Documentation
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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type CloudWatch ¶
type CloudWatch struct {
// contains filtered or unexported fields
}
CloudWatch receives metrics observations and forwards them to CloudWatch. Create a CloudWatch object, use it to create metrics, and pass those metrics as dependencies to the components that will use them.
To regularly report metrics to CloudWatch, use the WriteLoop helper method.
func New ¶
func New(namespace string, svc cloudwatchiface.CloudWatchAPI, options ...Option) *CloudWatch
New returns a CloudWatch object that may be used to create metrics. Namespace is applied to all created metrics and maps to the CloudWatch namespace. Callers must ensure that regular calls to Send are performed, either manually or with one of the helper methods.
func (*CloudWatch) NewCounter ¶
func (cw *CloudWatch) NewCounter(name string) metrics.Counter
NewCounter returns a counter. Observations are aggregated and emitted once per write invocation.
func (*CloudWatch) NewGauge ¶
func (cw *CloudWatch) NewGauge(name string) metrics.Gauge
NewGauge returns an gauge.
func (*CloudWatch) NewHistogram ¶
func (cw *CloudWatch) NewHistogram(name string) metrics.Histogram
NewHistogram returns a histogram.
func (*CloudWatch) Send ¶
func (cw *CloudWatch) Send() error
Send will fire an API request to CloudWatch with the latest stats for all metrics. It is preferred that the WriteLoop method is used.
func (*CloudWatch) WriteLoop ¶
func (cw *CloudWatch) WriteLoop(ctx context.Context, c <-chan time.Time)
WriteLoop is a helper method that invokes Send every time the passed channel fires. This method blocks until ctx is canceled, so clients probably want to run it in its own goroutine. For typical usage, create a time.Ticker and pass its C channel to this method.
type Counter ¶
type Counter struct {
// contains filtered or unexported fields
}
Counter is a counter. Observations are forwarded to a node object, and aggregated (summed) per timeseries.
type Gauge ¶
type Gauge struct {
// contains filtered or unexported fields
}
Gauge is a gauge. Observations are forwarded to a node object, and aggregated (the last observation selected) per timeseries.
type Histogram ¶
type Histogram struct {
// contains filtered or unexported fields
}
Histogram is an Influx histrogram. Observations are aggregated into a generic.Histogram and emitted as per-quantile gauges to the Influx server.
type Option ¶
type Option func(*CloudWatch)
Option is a function adapter to change config of the CloudWatch struct
func WithConcurrentRequests ¶
WithConcurrentRequests sets the upper limit on how many cloudwatch.PutMetricDataRequest may be under way at any given time. If n is greater than 20, 20 is used. By default, the max is set at 10 concurrent requests.
func WithLogger ¶
WithLogger sets the Logger that will receive error messages generated during the WriteLoop. By default, fmt logger is used.
func WithPercentiles ¶
WithPercentiles registers the percentiles to track, overriding the existing/default values. Reason is that Cloudwatch makes you pay per metric, so you can save half the money by only using 2 metrics instead of the default 4.
Source Files