package com.moon.server.config;

import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadPoolExecutor;

@Configuration
@SuppressWarnings("ALL")
public class ThreadPoolConfig {
    private final static int CORE_POOL_SIZE = 50;

    private final static int MAX_POOL_SIZE = 200;

    private final static int QUEUE_CAPACITY = 1000;

    private final static int KEEP_ALIVE_SECONDS = 300;

    @Bean(name = "threadPoolTaskExecutor")
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setMaxPoolSize(MAX_POOL_SIZE);
        executor.setCorePoolSize(CORE_POOL_SIZE);
        executor.setQueueCapacity(QUEUE_CAPACITY);
        executor.setKeepAliveSeconds(KEEP_ALIVE_SECONDS);
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());

        return executor;
    }

    @Bean(name = "scheduledExecutorService")
    protected ScheduledExecutorService scheduledExecutorService() {
        return new ScheduledThreadPoolExecutor(CORE_POOL_SIZE,
                new BasicThreadFactory.Builder().namingPattern("schedule-pool-%d").daemon(true).build(),
                new ThreadPoolExecutor.CallerRunsPolicy()) {
            @Override
            protected void afterExecute(Runnable r, Throwable t) {
                super.afterExecute(r, t);
            }
        };
    }
}