java异步执行代码
法1
CompletableFuture.runAsync(() -> {
// 逻辑
});
法2
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
@Configuration
@Slf4j
public class ExecutorConfig {
/**
* 核心线程数(默认线程数)
*/
private static final int CORE_POOL_SIZE = 1;
/**
* 最大线程数
*/
private static final int MAX_POOL_SIZE = 10;
/**
* 允许线程空闲时间(单位:默认为秒)
*/
private static final int KEEPALIVE_TIME = 60;
/**
* 缓冲队列大小
*/
private static final int QUEUE_CAPACITY = 100;
@Bean
public Executor asyncServiceExecutor() {
log.info("start asyncServiceExecutor");
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
//配置核心线程数
int coreThreads = Runtime.getRuntime().availableProcessors();
log.info("asyncServiceExecutor coreThreads:{}", coreThreads);
executor.setCorePoolSize(coreThreads);
//配置最大线程数
executor.setMaxPoolSize(coreThreads * 2);
//配置空闲时间
executor.setKeepAliveSeconds(KEEPALIVE_TIME);
//配置队列大小
executor.setQueueCapacity(QUEUE_CAPACITY);
//配置线程前缀名
executor.setThreadNamePrefix("async-service-");
// 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,而是有调用者所在的线程来执行
executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
//执行初始化
executor.initialize();
return executor;
}
}
@Async("asyncServiceExecutor")
public void task1() {
}
@SpringBootApplication
@EnableAsync
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
不积跬步,无以至千里;不积小流,无以成江海。