org.apache.ignite.internal.processors.query.h2.twostep

Class PartitionReservationManager

java.lang.Object

org.apache.ignite.internal.processors.query.h2.twostep.PartitionReservationManager

All Implemented Interfaces:

PartitionsExchangeAware

public class PartitionReservationManager
extends Object
implements PartitionsExchangeAware

Class responsible for partition reservation for queries executed on local node. Prevents partitions from being evicted from node during query execution.

Constructor Summary

Constructors

Constructor and Description
PartitionReservationManager(GridKernalContext ctx) Constructor.

Method Summary

Modifier and Type	Method and Description
void	onCacheStop(String cacheName)
void	onDoneAfterTopologyUnlock(GridDhtPartitionsExchangeFuture fut) Cleanup group reservations cache on change affinity version.
PartitionReservation	reservePartitions(@Nullable List<Integer> cacheIds, AffinityTopologyVersion reqTopVer, int[] explicitParts, UUID nodeId, long reqId)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.internal.processors.cache.distributed.dht.preloader.PartitionsExchangeAware

onDoneBeforeTopologyUnlock, onInitAfterTopologyLock, onInitBeforeTopologyLock, onPartitionStatesRestored

Constructor Detail

PartitionReservationManager

public PartitionReservationManager(GridKernalContext ctx)

Constructor.

Parameters:

ctx - Context.

Method Detail

reservePartitions

public PartitionReservation reservePartitions(@Nullable
                                              @Nullable List<Integer> cacheIds,
                                              AffinityTopologyVersion reqTopVer,
                                              int[] explicitParts,
                                              UUID nodeId,
                                              long reqId)
                                       throws IgniteCheckedException

Parameters:

cacheIds - Cache IDs.

reqTopVer - Topology version from request.

explicitParts - Explicit partitions list.

nodeId - Node ID.

reqId - Request ID.

Returns:

String which is null in case of success or with causeMessage if failed

Throws:

IgniteCheckedException - If failed.

onCacheStop

public void onCacheStop(String cacheName)

Parameters:

cacheName - Cache name.

onDoneAfterTopologyUnlock

public void onDoneAfterTopologyUnlock(GridDhtPartitionsExchangeFuture fut)

Cleanup group reservations cache on change affinity version.

Specified by:

onDoneAfterTopologyUnlock in interface PartitionsExchangeAware