我希望能够有两个不同的弹簧轮廓,并根据轮廓将其更改为我们的假装建造者的硬编码地址。
当前具有以下内容:
return builder.target(cls, "http://" + serviceName);
但是我实际上想执行以下操作并改写地址:
return builder.target(cls, "http://our-server:8009/" + serviceName);
有时,我们不想在我们的开发环境中运行所有服务。此外,某些服务有时仅通过zuul网关可用。
因此,我们在不同的情况和条件下运行相同的代码。
我们有以下代码可用于构建我们的Feign客户。
过去我们一直使用@FeignClient
批注,但最近我们决定开始手动构建feignClients。
以下示例:
@FeignClient(name = "ab-document-store", configuration = MultiPartSupportConfiguration.class, fallback = DocumentStoreFallback.class)
我们使用以下命令调用feignRegistrar类:
return registerFeignClient(DocumentStoreClient.class, true);
@RequiredArgsConstructor
//@Component
@Slf4j
public class FeignRegistrar {
@Autowired
private Decoder decoder;
@Autowired
private Encoder encoder;
@Autowired
private Client client;
@Autowired
private Contract feignContract;
@Autowired
private ObjectFactory<HttpMessageConverters> messageConverters;
@Autowired
private List<RequestInterceptor> interceptors;
public <T> T register(Class<T> cls, String serviceName, boolean isDocumentStore) {
if(isDocumentStore){
encoder = new MultipartFormEncoder(new SpringEncoder(messageConverters));
}
//Client trustSSLSockets = new Client.Default(getSSLSocketFactory(), new NoopHostnameVerifier());
Feign.Builder builder = Feign.builder()
.client(client)
.encoder(encoder)
.decoder(decoder)
.contract(feignContract)
.logger(new Slf4Logger())
.logLevel(Logger.Level.HEADERS);
builder.requestInterceptor(new RequestInterceptor() {
@Override
public void apply(RequestTemplate template) {
template.header("X-Service-Name", serviceName);
}
});
for(RequestInterceptor interceptor : interceptors) {
builder.requestInterceptor(interceptor);
}
log.debug("Registering {} - as feign proxy ", serviceName);
return builder.target(cls, "http://" + serviceName);
}
public static class Slf4Logger extends Logger {
@Override
protected void log(String configKey, String format, Object... args) {
log.info("{} - {}", configKey, args);
}
}
}
我们也一直在使用诸如application-ENV.property
之类的属性文件,其条目如下:
ab-document-store.ribbon.NIWSServerListClassName:com.netflix.loadbalancer.ConfigurationBasedServerList
ab-document-store.ribbon.listOfServers: localhost:8025
[不幸的是,listOfServers
对我们来说还不够。我们也希望能够分配一个目录/路径。类似于:
ab-document-store.ribbon.listOfServers:localhost:8025 / ab-document-store
我曾考虑过使用伪装拦截器将标头潜入所有请求,例如X-SERVICE-NAME
。然后,我们可以将所有服务指向一个地址(例如localhost:9001),并将这些请求转发/代理到localhost:9001 / X-SERVICE-NAME。
但是,我希望使用更简单的解决方案,例如:
ab-document-store.ribbon.listOfServers: localhost:8025/ab-document-store
但这不起作用:(
我找到了使用检测报头的代理的解决方案。因此,我在Java端有一个伪装拦截器,将标头x-service-name
附加到每个伪装请求。
我还有一个NodeJS代理,可以分析请求,找到x-service-name
,然后将请求重写为:x-service-name
/ originalRequestPath
。
这使我可以将所有微服务都包含在zuul网关后面,而且还可以使用eureka-over-ride来访问它们。
Feign.Builder builder = Feign.builder()
.client(client)
.encoder(usedEncoder)
.decoder(decoder)
.contract(feignContract)
.logger(new Slf4Logger())
.logLevel(Logger.Level.HEADERS);
builder.requestInterceptor(new RequestInterceptor() {
@Override
public void apply(RequestTemplate template) {
template.header("X-Service-Name", serviceName);
}
});
在示例中,我的zuul网关(或其他代理)位于localhost:9001上。我正在听localhost:1200
。
let enableProxyForJava = process.env.ENABLE_PROXY_FOR_JAVA;
if (enableProxyForJava != undefined && enableProxyForJava.toLowerCase() === 'true') {
var httpProxyJava = require('http-proxy');
var proxyJava = httpProxyJava.createProxy();
gutil.log( gutil.colors.green('Enabling Proxy for Java. Set your Eureka overrides to localhost:1200.') );
require('http').createServer(function(req, res) {
console.log("req.headers['x-service-name'] = " + req.headers['x-service-name']);
console.log("Before req.url:"+ req.url);
if( req.headers['x-service-name'] != undefined){
let change = req.headers['x-service-name'] +req.url;
console.log("After req.url:"+ change);
req.url = change;
}
proxyJava.web(req, res, {
target: 'http://localhost:9001/'
});
}).listen(1200);
}
mbak-microservice1.ribbon.NIWSServerListClassName:com.netflix.loadbalancer.ConfigurationBasedServerList
mbak-microservice1.ribbon.listOfServers: localhost:1200
mbak-microservice2.ribbon.NIWSServerListClassName:com.netflix.loadbalancer.ConfigurationBasedServerList
mbak-microservice2.ribbon.listOfServers: localhost:1200
mbak-document-store.ribbon.NIWSServerListClassName:com.netflix.loadbalancer.ConfigurationBasedServerList
mbak-document-store.ribbon.listOfServers: localhost:1200