUILD THE SKELETON OF THE APPLICATION AS A MESSAGING PIPELINE
Message Driven Architecture in Grails
Message Driven Architecture in Grails
Function #1Room Search
Function #2Booking
Message Driven Architecture in Grails
• Need to find hotels with rooms that don’t have bookings for the date range requested• RoomSearch
• Need to hand off available rooms to be priced appropriately for the user• RatingEngine
• Need to store the rate that we have have generated for the user, to recall during booking
Function #1Room Search
FUNCTION #1 – ROOM SEARCH
Message Driven Architecture in Grails
Message Channel
Room Search
RatingEngine
PublishedRoomService
Gateway Service Interface Provides:
List<Room>
Provides:List<PublishedRoom>
DB
Message Driven Architecture in Grails
• Need to retrieved the room and the stored rate
• Need to validate room is still available• RoomSearch
• Re-rate the room to ensure no major discrepancy• RatingEngine
• Create the booking
Function #2Booking
FUNCTION #2 – BOOKING
Message Driven Architecture in Grails
Message Channel
RatingEngine
Booking Service
Gateway Service Interface
Provides:PublishedRoom
PublishedRoomService
Provides:PublishedRoom
NotifyHotel
DBProvides:BookingEmailService
Pass-Thru:Booking
MetricsService
PIPELINE WITH WORKFLOW GROUPS
Message Driven Architecture in Grails
Message Channel
AppPipeline
SearchRequest Handler
BookingRequest Handler
Message Channel Room Search
RatingEngine
PublishedRoomService
Provides:List<Room>
Provides:List<Publishe
dRoom>
DB
Message Channel
RatingEngine
Booking Service
Provides:PublishedRoom
PublishedRoomService
Provides:PublishedRoom
NotifyHotel
DB
Provides:Booking
EmailService
Pass-Thru:Booking
MetricsService
Message Router
WHY GO MESSAGE DRIVEN?
Message Driven Architecture in Grails
THANK YOU
Message Driven Architecture in Grails