com.vesoft.nebula.client.storage.scan

Class ScanResultIterator

java.lang.Object

com.vesoft.nebula.client.storage.scan.ScanResultIterator

Direct Known Subclasses:

ScanEdgeResultIterator, ScanVertexResultIterator

public class ScanResultIterator
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected List<HostAddress>	addresses
protected boolean	hasNext
protected String	labelName
protected MetaManager	metaManager
protected Map<Integer,byte[]>	partCursor
protected PartScanQueue	partScanQueue
protected boolean	partSuccess
protected StorageConnPool	pool
protected String	spaceName

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ScanResultIterator(MetaManager metaManager, StorageConnPool pool, PartScanQueue partScanQueue, List<HostAddress> addresses, String spaceName, String labelName, boolean partSuccess)

Method Summary

Modifier and Type	Method and Description
protected void	freshLeader(String spaceName, int part, HostAddr leader) fresh leader for part
protected HostAddress	getLeader(HostAddr leader)
protected void	handleFailedResult(ScanResponse response, PartScanInfo partInfo, List<Exception> exceptions)
protected void	handleNullResponse(PartScanInfo partInfo, List<Exception> exceptions)
protected void	handleNullResult(PartScanInfo partInfo, List<Exception> exceptions)
protected void	handleSucceedResult(AtomicInteger existSuccess, ScanResponse response, PartScanInfo partInfo)
boolean	hasNext() if iter has more vertex data
protected boolean	isSuccessful(ScanResponse response)
protected void	throwExceptions(List<Exception> exceptions)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

hasNext

protected boolean hasNext

partCursor

protected final Map<Integer,byte[]> partCursor

metaManager

protected final MetaManager metaManager

pool

protected final StorageConnPool pool

partScanQueue

protected final PartScanQueue partScanQueue

addresses

protected final List<HostAddress> addresses

spaceName

protected final String spaceName

labelName

protected final String labelName

partSuccess

protected final boolean partSuccess

Constructor Detail

ScanResultIterator

protected ScanResultIterator(MetaManager metaManager,
                             StorageConnPool pool,
                             PartScanQueue partScanQueue,
                             List<HostAddress> addresses,
                             String spaceName,
                             String labelName,
                             boolean partSuccess)

Method Detail

hasNext

public boolean hasNext()

if iter has more vertex data

Returns:

true if the scan cursor is not at end.

freshLeader

protected void freshLeader(String spaceName,
                           int part,
                           HostAddr leader)

fresh leader for part

Parameters:

spaceName - nebula graph space

part - part

leader - part new leader

getLeader

protected HostAddress getLeader(HostAddr leader)

handleNullResponse

protected void handleNullResponse(PartScanInfo partInfo,
                                  List<Exception> exceptions)

handleNullResult

protected void handleNullResult(PartScanInfo partInfo,
                                List<Exception> exceptions)

throwExceptions

protected void throwExceptions(List<Exception> exceptions)
                        throws ExecuteFailedException

Throws:

ExecuteFailedException

isSuccessful

protected boolean isSuccessful(ScanResponse response)

handleSucceedResult

protected void handleSucceedResult(AtomicInteger existSuccess,
                                   ScanResponse response,
                                   PartScanInfo partInfo)

handleFailedResult

protected void handleFailedResult(ScanResponse response,
                                  PartScanInfo partInfo,
                                  List<Exception> exceptions)