47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package models
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import (
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"errors"
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"strings"
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)
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// ConsistencyLevel represent a required replication criteria before a write can
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// be returned as successful
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type ConsistencyLevel int
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const (
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// ConsistencyLevelAny allows for hinted hand off, potentially no write happened yet
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ConsistencyLevelAny ConsistencyLevel = iota
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// ConsistencyLevelOne requires at least one data node acknowledged a write
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ConsistencyLevelOne
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// ConsistencyLevelQuorum requires a quorum of data nodes to acknowledge a write
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ConsistencyLevelQuorum
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// ConsistencyLevelAll requires all data nodes to acknowledge a write
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ConsistencyLevelAll
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)
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var (
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// ErrInvalidConsistencyLevel is returned when parsing the string version
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// of a consistency level.
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ErrInvalidConsistencyLevel = errors.New("invalid consistency level")
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)
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// ParseConsistencyLevel converts a consistency level string to the corresponding ConsistencyLevel const
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func ParseConsistencyLevel(level string) (ConsistencyLevel, error) {
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switch strings.ToLower(level) {
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case "any":
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return ConsistencyLevelAny, nil
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case "one":
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return ConsistencyLevelOne, nil
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case "quorum":
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return ConsistencyLevelQuorum, nil
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case "all":
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return ConsistencyLevelAll, nil
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default:
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return 0, ErrInvalidConsistencyLevel
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}
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}
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