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Autowire specific inner bean in Spring


Autowire specific inner bean in Spring

By : Gary Petrie
Date : November 22 2020, 03:01 PM
I wish did fix the issue. I have an interface called HttpClient, and two beans implementation of the bean,
code :
@Component("httpClient")
public class HttpClientImpl implements HttpClient {
    @Override
    public String bla() {
        return null;
    }
}

@Component("httpClientMock")
public class HttpClientMock implements HttpClient {
    @Override
    public String bla() {
        return null;
    }
}

@Component
public class Wrapper {
    @Autowired
    @Qualifier("httpClient")
    HttpClient httpClient;

    @Autowired
    @Qualifier("httpClientMock")
    HttpClient httpClientMock;
}
@Component("httpClientMock")
@Profile("test")
public class HttpClientMock implements HttpClient {
    @Override
    public String bla() {
        return null;
    }
}


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Autowire Service bean into an XML defined bean in Spring

Autowire Service bean into an XML defined bean in Spring


By : rprep9
Date : March 29 2020, 07:55 AM
This might help you In my Spring Application, I have a bean defined in my xml as such: , Add this to your context xml file:
code :
<context:component-scan base-package="com.myproject.core.security" />
spring boot: unable to autowire bean, but the bean is defined for sure

spring boot: unable to autowire bean, but the bean is defined for sure


By : joseAndres-sc
Date : March 29 2020, 07:55 AM
like below fixes the issue The problem was caused by a forgotten annotation: @AutoWired was missing and because of this I had two instances. One was configured correctly and included the jdbcTemplate, the other had a null jdbcTemplate. I checked the first one, but it was not used.
Spring: How to autowire or (use new) a bean with constructor parameter and which is not a managed bean

Spring: How to autowire or (use new) a bean with constructor parameter and which is not a managed bean


By : user3770627
Date : March 29 2020, 07:55 AM
it should still fix some issue There's no way for Spring to know what ShoppingCart instance to use when instantiating CreateDatabaseAction if there is no managed bean of that type. I think that you should reconsider the design. For example send it as method parameter where it's actually used and remove it from the constructor.
Considering only the names, I would say that ShoppingCart would be a good candidate for a session scoped bean.
How can I autowire a specific implementation of an interface by its bean name in Spring

How can I autowire a specific implementation of an interface by its bean name in Spring


By : B Wiz
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You can use qualifiers, e.g:
code :
@Component
@Qualifier("classA")
public MyInterface ClassA {
     return new ClassA();
}

@Component
@Qualifier("classB")
public MyInterface ClassB {
     return new ClassB();
}
public class SomeClass {
    @Autowired
    @Qualifier("classA")
    private MyInterface classA;
}
Autowire a bean from spring config - Environment specific

Autowire a bean from spring config - Environment specific


By : user2050532
Date : March 29 2020, 07:55 AM
like below fixes the issue I'm trying to have environment specific boolean flag. In my spring config, I defined three beans which are environment specific as per below. , Change your bean definition to:
code :
<bean id="validationFlag-E1" class="java.lang.Boolean">
     <constructor-arg value="false"/>
</bean>
    <bean id="validationFlag-E2" class="java.lang.Boolean">
<constructor-arg value="true"/>
</bean>
    <bean id="validationFlag-E3" class="java.lang.Boolean">
<constructor-arg value="true"/>
</bean>
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