cfc65a13f6
This commit includes updates that affects the build, testing, and
deployment of Tile38.
- The root level build.sh has been broken up into multiple scripts
and placed in the "scripts" directory.
- The vendor directory has been updated to follow the Go modules
rules, thus `make` should work on isolated environments. Also
some vendored packages may have been updated to a later
version, if needed.
- The Makefile has been updated to allow for making single
binaries such as `make tile38-server`. There is some scaffolding
during the build process, so from now on all binaries should be
made using make. For example, to run a development version of
the tile38-cli binary, do this:
make tile38-cli && ./tile38-cli
not this:
go run cmd/tile38-cli/main.go
- Travis.CI docker push script has been updated to address a
change to Docker's JSON repo meta output, which in turn fixes
a bug where new Tile38 versions were not being properly pushed
to Docker
52 lines
2.1 KiB
Go
52 lines
2.1 KiB
Go
package sarama
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import (
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"fmt"
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"strings"
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"github.com/rcrowley/go-metrics"
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)
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// Use exponentially decaying reservoir for sampling histograms with the same defaults as the Java library:
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// 1028 elements, which offers a 99.9% confidence level with a 5% margin of error assuming a normal distribution,
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// and an alpha factor of 0.015, which heavily biases the reservoir to the past 5 minutes of measurements.
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// See https://github.com/dropwizard/metrics/blob/v3.1.0/metrics-core/src/main/java/com/codahale/metrics/ExponentiallyDecayingReservoir.java#L38
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const (
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metricsReservoirSize = 1028
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metricsAlphaFactor = 0.015
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)
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func getOrRegisterHistogram(name string, r metrics.Registry) metrics.Histogram {
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return r.GetOrRegister(name, func() metrics.Histogram {
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return metrics.NewHistogram(metrics.NewExpDecaySample(metricsReservoirSize, metricsAlphaFactor))
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}).(metrics.Histogram)
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}
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func getMetricNameForBroker(name string, broker *Broker) string {
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// Use broker id like the Java client as it does not contain '.' or ':' characters that
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// can be interpreted as special character by monitoring tool (e.g. Graphite)
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return fmt.Sprintf(name+"-for-broker-%d", broker.ID())
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}
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func getOrRegisterBrokerMeter(name string, broker *Broker, r metrics.Registry) metrics.Meter {
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return metrics.GetOrRegisterMeter(getMetricNameForBroker(name, broker), r)
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}
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func getOrRegisterBrokerHistogram(name string, broker *Broker, r metrics.Registry) metrics.Histogram {
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return getOrRegisterHistogram(getMetricNameForBroker(name, broker), r)
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}
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func getMetricNameForTopic(name string, topic string) string {
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// Convert dot to _ since reporters like Graphite typically use dot to represent hierarchy
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// cf. KAFKA-1902 and KAFKA-2337
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return fmt.Sprintf(name+"-for-topic-%s", strings.Replace(topic, ".", "_", -1))
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}
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func getOrRegisterTopicMeter(name string, topic string, r metrics.Registry) metrics.Meter {
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return metrics.GetOrRegisterMeter(getMetricNameForTopic(name, topic), r)
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}
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func getOrRegisterTopicHistogram(name string, topic string, r metrics.Registry) metrics.Histogram {
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return getOrRegisterHistogram(getMetricNameForTopic(name, topic), r)
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}
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