I want to register a Spring Converter in a Spring Boot project programmatically. In past Spring projects I've done it in XML like this...
<!-- Custom converters to allow automatic binding from Http requests parameters to objects -->
<!-- All converters are annotated w/@Component -->
<bean id="conversionService"
class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<list>
<ref bean="stringToAssessmentConverter" />
</list>
</property>
</bean>
I'm trying to figure out how to do in Spring Boot's SpringBootServletInitializer
Update: I've made a little progress by passing the StringToAssessmentConverter as an argument to getConversionService
, but now I'm getting a "No default constructor found"
error for the StringToAssessmentConverter class. I'm not sure why Spring is not seeing the @Autowired constructor.
@SpringBootApplication
public class Application extends SpringBootServletInitializer {
...
@Bean(name="conversionService")
public ConversionServiceFactoryBean getConversionService(StringToAssessmentConverter stringToAssessmentConverter) {
ConversionServiceFactoryBean bean = new ConversionServiceFactoryBean();
Set<Converter> converters = new HashSet<>();
converters.add(stringToAssessmentConverter);
bean.setConverters(converters);
return bean;
}
}
Here's the code for the Converter...
@Component
public class StringToAssessmentConverter implements Converter<String, Assessment> {
private AssessmentService assessmentService;
@Autowired
public StringToAssessmentConverter(AssessmentService assessmentService) {
this.assessmentService = assessmentService;
}
public Assessment convert(String source) {
Long id = Long.valueOf(source);
try {
return assessmentService.find(id);
} catch (SecurityException ex) {
return null;
}
}
}
Full Error
Failed to execute goal org.springframework.boot:spring-boot-maven-
plugin:1.3.2.RELEASE:run (default-cli) on project yrdstick: An exception
occurred while running. null: InvocationTargetException: Error creating
bean with name
'org.springframework.boot.context.properties.ConfigurationPropertiesBindingPo
stProcessor': Invocation of init method failed; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException: Error
creating bean with name 'conversionService' defined in
me.jpolete.yrdstick.Application: Unsatisfied dependency expressed through
constructor argument with index 0 of type
[me.jpolete.yrdstick.websupport.StringToAssessmentConverter]: : Error
creating bean with name 'stringToAssessmentConverter' defined in file
[/yrdstick/target/classes/me/jpolete/yrdstick/websupport
/StringToAssessmentConverter.class]: Instantiation of bean failed; nested
exception is org.springframework.beans.BeanInstantiationException: Failed
to instantiate
[me.jpolete.yrdstick.websupport.StringToAssessmentConverter]: No default
constructor found; nested exception is java.lang.NoSuchMethodException:
me.jpolete.yrdstick.websupport.StringToAssessmentConverter.<init>();
nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'stringToAssessmentConverter' defined in file [/yrdstick
/dev/yrdstick/target/classes/me/jpolete/yrdstick/websupport
/StringToAssessmentConverter.class]: Instantiation of bean failed; nested
exception is org.springframework.beans.BeanInstantiationException: Failed
to instantiate
[me.jpolete.yrdstick.websupport.StringToAssessmentConverter]: No default
constructor found; nested exception is java.lang.NoSuchMethodException:
me.jpolete.yrdstick.websupport.StringToAssessmentConverter.<init>()
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