com.noheltcj.rxcommon.emitters.HotEmitter.kt Maven / Gradle / Ivy

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package com.noheltcj.rxcommon.emitters

import com.noheltcj.rxcommon.exceptions.UndeliverableEmissionException
import com.noheltcj.rxcommon.observers.Observer

open class HotEmitter : Emitter {
  private val activeObservers = mutableListOf>()

  override var isDisposed = false
    protected set
  override var isCompleted = false
    protected set
  override var isTerminated = false
    protected set

  override fun addObserver(observer: Observer) {
    if (!isDisposed)
      activeObservers.add(observer)
  }

  override fun removeObserver(observer: Observer) {
    activeObservers.remove(observer)
  }

  override fun next(value: E) {
    if (!isDisposed) {
      activeObservers.forEach { it.onNext(value) }
    } else {
      throw UndeliverableEmissionException(value)
    }
  }

  override fun terminate(throwable: Throwable) {
    if (!isDisposed) {
      isTerminated = true
      activeObservers.forEach { it.onError(throwable) }
      dispose()
    }
  }

  override fun complete() {
    if (!isDisposed) {
      isCompleted = true
      activeObservers.forEach { it.onComplete() }
      dispose()
    }
  }

  private fun dispose() {
    isDisposed = true
  }
}