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2596a9e630
* MM-32893: Refactor the getting of DB handle We add a method in *SqlStore that returns the correct DB handle depending on the context. https://mattermost.atlassian.net/browse/MM-32893 ```release-note NONE ``` * fix receiver name
45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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package sqlstore
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import (
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"context"
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"github.com/mattermost/gorp"
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)
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// storeContextKey is the base type for all context keys for the store.
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type storeContextKey string
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// contextValue is a type to hold some pre-determined context values.
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type contextValue string
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// Different possible values of contextValue.
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const (
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useMaster contextValue = "useMaster"
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)
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// WithMaster adds the context value that master DB should be selected for this request.
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func WithMaster(ctx context.Context) context.Context {
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return context.WithValue(ctx, storeContextKey(useMaster), true)
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}
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// hasMaster is a helper function to check whether master DB should be selected or not.
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func hasMaster(ctx context.Context) bool {
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if v := ctx.Value(storeContextKey(useMaster)); v != nil {
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if res, ok := v.(bool); ok && res {
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return true
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}
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}
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return false
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}
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// DBFromContext is a helper utility that returns the DB handle from a given context.
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func (ss *SqlStore) DBFromContext(ctx context.Context) *gorp.DbMap {
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if hasMaster(ctx) {
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return ss.GetMaster()
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}
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return ss.GetReplica()
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}
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