31 lines
905 B
Go
31 lines
905 B
Go
// Package opname contains an extensible "operation name" construct for go
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// applications. This allows a user to create a base operation, eg:
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// "createWidget" and then sub-operations such as "pgSaveWidget" and they will
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// get composed such as "createWidget.pgSaveWidget" in log lines. Each
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// operation name adds a lightweight "layer" to the context.
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package opname
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import (
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"context"
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)
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type ctxKey int
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const key ctxKey = iota
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// Get fetches the operation name from the given context.
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func Get(ctx context.Context) (string, bool) {
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val, ok := ctx.Value(key).(string)
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return val, ok
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}
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// With stores the current operation name to the context, optionally prepending
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// the existing operation name in the context if it exists.
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func With(ctx context.Context, name string) context.Context {
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prep, ok := Get(ctx)
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if ok {
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name = prep + "." + name
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}
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return context.WithValue(ctx, key, name)
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} |