I'm new with Spring, and I'm trying to use the #Autowire annotation for the ServletContext with my class attribute:
#Controller
public class ServicesImpl implements Services{
#Autowired
ServletContext context;
I defined the bean for this class in my dispatcher-servlet.xml:
<bean id="services" class="com.xxx.yyy.ServicesImpl" />
But when I try to run a JUnit test it gives the following error:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [javax.servlet.ServletContext] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
I thought that the ServletContext injection was automatic with spring... How can I solve this?
Thanks!
EDIT: I want to use the servletContext to call the getRealPath() method. Is there any alternative?
Implement the ServletContextAware interface and Spring will inject it for you
#Controller
public class ServicesImpl implements Services, ServletContextAware{
private ServletContext context;
public void setServletContext(ServletContext servletContext) {
this.context = servletContext;
}
You'll probably want to take a look at MockServletContext which can be used in unit tests.
ServletContext is not a Spring bean and it can, therefore, not be injected unless you implement ServletContextAware.
If one thinks in modules or layers then the servlet context shouldn't be available outside the web module/layer. I suppose your ServicesImpl forms part of the business or service layer.
If you gave a little more context we might be able to suggest better alternatives.
Related
Hy everyone! I'm trying to solve the problem for a very long time.
There is very simple spring boot test
public class ApplicationTest {
#Test
void testContext() {
SpringApplication.run(Application.class);
}
}
And several beans...
#Service
#ConditionalOnBean(CommonService.class)
#RequiredArgsConstructor
public class SimpleHelper {
...
#Service
#RequiredArgsConstructor
#ConditionalOnBean(CommonFeignClient.class)
public class CommonService {
...
#FeignClient(
name = "CommonClient",
url = "localhost:8080"
)
public interface CommonFeignClient {
And the main class look as
#SpringBootApplication
#EnableFeignClients(clients = AnotherFeignClient.class)
public class Application {
When the spring application starts everything works ok. SimpleHelper does not created.
But in the spring boot test throw the exception:
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'simpleHelper' defined in URL [...]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'foo.bar.CommonService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
Please help, I don't understand what's going on anymore =)
Spring boot version is 2.3.0.RELEASE.
To use #ConditionalOnBean correctly, CommonService needs to be an auto-configuration class or defined as a bean by an auto-configured class rather than a service that's found by component scanning. This ensures that the bean on which CommonService is conditional has been defined before the condition is evaluated. The need for this is described in the annotation's javadoc:
The condition can only match the bean definitions that have been processed by the application context so far and, as such, it is strongly recommended to use this condition on auto-configuration classes only. If a candidate bean may be created by another auto-configuration, make sure that the one using this condition runs after.
I create a java archive and i would like integrate this on my application.
on my principal application :
ApplicationContext.xml :
<context:component-scan base-package="com.test.chomage" />
ChomageController.java :
#Controller
#Path("/chomage")
public class ChomageController {
#Autowired
ChomageService chomageService;
#Autowired
OrganisationService organisationService;
}
On my java archive :
appConfig.java
#Configuration
#ComponentScan("com.test.jarPatrimoine")
public class AppConfig {
}
OrganisationService.java
public interface OrganisationService {
//Functions
}
OrganisationServiceImpl.java
#Service
#Transactional
public class OrganisationServiceImpl implements OrganisationService
//Functions
}
When i start my tomcat server, i have the next error :
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'chomageController':
Unsatisfied dependency expressed through field 'organisationService';
nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException:
No qualifying bean of type
'com.test.jarPatrimoine.service.OrganisationService' available:
expected at least 1 bean which qualifies as autowire candidate. Dependency
annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Can you help me ?
Thanks
Spring is looking for com.vnf.jarPatrimoine.service.OrganisationService, but scan is configured as #ComponentScan("com.test.jarPatrimoine"). You might have to change it.
Are there any other classes implementing OrganisationService? If so you need to add #Qualifier annotation to inject the right implementation.
#Autowire
#Qualifier("thequalifyingbean")
OrganisationService organisationService;
also use #Controller for your controller class instead of #Component
I am getting the BeanCurrentlyInCreationException when I start my spring application.
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.datayes.bdb.rrp.business.service.impl.StockModelBaseService com.datayes.bdb.rrp.business.service.impl.StockModelV3ServiceImpl.stockModelBaseService; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'stockModelBaseService': Bean with name 'stockModelBaseService' has been injected into other beans [researchFrameworkCommonServiceImpl] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
... 71 more
Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'stockModelBaseService': Bean with name 'stockModelBaseService' has been injected into other beans [researchFrameworkCommonServiceImpl] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:568)
And here are the code snippets I have found caused this issue:
#Component public class KafkaConsumerServer implements MessageListener<String, String> {
#Autowired StockModelV3Service stockModelV3Service;
#Autowired FinanceIndicatorService financeIndicatorService;
......
}
#Service public class FinanceIndicatorServiceImpl implements FinanceIndicatorService {
#Autowired StockModelV3Service stockModelV3Service;
#Autowired IndustryResearchFrameworkService industryResearchFrameworkService;
......
}
#Service public class IndustryResearchFrameworkServiceImpl implements IndustryResearchFrameworkService {
#Autowired ResearchFrameworkCommonService commonService;
......
}
#Service public class ResearchFrameworkCommonServiceImpl implements ResearchFrameworkCommonService {
#Autowired StockModelBaseService stockModelBaseService;
......
}
I found some thing interesting in the following article may have explained why.
https://blog.imaginea.com/spring-bean-creation-is-not-thread-safe/
As both my StockModelV3Service and FinanceIndicatorService depends on stockModelBaseService(FinanceIndicatorService -> industryResearchFrameworkService -> researchFrameworkCommonService -> stockModelBaseService), during spring bean creation, they have raced against each other. Which caused BeanCurrentlyInCreationException. As the above article noted, spring bean creation is not thread safe.
To solve this problem seems easy. I changed autowire order as below:
public class KafkaConsumerServer implements MessageListener<String, String> {
#Autowired FinanceIndicatorService financeIndicatorService;
#Autowired StockModelV3Service stockModelV3Service;
As FinanceIndicatorService also depends on StockModelV3Service, so when financeIndicatorService is loaded, it will wait till stockModelV3Service is loaded then load itself. Thus avoid BeanCurrentlyInCreationException.
After all, it has nothing to do with circular reference. As StockModelBaseService doesn't depends on other services.
I'm currently testing spring data rest, and I want to expose the primary keys (ids) of my entities through the REST interface.
I have found that the proper (?) way to do this is:
public class IdExporterConfiguration extends RepositoryRestMvcConfiguration {
#Override
protected void configureRepositoryRestConfiguration(
RepositoryRestConfiguration config) {
super.configureRepositoryRestConfiguration(config);
config.exposeIdsFor(User.class);
}
}
The problem is, that if I change my bean definition to this:
<bean class="test.project.util.IdExporterConfiguration"/>
From this:
<bean class="org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration"/>
my application fails to start...
The error is:
Could not autowire field: org.springframework.data.geo.GeoModule org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.geoModule;
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.data.geo.GeoModule] found for dependency:
expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
Basically it says that it does not find a GeoModule bean, so it can't autowire it for the RepositoryRestMvcConfiguration base...
Now the fun part is, that is I define the bean:
<bean class="org.springframework.data.geo.GeoModule"/>
The error changes to:
Could not autowire field: org.springframework.data.geo.GeoModule org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.geoModule;
nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [org.springframework.data.geo.GeoModule] is defined:
expected single matching bean but found 2: jacksonGeoModule,org.springframework.data.geo.GeoModule#0
So if I don't define a bean, there is 0, but if I define one, there is 2?
I still don't know why, but if I use the #Configuration annotation, then it works...
No GeoModule bean needed, but how can it be, that with the original config as XML bean definition it works, but with the subclass, it does not?
I am trying all the solutions from Google from last 4 days. but not working.
I am trying to autowire below Interface -
#Qualifier("roleAccessRepository")
#Repository
public interface RoleAccessRepository extends BaseJPACrudRepository<RoleAccess, Long> {
in PermissionEvaluator in following way.But its not working.
#Scope(proxyMode = ScopedProxyMode.INTERFACES, value = "prototype")
public class PermissionEvaluator implements org.springframework.security.access.PermissionEvaluator
{
#Autowired
RoleAccessRepository roleAccessRepository;
..........
Giving me error -
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: net.pa
ger.lrs.sql.db.RoleAccessRepository net.pager.lrs.security.PermissionEvaluator.roleAccessRepository;
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying
bean of type [net.pager.lrs.sql.db.RoleAccessRepository] found for dependency: expected at least 1 b
ean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springf
But Repository defined in the same package and autowired in service class are working good.
#Service
#Transactional
public class AccountService extends BaseCrudService<Account> {
/** The account db. */
#Autowired
private AccountRepository accountDB;
}
My security.xml is as follows - which has base package net.pager.lrs which is parent directory.
<bean id="permissionEvaluator" class="net.pager.lrs.security.PermissionEvaluator">
<constructor-arg index="0">
Please help me.
Ok,
From the discussions above, I still think that the problem is with not having the concrete implementation of the Autowired interfaces. Just for the sake of common sense, if you do not provide an implementation, what will you execute using the reference of the Autowired interface.
There is a way where you do not define the implementation, spring can generate proxy beans and autowire, but that is of no use.
You might end up providing an anonymous implementation of the interface as well.