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