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java.lang.Objectcom.netflix.loadbalancer.LoadBalancerStats
public class LoadBalancerStats
Class that acts as a repository of operational charateristics and statistics of every Node/Server in the LaodBalancer. This information can be used to just observe and understand the runtime behavior of the loadbalancer or more importantly for the basis that determines the loadbalacing strategy
Constructor Summary | |
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LoadBalancerStats(java.lang.String name)
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Method Summary | |
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void |
addServer(Server server)
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void |
clearSuccessiveConnectionFailureCount(Server server)
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void |
decrementActiveRequestsCount(Server server)
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int |
getActiveRequestsCount(java.lang.String zone)
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double |
getActiveRequestsPerServer(java.lang.String zone)
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java.util.Set<java.lang.String> |
getAvailableZones()
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int |
getCircuitBreakerTrippedCount()
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int |
getCircuitBreakerTrippedCount(java.lang.String zone)
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int |
getCongestionRatePercentage(java.lang.String zone)
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int |
getInstanceCount(java.lang.String zone)
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long |
getMeasuredZoneHits(java.lang.String zone)
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java.lang.String |
getName()
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java.util.Map<Server,ServerStats> |
getServerStats()
returns map of Stats for all servers |
ServerStats |
getSingleServerStat(Server server)
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ZoneSnapshot |
getZoneSnapshot(java.util.List<? extends Server> servers)
This is the core function to get zone stats. |
ZoneSnapshot |
getZoneSnapshot(java.lang.String zone)
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java.util.Map<java.lang.String,ZoneStats> |
getZoneStats()
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void |
incrementActiveRequestsCount(Server server)
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void |
incrementNumRequests(Server server)
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void |
incrementSuccessiveConnectionFailureCount(Server server)
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void |
incrementZoneCounter(Server server)
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boolean |
isCircuitBreakerTripped(Server server)
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void |
noteResponseTime(Server server,
double msecs)
Method that updates the internal stats of Response times maintained on a per Server basis |
void |
setName(java.lang.String name)
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java.lang.String |
toString()
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void |
updateServerList(java.util.List<Server> servers)
The caller o this class is tasked to call this method every so often if the servers participating in the LoadBalancer changes |
void |
updateZoneServerMapping(java.util.Map<java.lang.String,java.util.List<Server>> map)
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public LoadBalancerStats(java.lang.String name)
Method Detail |
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public java.lang.String getName()
public void setName(java.lang.String name)
public void updateServerList(java.util.List<Server> servers)
servers
- public void addServer(Server server)
public void noteResponseTime(Server server, double msecs)
server
- msecs
- public void incrementActiveRequestsCount(Server server)
public void decrementActiveRequestsCount(Server server)
public boolean isCircuitBreakerTripped(Server server)
public void incrementSuccessiveConnectionFailureCount(Server server)
public void clearSuccessiveConnectionFailureCount(Server server)
public void incrementNumRequests(Server server)
public void incrementZoneCounter(Server server)
public void updateZoneServerMapping(java.util.Map<java.lang.String,java.util.List<Server>> map)
public int getInstanceCount(java.lang.String zone)
public int getActiveRequestsCount(java.lang.String zone)
public double getActiveRequestsPerServer(java.lang.String zone)
public ZoneSnapshot getZoneSnapshot(java.lang.String zone)
public ZoneSnapshot getZoneSnapshot(java.util.List<? extends Server> servers)
servers
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public int getCircuitBreakerTrippedCount(java.lang.String zone)
@Monitor(name="LBStats_CircuitBreakerTrippedCount", type=GAUGE) public int getCircuitBreakerTrippedCount()
public long getMeasuredZoneHits(java.lang.String zone)
public int getCongestionRatePercentage(java.lang.String zone)
@Monitor(name="LBStats_AvailableZones", type=INFORMATIONAL) public java.util.Set<java.lang.String> getAvailableZones()
public ServerStats getSingleServerStat(Server server)
public java.util.Map<Server,ServerStats> getServerStats()
public java.util.Map<java.lang.String,ZoneStats> getZoneStats()
public java.lang.String toString()
toString
in class java.lang.Object
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