31 lines
956 B
Go
31 lines
956 B
Go
package gocron
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import (
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"context"
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"errors"
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)
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var (
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ErrFailedToConnectToRedis = errors.New("gocron: failed to connect to redis")
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ErrFailedToObtainLock = errors.New("gocron: failed to obtain lock")
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ErrFailedToReleaseLock = errors.New("gocron: failed to release lock")
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)
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// Locker represents the required interface to lock jobs when running multiple schedulers.
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type Locker interface {
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// Lock if an error is returned by lock, the job will not be scheduled.
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Lock(ctx context.Context, key string) (Lock, error)
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}
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// Lock represents an obtained lock
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type Lock interface {
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Unlock(ctx context.Context) error
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}
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// Elector determines the leader from instances asking to be the leader. Only
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// the leader runs jobs. If the leader goes down, a new leader will be elected.
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type Elector interface {
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// IsLeader should return an error if the job should not be scheduled and nil if the job should be scheduled.
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IsLeader(ctx context.Context) error
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}
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