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20429bb9dc
* Remove MDS and replace it with Controller This commit removes the MDS layer (and package) and shifts Controller package into its place. * add pprof/fgprof to serverless http router --------- Co-authored-by: Matthew Jaffee <jaffee@pilosa.com>
59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
package poller
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import (
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"fmt"
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"net/http"
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"time"
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"github.com/featurebasedb/featurebase/v3/dax"
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"github.com/featurebasedb/featurebase/v3/logger"
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)
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// NodePoller is an interface to anything which has the ability to poll a
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// node.
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type NodePoller interface {
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Poll(dax.Address) bool
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}
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// Ensure type implements interface.
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var _ NodePoller = (*NopNodePoller)(nil)
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var _ NodePoller = (*HTTPNodePoller)(nil)
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// NopNodePoller is a no-op implementation of the NodePoller interface.
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type NopNodePoller struct{}
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func NewNopNodePoller() *NopNodePoller {
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return &NopNodePoller{}
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}
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func (p *NopNodePoller) Poll(addr dax.Address) bool {
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return true
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}
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// HTTPNodePoller is an http implementation of the NodePoller interface.
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type HTTPNodePoller struct {
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logger logger.Logger
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client *http.Client
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}
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func NewHTTPNodePoller(logger logger.Logger) *HTTPNodePoller {
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return &HTTPNodePoller{
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logger: logger,
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client: &http.Client{
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Timeout: time.Second, // short timeout for polling to detect issues quickly. /health endpoints should always respond fast.
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},
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}
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}
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func (p *HTTPNodePoller) Poll(addr dax.Address) bool {
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url := fmt.Sprintf("%s/health", addr.WithScheme("http"))
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if resp, err := p.client.Get(url); err != nil {
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p.logger.Printf("poll error: %s\n", err)
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return false
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} else if resp.StatusCode != http.StatusOK {
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return false
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}
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return true
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}
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