package com.finance.common.config;

import java.util.concurrent.ThreadPoolExecutor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

@EnableAsync
@Configuration
public class AsyncThreadPoolConfig {

    private static final int MAX_POOL_SIZE = 50;
    private static final int CORE_POOL_SIZE = 20;
    private static final int TASK_NUM = 200;
    private static final int ACTIVE_TIME = 60;

    @Bean("asyncTaskExecutor")
    public AsyncTaskExecutor asyncTaskExecutor() {
        ThreadPoolTaskExecutor asyncTaskExecutor = new ThreadPoolTaskExecutor();
        asyncTaskExecutor.setMaxPoolSize(MAX_POOL_SIZE);
        asyncTaskExecutor.setCorePoolSize(CORE_POOL_SIZE);
        asyncTaskExecutor.setQueueCapacity(TASK_NUM);
        asyncTaskExecutor.setKeepAliveSeconds(ACTIVE_TIME);
        asyncTaskExecutor.setThreadNamePrefix("async-task-thread-pool-");
        asyncTaskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        asyncTaskExecutor.initialize();
        return asyncTaskExecutor;
    }

}