Programmitacally generate multiple beans - spring

Question

I have multiple merchants and a WSDL with different configurations is needed for each merchant. Right now, I'm copying and pasting the following method and changing the configs. But it creates some difficulties (requires code change & deployment). I want to initialize it programmatically at the run time. I've tried these methods but it din't work.
Is it possible?
#Bean(name = "marchant-1")
public DefaultWsdl11Definition defaultWsdl11Definition(XsdSchema commonSchema) {
DefaultWsdl11Definition wsdl11Definition = new DefaultWsdl11Definition();
wsdl11Definition.setPortTypeName("Marchant1WSPort");
wsdl11Definition.setLocationUri("/Marchant1WebService");
wsdl11Definition.setTargetNamespace("http://.../");
wsdl11Definition.setSchema(commonSchema);
return wsdl11Definition;
}

Answer 1

I solved similar kind of problem by specifying scope of my bean as prototype. Below example explains my implementation:
Create your DefaultWsdl11Definition class as shown below:
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
#Component
#Scope("prototype")
#Getter
#Setter
public class DefaultWsdl11Definition {
private String portTypeName;
private String locationUri;
private String targetNamespace;
private XsdSchema schema;
}
Implement ApplicationContextAware to generate beans programmatically:
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Service;
#Service
public class ApplicationContextAwareImpl implements ApplicationContextAware {
private static ApplicationContext context;
#Override
public void setApplicationContext(ApplicationContext applicationContext) {
ApplicationContextAwareImpl.initApplicationContext(applicationContext);
}
private static void initApplicationContext(ApplicationContext applicationContext) {
ApplicationContextAwareImpl.context = applicationContext;
}
/**
* #param requiredType Bean class
*
* #return Bean of required type
*/
public static <T> T getBean(Class<T> requiredType) {
return context.getBean(requiredType);
}
}
Use ApplicationContextAwareImpl.getBean() method to generate beans programmatically:
DefaultWsdl11Definition wsdl11Definition = ApplicationContextAwareImpl.getBean(DefaultWsdl11Definition.class);
wsdl11Definition.setPortTypeName("Marchant1WSPort");
wsdl11Definition.setLocationUri("/Marchant1WebService");
wsdl11Definition.setTargetNamespace("http://.../");
wsdl11Definition.setSchema(commonSchema);
Also you can make use of Qualifier and Bean annotations to generate multiple beans of same type:
#Configuration
public class BeanConfigurations {
#Qualifier("marchant-1")
#Bean(name = "marchant-1")
public DefaultWsdl11Definition defaultWsdl11Definition1(XsdSchema commonSchema) {
DefaultWsdl11Definition wsdl11Definition = new DefaultWsdl11Definition();
wsdl11Definition.setPortTypeName("Marchant1WSPort");
wsdl11Definition.setLocationUri("/Marchant1WebService");
wsdl11Definition.setTargetNamespace("http://.../");
wsdl11Definition.setSchema(commonSchema);
return wsdl11Definition;
}
#Qualifier("marchant-2")
#Bean(name = "marchant-2")
public DefaultWsdl11Definition defaultWsdl11Definition2(XsdSchema commonSchema) {
DefaultWsdl11Definition wsdl11Definition = new DefaultWsdl11Definition();
wsdl11Definition.setPortTypeName("Marchant2WSPort");
wsdl11Definition.setLocationUri("/Marchant2WebService");
wsdl11Definition.setTargetNamespace("http://.../");
wsdl11Definition.setSchema(commonSchema);
return wsdl11Definition;
}
}

Answer 2

This solution worked for me:
#Configuration
public class WsBeanLoader implements BeanDefinitionRegistryPostProcessor {
#Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
SimpleXsdSchema xsd = new SimpleXsdSchema(new ClassPathResource("xsd/sample.xsd"));
xsd.afterPropertiesSet();
BeanDefinitionBuilder builder = builder(name, xsd);
registry.registerBeanDefinition(name, builder.getBeanDefinition());
}
private BeanDefinitionBuilder builder(String name, SimpleXsdSchema xsd) {
name = StringUtils.capitalize(name);
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(DefaultWsdl11Definition.class);
builder.addPropertyValue("serviceName", name + "WebService");
builder.addPropertyValue("portTypeName", name + "WSPortBinding");
builder.addPropertyValue("locationUri", "/WS/" + name + "WS");
builder.addPropertyValue("targetNamespace", "url..");
builder.addPropertyValue("schema", xsd);
return builder;
}
#Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
}
}