微服务feign调用添加token1.一般情况是这么配置的
具体的怎么调用就不说了 如下配置，就可以在请求头中添加需要的请求头信息。
package localdate;import feign.RequestInterceptor;import feign.RequestTemplate;import lombok.extern.slf4j.Slf4j;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Configuration;import org.springframework.stereotype.Component;import org.springframework.web.context.request.RequestAttributes;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest;import java.util.Collection;import java.util.Enumeration;import java.util.Iterator;import java.util.Map;/** * feign调用服务时，会丢失请求头信息。需要在这里把认证信息收到添加上去 * @author TRON * @since 2019-11-23 * * */@Configuration@Slf4jpublic class FeignTokenInterceptor implements RequestInterceptor { @Override public void apply(RequestTemplate requestTemplate) { log.info("======上下文中获取原请求信息======"); String token = "without token"; HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest(); Enumeration<String> headerNames = request.getHeaderNames(); while (headerNames.hasMoreElements()) { String headerName = headerNames.nextElement(); String HeadValue = request.getHeader(headerName); log.info("===原请求头信息=== headName: {}, headValue: {}", headerName, HeadValue); if (headerName.equals("X-Authorization-access_token")||headerName.equals("x-authorization-access_token")) { token = HeadValue; } } log.info("=======Feign添加头部信息start======");// requestTemplate.header("X-Authorization-access_token", token); requestTemplate.header("X-Authorization-access_token", "tron123456"); log.info("=======Feign添加头部信息end======"); }}
2 .但是，当熔断开启后，原先的这么配置就不起作用了
package localdate;import com.netflix.hystrix.HystrixThreadPoolKey;import com.netflix.hystrix.strategy.HystrixPlugins;import com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy;import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariable;import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariableLifecycle;import com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier;import com.netflix.hystrix.strategy.executionhook.HystrixCommandExecutionHook;import com.netflix.hystrix.strategy.metrics.HystrixMetricsPublisher;import com.netflix.hystrix.strategy.properties.HystrixPropertiesStrategy;import com.netflix.hystrix.strategy.properties.HystrixProperty;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.context.annotation.Configuration;import org.springframework.web.context.request.RequestAttributes;import org.springframework.web.context.request.RequestContextHolder;import java.util.concurrent.BlockingQueue;import java.util.concurrent.Callable;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.TimeUnit;/** * 自定义并发策略 * 将现有的并发策略作为新并发策略的成员变量 * 在新并发策略中，返回现有并发策略的线程池、Queue * * hystrix.command.default.execution.isolation.strategy=THREAD * Hystrix的默认隔离策略（官方推荐，当使用该隔离策略时，是没办法拿到 ThreadLocal 中的值的，但是RequestContextHolder 源码中，使用了两个ThreadLocal） * hystrix.command.default.execution.isolation.strategy=SEMAPHORE （将隔离策略改为SEMAPHORE 也可以解决这个问题，但是官方并不推荐这个策略，因为这个策略对网络资源消耗比较大） * * 主要是解决当 Hystrix的默认隔离策略是THREAD时，不能通过RequestContextHolder获取到request对象的问题 * *///@Configurationpublic class FeignConfig extends HystrixConcurrencyStrategy { private static final Logger log = LoggerFactory.getLogger(FeignConfig.class); private HystrixConcurrencyStrategy delegate; public FeignConfig() { try { this.delegate = HystrixPlugins.getInstance().getConcurrencyStrategy(); if (this.delegate instanceof FeignConfig) { // Welcome to singleton hell... return; } HystrixCommandExecutionHook commandExecutionHook = HystrixPlugins.getInstance().getCommandExecutionHook(); HystrixEventNotifier eventNotifier = HystrixPlugins.getInstance().getEventNotifier(); HystrixMetricsPublisher metricsPublisher = HystrixPlugins.getInstance().getMetricsPublisher(); HystrixPropertiesStrategy propertiesStrategy = HystrixPlugins.getInstance().getPropertiesStrategy(); this.logCurrentStateOfHystrixPlugins(eventNotifier, metricsPublisher, propertiesStrategy); HystrixPlugins.reset(); HystrixPlugins.getInstance().registerConcurrencyStrategy(this); HystrixPlugins.getInstance().registerCommandExecutionHook(commandExecutionHook); HystrixPlugins.getInstance().registerEventNotifier(eventNotifier); HystrixPlugins.getInstance().registerMetricsPublisher(metricsPublisher); HystrixPlugins.getInstance().registerPropertiesStrategy(propertiesStrategy); } catch (Exception e) { log.error("Failed to register Sleuth Hystrix Concurrency Strategy", e); } } private void logCurrentStateOfHystrixPlugins(HystrixEventNotifier eventNotifier, HystrixMetricsPublisher metricsPublisher, HystrixPropertiesStrategy propertiesStrategy) { if (log.isDebugEnabled()) { log.debug("Current Hystrix plugins configuration is [" + "concurrencyStrategy [" + this.delegate + "]," + "eventNotifier [" + eventNotifier + "]," + "metricPublisher [" + metricsPublisher + "]," + "propertiesStrategy [" + propertiesStrategy + "]," + "]"); log.debug("Registering Sleuth Hystrix Concurrency Strategy."); } } @Override public <T> Callable<T> wrapCallable(Callable<T> callable) { RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes(); return new WrappedCallable<>(callable, requestAttributes); } @Override public ThreadPoolExecutor getThreadPool(HystrixThreadPoolKey threadPoolKey, HystrixProperty<Integer> corePoolSize, HystrixProperty<Integer> maximumPoolSize, HystrixProperty<Integer> keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue) { return this.delegate.getThreadPool(threadPoolKey, corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue); } @Override public BlockingQueue<Runnable> getBlockingQueue(int maxQueueSize) { return this.delegate.getBlockingQueue(maxQueueSize); } @Override public <T> HystrixRequestVariable<T> getRequestVariable(HystrixRequestVariableLifecycle<T> rv) { return this.delegate.getRequestVariable(rv); } static class WrappedCallable<T> implements Callable<T> { private final Callable<T> target; private final RequestAttributes requestAttributes; public WrappedCallable(Callable<T> target, RequestAttributes requestAttributes) { this.target = target; this.requestAttributes = requestAttributes; } @Override public T call() throws Exception { try { RequestContextHolder.setRequestAttributes(requestAttributes); return target.call(); } finally { RequestContextHolder.resetRequestAttributes(); } } }}
3 .feign和熔断的配置
feign: client: config: default: connectTimeout: 5000 #连接超时3秒，连接失败时直接调用降级方法 readTimeout: 100000 #连接成功，处理数据的时间限制10秒 100000 读取时间过短会抛异常java.net.SocketTimeoutException: Read timed out loggerLevel: full #日志输出等级 hystrix: enabled: truehystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 5000 #服务连接成功，但是时间过长，降级方法调用时间 60000 5000
feign微服务的相互调用
我只是记录服务提供方、消费方的代码编写，配置什么的大家在网上搜，一大堆。
首先是服务提供方：
启动类上加上注解@EnableFeignClients，然后正常的写controller、service等业务逻辑
其次是服务的调用方：
1.首先启动类上加上注解@EnableFeignClients
2.编写服务调用接口
3.编写接口熔断处理方法
4.本人遇到的问题是需要用到调用方的请求头里面的信息，但是在提供方取不到，这时可以通过在调用方增加配置来解决
import feign.RequestInterceptor;import feign.RequestTemplate;import java.util.Enumeration;import javax.servlet.http.HttpServletRequest;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes; /** * @author ydf * @date 2021/5/13 * @description: **/public class FeignBasicAuthRequestInterceptor implements RequestInterceptor { @Override public void apply(RequestTemplate requestTemplate) { ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder .getRequestAttributes(); HttpServletRequest request = attributes.getRequest(); Enumeration<String> headerNames = request.getHeaderNames(); if (headerNames != null) { while (headerNames.hasMoreElements()) { String name = headerNames.nextElement(); String values = request.getHeader(name); requestTemplate.header(name, values); } } }}
import com.jingling.netsign.applet.interceptor.FeignBasicAuthRequestInterceptor;import feign.RequestInterceptor;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration; /** * @author ydf * @date 2021/5/13 * @description: **/@Configurationpublic class FeignSupportConfig { /** * feign请求拦截器 * * @return */ @Bean public RequestInterceptor requestInterceptor(){ return new FeignBasicAuthRequestInterceptor(); }}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
因为在路上你就已经收获了自由自在的好心情。
