[IDLE-000] Jitter 제거 및 지수 백오프로 롤백

Author: tgyuuAn

core/data/src/main/java/com/idle/data/repository/ChatRepositoryImpl.kt

@@ -12,7 +12,7 @@ import com.idle.network.model.chat.ReadMessageRequest
 import com.idle.network.model.chat.SendMessageRequest
 import com.idle.network.source.ChatDataSource
 import com.idle.network.util.MAX_RETRY_ATTEMPTS
-import com.idle.network.util.calculateEqualJitter
+import com.idle.network.util.calculateBackoffTime
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
@@ -207,7 +207,7 @@ class ChatRepositoryImpl @Inject constructor(
             }.retryWhen { cause, attempt ->
                 if (cause is IOException && attempt < MAX_RETRY_ATTEMPTS) {
                     connectWebSocket()
-                    delay(calculateEqualJitter(attempt.toInt()))
+                    delay(calculateBackoffTime(attempt.toInt()))
                     true
                 } else {
                     false

core/network/src/main/java/com/idle/network/source/ChatDataSource.kt

@@ -14,7 +14,7 @@ import com.idle.network.model.chat.SendMessageRequest
 import com.idle.network.serializer.ChatResponseSerializer
 import com.idle.network.util.MAX_RETRY_ATTEMPTS
 import com.idle.network.util.MAX_WAIT_TIME
-import com.idle.network.util.calculateEqualJitter
+import com.idle.network.util.calculateBackoffTime
 import com.idle.network.util.safeApiCall
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
@@ -87,7 +87,7 @@ class ChatDataSource @Inject constructor(
         connectionAttempts = 0
     }.recoverCatching { throwable ->
         if (connectionAttempts < MAX_RETRY_ATTEMPTS) {
-            val waitTime = minOf(calculateEqualJitter(connectionAttempts), MAX_WAIT_TIME)
+            val waitTime = minOf(calculateBackoffTime(connectionAttempts), MAX_WAIT_TIME)
             delay(waitTime)
             connectionAttempts++
             connectWebSocket().getOrThrow()

core/network/src/main/java/com/idle/network/util/BackOff.kt

@@ -2,15 +2,8 @@ package com.idle.network.util
 
 import com.idle.domain.model.CountDownTimer.Companion.TICK_INTERVAL
 import kotlin.math.pow
-import kotlin.random.Random
 
 const val MAX_RETRY_ATTEMPTS = 5
 const val MAX_WAIT_TIME = 10_000L
 
-fun calculateEqualJitter(attempt: Int): Long {
-    val baseDelay = calculateBackoffTime(attempt)
-    val randomJitter = Random.nextLong(0, baseDelay / 2 + 1)
-    return baseDelay / 2 + randomJitter
-}
-
-private fun calculateBackoffTime(attempt: Int): Long = (2.0.pow(attempt) * TICK_INTERVAL).toLong()
+fun calculateBackoffTime(attempt: Int): Long = (2.0.pow(attempt) * TICK_INTERVAL).toLong()