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OpenFeign本质是HTTP来进行服务调用的#xff0c;也就是需要集成一个Http客户端。
使用的是Client接口来进行请求的
public interface Client {// request是封装的请求方式、参数、返回值类型/… 文章目录 OpenFeign集成OkHttp添加依赖配置连接池yml配置 OpenFeign集成OkHttp
OpenFeign本质是HTTP来进行服务调用的也就是需要集成一个Http客户端。
使用的是Client接口来进行请求的
public interface Client {// request是封装的请求方式、参数、返回值类型// options 是连接超时、读取超时等的配置项Response execute(Request request, Options options) throws IOException;
}默认是HttpURLConnection方式也就是jdk中提供的最原始的那个
public static class Default implements Client {Overridepublic Response execute(Request request, Options options) throws IOException {HttpURLConnection connection convertAndSend(request, options);return convertResponse(connection).toBuilder().request(request).build();}
}HTTP连接需要进行TCP三次握手是一个比较耗时的操作一般我们不直接使用HttpURLConnection而是使用HttpClient/okHttp等支持连接池的客户端工具以Feign集成OkHttp为例
添加依赖 dependencygroupIdio.github.openfeign/groupIdartifactIdfeign-okhttp/artifactId/dependency其包内有一个Client的实现类OkHttpClient
public final class OkHttpClient implements Client {Overridepublic feign.Response execute(feign.Request input, feign.Request.Options options)throws IOException {okhttp3.OkHttpClient requestScoped;if (delegate.connectTimeoutMillis() ! options.connectTimeoutMillis()|| delegate.readTimeoutMillis() ! options.readTimeoutMillis()) {requestScoped delegate.newBuilder().connectTimeout(options.connectTimeoutMillis(), TimeUnit.MILLISECONDS).readTimeout(options.readTimeoutMillis(), TimeUnit.MILLISECONDS).followRedirects(options.isFollowRedirects()).build();} else {requestScoped delegate;}Request request toOkHttpRequest(input);Response response requestScoped.newCall(request).execute();return toFeignResponse(response, input).toBuilder().request(input).build();}
}配置连接池
import okhttp3.ConnectionPool;
import okhttp3.OkHttpClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import javax.net.ssl.*;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import java.util.concurrent.TimeUnit;Configuration
public class OkHttpConfig {/*** OkHttp 客户端配置** return OkHttp 客户端配*/Beanpublic OkHttpClient okHttpClient() {return new OkHttpClient.Builder().sslSocketFactory(sslSocketFactory(), x509TrustManager()).hostnameVerifier(hostnameVerifier()).retryOnConnectionFailure(false) //是否开启缓存.connectionPool(pool()) //连接池.connectTimeout(15L, TimeUnit.SECONDS) // 连接超时时间.readTimeout(15L, TimeUnit.SECONDS) // 读取超时时间.followRedirects(true) // 是否允许重定向.build();}/*** 忽略证书校验** return 证书信任管理器*/Beanpublic X509TrustManager x509TrustManager() {return new X509TrustManager() {Overridepublic void checkClientTrusted(X509Certificate[] x509Certificates, String s) {}Overridepublic void checkServerTrusted(X509Certificate[] x509Certificates, String s) {}Overridepublic X509Certificate[] getAcceptedIssuers() {return new X509Certificate[0];}};}/*** 信任所有 SSL 证书** return*/Beanpublic SSLSocketFactory sslSocketFactory() {try {TrustManager[] trustManagers new TrustManager[]{x509TrustManager()};SSLContext sslContext SSLContext.getInstance(SSL);sslContext.init(null, trustManagers, new SecureRandom());return sslContext.getSocketFactory();} catch (NoSuchAlgorithmException | KeyManagementException e) {e.printStackTrace();}return null;}/*** 连接池配置** return 连接池*/Beanpublic ConnectionPool pool() {// 最大连接数、连接存活时间、存活时间单位分钟return new ConnectionPool(200, 5, TimeUnit.MINUTES);}/*** 信任所有主机名** return 主机名校验*/Beanpublic HostnameVerifier hostnameVerifier() {return (s, sslSession) - true;}
}yml配置
要开启OkHttp ,还需要在YML 中添加开启配置项默认是关闭的
feign:okhttp:enabled: true至于为什么需要配这个看一下FeignAutoConfiguration中装配OkHttp的条件
Configuration(proxyBeanMethods false)
ConditionalOnClass(OkHttpClient.class)
ConditionalOnMissingClass(com.netflix.loadbalancer.ILoadBalancer)
ConditionalOnMissingBean(okhttp3.OkHttpClient.class)
ConditionalOnProperty(feign.okhttp.enabled)
protected static class OkHttpFeignConfiguration参考文献
OpenFeign集成OkHttp
