net.fortytwo.stream

Class BasicStreamProcessor<R,C,Q,I,S>

java.lang.Object

net.fortytwo.stream.BasicStreamProcessor<R,C,Q,I,S>

Type Parameters:

R - the raw query type. A raw query is parsed to a constraint.

C - the constraint type. A constraint is translated into a native query.

Q - the native query type

I - the input type

S - the solution type

All Implemented Interfaces:

StreamProcessor<R,I,S>

public abstract class BasicStreamProcessor<R,C,Q,I,S>
extends Object
implements StreamProcessor<R,I,S>

Author:

Joshua Shinavier (http://fortytwo.net)

Nested Class Summary

Nested classes/interfaces inherited from interface net.fortytwo.stream.StreamProcessor

StreamProcessor.IncompatibleQueryException, StreamProcessor.InvalidQueryException

Field Summary

Fields inherited from interface net.fortytwo.stream.StreamProcessor

INFINITE_TTL, NEVER_EXPIRE

Constructor Summary

Constructors

Constructor and Description
BasicStreamProcessor()

Method Summary

Modifier and Type	Method and Description
abstract boolean	renew(BasicSubscription<C,Q,S> subscription, int ttl) Refreshes a subscription which has expired or is about to expire
abstract void	unregister(BasicSubscription<C,Q,S> subscription) Frees up the resources occupied by the provided subscription and prevents it from matching future inputs

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.fortytwo.stream.StreamProcessor

addInputs, addQuery, clear, setClock

Constructor Detail

BasicStreamProcessor

public BasicStreamProcessor()

Method Detail

unregister

public abstract void unregister(BasicSubscription<C,Q,S> subscription)

Frees up the resources occupied by the provided subscription and prevents it from matching future inputs

Parameters:

subscription - a query subscription to deactivate and remove

renew

public abstract boolean renew(BasicSubscription<C,Q,S> subscription,
                              int ttl)

Refreshes a subscription which has expired or is about to expire

Parameters:

subscription - the subscription to renew

ttl - a new time-to-live for the subscription, in seconds

Returns:

whether the subscription is successfully renewed. Renewal may or may not be possible, depending on the state of the subscription and the query engine.