java-design-patterns/data-bus/etc/data-bus.urm.puml

@startuml
package com.iluwatar.databus {
  class AbstractDataType {
    - dataBus : DataBus
    + AbstractDataType()
    + getDataBus() : DataBus
    + setDataBus(dataBus : DataBus)
  }
  ~class App {
    - log : Logger {static}
    ~ App()
    + main(args : String[]) {static}
  }
  class DataBus {
    - INSTANCE : DataBus {static}
    - listeners : Set<Member>
    + DataBus()
    + getInstance() : DataBus {static}
    + publish(event : DataType)
    + subscribe(member : Member)
    + unsubscribe(member : Member)
  }
  interface DataType {
    + getDataBus() : DataBus {abstract}
    + setDataBus(DataBus) {abstract}
  }
  interface Member {
    + accept(DataType) {abstract}
  }
}
package com.iluwatar.databus.data {
  class MessageData {
    - message : String
    + MessageData(message : String)
    + getMessage() : String
    + of(message : String) : DataType {static}
  }
  class StartingData {
    - when : LocalDateTime
    + StartingData(when : LocalDateTime)
    + getWhen() : LocalDateTime
    + of(when : LocalDateTime) : DataType {static}
  }
  class StoppingData {
    - when : LocalDateTime
    + StoppingData(when : LocalDateTime)
    + getWhen() : LocalDateTime
    + of(when : LocalDateTime) : DataType {static}
  }
}
package com.iluwatar.databus.members {
  class CounterMember {
    - log : Logger {static}
    - name : String
    + CounterMember(name : String)
    + accept(data : DataType)
    - handleEvent(data : MessageData)
  }
  class StatusMember {
    - id : int
    - log : Logger {static}
    + StatusMember(id : int)
    + accept(data : DataType)
    - handleEvent(data : StartingData)
    - handleEvent(data : StoppingData)
  }
}
AbstractDataType -->  "-dataBus" DataBus
DataBus -->  "-INSTANCE" DataBus
DataBus -->  "-listeners" Member
AbstractDataType ..|> DataType 
MessageData --|> AbstractDataType 
StartingData --|> AbstractDataType 
StoppingData --|> AbstractDataType 
CounterMember ..|> Member 
StatusMember ..|> Member 
@enduml