/**
* Returns current typed flow entry's polling interval.
*
* @param tfe typed flow entry
*/
public static long typedPollInterval(TypedStoredFlowEntry tfe) {
checkNotNull(tfe, "TypedStoredFlowEntry cannot be null");
switch (tfe.flowLiveType()) {
case LONG_FLOW:
return LONG_POLL_INTERVAL;
case MID_FLOW:
return MID_POLL_INTERVAL;
case SHORT_FLOW:
case IMMEDIATE_FLOW:
default:
return CAL_AND_POLL_INTERVAL;
}
}
// In real, calculates and set the flow live type at the first time,
// and then add it into a corresponding typed flow table
private void calAndSetFlowLiveTypeInternal(TypedStoredFlowEntry rule) {
long life = rule.life();
FlowLiveType prevFlowLiveType = rule.flowLiveType();
if (life >= longPollInterval) {
rule.setFlowLiveType(FlowLiveType.LONG_FLOW);
longFlows.add(rule);
} else if (life >= midPollInterval) {
rule.setFlowLiveType(FlowLiveType.MID_FLOW);
midFlows.add(rule);
} else if (life >= calAndPollInterval) {
rule.setFlowLiveType(FlowLiveType.SHORT_FLOW);
shortFlows.add(rule);
} else if (life >= 0) {
rule.setFlowLiveType(FlowLiveType.IMMEDIATE_FLOW);
} else { // life < 0
rule.setFlowLiveType(FlowLiveType.UNKNOWN_FLOW);
}
if (rule.flowLiveType() != prevFlowLiveType) {
switch (prevFlowLiveType) {
// delete it from previous flow table
case SHORT_FLOW:
shortFlows.remove(rule);
break;
case MID_FLOW:
midFlows.remove(rule);
break;
case LONG_FLOW:
longFlows.remove(rule);
break;
default:
break;
}
}
}
// Remove the typed flow entry from corresponding table
private void removeLiveFlowsInternal(TypedStoredFlowEntry fe) {
switch (fe.flowLiveType()) {
case IMMEDIATE_FLOW:
// do nothing
break;
case SHORT_FLOW:
shortFlows.remove(fe);
break;
case MID_FLOW:
midFlows.remove(fe);
break;
case LONG_FLOW:
longFlows.remove(fe);
break;
default: // error in Flow Live Type
log.error("removeLiveFlowsInternal, Unknown Live Type error!");
break;
}
}
// check the flow live type based on current time, then set and add it into corresponding table
private boolean checkAndMoveLiveFlowInternal(TypedStoredFlowEntry fe, long cTime) {
long curTime = (cTime > 0 ? cTime : System.currentTimeMillis());
// For latency adjustment(default=500 millisecond) between FlowStatsRequest and Reply
long fromLastSeen =
((curTime - fe.lastSeen() + latencyFlowStatsRequestAndReplyMillis) / 1000);
// fe.life() unit is SECOND!
long liveTime = fe.life() + fromLastSeen;
switch (fe.flowLiveType()) {
case IMMEDIATE_FLOW:
if (liveTime >= longPollInterval) {
fe.setFlowLiveType(FlowLiveType.LONG_FLOW);
longFlows.add(fe);
} else if (liveTime >= midPollInterval) {
fe.setFlowLiveType(FlowLiveType.MID_FLOW);
midFlows.add(fe);
} else if (liveTime >= calAndPollInterval) {
fe.setFlowLiveType(FlowLiveType.SHORT_FLOW);
shortFlows.add(fe);
}
break;
case SHORT_FLOW:
if (liveTime >= longPollInterval) {
fe.setFlowLiveType(FlowLiveType.LONG_FLOW);
shortFlows.remove(fe);
longFlows.add(fe);
} else if (liveTime >= midPollInterval) {
fe.setFlowLiveType(FlowLiveType.MID_FLOW);
shortFlows.remove(fe);
midFlows.add(fe);
}
break;
case MID_FLOW:
if (liveTime >= longPollInterval) {
fe.setFlowLiveType(FlowLiveType.LONG_FLOW);
midFlows.remove(fe);
longFlows.add(fe);
}
break;
case LONG_FLOW:
if (fromLastSeen > entirePollInterval) {
log.trace("checkAndMoveLiveFlowInternal, flow is already removed at switch.");
return false;
}
break;
case UNKNOWN_FLOW: // Unknown flow is an internal error flow type, just fall through
default:
// Error Unknown Live Type
log.error(
"checkAndMoveLiveFlowInternal, Unknown Live Type error!"
+ "AdaptiveStats collection thread for {}",
sw.getStringId());
return false;
}
log.debug(
"checkAndMoveLiveFlowInternal, FlowId="
+ Long.toHexString(fe.id().value())
+ ", state="
+ fe.state()
+ ", After liveType="
+ fe.flowLiveType()
+ ", liveTime="
+ liveTime
+ ", life="
+ fe.life()
+ ", bytes="
+ fe.bytes()
+ ", packets="
+ fe.packets()
+ ", fromLastSeen="
+ fromLastSeen
+ ", priority="
+ fe.priority()
+ ", selector="
+ fe.selector().criteria()
+ ", treatment="
+ fe.treatment()
+ " AdaptiveStats collection thread for {}",
sw.getStringId());
return true;
}
