Returns the total number of values across all keys. <p> Note: In concurrent scenarios, the returned value is a best-effort approximation. </p>

replace valueOf in enum But what would happened if environment not exist? @param name @return @throws IllegalArgumentException if this existed enviro

Not just name in Env, the address of Env must be same, or it will throw {@code RuntimeException} @param o @return @throws RuntimeException When same

封装{@link org.springframework.beans.BeanUtils#copyProperties}，惯用与直接将转换结果返回 <pre> UserBean userBean = new UserBean("username"); return BeanUt

Tag a service instance for service discovery. <p/> so use cluster for service discovery. @return The cluster of the service instance.

find by {@link ApolloServiceRegistryProperties#getServiceName()}, then filter by {@link ApolloServiceRegistryProperties#getCluster()} @return empty l

Assemble watch keys for the given appId, cluster, namespace, dataCenter combination

<pre> List<UserBean> userBeans = userDao.queryUsers(); List<UserDTO> userDTOs = BeanUtil.batchTransform(UserDTO.class, userBeans); </pre>

Load config @param clientAppId the client's app id @param clientIp the client ip @param clientLabel the client label @param configAppId the requested

Find role by role name, note that roleName should be unique

获取某个对象的某个属性

@param serviceId the service id @return the service instance list for the specified service id, or an empty list if no service instance available

Write authentication source identifier for current thread

Assign role to users @return the users assigned roles

Check if user has any of the given permissions

a Env convert to string, ie its name. @return