def request_index(request, request_id):
"""
Detail page on a specific request (i.e. DAGManJobId@<submit host>) by
creating an SVG representation of the executing DAG.
"""
# Load the template.
t = loader.get_template('monitor/request_svg.html')
# Get the bb entries.
dagManJobId, host = request_id.split('@', 1)
(dataset, user, requestId, stages) = blackboard.getOSFEntry(dagManJobId)
# Filter out all the spurious ones.
# FIXME: Maybe do this a bit better, huh?
hh = host + '#'
stages = [s for s in stages if s.GlobalJobId.startswith(hh)]
# Create the DOT graph.
dot = pydot.Dot(type='digraph')
# Keep track of node names vs node ids.
nodes = {} # {node name: [node id1, node id2, ...]}
for stage in stages:
nodeId = '%d.%d' % (stage.ClusterId, stage.ProcId)
# Remember that if a condor job is on hold, it will have an ExitCode =
# None and a JobState = Exited.
if(stage.JobState != 'Exited'):
nodeLabel = '%s - %s' % (stage.DAGNodeName,
stage.JobState)
elif(stage.ExitCode == None):
# The corresponding condor job was put on hold.
nodeLabel = '%s - %s' % (stage.DAGNodeName,
'On Hold')
else:
nodeLabel = '%s - %s (%d)' % (stage.DAGNodeName,
stage.JobState,
stage.ExitCode)
if(stage.JobState == 'Exited' and stage.ExitCode != 0):
dot.add_node(pydot.Node(nodeId, shape='ellipse', label=nodeLabel,
style="filled", fillcolor="red"))
else:
dot.add_node(pydot.Node(nodeId, shape='ellipse', label=nodeLabel))
if(nodes.has_key(stage.DAGNodeName)):
nodes[stage.DAGNodeName].append(nodeId)
else:
nodes[stage.DAGNodeName] = [nodeId, ]
# Now add the edges of the graph.
for stage in stages:
if(stage.DAGParentNodeNames):
nodeId = '%d.%d' % (stage.ClusterId, stage.ProcId)
parentNames = stage.DAGParentNodeNames.split(',')
for parentName in parentNames:
if(not nodes.has_key(parentName)):
continue
# We have three cases:
# 1. node.Instances == parent.Instances: 1 to 1
# 2. node.Instances > parent.Instances: scatter
# 3. node.Instances < parent.Instances: gather
# We can treat 2. and 3. the same way. !. is different.
if(len(nodes[stage.DAGNodeName]) == len(nodes[parentName])):
# Case 1.
#
# FIXME: here we assume that ProcIds are the same for parent and child.
#
pClusterId = int(nodes[parentName][0].split('.')[0])
pId = '%d.%d' % (pClusterId, stage.ProcId)
dot.add_edge(pydot.Edge(pId, nodeId))
else:
# Cases 2. and 3.
for parentId in nodes[parentName]:
dot.add_edge(pydot.Edge(parentId, nodeId))
# Create the SVG graph.
# This does a system call, which I would rather avoid.
# rawSvg = dot.create(format='svg')
# This works standalone but not in the web environment... dunno why :-(
# cLength = ctypes.c_int(1)
# cSvg = ctypes.pointer(ctypes.create_string_buffer(1))
# dotString = dot.to_string()
#
# gvc = libgvc.gvContext()
# g = libgraph.agmemread(dotString)
#
# libgvc.gvLayout(gvc, g, "dot")
# libgvc.gvRenderData(gvc, g, "svg",
# ctypes.byref(cSvg), ctypes.byref(cLength))
#
# libgvc.gvFreeLayout(gvc, g)
# libgraph.agclose(g)
# libgvc.gvFreeContext(gvc)
#
# rawSvg = ctypes.string_at(cSvg)
# This works, as long as I convert the unicode to string.
dotString = dot.to_string()
rawSvg = grapher.create(str(dotString), 'dot', 'svg')
# Remove the header.
svg = rawSvg.split('\n')[6:]
# Render the template and exit.
c = Context({'dataset': dataset,
'user': user,
'requestId': requestId,
'svg': '\n'.join(svg)})
return(HttpResponse(t.render(c), mimetype='application/xhtml+xml'))
#!/usr/bin/env python
import grapher
dot = open('bcw.dot').read()
print(grapher.create(dot, "dot", "svg"))
