package org.infinispan.stats.impl;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import org.infinispan.commons.CacheException;
import org.infinispan.factories.annotations.Inject;
import org.infinispan.factories.annotations.Start;
import org.infinispan.jmx.JmxStatisticsExposer;
import org.infinispan.jmx.annotations.DataType;
import org.infinispan.jmx.annotations.DisplayType;
import org.infinispan.jmx.annotations.ManagedAttribute;
import org.infinispan.jmx.annotations.ManagedOperation;
import org.infinispan.jmx.annotations.Units;
import org.infinispan.util.TimeService;
import org.infinispan.util.logging.Log;
/**
* @author Ryan Emerson
* @since 9.0
*/
public abstract class AbstractClusterStats implements JmxStatisticsExposer {
public static final long DEFAULT_STALE_STATS_THRESHOLD = 3000;
private TimeService timeService;
private volatile long staleStatsThreshold = DEFAULT_STALE_STATS_THRESHOLD;
private volatile long statsUpdateTimestamp = 0;
volatile boolean statisticsEnabled = false;
private final Log log;
private final AtomicLong resetNanoseconds = new AtomicLong(0);
final HashMap<String, Number> statsMap = new HashMap<>();
AbstractClusterStats(Log log) {
this.log = log;
}
abstract void updateStats() throws Exception;
@Inject
void init(TimeService timeService) {
this.timeService = timeService;
}
@Start
void start() {
setStatisticsEnabled(statisticsEnabled);
}
public void reset() {
statsMap.clear();
}
@ManagedAttribute(description = "Gets the threshold for cluster wide stats refresh (milliseconds)",
displayName = "Stale Stats Threshold",
dataType = DataType.TRAIT,
writable = true)
public long getStaleStatsThreshold() {
return staleStatsThreshold;
}
public void setStaleStatsThreshold(long staleStatsThreshold) {
this.staleStatsThreshold = staleStatsThreshold;
}
@Override
@ManagedOperation(description = "Resets statistics gathered by this component", displayName = "Reset statistics")
public void resetStatistics() {
if (isStatisticsEnabled()) {
reset();
resetNanoseconds.set(timeService.time());
}
}
@ManagedAttribute(
description = "Number of seconds since the cluster-wide statistics were last reset",
displayName = "Seconds since cluster-wide statistics were reset",
units = Units.SECONDS,
displayType = DisplayType.SUMMARY
)
public long getTimeSinceReset() {
long result = -1;
if (isStatisticsEnabled()) {
result = timeService.timeDuration(resetNanoseconds.get(), TimeUnit.SECONDS);
}
return result;
}
@Override
public void setStatisticsEnabled(boolean enabled) {
this.statisticsEnabled = enabled;
if (enabled) {
//yes technically we do not reset stats but we initialize them
resetNanoseconds.set(timeService.time());
}
}
@Override
public boolean getStatisticsEnabled() {
return statisticsEnabled;
}
@ManagedAttribute(description = "Enables or disables the gathering of statistics by this component",
displayName = "Statistics enabled",
dataType = DataType.TRAIT,
writable = true)
public boolean isStatisticsEnabled() {
return getStatisticsEnabled();
}
synchronized void fetchClusterWideStatsIfNeeded() {
long duration = timeService.timeDuration(statsUpdateTimestamp, timeService.time(), TimeUnit.MILLISECONDS);
if (duration > DEFAULT_STALE_STATS_THRESHOLD) {
try {
updateStats();
} catch (Exception e) {
log.error("Could not execute cluster wide cache stats operation ", e);
throw new CacheException("Could not execute cluster wide cache stats operation", e);
} finally {
statsUpdateTimestamp = timeService.time();
}
}
}
long addLongAttributes(List<Map<String, Number>> responseList, String attribute) {
long total = 0;
for (Map<String, Number> m : responseList) {
Number value = m.get(attribute);
long longValue = value.longValue();
if (longValue > -1) {
total += longValue;
}
}
return total;
}
double addDoubleAttributes(List<Map<String, Number>> responseList, String attribute) {
double total = 0;
for (Map<String, Number> m : responseList) {
Number value = m.get(attribute);
double doubleValue = value.doubleValue();
if (doubleValue > -1) {
total += doubleValue;
}
}
return total;
}
int addIntAttributes(List<Map<String, Number>> responseList, String attribute) {
int total = 0;
for (Map<String, Number> m : responseList) {
Number value = m.get(attribute);
long intValue = value.intValue();
if (intValue > -1) {
total += intValue;
}
}
return total;
}
void putLongAttributesAverage(List<Map<String, Number>> responseList, String attribute) {
long average = addLongAttributes(responseList, attribute) / responseList.size();
statsMap.put(attribute, average);
}
void putLongAttributes(List<Map<String, Number>> responseList, String attribute) {
statsMap.put(attribute, addLongAttributes(responseList, attribute));
}
void putIntAttributes(List<Map<String, Number>> responseList, String attribute) {
statsMap.put(attribute, addIntAttributes(responseList, attribute));
}
long getStatAsLong(String attribute) {
return getStat(attribute).longValue();
}
int getStatAsInt(String attribute) {
return getStat(attribute).intValue();
}
private Number getStat(String attribute) {
if (isStatisticsEnabled()) {
fetchClusterWideStatsIfNeeded();
return statsMap.getOrDefault(attribute, 0);
} else {
return -1;
}
}
}