c2780f42c4
Exporting Zone.File to avoid getters and setters Updating getter and setter for Zone.File to be less racy Renaming GetFile to File in zone plugin
68 lines
1.4 KiB
Go
68 lines
1.4 KiB
Go
package file
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import (
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"os"
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"time"
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)
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// TickTime is the default time we use to reload zone. Exported to be tweaked in tests.
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var TickTime = 1 * time.Minute
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// Reload reloads a zone when it is changed on disk. If z.NoRoload is true, no reloading will be done.
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func (z *Zone) Reload() error {
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if z.NoReload {
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return nil
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}
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tick := time.NewTicker(TickTime)
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go func() {
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for {
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select {
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case <-tick.C:
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zFile := z.File()
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reader, err := os.Open(zFile)
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if err != nil {
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log.Errorf("Failed to open zone %q in %q: %v", z.origin, zFile, err)
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continue
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}
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serial := z.SOASerialIfDefined()
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zone, err := Parse(reader, z.origin, zFile, serial)
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if err != nil {
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if _, ok := err.(*serialErr); !ok {
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log.Errorf("Parsing zone %q: %v", z.origin, err)
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}
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continue
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}
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// copy elements we need
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z.reloadMu.Lock()
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z.Apex = zone.Apex
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z.Tree = zone.Tree
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z.reloadMu.Unlock()
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log.Infof("Successfully reloaded zone %q in %q with serial %d", z.origin, zFile, z.Apex.SOA.Serial)
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z.Notify()
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case <-z.reloadShutdown:
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tick.Stop()
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return
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}
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}
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}()
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return nil
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}
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// SOASerialIfDefined returns the SOA's serial if the zone has a SOA record in the Apex, or
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// -1 otherwise.
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func (z *Zone) SOASerialIfDefined() int64 {
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z.reloadMu.Lock()
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defer z.reloadMu.Unlock()
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if z.Apex.SOA != nil {
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return int64(z.Apex.SOA.Serial)
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}
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return -1
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}
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