Inject custom feign client into Spring Application

Question

I am currently trying to get a grip of both Spring and Feign. Cutting straight to the point: I am struggling to modify @FeignClient in this project: Feign Hello World by Walery so as to instead of

WikidataClient

@FeignClient(url = "https://www.wikidata.org/w")
// https://www.wikidata.org/w/api.php?action=wbsearchentities&search=apple&language=en&format=json
public interface WikidataClient {

    @RequestMapping(value = "/api.php?action=wbsearchentities&language=en&format=json", method = GET)
    WebsearchEntities searchForEntities(@RequestParam("search") final String search);
}

use @Autowired notation similar to one found here: Section called : Creating Feign Clients Manually

The purpose of this would be to inject custom decoder and encoder later on. I've been exprimenting with it for a while and all I managed to achieve was ruin the whole thing.

I gathered some clues from here and there and managed to come to the point where I created a Configuration class :

FeignConfig

@Import(FeignClientsConfiguration.class)
public class FeignConfig {
    public WikidataClient fooclient;
    @Autowired
    public FeignConfig(Encoder encoder, Decoder decoder){
        this.fooclient = Feign.builder()
                .encoder(encoder)
                .decoder(decoder)
                .target(WikidataClient.class,"https://www.wikidata.org/w");
    }
}

Modified

WikidataClient

interface slightly

//@FeignClient(url = "https://www.wikidata.org/w")
// https://www.wikidata.org/w/api.php?action=wbsearchentities&search=apple&language=en&format=json
public interface WikidataClient {

    @RequestMapping(value = "/api.php?action=wbsearchentities&language=en&format=json", method = GET)
    WebsearchEntities searchForEntities(@RequestParam("search") final String search);
}

and tried to use aforementioned class instead

WikidataRunner

@Component
public class WikidataRunner implements CommandLineRunner {
    private final WikidataClient omdbClient;
    @Autowired
    public WikidataRunner(WikidataClient omdbClient){
        this.omdbClient = omdbClient;
        this.feignConfig = new FeignConfig(new Encoder.Default(), new Decoder.Default());
    }

    FeignConfig feignConfig;
    @Override
    public void run(final String... args) throws Exception {
        final WebsearchEntities apple = feignConfig.fooclient.searchForEntities("apple");
        System.out.println(apple);
    }
}

All I got were different kind of Bean errors

2017-07-19 08:02:29.056 ERROR 2018 --- Exception in thread "main" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'wikidataRunner' defined in file [/home/mibi/IdeaProjects/FUFEign/feign-helloworld/target/classes/codes/walery/research/feign/wikidata/WikidataRunner.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [codes.walery.research.feign.wikidata.WikidataClient]: : No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} [
main] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) o.s.boot.SpringApplication at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) : Application startup failed at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1326) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1072) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:967) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:667) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:342) ... 18 common frames omitted at org.springframework.boot.SpringApplication.run(SpringApplication.java:273) at org.springframework.boot.SpringApplication.run(SpringApplication.java:980) at org.springframework.boot.SpringApplication.run(SpringApplication.java:969) at codes.walery.research.feign.FeignHelloworldApplication.main(FeignHelloworldApplication.java:12) Wrapped by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'wikidataRunner' defined in file [/home/mibi/IdeaProjects/FUFEign/feign-helloworld/target/classes/codes/walery/research/feign/wikidata/WikidataRunner.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [codes.walery.research.feign.wikidata.WikidataClient]: : No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 beCaused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1326) an which qualifies as autowire candidate for this dependency. Dependency annotations: {} at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1072) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:967) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] ... 18 more at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834) ~[spring-context-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:667) [spring-boot-1.3.0.M5.jar:1.3.0.M5] at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:342) [spring-boot-1.3.0.M5.jar:1.3.0.M5] at org.springframework.boot.SpringApplication.run(SpringApplication.java:273) [spring-boot-1.3.0.M5.jar:1.3.0.M5] at org.springframework.boot.SpringApplication.run(SpringApplication.java:980) [spring-boot-1.3.0.M5.jar:1.3.0.M5] at org.springframework.boot.SpringApplication.run(SpringApplication.java:969) [spring-boot-1.3.0.M5.jar:1.3.0.M5] at codes.walery.research.feign.FeignHelloworldApplication.main(FeignHelloworldApplication.java:12) [classes/:na] 2017-07-19 08:02:29.059 INFO 2018 --- [ Thread-1] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@3d8314f0: startup date [Wed Jul 19 08:02:24 CEST 2017]; root of context hierarchy

Process finished with exit code 1

I won't deny being novice at Spring and Feign. Thing is I need to undestand both of these desperately. So far I've spent 10+ hours researching about Feign to no avail.

Kindly asking for help and guidance

MissingBracket

We need to know what those "different" kind of errors are; we can't read your mind and solve a problem that you didn't describe. — Abhijit Sarkar, Jul 19 '17 at 02:14
Edited. There is either one posted above or "Failed to load application context" — Basile Czajkowski, Jul 19 '17 at 06:09

score 0 · Answer 1 · answered Nov 19 '21 at 10:06

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [codes.walery.research.feign.wikidata.WikidataClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.

try to declare a bean somewhere:

    @Bean
    public WikiDataClient wikiDataClient () {

    }

Construct feign client with feign builder manually:

Feign.builder().client(client).encoder(encoder).decoder(decoder).contract(contract).target(WikiDataClient.class, "http://serviceId")

Inject custom feign client into Spring Application

1 Answers1