Package org.apache.hadoop.hdfs.qjournal.protocol

Interface InterQJournalProtocol

All Known Implementing Classes:

InterQJournalProtocolTranslatorPB, JournalNodeRpcServer

@Private
public interface InterQJournalProtocol

Protocol used to communicate between JournalNode for journalsync. This is responsible for sending edit log manifest.

Field Summary

Fields

Modifier and Type	Field	Description
static final long	versionID

Method Summary

Modifier and Type	Method	Description
QJournalProtocolProtos.GetEditLogManifestResponseProto	getEditLogManifestFromJournal(String jid, String nameServiceId, long sinceTxId, boolean inProgressOk)
org.apache.hadoop.hdfs.protocol.proto.HdfsServerProtos.StorageInfoProto	getStorageInfo(String jid, String nameServiceId)	Get the storage info for the specified journal.

Field Details

versionID

static final long versionID

See Also:

• Constant Field Values

Method Details

getEditLogManifestFromJournal

QJournalProtocolProtos.GetEditLogManifestResponseProto getEditLogManifestFromJournal(String jid,
 String nameServiceId,
 long sinceTxId,
 boolean inProgressOk)
                                                                              throws IOException

Parameters:

jid - the journal from which to enumerate edits

sinceTxId - the first transaction which the client cares about

inProgressOk - whether or not to check the in-progress edit log segment

Returns:

a list of edit log segments since the given transaction ID.

Throws:

IOException

getStorageInfo

org.apache.hadoop.hdfs.protocol.proto.HdfsServerProtos.StorageInfoProto getStorageInfo(String jid,
 String nameServiceId)
                                                                                throws IOException

Get the storage info for the specified journal.

Parameters:

jid - the journal identifier

nameServiceId - the name service id

Returns:

the storage info object

Throws:

IOException