Spring SimpleThreadScope

private final ThreadLocal<Map<String, Object>> threadScope =
      new NamedThreadLocal<Map<String, Object>>("SimpleThreadScope") {
         @Override
         protected Map<String, Object> initialValue() {
            return new HashMap<>();
         }
      };

@Override
public Object get(String name, ObjectFactory<?> objectFactory) {
   // ThreadLocal 中获取容器
   Map<String, Object> scope = this.threadScope.get();
   // 容器中获取
   Object scopedObject = scope.get(name);
   // 不存在
   if (scopedObject == null) {
      // 从 ObjectFactory 中获取
      scopedObject = objectFactory.getObject();
      // 设置到容器
      scope.put(name, scopedObject);
   }
   return scopedObject;
}

@Override
@Nullable
public Object remove(String name) {
   Map<String, Object> scope = this.threadScope.get();
   return scope.remove(name);
}

@Override
public String getConversationId() {
   return Thread.currentThread().getName();
}