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

Class GridCacheQueryAdapter<T>

java.lang.Object

org.apache.ignite.internal.processors.cache.query.GridCacheQueryAdapter<T>

All Implemented Interfaces:

CacheQuery<T>

public class GridCacheQueryAdapter<T>
extends Object
implements CacheQuery<T>

Query adapter.

Field Summary

Fields inherited from interface org.apache.ignite.internal.processors.cache.query.CacheQuery

DFLT_PAGE_SIZE

Constructor Summary

Constructors

Constructor and Description
GridCacheQueryAdapter(GridCacheContext<?,?> cctx, GridCacheQueryType type, IgniteLogger log, int pageSize, long timeout, boolean keepAll, boolean incBackups, boolean dedup, ClusterGroup prj, IgniteBiPredicate<Object,Object> filter, String clsName, String clause, boolean incMeta, boolean keepPortable, UUID subjId, int taskHash)
GridCacheQueryAdapter(GridCacheContext<?,?> cctx, GridCacheQueryType type, String clsName, String clause, IgniteBiPredicate<Object,Object> filter, boolean incMeta, boolean keepPortable)

Method Summary

Methods

Modifier and Type	Method and Description
String	clause()
boolean	enableDedup()
CacheQuery<T>	enableDedup(boolean dedup) Sets whether or not to deduplicate query result set.
<R> CacheQueryFuture<R>	execute(IgniteClosure<T,R> rmtTransform, Object... args) Executes the query the same way as CacheQuery.execute(Object...) method but transforms result remotely.
<R> CacheQueryFuture<R>	execute(IgniteReducer<T,R> rmtReducer, Object... args) Executes the query the same way as CacheQuery.execute(Object...) method but reduces result remotely.
CacheQueryFuture<T>	execute(Object... args) Executes the query and returns the query future.
boolean	includeBackups()
CacheQuery<T>	includeBackups(boolean incBackups) Sets whether or not to include backup entries into query result.
boolean	includeMetadata()
boolean	keepAll()
CacheQuery<T>	keepAll(boolean keepAll) Sets whether or not to keep all query results local.
boolean	keepPortable()
void	keepPortable(boolean keepPortable) Forces query to keep portable object representation even if query was created on plain projection.
QueryMetrics	metrics() Gets metrics for this query.
void	onExecuted(Object res, Throwable err, long startTime, long duration)
int	pageSize()
CacheQuery<T>	pageSize(int pageSize) Sets result page size.
ClusterGroup	projection()
CacheQuery<T>	projection(ClusterGroup prj) Sets optional grid projection to execute this query on.
String	queryClassName()
void	resetMetrics() Resets metrics for this query.
<K,V> IgniteBiPredicate<K,V>	scanFilter()
UUID	subjectId()
void	subjectId(UUID subjId)
int	taskHash()
long	timeout()
CacheQuery<T>	timeout(long timeout) Sets query timeout.
String	toString()
GridCacheQueryType	type()
void	validate()

Methods inherited from class java.lang.Object

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

Constructor Detail

GridCacheQueryAdapter

public GridCacheQueryAdapter(GridCacheContext<?,?> cctx,
                     GridCacheQueryType type,
                     @Nullable
                     String clsName,
                     @Nullable
                     String clause,
                     @Nullable
                     IgniteBiPredicate<Object,Object> filter,
                     boolean incMeta,
                     boolean keepPortable)

Parameters:

cctx - Context.

type - Query type.

clsName - Class name.

clause - Clause.

filter - Scan filter.

incMeta - Include metadata flag.

keepPortable - Keep portable flag.

GridCacheQueryAdapter

public GridCacheQueryAdapter(GridCacheContext<?,?> cctx,
                     GridCacheQueryType type,
                     IgniteLogger log,
                     int pageSize,
                     long timeout,
                     boolean keepAll,
                     boolean incBackups,
                     boolean dedup,
                     ClusterGroup prj,
                     IgniteBiPredicate<Object,Object> filter,
                     @Nullable
                     String clsName,
                     String clause,
                     boolean incMeta,
                     boolean keepPortable,
                     UUID subjId,
                     int taskHash)

Parameters:

cctx - Context.

prjPred - Cache projection filter.

type - Query type.

log - Logger.

pageSize - Page size.

timeout - Timeout.

keepAll - Keep all flag.

incBackups - Include backups flag.

dedup - Enable dedup flag.

prj - Grid projection.

filter - Key-value filter.

clsName - Class name.

clause - Clause.

incMeta - Include metadata flag.

keepPortable - Keep portable flag.

subjId - Security subject ID.

taskHash - Task hash.

Method Detail

type

public GridCacheQueryType type()

Returns:

Type.

queryClassName

@Nullable
public String queryClassName()

Returns:

Class name.

clause

@Nullable
public String clause()

Returns:

Clause.

includeMetadata

public boolean includeMetadata()

Returns:

Include metadata flag.

keepPortable

public boolean keepPortable()

Returns:

True if portable should not be deserialized.

keepPortable

public void keepPortable(boolean keepPortable)

Forces query to keep portable object representation even if query was created on plain projection.

Parameters:

keepPortable - Keep portable flag.

subjectId

public UUID subjectId()

Returns:

Security subject ID.

taskHash

public int taskHash()

Returns:

Task hash.

subjectId

public void subjectId(UUID subjId)

Parameters:

subjId - Security subject ID.

pageSize

public CacheQuery<T> pageSize(int pageSize)

Sets result page size. If not provided, CacheQuery.DFLT_PAGE_SIZE will be used. Results are returned from queried nodes one page at a tme.

Specified by:

pageSize in interface CacheQuery<T>

Parameters:

pageSize - Page size.

Returns:

this query instance for chaining.

pageSize

public int pageSize()

Returns:

Page size.

timeout

public CacheQuery<T> timeout(long timeout)

Sets query timeout. 0 means there is no timeout (this is a default value).

Specified by:

timeout in interface CacheQuery<T>

Parameters:

timeout - Query timeout.

Returns:

this query instance for chaining.

timeout

public long timeout()

Returns:

Timeout.

keepAll

public CacheQuery<T> keepAll(boolean keepAll)

Sets whether or not to keep all query results local. If not - only the current page is kept locally. Default value is true.

Specified by:

keepAll in interface CacheQuery<T>

Parameters:

keepAll - Keep results or not.

Returns:

this query instance for chaining.

keepAll

public boolean keepAll()

Returns:

Keep all flag.

includeBackups

public CacheQuery<T> includeBackups(boolean incBackups)

Sets whether or not to include backup entries into query result. This flag is false by default.

Specified by:

includeBackups in interface CacheQuery<T>

Parameters:

incBackups - Query includeBackups flag.

Returns:

this query instance for chaining.

includeBackups

public boolean includeBackups()

Returns:

Include backups.

enableDedup

public CacheQuery<T> enableDedup(boolean dedup)

Sets whether or not to deduplicate query result set. If this flag is true then query result will not contain some key more than once even if several nodes returned entries with the same keys. Default value is false.

Specified by:

enableDedup in interface CacheQuery<T>

Parameters:

dedup - Query enableDedup flag.

Returns:

this query instance for chaining.

enableDedup

public boolean enableDedup()

Returns:

Enable dedup flag.

projection

public CacheQuery<T> projection(ClusterGroup prj)

Sets optional grid projection to execute this query on.

Specified by:

projection in interface CacheQuery<T>

Parameters:

prj - Projection.

Returns:

this query instance for chaining.

projection

public ClusterGroup projection()

Returns:

Grid projection.

scanFilter

@Nullable
public <K,V> IgniteBiPredicate<K,V> scanFilter()

Returns:

Key-value filter.

validate

public void validate()
              throws IgniteCheckedException

Throws:

IgniteCheckedException - If query is invalid.

onExecuted

public void onExecuted(Object res,
              Throwable err,
              long startTime,
              long duration)

Parameters:

res - Query result.

err - Error or null if query executed successfully.

startTime - Start time.

duration - Duration.

execute

public CacheQueryFuture<T> execute(@Nullable
                          Object... args)

Executes the query and returns the query future. Caller may decide to iterate over the returned future directly in which case the iterator may block until the next value will become available, or wait for the whole query to finish by calling any of the 'get(..)' methods on the returned future. If CacheQuery.keepAll(boolean) flag is set to false, then 'get(..)' methods will only return the last page received, otherwise all pages will be accumulated and returned to user as a collection.

Note that if the passed in grid projection is a local node, then query will be executed locally without distribution to other nodes.

Also note that query state cannot be changed (clause, timeout etc.), except arguments, if this method was called at least once.

Specified by:

execute in interface CacheQuery<T>

Parameters:

args - Optional arguments.

Returns:

Future for the query result.

execute

public <R> CacheQueryFuture<R> execute(IgniteReducer<T,R> rmtReducer,
                              @Nullable
                              Object... args)

Executes the query the same way as CacheQuery.execute(Object...) method but reduces result remotely.

Specified by:

execute in interface CacheQuery<T>

Parameters:

rmtReducer - Remote reducer.

args - Optional arguments.

Returns:

Future for the query result.

execute

public <R> CacheQueryFuture<R> execute(IgniteClosure<T,R> rmtTransform,
                              @Nullable
                              Object... args)

Executes the query the same way as CacheQuery.execute(Object...) method but transforms result remotely.

Specified by:

execute in interface CacheQuery<T>

Parameters:

rmtTransform - Remote transformer.

args - Optional arguments.

Returns:

Future for the query result.

metrics

public QueryMetrics metrics()

Description copied from interface: CacheQuery

Gets metrics for this query.

Specified by:

metrics in interface CacheQuery<T>

Returns:

Query metrics.

resetMetrics

public void resetMetrics()

Description copied from interface: CacheQuery

Resets metrics for this query.

Specified by:

resetMetrics in interface CacheQuery<T>

toString

public String toString()

Overrides:

toString in class Object