org.apache.hadoop.ipc

接口 VersionedProtocol

所有已知子接口:

AdminOperationsProtocol, ClientDatanodeProtocol, ClientProtocol, DatanodeProtocol, InterDatanodeProtocol, NamenodeProtocol, RefreshAuthorizationPolicyProtocol, RefreshUserMappingsProtocol, TaskUmbilicalProtocol

所有已知实现类:

DataNode, JobTracker, NameNode, TaskTracker

public interface VersionedProtocol

Superclass of all protocols that use Hadoop RPC. Subclasses of this interface are also supposed to have a static final long versionID field.

方法概要

方法

限定符和类型	方法和说明
long	getProtocolVersion(String protocol, long clientVersion) Return protocol version corresponding to protocol interface.

方法详细资料

getProtocolVersion

long getProtocolVersion(String protocol,
                      long clientVersion)
                        throws IOException

Return protocol version corresponding to protocol interface.

参数:

protocol - The classname of the protocol interface

clientVersion - The version of the protocol that the client speaks

返回:

the version that the server will speak

抛出:

IOException