java-design-patterns/saga/etc/saga.urm.puml

@startuml
package com.iluwatar.saga.orchestration {
  class ChapterResult<K> {
    - state : State
    - value : K
    ~ ChapterResult<K>(value : K, state : State)
    + failure(val : K) : ChapterResult<K> {static}
    + getValue() : K
    + isSuccess() : boolean
    + success(val : K) : ChapterResult<K> {static}
  }
  enum State {
    + FAILURE {static}
    + SUCCESS {static}
    + valueOf(name : String) : State {static}
    + values() : State[] {static}
  }
  class FlyBookingService {
    + FlyBookingService()
    + getName() : String
  }
  class HotelBookingService {
    + HotelBookingService()
    + getName() : String
    + rollback(value : String) : ChapterResult<String>
  }
  interface OrchestrationChapter<K> {
    + getName() : String {abstract}
    + process(K) : ChapterResult<K> {abstract}
    + rollback(K) : ChapterResult<K> {abstract}
  }
  class OrderService {
    + OrderService()
    + getName() : String
  }
  class Saga {
    - chapters : List<Chapter>
    - Saga()
    + chapter(name : String) : Saga
    + create() : Saga {static}
    + get(idx : int) : Chapter
    + isPresent(idx : int) : boolean
  }
  class Chapter {
    ~ name : String
    + Chapter(name : String)
    + getName() : String
  }
  enum Result {
    + CRASHED {static}
    + FINISHED {static}
    + ROLLBACK {static}
    + valueOf(name : String) : Result {static}
    + values() : Result[] {static}
  }
  class SagaApplication {
    - LOGGER : Logger {static}
    + SagaApplication()
    + main(args : String[]) {static}
    - newSaga() : Saga {static}
    - serviceDiscovery() : ServiceDiscoveryService {static}
  }
  class SagaOrchestrator {
    - LOGGER : Logger {static}
    - saga : Saga
    - sd : ServiceDiscoveryService
    - state : CurrentState
    + SagaOrchestrator(saga : Saga, sd : ServiceDiscoveryService)
    + execute(value : K) : Result
  }
  -class CurrentState {
    ~ currentNumber : int
    ~ isForward : boolean
    ~ CurrentState()
    ~ back() : int
    ~ cleanUp()
    ~ current() : int
    ~ directionToBack()
    ~ forward() : int
    ~ isForward() : boolean
  }
  abstract class Service<K> {
    # LOGGER : Logger {static}
    + Service<K>()
    + getName() : String {abstract}
    + process(value : K) : ChapterResult<K>
    + rollback(value : K) : ChapterResult<K>
  }
  class ServiceDiscoveryService {
    - services : Map<String, OrchestrationChapter<?>>
    + ServiceDiscoveryService()
    + discover(orchestrationChapterService : OrchestrationChapter<?>) : ServiceDiscoveryService
    + find(service : String) : Optional<OrchestrationChapter<K>>
  }
  class WithdrawMoneyService {
    + WithdrawMoneyService()
    + getName() : String
    + process(value : String) : ChapterResult<String>
  }
}
package com.iluwatar.saga.choreography {
  interface ChoreographyChapter {
    + execute(Saga) : Saga {abstract}
    + getName() : String {abstract}
    + process(Saga) : Saga {abstract}
    + rollback(Saga) : Saga {abstract}
  }
  class FlyBookingService {
    + FlyBookingService(service : ServiceDiscoveryService)
    + getName() : String
  }
  class HotelBookingService {
    + HotelBookingService(service : ServiceDiscoveryService)
    + getName() : String
  }
  class OrderService {
    + OrderService(service : ServiceDiscoveryService)
    + getName() : String
  }
  class Saga {
    - chapters : List<Chapter>
    - finished : boolean
    - forward : boolean
    - pos : int
    - Saga()
    ~ back() : int
    + chapter(name : String) : Saga
    + create() : Saga {static}
    ~ forward() : int
    ~ getCurrent() : Chapter
    + getCurrentValue() : Object
    + getResult() : SagaResult
    ~ isCurrentSuccess() : boolean
    ~ isForward() : boolean
    ~ isPresent() : boolean
    + setCurrentStatus(result : ChapterResult)
    + setCurrentValue(value : Object)
    ~ setFinished(finished : boolean)
    + setInValue(value : Object) : Saga
    + toString() : String
  }
  class Chapter {
    - inValue : Object
    - name : String
    - result : ChapterResult
    + Chapter(name : String)
    + getInValue() : Object
    + getName() : String
    + isSuccess() : boolean
    + setInValue(object : Object)
    + setResult(result : ChapterResult)
  }
  enum ChapterResult {
    + INIT {static}
    + ROLLBACK {static}
    + SUCCESS {static}
    + valueOf(name : String) : ChapterResult {static}
    + values() : ChapterResult[] {static}
  }
  enum SagaResult {
    + FINISHED {static}
    + PROGRESS {static}
    + ROLLBACKED {static}
    + valueOf(name : String) : SagaResult {static}
    + values() : SagaResult[] {static}
  }
  class SagaApplication {
    - LOGGER : Logger {static}
    + SagaApplication()
    + main(args : String[]) {static}
    - newSaga(value : Object) : Saga {static}
    - serviceDiscovery() : ServiceDiscoveryService {static}
  }
  abstract class Service {
    # LOGGER : Logger {static}
    - sd : ServiceDiscoveryService
    + Service(service : ServiceDiscoveryService)
    + execute(saga : Saga) : Saga
    - isSagaFinished(saga : Saga) : boolean
    + process(saga : Saga) : Saga
    + rollback(saga : Saga) : Saga
    - serviceNotFoundException(chServiceName : String) : Supplier<RuntimeException>
  }
  class ServiceDiscoveryService {
    - services : Map<String, ChoreographyChapter>
    + ServiceDiscoveryService()
    + discover(chapterService : ChoreographyChapter) : ServiceDiscoveryService
    + find(service : String) : Optional<ChoreographyChapter>
    + findAny() : ChoreographyChapter
  }
  class WithdrawMoneyService {
    + WithdrawMoneyService(service : ServiceDiscoveryService)
    + getName() : String
    + process(saga : Saga) : Saga
  }
}
SagaOrchestrator -->  "-saga" Saga
SagaOrchestrator -->  "-sd" ServiceDiscoveryService
SagaOrchestrator -->  "-state" CurrentState
CurrentState ..+ SagaOrchestrator
Chapter ..+ Saga
Saga -->  "-chapters" Chapter
Chapter -->  "-result" ChapterResult
ChapterResult ..+ Saga
ChapterResult -->  "-state" State
State ..+ ChapterResult
Result ..+ Saga
Service -->  "-sd" ServiceDiscoveryService
SagaResult ..+ Saga
Saga -->  "-chapters" Chapter
Chapter ..+ Saga
FlyBookingService --|> Service 
HotelBookingService --|> Service 
OrderService --|> Service 
Service ..|> ChoreographyChapter 
WithdrawMoneyService --|> Service 
FlyBookingService --|> Service 
HotelBookingService --|> Service 
OrderService --|> Service 
Service ..|> OrchestrationChapter 
WithdrawMoneyService --|> Service 
@enduml