net.fortytwo.stream.shj

Class Query<K,V>

java.lang.Object

net.fortytwo.stream.shj.Query<K,V>

All Implemented Interfaces:

Expirable

public class Query<K,V>
extends java.lang.Object
implements Expirable

Author:

Joshua Shinavier (http://fortytwo.net)

Constructor Summary

Constructors

Constructor and Description
Query(GraphPattern<K,V> graphPattern, long expirationTime, Index<Query<K,V>> expirationIndex, java.util.function.BiConsumer<java.util.Map<K,V>,java.lang.Long> solutionHandler)

Method Summary

Modifier and Type	Method and Description
void	expire() An operation to be executed when an item expires.
java.util.List<JoinHelper<K,V>>	getAllHelpers()
long	getExpirationTime() Gets the expiration time for this object
GraphPattern<K,V>	getGraphPattern()
boolean	isExpired() Tests the object for "tombstone" status
void	setAllHelpers(java.util.List<JoinHelper<K,V>> allHelpers)

Methods inherited from class java.lang.Object

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

Constructor Detail

Query

public Query(GraphPattern<K,V> graphPattern,
             long expirationTime,
             Index<Query<K,V>> expirationIndex,
             java.util.function.BiConsumer<java.util.Map<K,V>,java.lang.Long> solutionHandler)

Method Detail

getGraphPattern

public GraphPattern<K,V> getGraphPattern()

getExpirationTime

public long getExpirationTime()

Description copied from interface: Expirable

Gets the expiration time for this object

Specified by:

getExpirationTime in interface Expirable

Returns:

an expiration time, in milliseconds since the Unix epoch. The special value 0 indicates that the object is valid indefinitely.

expire

public void expire()

Description copied from interface: Expirable

An operation to be executed when an item expires. Turns the object into a "tombstone" which occupies minimal memory in the expiration heap. This is an alternative to removing an object from the heap, which is expensive; the tombstone exists until it expires, but must not be used.

Specified by:

expire in interface Expirable

isExpired

public boolean isExpired()

Description copied from interface: Expirable

Tests the object for "tombstone" status

Specified by:

isExpired in interface Expirable

Returns:

whether this object is a tombstone which must not be used

getAllHelpers

public java.util.List<JoinHelper<K,V>> getAllHelpers()

setAllHelpers

public void setAllHelpers(java.util.List<JoinHelper<K,V>> allHelpers)