Package org.apache.solr.util.circuitbreaker

Class LoadAverageCircuitBreaker

java.lang.Object

org.apache.solr.util.circuitbreaker.CircuitBreaker

org.apache.solr.util.circuitbreaker.LoadAverageCircuitBreaker

All Implemented Interfaces:

Closeable, AutoCloseable, NamedListInitializedPlugin

public class LoadAverageCircuitBreaker
extends CircuitBreaker

Tracks current system load average and triggers if the specified threshold is breached.

This circuit breaker gets the load average (length of the run queue) over the last minute and uses that data to take a decision. We depend on OperatingSystemMXBean which does not allow a configurable interval of collection of data.

Constructor Summary

Constructors

Constructor	Description
LoadAverageCircuitBreaker()

Method Summary

Modifier and Type	Method	Description
protected double	calculateLiveLoadAverage()
String	getErrorMessage()	Get error message when the circuit breaker triggers
double	getLoadAverageThreshold()
boolean	isTripped()	Check if circuit breaker is tripped.
void	setThreshold(double thresholdValueUnbounded)

Methods inherited from class org.apache.solr.util.circuitbreaker.CircuitBreaker

close, getErrorCode, getRequestTypes, init, setRequestTypes

Methods inherited from class java.lang.Object

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

Constructor Detail

LoadAverageCircuitBreaker

public LoadAverageCircuitBreaker()

Method Detail

isTripped

public boolean isTripped()

Description copied from class: CircuitBreaker

Check if circuit breaker is tripped.

Specified by:

isTripped in class CircuitBreaker

getErrorMessage

public String getErrorMessage()

Description copied from class: CircuitBreaker

Get error message when the circuit breaker triggers

Specified by:

getErrorMessage in class CircuitBreaker

setThreshold

public void setThreshold(double thresholdValueUnbounded)

getLoadAverageThreshold

public double getLoadAverageThreshold()

calculateLiveLoadAverage

protected double calculateLiveLoadAverage()