[#28] feat: 비동기 방식 SimpleAsyncTaskExecutor에서 TaskExecutor로 변경

src/main/java/com/ku/covigator/config/AsyncConfig.java

@@ -1,9 +1,33 @@
 package com.ku.covigator.config;
 
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
 
 @Configuration
 @EnableAsync
 public class AsyncConfig {
+
+    private static final int CORE_POOL_SIZE = 30;
+    private static final int MAX_POOL_SIZE = 50;
+    private static final int QUEUE_CAPACITY = 100;
+    private static final boolean WAIT_TASK_COMPLETE = true;
+    private static final int AWAIT_TERMINATION_SECONDS = 30;
+
+    @Bean(name = "threadPoolTaskExecutor")
+    public Executor threadPoolTaskExecutor() {
+        ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
+        taskExecutor.setCorePoolSize(CORE_POOL_SIZE);
+        taskExecutor.setMaxPoolSize(MAX_POOL_SIZE);
+        taskExecutor.setQueueCapacity(QUEUE_CAPACITY);
+        taskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+        taskExecutor.setWaitForTasksToCompleteOnShutdown(WAIT_TASK_COMPLETE);
+        taskExecutor.setAwaitTerminationSeconds(AWAIT_TERMINATION_SECONDS);
+        taskExecutor.initialize();
+        return taskExecutor;
+    }
 }