[VOL-2538] Logging - Implement dynamic log levels in ofagent
Change-Id: I9582230d9d3c34ea84339fddf2b2f3b3d2804808
diff --git a/vendor/github.com/armon/go-metrics/sink.go b/vendor/github.com/armon/go-metrics/sink.go
new file mode 100644
index 0000000..0b7d6e4
--- /dev/null
+++ b/vendor/github.com/armon/go-metrics/sink.go
@@ -0,0 +1,115 @@
+package metrics
+
+import (
+ "fmt"
+ "net/url"
+)
+
+// The MetricSink interface is used to transmit metrics information
+// to an external system
+type MetricSink interface {
+ // A Gauge should retain the last value it is set to
+ SetGauge(key []string, val float32)
+ SetGaugeWithLabels(key []string, val float32, labels []Label)
+
+ // Should emit a Key/Value pair for each call
+ EmitKey(key []string, val float32)
+
+ // Counters should accumulate values
+ IncrCounter(key []string, val float32)
+ IncrCounterWithLabels(key []string, val float32, labels []Label)
+
+ // Samples are for timing information, where quantiles are used
+ AddSample(key []string, val float32)
+ AddSampleWithLabels(key []string, val float32, labels []Label)
+}
+
+// BlackholeSink is used to just blackhole messages
+type BlackholeSink struct{}
+
+func (*BlackholeSink) SetGauge(key []string, val float32) {}
+func (*BlackholeSink) SetGaugeWithLabels(key []string, val float32, labels []Label) {}
+func (*BlackholeSink) EmitKey(key []string, val float32) {}
+func (*BlackholeSink) IncrCounter(key []string, val float32) {}
+func (*BlackholeSink) IncrCounterWithLabels(key []string, val float32, labels []Label) {}
+func (*BlackholeSink) AddSample(key []string, val float32) {}
+func (*BlackholeSink) AddSampleWithLabels(key []string, val float32, labels []Label) {}
+
+// FanoutSink is used to sink to fanout values to multiple sinks
+type FanoutSink []MetricSink
+
+func (fh FanoutSink) SetGauge(key []string, val float32) {
+ fh.SetGaugeWithLabels(key, val, nil)
+}
+
+func (fh FanoutSink) SetGaugeWithLabels(key []string, val float32, labels []Label) {
+ for _, s := range fh {
+ s.SetGaugeWithLabels(key, val, labels)
+ }
+}
+
+func (fh FanoutSink) EmitKey(key []string, val float32) {
+ for _, s := range fh {
+ s.EmitKey(key, val)
+ }
+}
+
+func (fh FanoutSink) IncrCounter(key []string, val float32) {
+ fh.IncrCounterWithLabels(key, val, nil)
+}
+
+func (fh FanoutSink) IncrCounterWithLabels(key []string, val float32, labels []Label) {
+ for _, s := range fh {
+ s.IncrCounterWithLabels(key, val, labels)
+ }
+}
+
+func (fh FanoutSink) AddSample(key []string, val float32) {
+ fh.AddSampleWithLabels(key, val, nil)
+}
+
+func (fh FanoutSink) AddSampleWithLabels(key []string, val float32, labels []Label) {
+ for _, s := range fh {
+ s.AddSampleWithLabels(key, val, labels)
+ }
+}
+
+// sinkURLFactoryFunc is an generic interface around the *SinkFromURL() function provided
+// by each sink type
+type sinkURLFactoryFunc func(*url.URL) (MetricSink, error)
+
+// sinkRegistry supports the generic NewMetricSink function by mapping URL
+// schemes to metric sink factory functions
+var sinkRegistry = map[string]sinkURLFactoryFunc{
+ "statsd": NewStatsdSinkFromURL,
+ "statsite": NewStatsiteSinkFromURL,
+ "inmem": NewInmemSinkFromURL,
+}
+
+// NewMetricSinkFromURL allows a generic URL input to configure any of the
+// supported sinks. The scheme of the URL identifies the type of the sink, the
+// and query parameters are used to set options.
+//
+// "statsd://" - Initializes a StatsdSink. The host and port are passed through
+// as the "addr" of the sink
+//
+// "statsite://" - Initializes a StatsiteSink. The host and port become the
+// "addr" of the sink
+//
+// "inmem://" - Initializes an InmemSink. The host and port are ignored. The
+// "interval" and "duration" query parameters must be specified with valid
+// durations, see NewInmemSink for details.
+func NewMetricSinkFromURL(urlStr string) (MetricSink, error) {
+ u, err := url.Parse(urlStr)
+ if err != nil {
+ return nil, err
+ }
+
+ sinkURLFactoryFunc := sinkRegistry[u.Scheme]
+ if sinkURLFactoryFunc == nil {
+ return nil, fmt.Errorf(
+ "cannot create metric sink, unrecognized sink name: %q", u.Scheme)
+ }
+
+ return sinkURLFactoryFunc(u)
+}