org.apache.hadoop.ipc
Interface VersionedProtocol

All Known Subinterfaces:

AdminOperationsProtocol, RefreshAuthorizationPolicyProtocol, RefreshUserMappingsProtocol, TaskUmbilicalProtocol

All Known Implementing Classes:

JobTracker, 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.

Method Summary

long	getProtocolVersion(String protocol, long clientVersion) Return protocol version corresponding to protocol interface.

Method Detail

getProtocolVersion

long getProtocolVersion(String protocol,
                        long clientVersion)
                        throws IOException

Return protocol version corresponding to protocol interface.

Parameters:

protocol - The classname of the protocol interface

clientVersion - The version of the protocol that the client speaks

Returns:

the version that the server will speak

Throws:

IOException