59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
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package native
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import (
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"context"
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"sync"
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"time"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
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)
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const networkCacheTTL = time.Minute
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var networkInfoCache = &networkInfoCacheT{}
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type networkInfoCacheT struct {
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guard sync.RWMutex
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current *netmap.NetworkInfo
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fetchTS time.Time
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}
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func (c *networkInfoCacheT) getOrFetch(ctx context.Context, cli *client.Client) (*netmap.NetworkInfo, error) {
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if v := c.get(); v != nil {
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return v, nil
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}
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return c.fetch(ctx, cli)
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}
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func (c *networkInfoCacheT) get() *netmap.NetworkInfo {
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c.guard.RLock()
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defer c.guard.RUnlock()
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if c.current == nil || time.Since(c.fetchTS) > networkCacheTTL {
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return nil
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}
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return c.current
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}
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func (c *networkInfoCacheT) fetch(ctx context.Context, cli *client.Client) (*netmap.NetworkInfo, error) {
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c.guard.Lock()
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defer c.guard.Unlock()
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if time.Since(c.fetchTS) <= networkCacheTTL {
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return c.current, nil
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}
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res, err := cli.NetworkInfo(ctx, client.PrmNetworkInfo{})
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if err != nil {
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return nil, err
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}
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v := res.Info()
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c.current = &v
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c.fetchTS = time.Now()
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return c.current, nil
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}
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