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37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
// Package outboxid 提供公共 Outbox 稳定事件标识生成能力。
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package outboxid
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import (
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"crypto/sha256"
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"encoding/hex"
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"errors"
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"unicode/utf8"
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"github.com/break/junhong_cmp_fiber/pkg/constants"
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)
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// Stable 保留未超限标识；超限时保留业务前缀并追加稳定摘要。
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func Stable(prefix, value string) string {
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candidate := prefix + value
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if utf8.RuneCountInString(candidate) <= constants.OutboxEventIDMaxLength {
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return candidate
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}
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digest := sha256.Sum256([]byte(candidate))
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encoded := hex.EncodeToString(digest[:])
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if len(prefix) >= constants.OutboxEventIDMaxLength {
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return encoded
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}
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return prefix + encoded[:constants.OutboxEventIDMaxLength-len(prefix)]
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}
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// Validate 校验公共 Outbox 事件及父事件标识的数据库长度契约。
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func Validate(eventID, parentEventID string) error {
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if utf8.RuneCountInString(eventID) > constants.OutboxEventIDMaxLength {
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return errors.New("Outbox 事件ID超过64字符上限")
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}
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if utf8.RuneCountInString(parentEventID) > constants.OutboxEventIDMaxLength {
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return errors.New("Outbox 父事件ID超过64字符上限")
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}
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return nil
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}
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