def map(self):
"""
The map method does several things:
1) if the RRD object (instantiated from this class or a subclass)
is in "write" mode, there is no need to parse the XML and map
it; there is already an object representation. In this case, the
majority of this method is skipped.
2) if the RRD object is in "read" mode, it needs to pull data out
of the rrd file; it does this by loading (which dumps to XML and
then reads in the XML).
3) once the XML has been parsed, it maps the XML to objects.
"""
if self.mode == "w":
return
# The backend is defined by the subclass of this class, as is the
# filename.
tree = self.backend.load(self.filename)
node = RRDXMLNode(tree)
super(RRDMapper, self).map(node)
for subNode in node.ds:
ds = DSMapper()
ds.map(subNode)
self.ds.append(ds)
for subNode in node.rra:
rra = RRAMapper()
rra.map(subNode)
self.rra.append(rra)
def test_creationRRAParams(self):
rrd = RRDXMLNode(self.tree)
self.assertEquals(len(rrd.rra), 2)
rra1 = rrd.rra[0]
self.assertEquals(rra1.getAttribute("xff"), "5.0000000000e-01")
rra2 = rrd.rra[1]
self.assertEquals(rra2.getAttribute("xff"), "5.0000000000e-01")
def test_creationDS(self):
dsChecks = [("name", "speed"), ("type", "COUNTER"),
("minimal_heartbeat", "600"), ("min", "NaN"),
("max", "NaN"), ("last_ds", "UNKN"),
("value", "0.0000000000e+00"), ("unknown_sec", "0")]
rrd = RRDXMLNode(self.tree)
self.assertEquals(len(rrd.ds), 1)
ds = rrd.ds[0]
for name, value in dsChecks:
self.assertEquals(ds.getAttribute(name), value)
def test_creationRRA(self):
rra1Checks = [("cf", "AVERAGE"), ("pdp_per_row", "1")]
rra2Checks = [("cf", "AVERAGE"), ("pdp_per_row", "6")]
rrd = RRDXMLNode(self.tree)
self.assertEquals(len(rrd.rra), 2)
rra1 = rrd.rra[0]
for name, value in rra1Checks:
self.assertEquals(rra1.getAttribute(name), value)
rra2 = rrd.rra[1]
for name, value in rra2Checks:
self.assertEquals(rra2.getAttribute(name), value)
def test_creationRRACDPPrep(self):
dsChecks = [("primary_value", "0.0000000000e+00"),
("secondary_value", "0.0000000000e+00"), ("value", "NaN"),
("unknown_datapoints", "0")]
rrd = RRDXMLNode(self.tree)
cdpPrep1 = rrd.rra[0].cdp_prep
self.assertEquals(len(cdpPrep1.ds), 1)
for name, value in dsChecks:
self.assertEquals(cdpPrep1.ds[0].getAttribute(name), value)
cdpPrep2 = rrd.rra[1].cdp_prep
self.assertEquals(len(cdpPrep2.ds), 1)
for name, value in dsChecks:
self.assertEquals(cdpPrep2.ds[0].getAttribute(name), value)
def test_creationIncludeData(self):
rrd = RRDXMLNode(self.tree, includeData=True)
def test_creation(self):
rrd = RRDXMLNode(self.tree)
self.assertEquals(rrd.getAttribute("version"), "0003")
self.assertEquals(rrd.getAttribute("step"), "300")
self.assertEquals(rrd.getAttribute("lastupdate"), "920804400")
def test_creation(self):
rrd = RRDXMLNode(self.tree)
self.assertEquals(rrd.getAttribute("version"), "0003")
self.assertEquals(rrd.getAttribute("step"), "300")
self.assertEquals(rrd.getAttribute("lastupdate"), "920804400")