d0f5aa670b
Our context package predates the establishment of current best practices regarding context usage and it shows. It encourages bad practices such as using contexts to propagate non-request-scoped values like the application version and using string-typed keys for context values. Move the package internal to remove it from the API surface of distribution/v3@v3.0.0 so we are free to iterate on it without being constrained by compatibility. Signed-off-by: Cory Snider <csnider@mirantis.com>
25 lines
717 B
Go
25 lines
717 B
Go
package dcontext
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import (
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"context"
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"time"
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)
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// Since looks up key, which should be a time.Time, and returns the duration
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// since that time. If the key is not found, the value returned will be zero.
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// This is helpful when inferring metrics related to context execution times.
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func Since(ctx context.Context, key interface{}) time.Duration {
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if startedAt, ok := ctx.Value(key).(time.Time); ok {
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return time.Since(startedAt)
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}
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return 0
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}
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// GetStringValue returns a string value from the context. The empty string
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// will be returned if not found.
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func GetStringValue(ctx context.Context, key interface{}) (value string) {
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if valuev, ok := ctx.Value(key).(string); ok {
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value = valuev
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}
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return value
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}
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