94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
package notifications
|
|
|
|
import (
|
|
"net/http"
|
|
"time"
|
|
)
|
|
|
|
// EndpointConfig covers the optional configuration parameters for an active
|
|
// endpoint.
|
|
type EndpointConfig struct {
|
|
Headers http.Header
|
|
Timeout time.Duration
|
|
Threshold int
|
|
Backoff time.Duration
|
|
IgnoredMediaTypes []string
|
|
Transport *http.Transport
|
|
}
|
|
|
|
// defaults set any zero-valued fields to a reasonable default.
|
|
func (ec *EndpointConfig) defaults() {
|
|
if ec.Timeout <= 0 {
|
|
ec.Timeout = time.Second
|
|
}
|
|
|
|
if ec.Threshold <= 0 {
|
|
ec.Threshold = 10
|
|
}
|
|
|
|
if ec.Backoff <= 0 {
|
|
ec.Backoff = time.Second
|
|
}
|
|
|
|
if ec.Transport == nil {
|
|
ec.Transport = http.DefaultTransport.(*http.Transport)
|
|
}
|
|
}
|
|
|
|
// Endpoint is a reliable, queued, thread-safe sink that notify external http
|
|
// services when events are written. Writes are non-blocking and always
|
|
// succeed for callers but events may be queued internally.
|
|
type Endpoint struct {
|
|
Sink
|
|
url string
|
|
name string
|
|
|
|
EndpointConfig
|
|
|
|
metrics *safeMetrics
|
|
}
|
|
|
|
// NewEndpoint returns a running endpoint, ready to receive events.
|
|
func NewEndpoint(name, url string, config EndpointConfig) *Endpoint {
|
|
var endpoint Endpoint
|
|
endpoint.name = name
|
|
endpoint.url = url
|
|
endpoint.EndpointConfig = config
|
|
endpoint.defaults()
|
|
endpoint.metrics = newSafeMetrics()
|
|
|
|
// Configures the inmemory queue, retry, http pipeline.
|
|
endpoint.Sink = newHTTPSink(
|
|
endpoint.url, endpoint.Timeout, endpoint.Headers,
|
|
endpoint.Transport, endpoint.metrics.httpStatusListener())
|
|
endpoint.Sink = newRetryingSink(endpoint.Sink, endpoint.Threshold, endpoint.Backoff)
|
|
endpoint.Sink = newEventQueue(endpoint.Sink, endpoint.metrics.eventQueueListener())
|
|
endpoint.Sink = newIgnoredMediaTypesSink(endpoint.Sink, config.IgnoredMediaTypes)
|
|
|
|
register(&endpoint)
|
|
return &endpoint
|
|
}
|
|
|
|
// Name returns the name of the endpoint, generally used for debugging.
|
|
func (e *Endpoint) Name() string {
|
|
return e.name
|
|
}
|
|
|
|
// URL returns the url of the endpoint.
|
|
func (e *Endpoint) URL() string {
|
|
return e.url
|
|
}
|
|
|
|
// ReadMetrics populates em with metrics from the endpoint.
|
|
func (e *Endpoint) ReadMetrics(em *EndpointMetrics) {
|
|
e.metrics.Lock()
|
|
defer e.metrics.Unlock()
|
|
|
|
*em = e.metrics.EndpointMetrics
|
|
// Map still need to copied in a threadsafe manner.
|
|
em.Statuses = make(map[string]int)
|
|
for k, v := range e.metrics.Statuses {
|
|
em.Statuses[k] = v
|
|
}
|
|
}
|