org.apache.ignite.internal.processors.cache.query

Class GridCacheQueryFutureAdapter<K,V,R>

java.lang.Object

org.apache.ignite.internal.util.future.GridFutureAdapter<Collection<R>>

org.apache.ignite.internal.processors.cache.query.GridCacheQueryFutureAdapter<K,V,R>

Type Parameters:

R - Result type.

All Implemented Interfaces:

AutoCloseable, IgniteInternalFuture<Collection<R>>, CacheQueryFuture<R>, GridTimeoutObject

Direct Known Subclasses:

GridCacheDistributedQueryFuture, GridCacheLocalQueryFuture

public abstract class GridCacheQueryFutureAdapter<K,V,R>
extends GridFutureAdapter<Collection<R>>
implements CacheQueryFuture<R>, GridTimeoutObject

Query future adapter.

Field Summary

Fields

Modifier and Type	Field and Description
protected GridCacheContext<K,V>	cctx Cache context.
protected boolean	loc
protected static IgniteLogger	log Logger.
protected GridCacheQueryBean	qry

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GridCacheQueryFutureAdapter()
protected	GridCacheQueryFutureAdapter(GridCacheContext<K,V> cctx, GridCacheQueryBean qry, boolean loc)

Method Summary

Modifier and Type	Method and Description
abstract void	awaitFirstPage() Waits for the first page to be received from remote node(s), if any.
boolean	cancel() Default no-op implementation that always returns false.
protected abstract void	cancelQuery()
void	close()
long	endTime()
protected void	enqueue(Collection<?> col)
Collection<R>	get() Synchronously waits for completion of the computation and returns computation result.
Collection<R>	get(long timeout, TimeUnit unit) Synchronously waits for completion of the computation for up to the timeout specified and returns computation result.
Collection<R>	getUninterruptibly() Synchronously waits for completion of the computation and returns computation result ignoring interrupts.
protected abstract void	loadAllPages() Loads all left pages.
protected abstract void	loadPage() Loads next page.
R	next() Returns next element from result set.
boolean	onDone(Collection<R> res, Throwable err) Callback to notify that future is finished.
protected void	onNodeLeft(UUID evtNodeId)
protected abstract boolean	onPage(UUID nodeId, boolean last)
void	onPage(@Nullable UUID nodeId, @Nullable Collection<?> data, @Nullable Throwable err, boolean finished)
void	onTimeout() Timeout callback.
void	printMemoryStats()
GridCacheQueryBean	query()
IgniteUuid	timeoutId()
String	toString()

Methods inherited from class org.apache.ignite.internal.util.future.GridFutureAdapter

chain, chain, error, get, ignoreInterrupts, isCancelled, isDone, isFailed, listen, logger, onCancelled, onDone, onDone, onDone, onDone, reset, result

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.internal.processors.cache.query.CacheQueryFuture

isDone

Methods inherited from interface org.apache.ignite.internal.IgniteInternalFuture

chain, chain, error, get, isCancelled, listen, result

Field Detail

log

protected static IgniteLogger log

Logger.

cctx

protected GridCacheContext<K,V> cctx

Cache context.

qry

protected final GridCacheQueryBean qry

loc

protected boolean loc

Constructor Detail

GridCacheQueryFutureAdapter

protected GridCacheQueryFutureAdapter()

GridCacheQueryFutureAdapter

protected GridCacheQueryFutureAdapter(GridCacheContext<K,V> cctx,
                                      GridCacheQueryBean qry,
                                      boolean loc)

Parameters:

cctx - Context.

qry - Query.

loc - Local query or not.

Method Detail

query

public GridCacheQueryBean query()

Returns:

Query.

onDone

public boolean onDone(Collection<R> res,
                      Throwable err)

Callback to notify that future is finished. Note that if non-null exception is passed in the result value will be ignored.

Overrides:

onDone in class GridFutureAdapter<Collection<R>>

Parameters:

res - Optional result.

err - Optional error.

Returns:

True if result was set by this call.

next

public R next()

Returns next element from result set.

This is a blocking call which will wait if there are no elements available immediately.

Specified by:

next in interface CacheQueryFuture<R>

Returns:

Next fetched element or null if all the elements have been fetched.

awaitFirstPage

public abstract void awaitFirstPage()
                             throws IgniteCheckedException

Waits for the first page to be received from remote node(s), if any.

Throws:

IgniteCheckedException - If query execution failed with an error.

onNodeLeft

protected void onNodeLeft(UUID evtNodeId)

Parameters:

evtNodeId - Removed or failed node Id.

enqueue

protected void enqueue(Collection<?> col)

Parameters:

col - Collection.

onPage

public void onPage(@Nullable
                   @Nullable UUID nodeId,
                   @Nullable
                   @Nullable Collection<?> data,
                   @Nullable
                   @Nullable Throwable err,
                   boolean finished)

Parameters:

nodeId - Sender node.

data - Page data.

err - Error (if was).

finished - Finished or not.

get

public Collection<R> get()
                  throws IgniteCheckedException

Synchronously waits for completion of the computation and returns computation result.

Specified by:

get in interface IgniteInternalFuture<Collection<R>>

Overrides:

get in class GridFutureAdapter<Collection<R>>

Returns:

Computation result.

Throws:

IgniteInterruptedCheckedException - Subclass of IgniteCheckedException thrown if the wait was interrupted.

IgniteFutureCancelledCheckedException - Subclass of IgniteCheckedException throws if computation was cancelled.

IgniteCheckedException - If computation failed.

get

public Collection<R> get(long timeout,
                         TimeUnit unit)
                  throws IgniteCheckedException

Synchronously waits for completion of the computation for up to the timeout specified and returns computation result.

Specified by:

get in interface IgniteInternalFuture<Collection<R>>

Overrides:

get in class GridFutureAdapter<Collection<R>>

Parameters:

timeout - The maximum time to wait.

unit - The time unit of the timeout argument.

Returns:

Computation result.

Throws:

IgniteInterruptedCheckedException - Subclass of IgniteCheckedException thrown if the wait was interrupted.

IgniteFutureTimeoutCheckedException - Subclass of IgniteCheckedException thrown if the wait was timed out.

IgniteFutureCancelledCheckedException - Subclass of IgniteCheckedException throws if computation was cancelled.

IgniteCheckedException - If computation failed.

getUninterruptibly

public Collection<R> getUninterruptibly()
                                 throws IgniteCheckedException

Synchronously waits for completion of the computation and returns computation result ignoring interrupts.

Specified by:

getUninterruptibly in interface IgniteInternalFuture<Collection<R>>

Overrides:

getUninterruptibly in class GridFutureAdapter<Collection<R>>

Returns:

Computation result.

Throws:

IgniteFutureCancelledCheckedException - Subclass of IgniteCheckedException throws if computation was cancelled.

IgniteCheckedException - If computation failed.

onPage

protected abstract boolean onPage(UUID nodeId,
                                  boolean last)

Parameters:

nodeId - Sender node id.

last - Whether page is last.

Returns:

Is query finished or not.

loadPage

protected abstract void loadPage()

Loads next page.

loadAllPages

protected abstract void loadAllPages()
                              throws IgniteInterruptedCheckedException

Loads all left pages.

Throws:

IgniteInterruptedCheckedException - If thread is interrupted.

cancel

public boolean cancel()
               throws IgniteCheckedException

Default no-op implementation that always returns false. Futures that do support cancellation should override this method and call GridFutureAdapter.onCancelled() callback explicitly if cancellation indeed did happen.

Specified by:

cancel in interface IgniteInternalFuture<Collection<R>>

Specified by:

cancel in interface CacheQueryFuture<R>

Overrides:

cancel in class GridFutureAdapter<Collection<R>>

Returns:

True if future was canceled (i.e. was not finished prior to this call).

Throws:

IgniteCheckedException - If cancellation failed.

cancelQuery

protected abstract void cancelQuery()
                             throws IgniteCheckedException

Throws:

IgniteCheckedException - In case of error.

timeoutId

public IgniteUuid timeoutId()

Specified by:

timeoutId in interface GridTimeoutObject

Returns:

ID of the object.

endTime

public long endTime()

Specified by:

endTime in interface GridTimeoutObject

Returns:

End time.

onTimeout

public void onTimeout()

Timeout callback.

Specified by:

onTimeout in interface GridTimeoutObject

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception

toString

public String toString()

Overrides:

toString in class GridFutureAdapter<Collection<R>>

printMemoryStats

public void printMemoryStats()