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Create the config and namespace filterer (#457)
* feat: add namespaceSelector config * feat update values.yaml with namespaceSelector * feat: add namespace filterer * chore: bump chart to v.3.5.4 * feat: add namespace cache
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| package discovery | ||
|
|
||
| import ( | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| const ( | ||
| // DefaultInterval is default interval to execute the "garbage collection" of the cache. | ||
| DefaultInterval = 15 * time.Minute | ||
| ) | ||
|
|
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| type cachedData map[string]bool | ||
|
|
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| // NamespaceCache provides an interface to add and retrieve namespaces from the cache. | ||
| type NamespaceCache interface { | ||
| Put(namespace string, match bool) | ||
| Match(namespace string) (bool, bool) | ||
| } | ||
|
|
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| type NamespaceInMemoryStore struct { | ||
| cache cachedData | ||
| locker *sync.RWMutex | ||
| logger *logrus.Logger | ||
| lastVacuum time.Time | ||
| ticker *time.Ticker | ||
| stopChannel chan struct{} | ||
| } | ||
|
|
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| func NewNamespaceInMemoryStore(interval time.Duration, logger *logrus.Logger) *NamespaceInMemoryStore { | ||
| cm := &NamespaceInMemoryStore{ | ||
| cache: make(cachedData), | ||
| locker: &sync.RWMutex{}, | ||
| logger: logger, | ||
| // ticker interval should be slightly smaller than the integration interval. | ||
| ticker: time.NewTicker(interval), | ||
| stopChannel: make(chan struct{}), | ||
| } | ||
|
|
||
| go func() { | ||
| for { | ||
| select { | ||
| case <-cm.ticker.C: | ||
| cm.vacuum() | ||
| case <-cm.stopChannel: | ||
| return | ||
| } | ||
| } | ||
| }() | ||
|
|
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| return cm | ||
| } | ||
|
|
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| func (m *NamespaceInMemoryStore) Put(namespace string, match bool) { | ||
| m.locker.Lock() | ||
| defer m.locker.Unlock() | ||
|
|
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| m.cache[namespace] = match | ||
| } | ||
|
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| func (m *NamespaceInMemoryStore) Match(namespace string) (bool, bool) { | ||
| m.locker.Lock() | ||
| defer m.locker.Unlock() | ||
|
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| match, found := m.cache[namespace] | ||
|
|
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| return match, found | ||
| } | ||
|
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| // StopVacuum Stops the goroutine in charge of the vacuum of the cache. | ||
| func (m *NamespaceInMemoryStore) StopVacuum() { | ||
| m.logger.Debugf("stopping namespace cache vacuum goroutine") | ||
| m.ticker.Stop() | ||
| close(m.stopChannel) | ||
| } | ||
|
|
||
| // vacuum removes the cached data entries on each interval. | ||
| func (m *NamespaceInMemoryStore) vacuum() { | ||
| m.locker.Lock() | ||
| defer m.locker.Unlock() | ||
|
|
||
| m.logger.Debugf("cleaning cache: len %d ...", len(m.cache)) | ||
| m.cache = make(cachedData) | ||
| m.logger.Debugf("cache cleaned: len %d ...", len(m.cache)) | ||
| } |
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