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reporter.go
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reporter.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package tally
import "time"
// BaseStatsReporter implements the shared reporter methods.
type BaseStatsReporter interface {
// Capabilities returns the capabilities description of the reporter.
Capabilities() Capabilities
// Flush asks the reporter to flush all reported values.
Flush()
}
// StatsReporter is a backend for Scopes to report metrics to.
type StatsReporter interface {
BaseStatsReporter
// ReportCounter reports a counter value
ReportCounter(
name string,
tags map[string]string,
value int64,
)
// ReportGauge reports a gauge value
ReportGauge(
name string,
tags map[string]string,
value float64,
)
// ReportTimer reports a timer value
ReportTimer(
name string,
tags map[string]string,
interval time.Duration,
)
// ReportHistogramValueSamples reports histogram samples for a bucket
ReportHistogramValueSamples(
name string,
tags map[string]string,
buckets Buckets,
bucketLowerBound,
bucketUpperBound float64,
samples int64,
)
// ReportHistogramDurationSamples reports histogram samples for a bucket
ReportHistogramDurationSamples(
name string,
tags map[string]string,
buckets Buckets,
bucketLowerBound,
bucketUpperBound time.Duration,
samples int64,
)
}
// CachedStatsReporter is a backend for Scopes that pre allocates all
// counter, gauges, timers & histograms. This is harder to implement but more performant.
type CachedStatsReporter interface {
BaseStatsReporter
// AllocateCounter pre allocates a counter data structure with name & tags.
AllocateCounter(
name string,
tags map[string]string,
) CachedCount
// AllocateGauge pre allocates a gauge data structure with name & tags.
AllocateGauge(
name string,
tags map[string]string,
) CachedGauge
// AllocateTimer pre allocates a timer data structure with name & tags.
AllocateTimer(
name string,
tags map[string]string,
) CachedTimer
// AllocateHistogram pre allocates a histogram data structure with name, tags,
// value buckets and duration buckets.
AllocateHistogram(
name string,
tags map[string]string,
buckets Buckets,
) CachedHistogram
}
// CachedCount interface for reporting an individual counter
type CachedCount interface {
ReportCount(value int64)
}
// CachedGauge interface for reporting an individual gauge
type CachedGauge interface {
ReportGauge(value float64)
}
// CachedTimer interface for reporting an individual timer
type CachedTimer interface {
ReportTimer(interval time.Duration)
}
// CachedHistogram interface for reporting histogram samples to buckets
type CachedHistogram interface {
ValueBucket(
bucketLowerBound, bucketUpperBound float64,
) CachedHistogramBucket
DurationBucket(
bucketLowerBound, bucketUpperBound time.Duration,
) CachedHistogramBucket
}
// CachedHistogramBucket interface for reporting histogram samples to a specific bucket
type CachedHistogramBucket interface {
ReportSamples(value int64)
}