59 lines
1.7 KiB
Go
59 lines
1.7 KiB
Go
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// Copyright (C) MongoDB, Inc. 2022-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 (
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"context"
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"time"
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)
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type timeoutKey struct{}
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// MakeTimeoutContext returns a new context with Client-Side Operation Timeout (CSOT) feature-gated behavior
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// and a Timeout set to the passed in Duration. Setting a Timeout on a single operation is not supported in
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// public API.
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//
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// TODO(GODRIVER-2348) We may be able to remove this function once CSOT feature-gated behavior becomes the
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// TODO default behavior.
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func MakeTimeoutContext(ctx context.Context, to time.Duration) (context.Context, context.CancelFunc) {
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// Only use the passed in Duration as a timeout on the Context if it
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// is non-zero.
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cancelFunc := func() {}
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if to != 0 {
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ctx, cancelFunc = context.WithTimeout(ctx, to)
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}
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return context.WithValue(ctx, timeoutKey{}, true), cancelFunc
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}
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func IsTimeoutContext(ctx context.Context) bool {
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return ctx.Value(timeoutKey{}) != nil
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}
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// ZeroRTTMonitor implements the RTTMonitor interface and is used internally for testing. It returns 0 for all
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// RTT calculations and an empty string for RTT statistics.
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type ZeroRTTMonitor struct{}
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// EWMA implements the RTT monitor interface.
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func (zrm *ZeroRTTMonitor) EWMA() time.Duration {
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return 0
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}
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// Min implements the RTT monitor interface.
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func (zrm *ZeroRTTMonitor) Min() time.Duration {
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return 0
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}
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// P90 implements the RTT monitor interface.
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func (zrm *ZeroRTTMonitor) P90() time.Duration {
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return 0
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}
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// Stats implements the RTT monitor interface.
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func (zrm *ZeroRTTMonitor) Stats() string {
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return ""
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}
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