From 69c220cda3d8c0a95327630f5752dad36cb82261 Mon Sep 17 00:00:00 2001
From: Yves Fischer <yvesf-git@xapek.org>
Date: Tue, 17 Jul 2018 12:34:04 +0200
Subject: Squashed commit

---
 scheduler/influxdb.py | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 scheduler/influxdb.py

(limited to 'scheduler/influxdb.py')

diff --git a/scheduler/influxdb.py b/scheduler/influxdb.py
new file mode 100644
index 0000000..ecfa6ea
--- /dev/null
+++ b/scheduler/influxdb.py
@@ -0,0 +1,68 @@
+import logging
+import reprlib
+import typing
+from urllib.request import urlopen
+
+import collections
+from pyinflux.client import Line
+
+from . import Job
+
+
+def _get_measurement_name(job: Job):
+    if 'measurement' in job.properties:
+        return job.properties['measurement']
+    else:
+        return job.name
+
+
+class Dumper:
+    def __init__(self):
+        self._repr = reprlib.Repr()
+
+    def __call__(self, *args, **kwargs) -> None:
+        if len(args) == 2 and isinstance(args[0], Job):
+            # assuming second is list of objects that str() to influx protocol lines
+            data = self._convert(args[0], args[1])
+            self._insert(data)
+        else:
+            raise Exception("Wrong arguments for InfluxDB inserter.")
+
+    def _insert(self, lines: typing.Iterable):
+        data = "\n".join(map(str, lines))
+        print("===== Would insert:\n" + data)
+
+    def _convert(self, job: Job, data) -> typing.Iterable[Line]:
+        def c(name, value):
+            if isinstance(value, Line):
+                return value
+            elif isinstance(value, int) or isinstance(value, str) or isinstance(value, float):
+                return Line(name, {}, {'value': value})
+            else:
+                raise Exception("Cannot simply insert value of type: {} for job {}".format(type(value), job))
+
+        measurement = _get_measurement_name(job)
+        if isinstance(data, collections.Iterable):
+            return map(lambda v: c(measurement, v), data)
+        else:
+            return [c(measurement, data)]
+
+
+class Inserter(Dumper):
+    def __init__(self, url: str) -> None:
+        super().__init__()
+        self._url: str = url
+
+    def _insert(self, lines: typing.Iterable):
+        try:
+            data = "\n".join(map(str, lines)).encode('utf-8')
+            try:
+                with urlopen(self._url, data) as fh:
+                    logging.debug("InfluxDB successful answer: %s", self._repr.repr(fh.read().decode('utf-8')))
+            except Exception:
+                logging.exception("Failed insert of:\n%s", self._repr.repr(lines))
+        except Exception:
+            logging.exception("Failed formatting of:\n%s", self._repr.repr(lines))
+
+    def __repr__(self):
+        return f"<{self.__class__.__module__}.{self.__class__.__name__} url={repr(self._url)}>"
-- 
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