Initial open source commit

Author: danielgtaylor

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Vendored directories installed by dependency management tool
+vendor
+
+coverage.txt

.travis.yml

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+language: go
+go:
+  - 1.7
+  - 1.8
+install:
+  - go get -u github.com/golang/dep/cmd/dep
+  - dep ensure
+script:
+  - go test -coverprofile=coverage.txt -covermode=atomic -v $(go list ./... | grep -v "/vendor/")
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

CHANGELOG.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+- Make project public on GitHub.

Gopkg.lock

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+
+# Gopkg.toml
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+
+
+[[constraint]]
+  name = "github.com/DataDog/datadog-go"
+  version = "1.1.0"

Gopkg.toml

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+Apache License
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+http://www.apache.org/licenses/
+
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+APPENDIX: How to apply the Apache License to your work.
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+Copyright 2017 iStreamPlanet Co., LLC
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+limitations under the License.

LICENSE

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+# Metrics Library for Go
+
+A library that provides an interface for sending metrics from your script, application, or service. Metrics consist of a name, value, and optionally some tags that are made up of key/value pairs.
+
+Multiple implementations are provided to allow for production, local development, and testing use cases. The following clients are available:
+
+Client           | Description
+---------------- | -----------
+`LoggerClient`   | Writes metrics into a log stream. Useful when running locally.
+`DataDogClient`  | Writes metrics into DataDog. Useful for production.
+`NullClient`     | Acts like a mock that does nothing. Useful for testing.
+`RecorderClient` | Writes metrics into memory and provides a query interface. Useful for testing.
+
+## Example Usage
+
+Generally you will instantiate one of the above clients and then write metrics to it:
+
+```go
+import "github.com/istreamlabs/go-metrics"
+
+client := metrics.NewDataDogClient("127.0.0.1:8125", "myprefix")
+
+// Simple incrementing counter
+client.Incr("requests.count")
+
+// Tagging with counters
+client.WithTags(map[string]string{
+  "tag": "value"
+}).Incr("requests.count")
+```
+
+The above code would result in `myprefix.requests.count` with a value of `1` showing up in DataDog. See the [`Client`](https://godoc.org/github.com/istreamlabs/go-metrics/#Client) interface for a list of available metrics methods.
+
+Also provided are useful clients for testing. For example, the following asserts that a metric with the given name, value, and tag was emitted during a test:
+
+```go
+func TestFoo(t *testing.T)
+  client := metrics.NewRecorderClient().WithTest(t)
+
+  client.WithTags(map[string]string{
+    "tag": "value",
+  }).Count("requests.count", 1)
+
+  // Now, assert that the metric was emitted.
+  client.
+    Expect("requests.count").
+    Value(1).
+    Tag("tag", "value")
+}
+```
+
+For more information and examples, see the [godocs](https://godoc.org/github.com/istreamlabs/go-metrics/).
+
+## License
+
+Copyright © 2017 iStreamPlanet Co., LLC
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.

README.md

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+// Package metrics provides a generic interface for sending metrics from your
+// script, application, or service. Metrics consist of a name, a numeric value,
+// and optionally a number of tags that are made up of key/value pairs.
+//
+// Multiple implementations are provided to allow for production, local
+// development, and testing use cases. Generally you will instantiate one
+// of these clients and then write metrics to it:
+//
+//   client := metrics.NewDataDogClient("127.0.0.1:8125", "myprefix")
+//
+//   // Simple incrementing counter
+//   client.Incr("requests.count")
+//
+//   // Tagging with counters
+//   client.WithTags(map[string]string{
+//     "tag": "value"
+//   }).Incr("requests.count")
+//
+// Also provided are useful clients for testing, both for when you want
+// to assert that certain metrics are emitted and a `NullClient` for when
+// you want to ignore them.
+//
+//   func TestFoo(t *testing.T) {
+//     client := metrics.NewRecorderClient().WithTest(t)
+//
+//     client.WithTags(map[string]string{
+//       "tag": "value",
+//     }).Count("requests.count", 1)
+//
+//     // Now, assert that the metric was emitted.
+//     client.
+//       Expect("requests.count").
+//       Value(1).
+//       Tag("tag", "value")
+//   }
+//
+package metrics
+
+import (
+	"time"
+
+	"github.com/DataDog/datadog-go/statsd"
+)
+
+// Client provides a generic interface to log metrics and events
+type Client interface {
+	// WithTags returns a new client with the given tags.
+	WithTags(tags map[string]string) Client
+
+	// Count/Incr/Decr set a numeric integer value.
+	Count(name string, value int64)
+	Incr(name string)
+	Decr(name string)
+
+	// Gauge sets a numeric floating point value.
+	Gauge(name string, value float64)
+
+	// Event creates a new event, which allows additional information to be
+	// included when something worth calling out happens.
+	Event(e *statsd.Event)
+
+	// Timing creates a histogram of a duration.
+	Timing(name string, value time.Duration)
+
+	// Historgram creates a numeric floating point metric with min/max/avg/p95/etc
+	Histogram(name string, value float64)
+}