@Service(version = "1.0", group = "group1", interfaceClass = GroupService.class)
public class GroupServiceImp1 implements GroupService {

    @Override
    public List<User> getUserInfo() {
        ...
    }

}

@Service(version = "2.0", group = "group2", interfaceClass = GroupService.class)
public class GroupServiceImp2 implements GroupService {

    @Override
    public List<User> getUserInfo() {
        ...
    }

}

static <C extends AbstractConfig> void addIfAbsent(C config, Map<String, C> configsMap, boolean unique) throws IllegalStateException {
    if (config != null && configsMap != null) {       
         // 这里因为不同group的key是相同的，导致configsMap没有加入其它group的ServiceBean
        String key = getId(config);
        C existedConfig = (AbstractConfig)configsMap.get(key);
        if (existedConfig != null && !config.equals(existedConfig)) {
            if (logger.isWarnEnabled()) {
                String type = config.getClass().getSimpleName();
                logger.warn(...);
            }
        } else {
            configsMap.put(key, config);
        }

    }
}