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Step flow manager for Elixir applications
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lib/step_flow/metrics/workflow_instrumenter.ex
defmodule StepFlow.Metrics.WorkflowInstrumenter do
@moduledoc """
Prometheus metrics instrumenter to call workflow metric collectors
"""
alias StepFlow.Workflows
use Prometheus.Metric
def setup do
Prometheus.Registry.register_collector(StepFlow.Metrics.WorkflowCollector)
Counter.declare(
name: :step_flow_workflows_created,
help: "Number of created workflows.",
labels: [:identifier]
)
Counter.declare(
name: :step_flow_workflows_error,
help: "Number of failed workflows.",
labels: [:identifier]
)
Counter.declare(
name: :step_flow_workflows_completed,
help: "Number of completed workflows.",
labels: [:identifier]
)
end
def inc(:step_flow_workflows_created, identifier) do
if StepFlow.Configuration.metrics_enabled?() do
Counter.inc(
name: :step_flow_workflows_created,
labels: [identifier]
)
end
end
def inc(:step_flow_workflows_error, workflow_id) do
if StepFlow.Configuration.metrics_enabled?() do
with %{identifier: identifier} <- Workflows.get_workflow!(workflow_id) do
Counter.inc(
name: :step_flow_workflows_error,
labels: [identifier]
)
end
end
end
def inc(:step_flow_workflows_completed, identifier) do
if StepFlow.Configuration.metrics_enabled?() do
Counter.inc(
name: :step_flow_workflows_completed,
labels: [identifier]
)
end
end
end