CodeFetcher (ElastosHiveSDK v2.9.1 API)

所有已知实现类:

AccessToken
```
public interface CodeFetcher
```
CodeFetcher is for accessing the code by the network and can be invalidate.

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`java.lang.String`	`fetch()`	Fetch the code.
`void`	`invalidate()`	Invalidate the code for getting the code from remote server.

- 方法详细资料
  - fetch
```
java.lang.String fetch()
                throws NodeRPCException
```
    Fetch the code.
    
    返回:
    
    The code, MUST not be null.
    
    抛出:
    
    NodeRPCException - The exception shows the error returned by hive node.
  - invalidate
```
void invalidate()
```
    Invalidate the code for getting the code from remote server.