Forbid registering the same metrics twice

Jimdo / prometheus_client_php

Prometheus instrumentation library for PHP applications

Apache License 2.0

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Closed bracki closed 8 years ago

bracki commented 8 years ago

This addresses #19.

TODO:

[x] Do we also need to check the storage if the metric exists? We could run into the issue that the same metric is registered twice in different code paths that aren't exercised in the same request. We decided against doing this.