38 lines
805 B
Go
38 lines
805 B
Go
package webconnectivity
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import "sync"
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// DNSCache wraps a model.Resolver to provide DNS caching.
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//
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// The zero value is invalid; please, use NewDNSCache to construct.
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type DNSCache struct {
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// mu provides mutual exclusion.
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mu *sync.Mutex
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// values contains already resolved values.
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values map[string][]string
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}
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// Get gets values from the cache
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func (c *DNSCache) Get(domain string) ([]string, bool) {
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c.mu.Lock()
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values, found := c.values[domain]
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c.mu.Unlock()
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return values, found
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}
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// Set inserts into the cache
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func (c *DNSCache) Set(domain string, values []string) {
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c.mu.Lock()
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c.values[domain] = values
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c.mu.Unlock()
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}
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// NewDNSCache creates a new DNSCache instance.
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func NewDNSCache() *DNSCache {
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return &DNSCache{
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mu: &sync.Mutex{},
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values: map[string][]string{},
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}
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}
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