HandlerServlet creates a Servlet from a Handler, which implements ServeHTTP.

LogIfError makes it less verbose to defer a Close() call while handling an unlikely-but-possible error return by logging it. Example: defer LogIfErr

NewForwardingBackend creates a new Backend that sends all metrics to a ForwardHandler

PrefixServlet registers a whole Servlet under a path prefix.

RunAndWait starts all components in this `Main`. `RunAndWait` will also listen to SIGINT and SIGTERM to do graceful shutdowns of all components it ma

Running returns a (racy) counter of how many Run calls are currently executing their function.

WatchingTaggable attaches a Taggable to a Context. When a metric is recorded, StatsTags() will be called and the tags will be appended.

CombineServlets combines all Servlets into one, without other modifications. Great for splitting the dependency managements into smaller servlets.

ContextWait waits for a signal while the context is not Done. Requires L to be locked. Returns whether it received the signal.

Distribution tracks the statistical distribution of a set of values across your infrastructure.

New creates a new `Main`

NewRequestMetricsMiddleware records the time taken to serve a request, and logs request and response data. Example tags: statusClass:2xx, statusCode:2

Recover recovers a panic, if any, and submits it to bugsnag through logrus (assuming that handler is registered) before terminating the program for re

Release unlocks a key and resolved the previous Promise, if any.

TimeoutWait waits for a signal for up to a duration. Requires L to be locked. Returns whether it received the signal.

WatchingLoggable attaches a Loggable to the Context. Upon logging, LogFields will be called and the fields will be attached as metadata.

Fill buf through n writes of string fus. The initial contents of buf corresponds to the string s; the result is the final contents of buf returned as

getStatsTagsMap returns the merged tags as a map

AutoRecover when deferred, records a panic to Bugsnag and recovers.

Count tracks how many times something happened per second.

EnvVarHeaderMiddleware will expose environment variables as HTTP response headers. It can be used with github.com/gorilla/mux:Router.Use or wrapping a

Gauge measures the value of a metric at a particular time.

Histogram tracks the statistical distribution of a set of values on each host.

NewBugsnagHook initializes a logrus hook which sends exceptions to an exception-tracking service compatible with the Bugsnag API. Before using this ho

NewDatadogBackend instantiates a new datadog/statsd connection. When running in containers at shopify, the endpoint should generally be "localhost:812

NewDummy returns a rand.Rand seeded with 0.

NewLimiterWithSampledGauge creates a Limiter that will publish the a gauge every <sampling> Run

NewLocked returns a rand.Rand with a random source protected by a mutex. To be used for concurrent access.

NewLockedSource wraps the Source with a mutex. To be used for concurrent access.

NewLogBackend creates a new Backend that emits statsd metrics to the logger. namespace is a global namespace to apply to every metric emitted. tags i

NewSource returns a rand.Source seeded with the current time with nanoseconds precision.

SecurityHeaderMiddleware set default security headers.

Timing sends timing information, it is an alias for TimeInMilliseconds

TombWait waits for a signal while the tomb is not dead. Requires L to be locked. Returns whether it received the signal.

WithLoggable attaches a Loggable's fields to the Context. Upon logging, those fields will be attached as metadata.

WithTag attaches a key-value pair to a Context. Upon recording a metric, the pair will be attached as a tag.