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Merge pull request #986 from prometheus/fabxc/tpdoc
Clarify docs of TargetProvider
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@ -33,7 +33,10 @@ import (
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//
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// The TargetProvider does not have to guarantee that an actual change happened.
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// It does guarantee that it sends the new TargetGroup whenever a change happens.
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// On startup it sends all TargetGroups it can see.
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//
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// Sources() is guaranteed to be called exactly once before each call to Run().
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// On a call to Run() implementing types must send a valid target group for each of
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// the sources they declared in the last call to Sources().
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type TargetProvider interface {
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// Sources returns the source identifiers the provider is currently aware of.
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Sources() []string
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