| |
|
|
| from __future__ import unicode_literals |
|
|
| from ..utils import floatToGoString |
|
|
| CONTENT_TYPE_LATEST = str('application/openmetrics-text; version=0.0.1; charset=utf-8') |
| """Content type of the latest OpenMetrics text format""" |
|
|
|
|
| def generate_latest(registry): |
| '''Returns the metrics from the registry in latest text format as a string.''' |
| output = [] |
| for metric in registry.collect(): |
| try: |
| mname = metric.name |
| output.append('# HELP {0} {1}\n'.format( |
| mname, metric.documentation.replace('\\', r'\\').replace('\n', r'\n').replace('"', r'\"'))) |
| output.append('# TYPE {0} {1}\n'.format(mname, metric.type)) |
| if metric.unit: |
| output.append('# UNIT {0} {1}\n'.format(mname, metric.unit)) |
| for s in metric.samples: |
| if s.labels: |
| labelstr = '{{{0}}}'.format(','.join( |
| ['{0}="{1}"'.format( |
| k, v.replace('\\', r'\\').replace('\n', r'\n').replace('"', r'\"')) |
| for k, v in sorted(s.labels.items())])) |
| else: |
| labelstr = '' |
| if s.exemplar: |
| if metric.type not in ('histogram', 'gaugehistogram') or not s.name.endswith('_bucket'): |
| raise ValueError("Metric {0} has exemplars, but is not a histogram bucket".format(metric.name)) |
| labels = '{{{0}}}'.format(','.join( |
| ['{0}="{1}"'.format( |
| k, v.replace('\\', r'\\').replace('\n', r'\n').replace('"', r'\"')) |
| for k, v in sorted(s.exemplar.labels.items())])) |
| if s.exemplar.timestamp is not None: |
| exemplarstr = ' # {0} {1} {2}'.format( |
| labels, |
| floatToGoString(s.exemplar.value), |
| s.exemplar.timestamp, |
| ) |
| else: |
| exemplarstr = ' # {0} {1}'.format( |
| labels, |
| floatToGoString(s.exemplar.value), |
| ) |
| else: |
| exemplarstr = '' |
| timestamp = '' |
| if s.timestamp is not None: |
| timestamp = ' {0}'.format(s.timestamp) |
| output.append('{0}{1} {2}{3}{4}\n'.format( |
| s.name, |
| labelstr, |
| floatToGoString(s.value), |
| timestamp, |
| exemplarstr, |
| )) |
| except Exception as exception: |
| exception.args = (exception.args or ('',)) + (metric,) |
| raise |
|
|
| output.append('# EOF\n') |
| return ''.join(output).encode('utf-8') |
|
|
