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网上看到的,到底性能如何暂时不知道,暂时先存一下,之后会测试一下
关键字:com.netflix.hystrix.exception.HystrixRuntimeException; timeout; could not be queued for execution
首先,把 tomcat 换成 undertow,这个性能在 Jmeter 的压测下,undertow 比 tomcat 高一倍
第一步,pom 修改
- <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>
第二步,配置
- server:
- undertow:
- max-http-post-size: 0
- # 设置IO线程数, 它主要执行非阻塞的任务,它们会负责多个连接, 默认设置每个CPU核心一个线程,数量和CPU 内核数目一样即可
- io-threads: 4
- # 阻塞任务线程池, 当执行类似servlet请求阻塞操作, undertow会从这个线程池中取得线程,它的值设置取决于系统的负载 io-threads*8
- worker-threads: 32
- # 以下的配置会影响buffer,这些buffer会用于服务器连接的IO操作,有点类似netty的池化内存管理
- # 每块buffer的空间大小,越小的空间被利用越充分
- buffer-size: 1024
- # 每个区分配的buffer数量 , 所以pool的大小是buffer-size * buffers-per-region
- # buffers-per-region: 1024 # 这个参数不需要写了
- # 是否分配的直接内存
- direct-buffers: true
其次把普通的 HTTPURLConnection 替换为使用 HTTPClient
第一步 pom 增加对应的包
- <dependency>
- <groupId>io.github.openfeign</groupId>
- <artifactId>feign-httpclient</artifactId>
- </dependency>
第二部,在 application.yml或者 bootstrap.yml 里面配置
-
- # feign配置
- feign:
- hystrix:
- # 在feign中开启hystrix功能,默认情况下feign不开启hystrix功能
- enabled: true
- ## 配置httpclient线程池
- httpclient:
- enabled: true
- okhttp:
- enabled: false
第三步,配置 HTTPClient Bean
- import java.util.Timer;
- import java.util.TimerTask;
- import java.util.concurrent.TimeUnit;
-
- import org.apache.http.client.HttpClient;
- import org.apache.http.client.config.RequestConfig;
- import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;
- import org.apache.http.impl.client.HttpClientBuilder;
- import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.annotation.Configuration;
-
- @Configuration
- public class HttpPool {
-
- @Bean
- public HttpClient httpClient(){
- System.out.println("===== Apache httpclient 初始化连接池开始===" );
- // 生成默认请求配置
- RequestConfig.Builder requestConfigBuilder = RequestConfig.custom();
- // 超时时间
- requestConfigBuilder.setSocketTimeout(5 * 1000);
- // 连接时间
- requestConfigBuilder.setConnectTimeout(5 * 1000);
- RequestConfig defaultRequestConfig = requestConfigBuilder.build();
- // 连接池配置
- // 长连接保持30秒
- final PoolingHttpClientConnectionManager pollingConnectionManager = new PoolingHttpClientConnectionManager(30, TimeUnit.MILLISECONDS);
- // 总连接数
- pollingConnectionManager.setMaxTotal(1000);
- // 同路由的并发数
- pollingConnectionManager.setDefaultMaxPerRoute(100);
-
- // httpclient 配置
- HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
- // 保持长连接配置,需要在头添加Keep-Alive
- httpClientBuilder.setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy());
- httpClientBuilder.setConnectionManager(pollingConnectionManager);
- httpClientBuilder.setDefaultRequestConfig(defaultRequestConfig);
- HttpClient client = httpClientBuilder.build();
-
- // 启动定时器,定时回收过期的连接
- Timer timer = new Timer();
- timer.schedule(new TimerTask() {
- @Override
- public void run() {
- System.out.println("=====closeIdleConnections===");
- pollingConnectionManager.closeExpiredConnections();
- pollingConnectionManager.closeIdleConnections(5, TimeUnit.SECONDS);
- }
- }, 10 * 1000, 5 * 1000);
- System.out.println("===== Apache httpclient 初始化连接池完毕===");
-
- return client;
- }
-
-
- }

第一步,还是导入包
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-hystrix</artifactId>
- </dependency>
第二步,配置
- # 配置hystrix的参数
- hystrix:
- threadpool:
- # default: 默认参数,作用的所有的hystrix的客户端,如果需要对某个具体的接口,可以写接口+方法名称
- default:
- coreSize: 500
- command:
- default:
- fallback:
- # 是否开启回退方法
- enabled: true
- execution:
- isolation:
- thread:
- timeoutInMilliseconds: 30000 #缺省为1000
。
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