source: trunk/src/PBSQuery.py @ 161

#
# Authors: Roy Dragseth (roy.dragseth@cc.uit.no) 
#          Bas van der Vlies (basv@sara.nl)
#
# SVN INFO:
#       $Id: PBSQuery.py 161 2008-09-24 13:38:53Z bas $
#
"""
Usage: from PBSQuery import PBSQuery

This class gets the info from the pbs_server via the pbs.py module
for the several batch objects. All get..() functions return an dictionary
with id as key and batch object as value

There are four batch objects:
 - server 
 - queue
 - job
 - node

Each object can be handled as an dictionary and has several member
functions. The second parameter is an python list and can be used if you 
are only interested in certain resources, see example

There are the following functions for PBSQuery:
  job - 
        getjob(job_id, attributes=<default is all>)
        getjobs(attributes=<default is all>)
 
  node -
        getnode(node_id, attributes=<default is all>)
        getnodes(attributes=<default is all>)

  queue -
        getqueue(queue_id, attributes=<default is all>)
        getqueues(attributes=<default is all>)

  server -
        get_serverinfo(attributes=<default is all>)

Here is an example how to use the module:
        from PBSQuery import PBSQuery
        p = PBSQuery()
        nodes = p.getnodes()
        for name,node in nodes.items():
            print name
            if node.is_free():
               print node, node['state']

        l = [ 'state', 'np' ]
        nodes = p.getnodes(l)
        for name,node in nodes.items():
               print node, node['state']

The parameter 'attributes' is an python list of resources that 
you are interested in, eg: only show state of nodes
        l = list()
        l.append('state')
        nodes = p.getnodes(l)
"""
import pbs
import UserDict
import string
import sys

class PBSError(Exception):
        def __init__(self, msg=''):
                self.msg = msg
                Exception.__init__(self, msg)
                
        def __repr__(self):
                return self.msg

        __str__ = __repr__


class PBSQuery:
        def __init__(self, server=None):
                if not server:
                        self.server = pbs.pbs_default()
                else:
                        self.server = server


        def _connect(self):
                """Connect to the PBS/Torque server"""
                self.con = pbs.pbs_connect(self.server)
                if self.con < 0:
                        str = "Could not make an connection with %s\n" %(self.server)
                        raise PBSError(str)

        def _disconnect(self):
                """Close the PBS/Torque connection"""
                pbs.pbs_disconnect(self.con)
                self.attribs = 'NULL'

        def _list_2_attrib(self, list):
                """Convert an python list to an attrib list suitable for pbs"""
                self.attribs = pbs.new_attrl( len(list) )
                i = 0 
                for attrib in list:
                        self.attribs[i].name = attrib
                        i = i + 1

        def _pbsstr_2_list(self, str, delimiter):
                """Convert an string to an python list and use delimiter as spit char"""
                l = sting.splitfields(str, delimiter)
                if len(l) > 1:
                        return l

        def _list_2_dict(self, l, class_func):
                """Convert an pbsstat function list to an class dictionary"""
                self.d = {}
                for item in l:
                        new = class_func()
                        self.d[item.name] = new 
                        
                        for a in item.attribs:
                                new.name = item.name 
                                if a.resource:
                                        new[a.name + '.' + a.resource] = a.value
                                else:
                                        new[a.name] = a.value
                self._free(l)
                
        def _free(self, memory):
                # Not needed any more
                #pbs.pbs_statfree(memory)
                a = 1 

        def _statserver(self, attrib_list=None):
                """Get the server config from the pbs server"""
                if attrib_list:
                        self._list_2_attrib(attrib_list)
                else:
                        self.attribs = 'NULL' 
                        
                self._connect()
                serverinfo = pbs.pbs_statserver(self.con, self.attribs, 'NULL')
                self._disconnect() 
                
                self.serverinfo = {}
                self._list_2_dict(serverinfo, server)

        def get_serverinfo(self, attrib_list=None):
                self._statserver(attrib_list)
                return self.d

        def _statqueue(self, queue_name='', attrib_list=None):
                """Get the queue config from the pbs server"""
                if attrib_list:
                        self._list_2_attrib(attrib_list)
                else:
                        self.attribs = 'NULL' 
                        
                self._connect()
                queues = pbs.pbs_statque(self.con, queue_name, self.attribs, 'NULL')
                self._disconnect() 
                
                self._list_2_dict(queues, queue)

        def getqueue(self, name, attrib_list=None):
                self._statqueue(name, attrib_list)
                q_attrs = self.d['q_express']
                return self.d
        
        def getqueues(self, attrib_list=None):
                self._statqueue('', attrib_list)
                return self.d

        def _statnode(self, node_name='', attrib_list=None):
                """Get the node config from the pbs server"""
                if attrib_list:
                        self._list_2_attrib(attrib_list)
                else:
                        self.attribs = 'NULL' 
                        
                self._connect()
                nodes = pbs.pbs_statnode(self.con, node_name, self.attribs, 'NULL')
                self._disconnect() 
                
                self.nodes = {}
                self._list_2_dict(nodes, node)

        def getnode(self, name, attrib_list=None):
                self._statnode(name, attrib_list)
                return self.d
        
        def getnodes(self, attrib_list=None):
                self._statnode('', attrib_list)
                return self.d

        def _statjob(self, job_name='', attrib_list=None):
                """Get the job config from the pbs server"""
                if attrib_list:
                        self._list_2_attrib(attrib_list)
                else:
                        self.attribs = 'NULL' 
                        
                self._connect()
                jobs = pbs.pbs_statjob(self.con, job_name, self.attribs, 'NULL')
                self._disconnect() 
                
                self.jobs = {}
                self._list_2_dict(jobs, job)

        def getjob(self, name, attrib_list=None):
                self._statjob(name, attrib_list)
                return self.d
        
        def getjobs(self, attrib_list=None):
                self._statjob('', attrib_list)
                return self.d

class _PBSobject(UserDict.UserDict):
        TRUE  = 1
        FALSE = 0

        def __init__(self):
                UserDict.UserDict.__init__(self)
                self.name = None

        def get_value(self, key):
                if self.has_key(key):
                        return self[key]
                else:
                        return None

class job(_PBSobject):
        """PBS job class""" 
        def is_running(self):
                if self.get_value('job_state') == 'Q':
                        return self.FALSE
                else:
                        return self.TRUE 

        def get_nodes(self):
                nodes = self.get_value('exec_host')
                if nodes:
                        l = string.split(nodes,'+')
                        return l
                return list()


class node(_PBSobject):
        """PBS node class"""
        
        def is_free(self):
                """Check if node is free"""
                if self.get_value('state') == 'free':
                        return self.TRUE
                else: 
                        return self.FALSE 

        def has_job(self):
                """Does the node run a job"""
                if self.get_value('jobs'):
                        return self.TRUE
                else:
                        return self.FALSE

class queue(_PBSobject):
        """PBS queue class"""
        def is_enabled(self):
                if self.get_value('enabled') == 'True':
                        return self.TRUE 
                else:
                        return self.FALSE

        def is_execution(self):
                if self.get_value('queue_type') == 'Execution':
                        return self.TRUE 
                else:
                        return self.FALSE

class server(_PBSobject):
        """PBS server class"""

        def get_version(self):
                return self.get_value('pbs_version')

def main():
        p = PBSQuery() 
        serverinfo = p.get_serverinfo()
        for server in serverinfo.keys():
                print server, ' version: ', serverinfo[server].get_version()
        for resource in serverinfo[server].keys():
                print '\t ', resource, ' = ', serverinfo[server][resource]

        queues = p.getqueues()
        for queue in queues.keys():
                print queue
                if queues[queue].is_execution():
                        print '\t ', queues[queue]
                if queues[queue].has_key('acl_groups'):
                        print '\t acl_groups: yes'
                else:
                        print '\t acl_groups: no'

        jobs = p.getjobs()
        for name,job in jobs.items():
                if job.is_running():
                        print job

        l = ['state']
        nodes = p.getnodes(l)
        for name,node in nodes.items():
                if node.is_free(): 
                        print node

if __name__ == "__main__":
        main()