// NewListener creates a new listener for carbon datapoints
func NewListener(ctx context.Context, sink dpsink.Sink, conf listenerConfig, listenAddr string,
metricDeconstructor string, metricDeconstructorOptions string) (*Listener, error) {
psocket, err := net.Listen("tcp", listenAddr)
if err != nil {
return nil, err
}
deconstructor, err := metricdeconstructor.Load(metricDeconstructor, metricDeconstructorOptions)
if err != nil {
return nil, err
}
counter := &dpsink.Counter{}
finalSink := dpsink.FromChain(sink, dpsink.NextWrap(counter))
receiver := Listener{
sink: finalSink,
psocket: psocket,
conf: conf,
metricDeconstructor: deconstructor,
ctx: ctx,
st: stats.ToKeeperMany(protocol.ListenerDims(conf.name, "carbon"), counter),
}
receiver.wg.Add(1)
go receiver.startListening()
return &receiver, nil
}
func TestNewCarbonDatapoint(t *testing.T) {
identityParser, _ := metricdeconstructor.Load("", "")
dp, err := NewCarbonDatapoint("hello 3 3", identityParser)
assert.Equal(t, nil, err, "Should be a valid carbon line")
assert.Equal(t, "hello", dp.Metric, "Should get metric back")
_, err = NewCarbonDatapoint("INVALIDLINE", identityParser)
assert.NotEqual(t, nil, err, "Line should be invalid")
_, err = NewCarbonDatapoint("hello 3 bob", identityParser)
assert.NotEqual(t, nil, err, "Line should be invalid")
_, err = NewCarbonDatapoint("hello bob 3", identityParser)
assert.NotEqual(t, nil, err, "Line should be invalid")
dp, _ = NewCarbonDatapoint("hello 3.3 3", identityParser)
f := dp.Value.(datapoint.FloatValue).Float()
assert.Equal(t, 3.3, f, "Should get value back")
carbonDp, _ := NativeCarbonLine(dp)
assert.Equal(t, "hello 3.3 3", carbonDp, "Should get the carbon line back")
dp, err = NewCarbonDatapoint("hello 3 3", &errorDeconstructor{})
assert.NotEqual(t, nil, err, "Should NOT be a valid carbon line")
}