使用 Feign 访问我在 Eureka 上注册的服务是轻而易举的事。我正在尝试使用 Feign 访问外部服务并在基础知识方面苦苦挣扎。
我正在使用 Bluemix 上的服务,但是为了简化手头的问题,我使用了一个简单的服务。
我的代理显示如下:
//@FeignClient(name = "country-service-client", url = "https://country.io")
@FeignClient(name = "another-country-service-client", url = "http://restcountries.eu/rest/v2/name/Australia")
public interface SimpleServiceProxy {
//This one works
@RequestMapping(method = RequestMethod.GET, value = "/names.json", produces = "application/json")
String getCountries();
//This one does not work... This is used in conjunction where the url in the Fiegn Client annotation reads as - http://restcountries.eu/rest/v2
@RequestMapping(method = RequestMethod.GET, value = "/name/{country}", produces = "application/json")
public String getCountryInfo(@PathVariable("country") String country);
//This one doesn't work either
//@RequestMapping(method = RequestMethod.GET, value = "/name/Australia", produces = "application/json")
public String getCountryInfoHardcodedWithinMethod();
}
//This works however I would want to pass parameters and path variables to the URL
@RequestMapping(method = RequestMethod.GET, produces = "application/json")
public String getCountryInfoHardcodedAtFeignClientAnnotation();
}
我尝试了一些变体(参见上面的代码),最后一个在 Feign Client 注释中硬编码 URL 的变体有效。其他人抛出 TimeoutException。
java.util.concurrent.TimeoutException: null
at com.netflix.hystrix.AbstractCommand.handleTimeoutViaFallback(AbstractCommand.java:958) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.AbstractCommand.access$400(AbstractCommand.java:59) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.AbstractCommand$11.call(AbstractCommand.java:573) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.AbstractCommand$11.call(AbstractCommand.java:565) ~[hystrix-core-1.5.3.jar:1.5.3]
at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:139) ~[rxjava-1.1.5.jar:1.1.5]
at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71) ~[rxjava-1.1.5.jar:1.1.5]
at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71) ~[rxjava-1.1.5.jar:1.1.5]
at com.netflix.hystrix.AbstractCommand$HystrixObservableTimeoutOperator$1.run(AbstractCommand.java:1099) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.strategy.concurrency.HystrixContextRunnable$1.call(HystrixContextRunnable.java:41) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.strategy.concurrency.HystrixContextRunnable$1.call(HystrixContextRunnable.java:37) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.strategy.concurrency.HystrixContextRunnable.run(HystrixContextRunnable.java:57) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.AbstractCommand$HystrixObservableTimeoutOperator$2.tick(AbstractCommand.java:1116) ~[hystrix-core-1.5.3.jar:1.5.3]
at com.netflix.hystrix.util.HystrixTimer$1.run(HystrixTimer.java:99) ~[hystrix-core-1.5.3.jar:1.5.3]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_112]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) ~[na:1.8.0_112]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_112]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) ~[na:1.8.0_112]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_112]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_112]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_112]
我很困惑,并试图弄清楚事情。在尝试找出 PathVariables 不工作的原因之前,我想让硬编码的方法工作。
我错过了什么?(或在这里做错了)?