49 lines
1 KiB
Go
49 lines
1 KiB
Go
package core
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import (
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"sync/atomic"
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"time"
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)
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// Health is a health checker that needs regular updates to stay healthy
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type Health struct {
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locker uint32 // mutex
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updated time.Time
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timeout time.Duration
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}
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// NewHealth creates new health checker
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func NewHealth(timeout time.Duration) (health *Health) {
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return &Health{timeout: timeout}
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}
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// Healthy returns health status based on last update timestamp
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func (health *Health) Healthy() bool {
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start := time.Now()
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for time.Since(start) < time.Second {
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if atomic.CompareAndSwapUint32(&health.locker, 0, 1) {
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defer atomic.StoreUint32(&health.locker, 0)
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return time.Since(health.updated) < health.timeout
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}
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time.Sleep(50 * time.Millisecond)
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}
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return false
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}
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// Update updates the health timer on each loadpoint update
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func (health *Health) Update() {
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start := time.Now()
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for time.Since(start) < time.Second {
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if atomic.CompareAndSwapUint32(&health.locker, 0, 1) {
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health.updated = time.Now()
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atomic.StoreUint32(&health.locker, 0)
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return
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}
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time.Sleep(50 * time.Millisecond)
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}
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}
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