wehub-resource-sync
59 lines
2.0 KiB
Go
59 lines
2.0 KiB
Go
/*
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* Copyright 2026 CloudWeGo Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package internal
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import "github.com/google/uuid"
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// EinoMsgIDKey is the Extra key used to store the eino-internal message ID.
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const EinoMsgIDKey = "_eino_msg_id"
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// GetMessageID returns the message ID from Extra, or "" if not set.
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// Works with any map[string]any (Message.Extra or AgenticMessage.Extra).
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func GetMessageID(extra map[string]any) string {
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if extra == nil {
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return ""
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}
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id, _ := extra[EinoMsgIDKey].(string)
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return id
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}
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// SetMessageID sets the message ID in Extra and returns the resulting map.
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//
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// Copy-on-write: the input map is never mutated, because a message's Extra can
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// be shared across fan-out stream readers and an in-place write would race with
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// concurrent reads (fatal "concurrent map read and map write"). Reassigning the
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// returned map to a shared Extra field is still a field-level race that cannot
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// be eliminated while Extra is exported; COW only removes the map-level panic.
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func SetMessageID(extra map[string]any, id string) map[string]any {
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next := make(map[string]any, len(extra)+1)
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for k, v := range extra {
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next[k] = v
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}
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next[EinoMsgIDKey] = id
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return next
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}
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// EnsureMessageID assigns a UUID v4 if no message ID is present.
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// Idempotent: if ID already set, no-op.
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// Returns the (possibly newly created) Extra map.
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func EnsureMessageID(extra map[string]any) map[string]any {
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if GetMessageID(extra) != "" {
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return extra
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}
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return SetMessageID(extra, uuid.NewString())
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}
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