NewCounterTracker creates and returns a counter tracker.

NewHTTPSink returns a Sink that can receive sonde HttpStartStop events and generate per-application HTTP metrics from them.

NewLogSink returns a Sink that can receive sonde Events, translate them and send them to a stackdriver.LogAdapter.

NewLogSink returns a Sink that can receive sonde Events, translate them and send them to a stackdriver.MetricAdapter.

MatchJob matches the supplied regexp against the Envelope job.

MatchName matches the supplied regexp against the Envelope origin and the metric name concatenated with ".", e.g.

CounterTracker is used to provide a "start time" for each loggregator counter metric exported by the nozzle.

An EventFilter can be used to specify regular expressions to match against event proto fields, for the purpose of blacklisting or whitelisting nozzle processing of firehose events.