org.eclipse.rdf4j.federated.structures

Class QueryInfo

java.lang.Object

org.eclipse.rdf4j.federated.structures.QueryInfo

public class QueryInfo
extends Object

Structure to maintain query information during evaluation, is attached to algebra nodes. Each instance is uniquely attached to the query. The queryId can be used to abort tasks belonging to a particular evaluation.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	done
protected static AtomicInteger	NEXT_QUERY_ID
protected Set<ParallelTask<?>>	scheduledSubtasks

Constructor Summary

Constructors

Constructor and Description
QueryInfo(Resource subj, IRI pred, Value obj, boolean includeInferred, FederationContext federationContext)
QueryInfo(String query, QueryType queryType, boolean incluedInferred, FederationContext federationContext)
QueryInfo(String query, QueryType queryType, int maxExecutionTime, boolean includeInferred, FederationContext federationContext)

Method Summary

Modifier and Type	Method and Description
void	abort() Mark the query as aborted and abort all scheduled (future) tasks known at this point in time.
protected void	abortScheduledTasks() Abort any scheduled future tasks
void	close() Close this query.
boolean	equals(Object obj)
FederationContext	getFederationContext()
boolean	getIncludeInferred()
long	getMaxRemainingTimeMS()
String	getQuery()
BigInteger	getQueryID()
QueryType	getQueryType()
int	hashCode()
void	registerScheduledTask(ParallelTask<?> task) Register a new scheduled task for this query.

Methods inherited from class java.lang.Object

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

Field Detail

NEXT_QUERY_ID

protected static final AtomicInteger NEXT_QUERY_ID

done

protected boolean done

scheduledSubtasks

protected Set<ParallelTask<?>> scheduledSubtasks

Constructor Detail

QueryInfo

public QueryInfo(String query,
                 QueryType queryType,
                 boolean incluedInferred,
                 FederationContext federationContext)

QueryInfo

public QueryInfo(String query,
                 QueryType queryType,
                 int maxExecutionTime,
                 boolean includeInferred,
                 FederationContext federationContext)

Parameters:

query -

queryType -

maxExecutionTime - the maximum explicit query time in seconds, if 0 use FedXConfig.getEnforceMaxQueryTime()

includeInferred - whether to include inferred statements

federationContext - the FederationContext

QueryInfo

public QueryInfo(Resource subj,
                 IRI pred,
                 Value obj,
                 boolean includeInferred,
                 FederationContext federationContext)

Method Detail

getQueryID

public BigInteger getQueryID()

getQuery

public String getQuery()

getQueryType

public QueryType getQueryType()

getIncludeInferred

public boolean getIncludeInferred()

getFederationContext

public FederationContext getFederationContext()

Returns:

the FederationContext in which this query is executed

getMaxRemainingTimeMS

public long getMaxRemainingTimeMS()

Returns:

the maximum remaining time in ms until the query runs into a timeout. If negative, timeout has been reached

registerScheduledTask

public void registerScheduledTask(ParallelTask<?> task)
                           throws QueryEvaluationException

Register a new scheduled task for this query.

Parameters:

task -

Throws:

QueryEvaluationException - if the query has been aborted or closed

abort

public void abort()

Mark the query as aborted and abort all scheduled (future) tasks known at this point in time. Also do not accept any new scheduled tasks

close

public void close()

Close this query. If exists, all scheduled (future) tasks known at this point in time are aborted. Also do not accept any new scheduled tasks

abortScheduledTasks

protected void abortScheduledTasks()

Abort any scheduled future tasks

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object