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35 lines
1.2 KiB
35 lines
1.2 KiB
3 years ago
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// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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package internal
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import "context"
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// backgroundContext is an implementation of the context.Context interface that wraps a child Context. Value requests
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// are forwarded to the child Context but the Done and Err functions are overridden to ensure the new context does not
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// time out or get cancelled.
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type backgroundContext struct {
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context.Context
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childValuesCtx context.Context
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}
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// NewBackgroundContext creates a new Context whose behavior matches that of context.Background(), but Value calls are
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// forwarded to the provided ctx parameter. If ctx is nil, context.Background() is returned.
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func NewBackgroundContext(ctx context.Context) context.Context {
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if ctx == nil {
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return context.Background()
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}
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return &backgroundContext{
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Context: context.Background(),
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childValuesCtx: ctx,
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}
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}
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func (b *backgroundContext) Value(key interface{}) interface{} {
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return b.childValuesCtx.Value(key)
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}
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