Package jline.api.sn

Class SnHasImmfeed

java.lang.Object

jline.api.sn.SnHasImmfeed

public final class SnHasImmfeed
extends Object

Method Summary

Modifier and Type	Method	Description
static boolean	snHasImmfeed(NetworkStruct sn)	Whether immediate feedback is EFFECTIVE anywhere in the model.

Methods inherited from class java.lang.Object

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

Method Details

snHasImmfeed

public static boolean snHasImmfeed(NetworkStruct sn)

Whether immediate feedback is EFFECTIVE anywhere in the model. A declaration alone is not enough. Queue.setImmediateFeedback marks a station and JobClass.setImmediateFeedback marks a class -- and the class spelling marks EVERY station, since sn.immfeed is the OR of the two -- so a model with no self-loop at all can carry a full sn.immfeed matrix while the feature changes nothing. Reading the raw matrix made every solver that consults it warn, or refuse, on a plain M/M/1 that merely mentioned the flag. Immediate feedback is effective at (station i, class r) when sn.immfeed(i,r) holds AND the routing table has a self-loop INTO (i,r) from some class s at the same station, which is the only way a job can come back to the server it just left. A class switch on the way round is folded into sn.rt by refreshRouting, so the incoming class s need not be r. Solvers that handle immediate feedback look at the SYNCHRONIZATION instead; see State.immfeedSelfLoop, which applies the same test per sync.

Parameters:

sn - - NetworkStruct object for the queueing network model

Returns:

boolean