extending.md

Extending

Creating own response factory

Implement ResponseFactoryInterface which consumes the metric group source and produces PSR-7 Response

Sourcing

These could provide any metrics, i.e FS stats, exec result, API calls, etc, represented with lazily wrapped MetricInterface implementation

Current extensions

Storage

• AbstractDoctrineStorage provides metrics stored with Doctrine 2 ORM powered with DBAL. Atomic adjustments allowed

Response formats

Common options:

• prefix option allows you to add the prefix to every metric name in every group

Built-in formats

• TelegrafJsonResponseFactory (telegraf_json) creates telegraf JSON compatible output with the following options
  • propagate_tags allows you to display metric tags on the group level. In case of different tag values the one rendered later will win
  • group_by_tags allows you to create nested groups according to tag value. Usually you want also propagate these tags
• PrometheusResponseFactory (prometheus) creates prometheus compatible output