forked from TrueCloudLab/frostfs-node
85 lines
1.7 KiB
Go
85 lines
1.7 KiB
Go
package tombstone
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import (
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"fmt"
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"github.com/TrueCloudLab/frostfs-node/pkg/util/logger"
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lru "github.com/hashicorp/golang-lru"
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"go.uber.org/zap"
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)
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const defaultLRUCacheSize = 100
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type cfg struct {
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log *logger.Logger
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cacheSize int
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tsSource Source
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}
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// Option is an option of ExpirationChecker's constructor.
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type Option func(*cfg)
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func defaultCfg() *cfg {
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return &cfg{
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log: &logger.Logger{Logger: zap.NewNop()},
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cacheSize: defaultLRUCacheSize,
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}
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}
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// NewChecker creates, initializes and returns tombstone ExpirationChecker.
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// The returned structure is ready to use.
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//
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// Panics if any of the provided options does not allow
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// constructing a valid tombstone ExpirationChecker.
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func NewChecker(oo ...Option) *ExpirationChecker {
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cfg := defaultCfg()
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for _, o := range oo {
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o(cfg)
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}
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panicOnNil := func(v interface{}, name string) {
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if v == nil {
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panic(fmt.Sprintf("tombstone getter constructor: %s is nil", name))
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}
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}
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panicOnNil(cfg.tsSource, "Tombstone source")
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cache, err := lru.New(cfg.cacheSize)
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if err != nil {
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panic(fmt.Errorf("could not create LRU cache with %d size: %w", cfg.cacheSize, err))
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}
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return &ExpirationChecker{
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cache: cache,
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log: cfg.log,
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tsSource: cfg.tsSource,
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}
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}
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// WithLogger returns an option to specify
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// logger.
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func WithLogger(v *logger.Logger) Option {
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return func(c *cfg) {
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c.log = v
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}
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}
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// WithCacheSize returns an option to specify
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// LRU cache size.
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func WithCacheSize(v int) Option {
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return func(c *cfg) {
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c.cacheSize = v
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}
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}
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// WithTombstoneSource returns an option
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// to specify tombstone source.
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func WithTombstoneSource(v Source) Option {
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return func(c *cfg) {
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c.tsSource = v
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}
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}
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