java - No unique bean of type is defined: expected single matching bean but found 2 -

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• what nosuchbeandefinitionexception , how fix it? 1 answer

i getting below exception when deploying code

 caused by: org.springframework.beans.factory.nosuchbeandefinitionexception: no unique bean of type [com.belk.api.adapter.contract.adapter] defined: expected single matching bean found 2: [endeca, solar]     @ org.springframework.beans.factory.support.defaultlistablebeanfactory.doresolvedependency(defaultlistablebeanfactory.java:800)     @ org.springframework.beans.factory.support.defaultlistablebeanfactory.resolvedependency(defaultlistablebeanfactory.java:707)     @ org.springframework.beans.factory.annotation.autowiredannotationbeanpostprocessor$autowiredfieldelement.inject(autowiredannotationbeanpostprocessor.java:478)     ... 64 more 

i have 3 different projects 1 common, second adapter , third service. adapter dependent on common , service dependent on adapter. 3 maven projects. in common project have interface called commonadapter.java

 public interface commonadapter {     list service() ; } 

i have class called adapterfactory.java in same project (i,e common)

@component public class adapterfactory {     @autowired     adapter adapter;     public adapter getadapter(string adaptername){         return adapter;     }  }        <context:component-scan base-package="com.test.api" />     <bean         class="org.springframework.beans.factory.config.servicelocatorfactorybean"         id="adapterfactory">         <property name="servicelocatorinterface" value="com.test.api.adapter.manager.adapterfactory">         </property>     </bean> 

now in adapter project, have implementation classes commonadapter.java 1 endecaadapetr.java , other solaradapter.java

@component("endeca") public class endecaadapter implements adapter {     list service() {     // bussiness logic     } }  @component("solar") public class solaradapter implements adapter {     list service() {     // bussiness logic     } } 

now in service project, want invoke service method of above 2 classes based on input.

public class productsearchserviceimpl {     @autowired     private adapterfactory adapterfactory;     public search searchproducts(){     adapter endecaadapter = this.adapterfactory                 .getadapter("endeca ");  }  } 

@autowired works when there no doubt on container-managed instance should injected. basically, can attained in (at least) 3 ways:

1. there 1 container-managed bean is-a declared type of autowired field;
2. there more container-managed beans validate above is-a condition, autowired field qualified (in spring, using @qualifier annotation)
3. you don't use @autowired, rather inject beans name.

in case, have 2 beans validate is-a condition:

endeca is-a adapter

and

solar is-a adapter.

so container not have unique autowire candidate, therefore crashes while setting itself.