This is a reporter for the go-metrics library which posts the metrics to AppOptics. It is based on ysamlan's AppOptics reporter, which was based on mihaysa's Librato reporter.

Usage

import "github.com/appoptics/go-metrics-appoptics"

go appoptics.AppOptics(metrics.DefaultRegistry,
    10*time.Second,              // interval for uploads
    "token",                     // AppOptics API token
    map[string]string{
        "hostname": "localhost", // tags
    }, 
    []float64{0.95},             // percentiles to send
    time.Millisecond,            // time units for timers
    "myservicename.",            // prefix on reported metric names
    nil,                         // (optional) go-metrics runtime.* stats upload whitelist
)

Features

Metric Name Prefix: This reporter supports a prefix argument when initializing. All uploaded metrics will have that prefix prepended to their names. Use "" if you don't want this behavior.

Tags: Tags passed during the initialization are attached to all this reporter's measurements to AppOptics.

Tags can also be created on a per-metric level using the .Tag() function, for example:

appoptics.Metric("myMetric").Tag("tagA", "foo").Tag("tagB", "bar").Meter().Mark()

Or, to create a histogram with a custom sample type:

appoptics.Metric("myMetric").Tag("tag", "foo").WithSample(func() metrics.Sample { return metrics.NewUniformSample(1000) }).Histogram().Update(100)

Selective runtime metric uploading: If you're using go-metrics' CaptureRuntimeMemStats feature, it's great and automates collecting a lot of useful data. Unfortunately, it also adds 30 metrics, which can eat up a lot of metric hours with AppOptics. The runtimeMetricsWhiteleist parameter lets you cherry-pick which metrics actually get uploaded, without needing to manually collect them yourself. See the source for possible values. Pass nil to allow all, and an empty slice to disable uploads for all runtime. metrics.

Migrating from Librato and the rcrowley/go-metrics / mihasya/go-metrics-librato implementation

Source-based metrics are not supported in AppOptics. To migrate from the old Librato reporter (only with tags instead of sources):

• Change the import to "github.com/appoptics/go-metrics-appoptics"
• Change librato.Librato to appoptics.AppOptics
• Remove the email argument from the appoptics.AppOptics function call (the updated AppOptics API only requires the token)
• Change the source argument from a string into a map[string]string for tags - e.g. a source "myhostname" could become the tag map[string]string{"host":"myhostname"}).
• Use "" for the metric name prefix.
• Use nil for the runtime-metric-name whitelist (allow-all).