fix: AI 프롬프트 조회 커넥션 조기 반환

src/main/kotlin/com/didit/adapter/integration/ai/FeedbackPrompts.kt

@@ -7,13 +7,15 @@ import com.didit.domain.shared.Job
 import org.slf4j.LoggerFactory
 import org.springframework.core.io.ClassPathResource
 import org.springframework.stereotype.Component
+import org.springframework.transaction.annotation.Transactional
 
 @Component
 class FeedbackPrompts(
     private val promptRepository: PromptRepository,
 ) {
     private val logger = LoggerFactory.getLogger(FeedbackPrompts::class.java)
 
+    @Transactional(readOnly = true)
     fun buildDeepQuestionPrompt(
         job: Job?,
         answers: List<String>,
@@ -25,6 +27,7 @@ class FeedbackPrompts(
             .replace("{{q3}}", answers.getOrElse(2) { "" })
     }
 
+    @Transactional(readOnly = true)
     fun buildSummaryPrompt(
         job: Job?,
         allAnswers: List<String>,

src/test/kotlin/com/didit/adapter/integration/ai/FeedbackPromptsTransactionTest.kt

@@ -0,0 +1,86 @@
+package com.didit.adapter.integration.ai
+
+import com.didit.application.prompt.required.PromptRepository
+import com.didit.domain.prompt.Prompt
+import com.didit.domain.prompt.PromptJobType
+import com.didit.domain.prompt.PromptType
+import com.didit.domain.shared.Job
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.mockito.kotlin.mock
+import org.mockito.kotlin.whenever
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.jdbc.datasource.DataSourceTransactionManager
+import org.springframework.jdbc.datasource.DriverManagerDataSource
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig
+import org.springframework.transaction.PlatformTransactionManager
+import org.springframework.transaction.annotation.EnableTransactionManagement
+import org.springframework.transaction.support.TransactionSynchronizationManager
+import javax.sql.DataSource
+
+@SpringJUnitConfig(FeedbackPromptsTransactionTest.Config::class)
+class FeedbackPromptsTransactionTest {
+    @Autowired
+    private lateinit var feedbackPrompts: FeedbackPrompts
+
+    @Autowired
+    private lateinit var promptRepository: PromptRepository
+
+    @Test
+    fun `buildSummaryPrompt - reads prompt in transaction and releases it before returning`() {
+        whenever(promptRepository.findByJobTypeAndPromptType(PromptJobType.DEVELOPER, PromptType.SUMMARY)).thenAnswer {
+            assertThat(TransactionSynchronizationManager.isActualTransactionActive()).isTrue()
+            Prompt(
+                jobType = PromptJobType.DEVELOPER,
+                promptType = PromptType.SUMMARY,
+                content = "{{q1}} {{q2}} {{q3}} {{q4}} {{deepQuestion}}",
+            )
+        }
+
+        val result = feedbackPrompts.buildSummaryPrompt(Job.DEVELOPER, listOf("1", "2", "3", "4"), "deep")
+
+        assertThat(result).isEqualTo("1 2 3 4 deep")
+        assertThat(TransactionSynchronizationManager.isActualTransactionActive()).isFalse()
+    }
+
+    @Test
+    fun `buildDeepQuestionPrompt - reads prompt in transaction and releases it before returning`() {
+        whenever(promptRepository.findByJobTypeAndPromptType(PromptJobType.DEVELOPER, PromptType.DEEP_QUESTION)).thenAnswer {
+            assertThat(TransactionSynchronizationManager.isActualTransactionActive()).isTrue()
+            Prompt(
+                jobType = PromptJobType.DEVELOPER,
+                promptType = PromptType.DEEP_QUESTION,
+                content = "{{q1}} {{q2}} {{q3}}",
+            )
+        }
+
+        val result = feedbackPrompts.buildDeepQuestionPrompt(Job.DEVELOPER, listOf("1", "2", "3"))
+
+        assertThat(result).isEqualTo("1 2 3")
+        assertThat(TransactionSynchronizationManager.isActualTransactionActive()).isFalse()
+    }
+
+    @Configuration
+    @EnableTransactionManagement
+    class Config {
+        @Bean
+        fun promptRepository(): PromptRepository = mock()
+
+        @Bean
+        fun feedbackPrompts(promptRepository: PromptRepository) = FeedbackPrompts(promptRepository)
+
+        @Bean
+        fun dataSource(): DataSource =
+            DriverManagerDataSource().apply {
+                setDriverClassName("org.h2.Driver")
+                url = "jdbc:h2:mem:feedback-prompts-transaction-test;DB_CLOSE_DELAY=-1"
+                username = "sa"
+                password = ""
+            }
+
+        @Bean
+        fun transactionManager(dataSource: DataSource): PlatformTransactionManager = DataSourceTransactionManager(dataSource)
+    }
+}