微服务实战之怎样提升springboot服务吞吐量

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-undertow</artifactId>
        </dependency>

server:
  undertow:
    direct-buffers: true
    io-threads: 4
    worker-threads: 160

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

@EnableAsync
@SpringBootApplication
public class AppApplication
{
    public static void main(String[] args)
    {
        SpringApplication.run(AppApplication.class, args);
    }
}

@Async
    public Future<String> doReturn(int i){
        try {
            // 这个方法需要调用500毫秒
            Thread.sleep(500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        // 消息汇总
        return new AsyncResult<>("异步调用");
    }

import org.slf4j.MDC;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskDecorator;
import org.springframework.scheduling.annotation.AsyncConfigurerSupport;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.Map;
import java.util.concurrent.Executor;
/**
 * @Description:
 */
@EnableAsync
@Configuration
public class AsyncConfig extends AsyncConfigurerSupport {
    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setTaskDecorator(new MdcTaskDecorator());
        executor.initialize();
        return executor;
    }
}
class MdcTaskDecorator implements TaskDecorator {
    @Override
    public Runnable decorate(Runnable runnable) {
        Map<String, String> contextMap = MDC.getCopyOfContextMap();
        return () -> {
            try {
                MDC.setContextMap(contextMap);
                runnable.run();
            } finally {
                MDC.clear();
            }
        };
    }
}

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 TaskExecutorConfig {
    @Bean("localDbThreadPoolTaskExecutor")
    public Executor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
        taskExecutor.setCorePoolSize(5);
        taskExecutor.setMaxPoolSize(200);
        taskExecutor.setQueueCapacity(200);
        taskExecutor.setKeepAliveSeconds(100);
        taskExecutor.setThreadNamePrefix("LocalDbTaskThreadPool");
        taskExecutor.setRejectedExecutionHandler((Runnable r, ThreadPoolExecutor executor) -> {
                    if (!executor.isShutdown()) {
                        try {
                            Thread.sleep(300);
                            executor.getQueue().put(r);
                        } catch (InterruptedException e) {
                            log.error(e.toString(), e);
                            Thread.currentThread().interrupt();
                        }
                    }
                }
        );
        taskExecutor.initialize();
        return taskExecutor;
    }
}