@startuml
package com.iluwatar.bulkhead {
  interface RemoteService {
    + call(request : String) : String {abstract}
  }
  class Bulkhead {
    - name : String
    - maxConcurrentCalls : int
    - maxQueueSize : int
    - executor : ThreadPoolExecutor
    - rejectedCalls : AtomicLong
    + Bulkhead(name : String, maxConcurrentCalls : int, maxQueueSize : int)
    + submit(task : Callable<T>) : Future<T>
    + getName() : String
    + getMaxConcurrentCalls() : int
    + getMaxQueueSize() : int
    + getActiveCalls() : int
    + getQueuedCalls() : int
    + getRejectedCalls() : long
    + shutdown() : void
    + close() : void
  }
  class BulkheadFullException {
    - bulkheadName : String
    + BulkheadFullException(bulkheadName : String)
    + getBulkheadName() : String
  }
  class PaymentService {
    - latency : Duration
    + PaymentService(latency : Duration)
    + call(request : String) : String
  }
  class InventoryService {
    + InventoryService()
    + call(request : String) : String
  }
  class App {
    - PAYMENT_LATENCY : Duration {static}
    - WAIT_TIMEOUT : Duration {static}
    + App()
    + main(args : String[]) : void {static}
  }
}
Bulkhead ..|> AutoCloseable
BulkheadFullException --|> RuntimeException
PaymentService ..|> RemoteService
InventoryService ..|> RemoteService
Bulkhead ..> BulkheadFullException
App ..> Bulkhead
App ..> PaymentService
App ..> InventoryService
App ..> BulkheadFullException
@enduml