org.apache.ignite.internal.processors.cache.distributed.dht.preloader

Class GridDhtPreloader

java.lang.Object

org.apache.ignite.internal.processors.cache.GridCachePreloaderAdapter

org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPreloader

All Implemented Interfaces:

GridCachePreloader

public class GridDhtPreloader
extends GridCachePreloaderAdapter

DHT cache preloader.

Field Summary

Fields

Modifier and Type	Field and Description
static long	DFLT_PRELOAD_RESEND_TIMEOUT Default preload resend timeout.

Fields inherited from class org.apache.ignite.internal.processors.cache.GridCachePreloaderAdapter

ctx, grp, log

Constructor Summary

Constructors

Constructor and Description
GridDhtPreloader(CacheGroupContext grp)

Method Summary

Modifier and Type	Method and Description
Runnable	addAssignments(GridDhtPreloaderAssignments assignments, boolean forceRebalance, long rebalanceId, Runnable next, @Nullable GridCompoundFuture<Boolean,Boolean> forcedRebFut) Adds assignments to preloader.
IgniteInternalFuture<Boolean>	forceRebalance() Force Rebalance process.
GridDhtPreloaderAssignments	generateAssignments(GridDhtPartitionExchangeId exchId, GridDhtPartitionsExchangeFuture exchFut)
void	handleDemandMessage(int idx, UUID nodeId, GridDhtPartitionDemandMessage d) Handles Demand message.
void	handleSupplyMessage(UUID nodeId, GridDhtPartitionSupplyMessage s) Handles Supply message.
boolean	needForceKeys()
void	onInitialExchangeComplete(@Nullable Throwable err) Callback by exchange manager when initial partition exchange is complete.
void	onKernalStop() Kernal stop callback.
void	onPartitionEvicted(GridDhtLocalPartition part, boolean updateSeq) Resends partitions on partition evict within configured timeout.
void	onReconnected() Client reconnected callback.
void	onTopologyChanged(GridDhtPartitionsExchangeFuture lastFut)
void	pause() Pause preloader.
IgniteInternalFuture<Boolean>	rebalanceFuture()
boolean	rebalanceRequired(AffinityTopologyVersion rebTopVer, GridDhtPartitionsExchangeFuture exchFut)
GridDhtFuture<Object>	request(GridCacheContext cctx, Collection<KeyCacheObject> keys, AffinityTopologyVersion topVer) Requests that preloader sends the request for the key.
GridDhtFuture<Object>	request(GridCacheContext cctx, GridNearAtomicAbstractUpdateRequest req, AffinityTopologyVersion topVer) Requests that preloader sends the request for the key.
void	resume() Resume preloader.
void	start() Starts preloading.
IgniteInternalFuture<Object>	startFuture()
IgniteInternalFuture<?>	syncFuture()

Methods inherited from class org.apache.ignite.internal.processors.cache.GridCachePreloaderAdapter

batchesPrefetchCount, batchSize, dumpDebugInfo, throttle, timeout

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_PRELOAD_RESEND_TIMEOUT

public static final long DFLT_PRELOAD_RESEND_TIMEOUT

Default preload resend timeout.

See Also:

Constant Field Values

Constructor Detail

GridDhtPreloader

public GridDhtPreloader(CacheGroupContext grp)

Parameters:

grp - Cache group.

Method Detail

start

public void start()

Starts preloading.

Specified by:

start in interface GridCachePreloader

Overrides:

start in class GridCachePreloaderAdapter

onKernalStop

public void onKernalStop()

Kernal stop callback.

Specified by:

onKernalStop in interface GridCachePreloader

Overrides:

onKernalStop in class GridCachePreloaderAdapter

onInitialExchangeComplete

public void onInitialExchangeComplete(@Nullable
                                      @Nullable Throwable err)

Callback by exchange manager when initial partition exchange is complete.

Specified by:

onInitialExchangeComplete in interface GridCachePreloader

Overrides:

onInitialExchangeComplete in class GridCachePreloaderAdapter

Parameters:

err - Error, if any happened on initial exchange.

onTopologyChanged

public void onTopologyChanged(GridDhtPartitionsExchangeFuture lastFut)

Specified by:

onTopologyChanged in interface GridCachePreloader

Overrides:

onTopologyChanged in class GridCachePreloaderAdapter

Parameters:

lastFut - Last future.

rebalanceRequired

public boolean rebalanceRequired(AffinityTopologyVersion rebTopVer,
                                 GridDhtPartitionsExchangeFuture exchFut)

Specified by:

rebalanceRequired in interface GridCachePreloader

Overrides:

rebalanceRequired in class GridCachePreloaderAdapter

Parameters:

rebTopVer - Previous rebalance topology version or NONE if there is no info.

exchFut - Completed exchange future.

Returns:

True if rebalance should be started (previous will be interrupted).

generateAssignments

public GridDhtPreloaderAssignments generateAssignments(GridDhtPartitionExchangeId exchId,
                                                       GridDhtPartitionsExchangeFuture exchFut)

Specified by:

generateAssignments in interface GridCachePreloader

Overrides:

generateAssignments in class GridCachePreloaderAdapter

Parameters:

exchId - Exchange ID.

exchFut - Completed exchange future. Can be null if forced or reassigned generation occurs.

Returns:

Partition assignments which will be requested from supplier nodes.

onReconnected

public void onReconnected()

Client reconnected callback.

Specified by:

onReconnected in interface GridCachePreloader

Overrides:

onReconnected in class GridCachePreloaderAdapter

handleSupplyMessage

public void handleSupplyMessage(UUID nodeId,
                                GridDhtPartitionSupplyMessage s)

Handles Supply message.

Specified by:

handleSupplyMessage in interface GridCachePreloader

Overrides:

handleSupplyMessage in class GridCachePreloaderAdapter

Parameters:

nodeId - Node Id.

s - Supply message.

handleDemandMessage

public void handleDemandMessage(int idx,
                                UUID nodeId,
                                GridDhtPartitionDemandMessage d)

Handles Demand message.

Specified by:

handleDemandMessage in interface GridCachePreloader

Overrides:

handleDemandMessage in class GridCachePreloaderAdapter

Parameters:

idx - Index.

nodeId - Node Id.

d - Demand message.

addAssignments

public Runnable addAssignments(GridDhtPreloaderAssignments assignments,
                               boolean forceRebalance,
                               long rebalanceId,
                               Runnable next,
                               @Nullable
                               @Nullable GridCompoundFuture<Boolean,Boolean> forcedRebFut)

Adds assignments to preloader.

Specified by:

addAssignments in interface GridCachePreloader

Overrides:

addAssignments in class GridCachePreloaderAdapter

Parameters:

assignments - Assignments to add.

forceRebalance - True if preload requested by ForceRebalanceExchangeTask.

rebalanceId - Rebalance id created by exchange thread.

next - Runnable responsible for cache rebalancing chain.

forcedRebFut - External future for forced rebalance.

Returns:

Rebalancing runnable.

startFuture

public IgniteInternalFuture<Object> startFuture()

Description copied from class: GridCachePreloaderAdapter

Specified by:

startFuture in interface GridCachePreloader

Overrides:

startFuture in class GridCachePreloaderAdapter

Returns:

Start future.

syncFuture

public IgniteInternalFuture<?> syncFuture()

Specified by:

syncFuture in interface GridCachePreloader

Overrides:

syncFuture in class GridCachePreloaderAdapter

Returns:

Future which will complete when preloading is finished.

rebalanceFuture

public IgniteInternalFuture<Boolean> rebalanceFuture()

Specified by:

rebalanceFuture in interface GridCachePreloader

Overrides:

rebalanceFuture in class GridCachePreloaderAdapter

Returns:

Future which will complete when preloading finishes on current topology. Future result is true in case rebalancing successfully finished at current topology. Future result is false in case rebalancing cancelled or finished with missed partitions and will be restarted at current or pending topology.

onPartitionEvicted

public void onPartitionEvicted(GridDhtLocalPartition part,
                               boolean updateSeq)

Resends partitions on partition evict within configured timeout.

Parameters:

part - Evicted partition.

updateSeq - Update sequence.

needForceKeys

public boolean needForceKeys()

Specified by:

needForceKeys in interface GridCachePreloader

Overrides:

needForceKeys in class GridCachePreloaderAdapter

Returns:

true if there is no need to force keys preloading (e.g. rebalancing has been completed).

request

public GridDhtFuture<Object> request(GridCacheContext cctx,
                                     GridNearAtomicAbstractUpdateRequest req,
                                     AffinityTopologyVersion topVer)

Requests that preloader sends the request for the key.

Specified by:

request in interface GridCachePreloader

Overrides:

request in class GridCachePreloaderAdapter

Parameters:

cctx - Cache context.

req - Message with keys to request.

topVer - Topology version, -1 if not required.

Returns:

Future to complete when all keys are preloaded.

request

public GridDhtFuture<Object> request(GridCacheContext cctx,
                                     Collection<KeyCacheObject> keys,
                                     AffinityTopologyVersion topVer)

Description copied from class: GridCachePreloaderAdapter

Requests that preloader sends the request for the key.

Specified by:

request in interface GridCachePreloader

Overrides:

request in class GridCachePreloaderAdapter

Parameters:

keys - Keys to request.

cctx - Cache context.

topVer - Topology version, -1 if not required.

Returns:

Future for request.

forceRebalance

public IgniteInternalFuture<Boolean> forceRebalance()

Force Rebalance process.

Specified by:

forceRebalance in interface GridCachePreloader

Overrides:

forceRebalance in class GridCachePreloaderAdapter

pause

public void pause()

Pause preloader.

Specified by:

pause in interface GridCachePreloader

Overrides:

pause in class GridCachePreloaderAdapter

resume

public void resume()

Resume preloader.

Specified by:

resume in interface GridCachePreloader

Overrides:

resume in class GridCachePreloaderAdapter