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34 lines
1.2 KiB
34 lines
1.2 KiB
// 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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