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64 changes: 64 additions & 0 deletions
64
...main/kotlin/com/backgu/amaker/infra/redis/chat/repository/ChatPipelinedQueryRepository.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package com.backgu.amaker.infra.redis.chat.repository | ||
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|
||
| import com.backgu.amaker.infra.redis.chat.data.ChatWithUserCache | ||
| import com.fasterxml.jackson.databind.ObjectMapper | ||
| import org.springframework.data.redis.core.RedisTemplate | ||
| import org.springframework.data.redis.core.script.RedisScript | ||
| import org.springframework.stereotype.Repository | ||
|
|
||
| @Repository | ||
| class ChatPipelinedQueryRepository( | ||
| private val redisChatTemplate: RedisTemplate<String, String>, | ||
| private val timeObjectMapper: ObjectMapper, | ||
| ) { | ||
| companion object { | ||
| const val PREFIX = "chatRoom:" | ||
|
|
||
| fun key(chatRoomId: Long) = "$PREFIX$chatRoomId" | ||
|
|
||
| const val AFTER_CHAT_SCRIPT = | ||
| """ | ||
| local key = KEYS[1] | ||
| local cursor = tonumber(ARGV[1]) | ||
| local count = tonumber(ARGV[2]) | ||
| local firstResult = redis.call('ZRANGE', key, 0, 0, 'WITHSCORES') | ||
| if #firstResult > 0 then | ||
| local firstChat = firstResult[1] | ||
| local firstScore = tonumber(firstResult[2]) -- 첫 번째 요소의 score 값을 가져옴 | ||
| if firstScore > cursor then | ||
| local result = redis.call('ZRANGEBYSCORE', key, cursor + 1, math.huge, 'LIMIT', 0, count) | ||
| if #result > 0 then | ||
| return table.concat(result, ",") | ||
| else | ||
| return "" | ||
| end | ||
| else | ||
| return firstChat | ||
| end | ||
| else | ||
| return nil | ||
| end | ||
| """ | ||
| } | ||
|
|
||
| fun findAfterChats( | ||
| chatRoomId: Long, | ||
| cursor: Long, | ||
| count: Int, | ||
| ): List<ChatWithUserCache<*>>? { | ||
| val result: List<String> = | ||
| redisChatTemplate.execute( | ||
| RedisScript.of(AFTER_CHAT_SCRIPT.trimIndent(), List::class.java as Class<List<String>>), | ||
| listOf(key(chatRoomId)), | ||
| cursor.toString(), | ||
| count.toString(), | ||
| ) | ||
|
|
||
| return result.map { chat -> | ||
| timeObjectMapper.readValue(chat, ChatWithUserCache::class.java) | ||
| } | ||
| } | ||
| } |