@Override
protected Set<BeanDefinitionHolder> doScan(String... basePackages) {
Assert.notEmpty(basePackages, "At least one base package must be specified");
Set<BeanDefinitionHolder> beanDefinitions = new LinkedHashSet<BeanDefinitionHolder>();
for (String basePackage : basePackages) {
Set<BeanDefinition> candidates = findCandidateComponents(basePackage);
for (BeanDefinition candidate : candidates) {
ScopeMetadata scopeMetadata = this.scopeMetadataResolver.resolveScopeMetadata(candidate);
candidate.setScope(scopeMetadata.getScopeName());
String beanName = this.beanNameGenerator.generateBeanName(candidate, this.registry);
if (candidate instanceof AbstractBeanDefinition) {
postProcessBeanDefinition((AbstractBeanDefinition) candidate, beanName);
}
if (candidate instanceof AnnotatedBeanDefinition) {
processCommonDefinitionAnnotations((AnnotatedBeanDefinition) candidate);
}
ScannedGenericBeanDefinition bd = (ScannedGenericBeanDefinition) candidate; // 通用bean扫描
bd.setBeanClassName(HessianServiceExporter.class.getName()); // 设置bean名称
bd.setBeanClass(HessianServiceExporter.class); // 设置bean类
bd.getPropertyValues().add("service", registry.getBeanDefinition(beanName)); // 设置属性 service
String[] interfaces = bd.getMetadata().getInterfaceNames(); // 获得元数据、接口名称
if (interfaces == null || interfaces.length == 0) continue;
Class interf = null;
try {
interf = Class.forName(interfaces[0]); // 获得接口
} catch (ClassNotFoundException e) {
continue;
}
bd.getPropertyValues().add("serviceInterface", interf); // 设置属性 serviceInterface
candidate = bd;
BeanDefinitionHolder definitionHolder =
new BeanDefinitionHolder(candidate, "/" + beanName); // 新bean定义持有
definitionHolder =
applyScopedProxyMode(scopeMetadata, definitionHolder, this.registry); // 应用范围代理模式
beanDefinitions.add(definitionHolder); // 将bean定义持有放入bean定义持有set中
registerBeanDefinition(definitionHolder, this.registry); // 注册bean定义
}
}
if (beanDefinitions.isEmpty()) {
System.out.println("not service be scaned");
} else {
for (BeanDefinitionHolder holder : beanDefinitions) {
AnnotatedBeanDefinition definition =
(AnnotatedBeanDefinition) holder.getBeanDefinition(); // 注释的bean定义
System.out.println("service:" + holder.getBeanName()); // 注释的bean定义名称
System.out.println(
"service:" + definition.getMetadata().getAnnotationTypes()); // 注释的bean定义类型
}
}
return beanDefinitions;
}
BeanDefinitionHolder applyScopedProxyMode( // 应用范围代理模式
ScopeMetadata metadata, BeanDefinitionHolder definition, BeanDefinitionRegistry registry) {
ScopedProxyMode scopedProxyMode = metadata.getScopedProxyMode(); // 范围代理模式
if (scopedProxyMode.equals(ScopedProxyMode.NO)) {
return definition;
}
boolean proxyTargetClass = scopedProxyMode.equals(ScopedProxyMode.TARGET_CLASS);
return ScopedProxyUtils.createScopedProxy(
definition, registry, proxyTargetClass); // 创建限定了作用域的代理
}