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diff --git a/lib/prometheus/error.ex b/lib/prometheus/error.ex
index a2f4a75..78f7b52 100644
--- a/lib/prometheus/error.ex
+++ b/lib/prometheus/error.ex
@@ -1,230 +1,224 @@
defmodule Prometheus.InvalidValueError do
@moduledoc """
Raised when given `value` is invalid i.e. when you pass a negative number to
`Prometheus.Metric.Counter.inc/2`.
"""
defexception [:value, :orig_message]
def message(%{value: value, orig_message: message}) do
"Invalid value: #{inspect(value)} (#{message})."
end
end
defmodule Prometheus.InvalidMetricNameError do
@moduledoc """
Raised when given metric `name` is invalid i.e. can't be represented as printable utf-8
string that matches `^[a-zA-Z_:][a-zA-Z0-9_:]*$` regular expression.
"""
defexception [:name]
def message(%{name: name}) do
"Invalid metric name: #{name}."
end
end
defmodule Prometheus.InvalidMetricLabelsError do
@moduledoc """
Raised when `labels` isn't a list.
"""
defexception [:labels]
def message(%{labels: labels}) do
"Invalid metric labels: #{labels}."
end
end
defmodule Prometheus.InvalidMetricHelpError do
@moduledoc """
Raised when given metric `help` is invalid i.e. isn't a printable utf-8 string.
"""
defexception [:help]
def message(%{help: help}) do
"Invalid metric help: #{help}."
end
end
defmodule Prometheus.InvalidMetricArityError do
@moduledoc """
Raised when metric arity is invalid e.g. counter metric was created with two labels but
only one label value is passed to `Prometheus.Metric.Counter.inc/2`.
"""
defexception [:present, :expected]
def message(%{present: present, expected: expected}) do
"Invalid metric arity: got #{present}, expected #{expected}."
end
end
defmodule Prometheus.UnknownMetricError do
defexception [:registry, :name]
def message(%{registry: registry, name: name}) do
"Unknown metric {registry: #{registry}, name: #{name}}."
end
end
defmodule Prometheus.InvalidLabelNameError do
@moduledoc """
Raised when label `name` is invalid i.e. can't be represented as printable utf-8 string
that matches `^[a-zA-Z_][a-zA-Z0-9_]*$` regular expression or starts with `__`.
Metric can impose further restrictions on label names.
"""
defexception [:name, :orig_message]
def message(%{name: name, orig_message: message}) do
"Invalid label name: #{name} (#{message})."
end
end
defmodule Prometheus.MFAlreadyExistsError do
@moduledoc """
Raised when one tries to create metric in `registry` with `name` it already exists.
"""
defexception [:registry, :name]
def message(%{registry: registry, name: name}) do
"Metric #{registry}:#{name} already exists."
end
end
defmodule Prometheus.NoBucketsError do
@moduledoc """
Raised by histogram constructors when buckets can't be found in spec, or
found value is empty list.
"""
defexception [:buckets]
def message(%{buckets: buckets}) do
"Invalid histogram buckets: #{buckets}."
end
end
defmodule Prometheus.InvalidBucketsError do
@moduledoc """
Raised by histogram constructors when buckets are invalid i.e. not sorted in increasing
order or generator spec is unknown.
"""
defexception [:buckets, :orig_message]
def message(%{buckets: buckets, orig_message: message}) do
buckets = :io_lib.format("~p", [buckets])
"Invalid histogram buckets: #{buckets} (#{message})."
end
end
defmodule Prometheus.InvalidBoundError do
@moduledoc """
Raised by histogram constructors when bucket bound isn't a number.
"""
defexception [:bound]
def message(%{bound: bound}) do
"Invalid histogram bound: #{bound}."
end
end
defmodule Prometheus.MissingMetricSpecKeyError do
@moduledoc """
Raised when required metric `spec` `key` is missing. All metrics
require at least `name` and when metric created `help`.
Metrics can have their specific required keys.
"""
defexception [:key, :spec]
def message(%{key: key}) do
"Required key #{key} is missing from metric spec."
end
end
defmodule Prometheus.InvalidBlockArityError do
@moduledoc """
Raised when fn passed as block has more then 0 arguments
"""
defexception [:args]
def message(%{args: args}) do
insp = Enum.map_join(args, ", ", &inspect/1)
"Fn with arity #{length(args)} (args: #{insp}) passed as block."
end
end
defmodule Prometheus.Error do
@moduledoc false
# credo:disable-for-this-file Credo.Check.Refactor.ABCSize
# credo:disable-for-this-file Credo.Check.Refactor.CyclomaticComplexity
def normalize(erlang_error) do
case erlang_error do
%ErlangError{original: original} ->
case original do
{:invalid_value, value, message} ->
%Prometheus.InvalidValueError{value: value, orig_message: message}
{:invalid_metric_name, name, _message} ->
%Prometheus.InvalidMetricNameError{name: name}
{:invalid_metric_help, help, _message} ->
%Prometheus.InvalidMetricHelpError{help: help}
{:invalid_metric_arity, present, expected} ->
%Prometheus.InvalidMetricArityError{present: present, expected: expected}
{:unknown_metric, registry, name} ->
%Prometheus.UnknownMetricError{registry: registry, name: name}
{:invalid_metric_labels, labels, _message} ->
%Prometheus.InvalidMetricLabelsError{labels: labels}
{:invalid_metric_label_name, name, message} ->
%Prometheus.InvalidLabelNameError{name: name, orig_message: message}
{:mf_already_exists, {registry, name}, _message} ->
%Prometheus.MFAlreadyExistsError{registry: registry, name: name}
{:no_buckets, buckets} ->
%Prometheus.NoBucketsError{buckets: buckets}
{:invalid_buckets, buckets, message} ->
%Prometheus.InvalidBucketsError{
buckets: buckets,
orig_message: message
}
{:invalid_bound, bound} ->
%Prometheus.InvalidBoundError{bound: bound}
{:missing_metric_spec_key, key, spec} ->
%Prometheus.MissingMetricSpecKeyError{key: key, spec: spec}
_ ->
erlang_error
end
_ ->
erlang_error
end
end
defmacro with_prometheus_error(block) do
quote do
try do
unquote(block)
rescue
e in ErlangError ->
reraise(
Prometheus.Error.normalize(e),
- unquote(
- if macro_exported?(Kernel.SpecialForms, :__STACKTRACE__, 0) do
- quote(do: __STACKTRACE__)
- else
- quote(do: System.stacktrace())
- end
- )
+ unquote(quote(do: __STACKTRACE__))
)
end
end
end
end

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