internal FailurePercentageCircuitBreaker(GroupKey key, IClock clock, ICommandMetrics metrics, IStats stats, IMetricEvents metricEvents, FailurePercentageCircuitBreakerProperties properties, IConfigurableValue<long> gaugeIntervalMillisOverride = null)
{
_key = key;
_clock = clock;
_metrics = metrics;
if (stats == null)
{
throw new ArgumentNullException("stats");
}
if (metricEvents == null)
{
throw new ArgumentNullException("metricEvents");
}
_stats = stats;
_metricEvents = metricEvents;
Properties = properties;
_state = State.Fixed; // Start off assuming everything's fixed.
_lastTrippedTimestamp = 0; // 0 is fine since it'll be far less than the first compared value.
// Old gauge, will be phased out in v3.0 when IStats are removed.
_statsTimer = new GaugeTimer((source, args) =>
{
var snapshot = _metrics.GetSnapshot();
_stats.Gauge(StatsPrefix + " total", snapshot.Total >= properties.MinimumOperations.Value ? "Above" : "Below", snapshot.Total);
_stats.Gauge(StatsPrefix + " error", snapshot.ErrorPercentage >= properties.ThresholdPercentage.Value ? "Above" : "Below", snapshot.ErrorPercentage);
}, gaugeIntervalMillisOverride);
_metricsTimer = new GaugeTimer((source, args) =>
{
_metricEvents.BreakerConfigGauge(
Name,
Properties.MinimumOperations.Value,
Properties.ThresholdPercentage.Value,
Properties.TrippedDurationMillis.Value);
}, ConfigGaugeIntervalMillis);
}
internal FailurePercentageCircuitBreaker(GroupKey key, IClock clock, ICommandMetrics metrics, IStats stats, FailurePercentageCircuitBreakerProperties properties, IConfigurableValue <long> gaugeIntervalMillisOverride = null)
{
_key = key;
_clock = clock;
_metrics = metrics;
if (stats == null)
{
throw new ArgumentNullException("stats");
}
_stats = stats;
Properties = properties;
_state = State.Fixed; // Start off assuming everything's fixed.
_lastTrippedTimestamp = 0; // 0 is fine since it'll be far less than the first compared value.
_timer = new GaugeTimer((source, args) =>
{
var snapshot = _metrics.GetSnapshot();
_stats.Gauge(StatsPrefix + " total", snapshot.Total >= properties.MinimumOperations.Value ? "Above" : "Below", snapshot.Total);
_stats.Gauge(StatsPrefix + " error", snapshot.ErrorPercentage >= properties.ThresholdPercentage.Value ? "Above" : "Below", snapshot.ErrorPercentage);
}, gaugeIntervalMillisOverride);
}
internal FailurePercentageCircuitBreaker(GroupKey key, ICommandMetrics metrics, IStats stats, FailurePercentageCircuitBreakerProperties properties)
: this(key, new SystemClock(), metrics, stats, properties) {}
internal FailurePercentageCircuitBreaker(GroupKey key, ICommandMetrics metrics, IStats stats, FailurePercentageCircuitBreakerProperties properties)
: this(key, new SystemClock(), metrics, stats, properties)
{
}
internal static ICircuitBreaker GetCircuitBreaker(GroupKey key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
return Instance._circuitBreakers.GetOrAddSafe(key, k =>
{
var metrics = GetCommandMetrics(key);
var properties = new FailurePercentageCircuitBreakerProperties(
new ConfigurableValue<long>("mjolnir.breaker." + key + ".minimumOperations", DefaultBreakerMinimumOperations),
new ConfigurableValue<int>("mjolnir.breaker." + key + ".thresholdPercentage", DefaultBreakerThresholdPercentage),
new ConfigurableValue<long>("mjolnir.breaker." + key + ".trippedDurationMillis", DefaultBreakerTrippedDurationMillis),
new ConfigurableValue<bool>("mjolnir.breaker." + key + ".forceTripped", DefaultBreakerForceTripped),
new ConfigurableValue<bool>("mjolnir.breaker." + key + ".forceFixed", DefaultBreakerForceFixed));
return new FailurePercentageCircuitBreaker(key, metrics, Stats, properties);
});
}