package ${basePackage}.config;

import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.lang.Nullable;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.lang.reflect.Method;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

@Configuration
@EnableAsync
public class ThreadPoolConfig implements AsyncConfigurer {
    private ThreadPoolTaskExecutor executor;

    private int corePoolSize = 10;//线程池维护线程的最少数量

    private int maxPoolSize = 30;//线程池维护线程的最大数量

    private int queueCapacity = 8; //缓存队列

    private int keepAlive = 60;//允许的空闲时间

    @Nullable
    @Override
    public Executor getAsyncExecutor() {
        executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(corePoolSize);
        executor.setMaxPoolSize(maxPoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setThreadNamePrefix("mqExecutor-");
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy()); //对拒绝task的处理策略
        executor.setKeepAliveSeconds(keepAlive);
        executor.initialize();
        return executor;
    }


    @Nullable
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new AsyncUncaughtExceptionHandler() {

            @Override
            public void handleUncaughtException(Throwable throwable, Method method, Object... objects) {
                System.out.println("-------------》》》捕获线程异常信息");
            }
        };
    }

}