def write(self, filename, name='dax'):
"""Generate Pegasus abstract workflow (DAX).
Parameters
----------
filename : `str`
File to write the DAX to.
name : `str`, optional
Name of the DAX.
Returns
-------
`Pegasus.ADAG`
Abstract workflow used by Pegasus' planner.
"""
dax = ADAG(name)
# Add files to DAX-level replica catalog.
catalog = {}
for file_id in self.files:
attrs = self.graph.node[file_id]
f = File(attrs['lfn'])
# Add physical file names, if any.
urls = attrs.get('urls')
if urls is not None:
sites = attrs.get('sites')
if sites is None:
sites = ','.join(len(urls) * ['local'])
for url, site in zip(urls.split(','), sites.split(',')):
f.addPFN(PFN(url, site))
catalog[attrs['lfn']] = f
dax.addFile(f)
# Add jobs to the DAX.
for task_id in self.tasks:
attrs = self.graph.node[task_id]
job = Job(name=attrs['name'], id=task_id)
# Add job command line arguments replacing any file name with
# respective Pegasus file object.
args = attrs.get('args')
if args is not None and args:
args = args.split()
lfns = list(set(catalog) & set(args))
if lfns:
indices = [args.index(lfn) for lfn in lfns]
for idx, lfn in zip(indices, lfns):
args[idx] = catalog[lfn]
job.addArguments(*args)
# Specify job's inputs.
inputs = [file_id for file_id in self.graph.predecessors(task_id)]
for file_id in inputs:
attrs = self.graph.node[file_id]
f = catalog[attrs['lfn']]
job.uses(f, link=Link.INPUT)
# Specify job's outputs
outputs = [file_id for file_id in self.graph.successors(task_id)]
for file_id in outputs:
attrs = self.graph.node[file_id]
f = catalog[attrs['lfn']]
job.uses(f, link=Link.OUTPUT)
streams = attrs.get('streams')
if streams is not None:
if streams & 1 != 0:
job.setStdout(f)
if streams & 2 != 0:
job.setStderr(f)
dax.addJob(job)
# Add job dependencies to the DAX.
for task_id in self.tasks:
parents = set()
for file_id in self.graph.predecessors(task_id):
parents.update(self.graph.predecessors(file_id))
for parent_id in parents:
dax.depends(parent=dax.getJob(parent_id),
child=dax.getJob(task_id))
# Finally, write down the workflow in DAX format.
with open(filename, 'w') as f:
dax.writeXML(f)
def write_dax(self, filename='workflow.dax', name='workflow'):
"""Generate Pegasus abstract workflow (DAX).
Parameters
----------
filename : `str`
File to write the DAX to.
name : `str`, optional
Name of the DAX.
Returns
-------
`Pegasus.ADAG`
Abstract workflow used by Pegasus' planner.
Raises
------
`ValueError`
If either task or file node is missing mandatory attribute.
"""
dax = ADAG(name)
# Process file nodes.
for file_id in self.files:
attrs = self.graph.node[file_id]
try:
name = attrs['lfn']
except KeyError:
msg = 'Mandatory attribute "%s" is missing.'
raise AttributeError(msg.format('lfn'))
file_ = File(name)
# Add physical file names, if any.
urls = attrs.get('pfn')
if urls is not None:
urls = urls.split(',')
sites = attrs.get('sites')
if sites is None:
sites = len(urls) * ['condorpool']
for url, site in zip(urls, sites):
file_.addPFN(PFN(url, site))
self.catalog[attrs['lfn']] = file_
# Add jobs to the DAX.
for task_id in self.tasks:
attrs = self.graph.node[task_id]
try:
name = attrs['exec_name']
except KeyError:
msg = 'Mandatory attribute "%s" is missing.'
raise AttributeError(msg.format('exec_name'))
label = '{name}_{id}'.format(name=name, id=task_id)
job = Job(name, id=task_id, node_label=label)
# Add job command line arguments replacing any file name with
# respective Pegasus file object.
args = attrs.get('exec_args', [])
if args:
args = args.split()
lfns = list(set(self.catalog) & set(args))
if lfns:
indices = [args.index(lfn) for lfn in lfns]
for idx, lfn in zip(indices, lfns):
args[idx] = self.catalog[lfn]
job.addArguments(*args)
# Specify job's inputs.
inputs = [file_id for file_id in self.graph.predecessors(task_id)]
for file_id in inputs:
attrs = self.graph.node[file_id]
is_ignored = attrs.get('ignore', False)
if not is_ignored:
file_ = self.catalog[attrs['lfn']]
job.uses(file_, link=Link.INPUT)
# Specify job's outputs
outputs = [file_id for file_id in self.graph.successors(task_id)]
for file_id in outputs:
attrs = self.graph.node[file_id]
is_ignored = attrs.get('ignore', False)
if not is_ignored:
file_ = self.catalog[attrs['lfn']]
job.uses(file_, link=Link.OUTPUT)
streams = attrs.get('streams')
if streams is not None:
if streams & 1 != 0:
job.setStdout(file_)
if streams & 2 != 0:
job.setStderr(file_)
# Provide default files to store stderr and stdout, if not
# specified explicitly.
if job.stderr is None:
file_ = File('{name}.out'.format(name=label))
job.uses(file_, link=Link.OUTPUT)
job.setStderr(file_)
if job.stdout is None:
file_ = File('{name}.err'.format(name=label))
job.uses(file_, link=Link.OUTPUT)
job.setStdout(file_)
dax.addJob(job)
# Add job dependencies to the DAX.
for task_id in self.tasks:
parents = set()
for file_id in self.graph.predecessors(task_id):
parents.update(self.graph.predecessors(file_id))
for parent_id in parents:
dax.depends(parent=dax.getJob(parent_id),
child=dax.getJob(task_id))
# Finally, write down the workflow in DAX format.
with open(filename, 'w') as f:
dax.writeXML(f)
