| 1 | #!/usr/bin/python -tti
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| 2 |
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| 3 | # for tab completion
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| 4 | import rlcompleter
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| 5 | import readline
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| 6 | readline.parse_and_bind('tab: complete')
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| 7 |
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| 8 | import sys # for sys.exit() during bebugging mostly :-)
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| 9 | import types # for dynamic class construction
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| 10 | import time # for time.sleep
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| 11 | from pprint import pprint # for nice printing
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| 12 |
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| 13 | from keyword import iskeyword # in case dynamic methods are equal to keywords
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| 14 |
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| 15 | import pydim # for the C-API Dim Call Wrappers
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| 16 |
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| 17 | # using this line makes 'export DIM_DNS_NODE=daq' obsolete
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| 18 | #pydim.dic_set_dns_node('daq')
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| 19 | pydim.dic_set_dns_node('newdaq')
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| 20 |
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| 21 | def print_command( name, f ):
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| 22 | meth_name = name.split('/')[1].lower()
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| 23 | if iskeyword(meth_name):
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| 24 | meth_name += '_cmd'
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| 25 |
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| 26 | if name in dd:
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| 27 | if not dd[name]:
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| 28 | doc_string = "DESC in SERVICE_DESC is empty ?!"
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| 29 | else:
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| 30 | doc_string = dd[name]
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| 31 | else:
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| 32 | doc_string = "-- no DESC found in SERVICE_DESC --"
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| 33 | doc_string += '\n'
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| 34 | doc_string += services[name.split('/')[0]][name][0]
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| 35 |
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| 36 |
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| 37 | # this is the new command, it simply calls the _cmd() method
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| 38 | f.write(" def " + meth_name + "(self, *args):\n" )
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| 39 | f.write(' """ ' + doc_string +'\n' )
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| 40 | f.write(' """ \n')
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| 41 | f.write(' self._cmd("' + meth_name.upper() + '", *args)\n' )
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| 42 |
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| 43 | def print_getter( name, f ):
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| 44 | meth_name = name.split('/')[1].lower()
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| 45 | if iskeyword(meth_name):
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| 46 | meth_name += '_get'
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| 47 |
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| 48 | if name in dd:
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| 49 | if not dd[name]:
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| 50 | doc_string = "DESC in SERVICE_DESC is empty ?!"
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| 51 | else:
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| 52 | doc_string = dd[name]
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| 53 | else:
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| 54 | doc_string = "-- no DESC found in SERVICE_DESC --"
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| 55 | doc_string += '\n'
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| 56 | doc_string += services[name.split('/')[0]][name][0]
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| 57 |
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| 58 |
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| 59 | # this is the new command, it simply calls the _cmd() method
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| 60 | f.write(" def " + meth_name + "(self):\n" )
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| 61 | f.write(' """ ' + doc_string+ '\n')
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| 62 | f.write(' """ \n')
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| 63 | f.write(' return self._get("' + meth_name.upper() + '")\n' )
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| 64 |
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| 65 |
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| 66 |
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| 67 |
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| 68 | class FactDimServer( object ):
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| 69 | def __init__(self, name):
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| 70 | """ sets name of instance to name of server, all uppercase
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| 71 | """
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| 72 | self.list_of_states = []
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| 73 | self.name = name.upper()
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| 74 | self.print_state = False
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| 75 | self.print_msg = False
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| 76 | self.reg_state_cb()
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| 77 | self.reg_msg_cb()
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| 78 | self.user_func = None
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| 79 | self.__delay_between_cmds = 1.0
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| 80 | self.__delay_between_services = 1.0
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| 81 | self.__last_cmd_send = -1*float('inf')
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| 82 | self.__last_service_got = -1*float('inf')
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| 83 |
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| 84 | def _cmd(self, cmdstr, *args):
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| 85 | """ used by all dynamicly created methods, which call a Dim CMD
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| 86 | """
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| 87 | cmdstr=self.name+'/'+cmdstr.upper()
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| 88 | desc = services[self.name][cmdstr.upper()][0]
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| 89 |
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| 90 | # there is a work around for a bug in pydim
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| 91 | # even if a command needs no argument, and desc is also empty string
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| 92 | # one has to give one ... need to tell Niko about it.
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| 93 | if not desc:
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| 94 | desc = 'I'
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| 95 | args=(1,)
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| 96 | elif desc == 'O':
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| 97 | args = (0,)
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| 98 | while not time.time() - self.__last_cmd_send > self.__delay_between_cmds:
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| 99 | time.sleep(0.5)
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| 100 | self.__last_cmd_send = time.time()
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| 101 | pydim.dic_sync_cmnd_service(cmdstr, args, desc, timeout=1)
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| 102 |
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| 103 |
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| 104 |
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| 105 | def _get(self, service):
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| 106 | """ used by all dynamicly created methods, which get a service
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| 107 | """
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| 108 | full_srv_name = self.name+'/'+service.upper()
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| 109 | desc = services[self.name][full_srv_name][0]
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| 110 |
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| 111 | while not time.time() - self.__last_service_got > self.__delay_between_services:
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| 112 | time.sleep(0.5)
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| 113 | self.__last_service_got = time.time()
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| 114 | #print 'full_srv_name',full_srv_name
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| 115 | #print 'desc', desc
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| 116 | return pydim.dic_sync_info_service(full_srv_name, desc, timeout=1)
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| 117 |
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| 118 |
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| 119 |
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| 120 | def __call__(self):
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| 121 | """ Wrapper / For Convenience
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| 122 | self.state() returns a string (if it exists)
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| 123 | *returns* numeric state code, parsed from return of self.state()
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| 124 | """
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| 125 | if hasattr(self, 'stn'):
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| 126 | return self.stn
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| 127 | else:
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| 128 | raise TypeError(self.name+' has no CMD called STATE')
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| 129 |
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| 130 | def wait(self, state_num, timeout=None):
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| 131 | """ waits for a certain state
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| 132 | BLOCKING
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| 133 | returns True if state was reached
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| 134 | returns False if timeout occured
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| 135 | raises TypeError if Server has no method state
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| 136 | """
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| 137 |
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| 138 | if not hasattr(self, 'stn'):
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| 139 | raise TypeError(self.name+' has no CMD called STATE')
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| 140 | if timeout == None:
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| 141 | timeout = float('inf')
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| 142 | else:
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| 143 | timeout = float(timeout)
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| 144 | start = time.time()
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| 145 | while not self.stn == state_num:
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| 146 | time.sleep(0.1)
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| 147 | if time.time() >= start+timeout:
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| 148 | return False
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| 149 | return True
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| 150 |
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| 151 | def state_callback(self, state):
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| 152 | self.sts = state
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| 153 | try:
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| 154 | self.stn = int(state[state.find('[')+1 : state.find(']')])
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| 155 | except ValueError:
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| 156 | self.stn = None
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| 157 |
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| 158 | self.last_st_change = time.time()
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| 159 | self.list_of_states.append( (self.last_st_change, self.stn) )
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| 160 | if len(self.list_of_states) > 10000:
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| 161 | print "list_of_states too long, truncating..."
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| 162 | self.list_of_states = self.list_of_states[1000:]
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| 163 |
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| 164 | if self.user_func:
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| 165 | self.user_func( self.stn )
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| 166 |
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| 167 | if self.print_state:
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| 168 | print state
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| 169 |
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| 170 | def msg_callback(self, msg):
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| 171 | if self.print_msg:
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| 172 | print msg
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| 173 |
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| 174 | def reg_state_cb(self):
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| 175 | if not hasattr(self, 'state'):
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| 176 | raise TypeError(self.name+' has no CMD called STATE')
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| 177 | service_name = self.name.upper()+'/STATE'
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| 178 | self.state_sid = pydim.dic_info_service(service_name, "C", self.state_callback)
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| 179 | if not self.state_sid:
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| 180 | del self.state_sid
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| 181 | raise IOError('could not register STATE client')
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| 182 |
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| 183 | def reg_msg_cb(self):
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| 184 | if not hasattr(self, 'state'):
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| 185 | raise TypeError(self.name+' has no CMD called STATE')
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| 186 | service_name = self.name.upper()+'/MESSAGE'
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| 187 | self.msg_sid = pydim.dic_info_service(service_name, "C", self.msg_callback)
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| 188 | if not self.msg_sid:
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| 189 | del self.msg_sid
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| 190 | raise IOError('could not register MESSAGE client')
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| 191 |
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| 192 | def unreg_state_cb(self):
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| 193 | if hasattr(self, 'state_sid'):
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| 194 | pydim.dic_release_service(self.state_sid)
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| 195 | del self.state_sid
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| 196 |
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| 197 | def unreg_msg_cb(self):
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| 198 | if hasattr(self, 'msg_sid'):
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| 199 | pydim.dic_release_service(self.msg_sid)
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| 200 | del self.msg_sid
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| 201 |
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| 202 | def __del__(self):
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| 203 | self.unreg_state_cb()
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| 204 | self.unreg_msg_cb()
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| 205 |
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| 206 |
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| 207 |
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| 208 | # In order to create classes according to the Dim-Servers, currently connected
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| 209 | # to the DIS_DNS I have to parse DIS_DNS/SERVER_LIST
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| 210 | # This is done in two steps, first I get the list of Server Names from DIS_DNS
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| 211 | # and the I get the list of each servers services and cmds,
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| 212 | # from each servers SERVICE_LIST and the service/command description
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| 213 | # from each servers SERVICE_DESC
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| 214 | # I get quite a lot of information, which I store in python dicts, or
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| 215 | # even nested dicts, if necessary.
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| 216 | def ParseDnsServerList( timeout = 5):
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| 217 | """ requests DIS_DNS/SERVER_LSIT and creates dict *servers* from it,
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| 218 | which is returned as well.
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| 219 |
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| 220 | the returned dict contains:
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| 221 | { "SERVER_NAME": (pid_of_server_process, host_the_server_runs_on) }
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| 222 |
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| 223 | the SERVER_NAME seems to be in capital letter all the time, but I'm
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| 224 | not sure if this is really ensured by Dim or if this was ensured by
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| 225 | Thomas manually. So maybe one should not rely on this.
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| 226 |
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| 227 | In case the request of DIS_DNS/SERVER_LIST times out, no Exception
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| 228 | is thrown, but the program exits. This is probably bullshit.
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| 229 | """
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| 230 | # making server list
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| 231 | rawlist = pydim.dic_sync_info_service('DIS_DNS/SERVER_LIST','C', timeout=5)
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| 232 | if rawlist == None:
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| 233 | ## todo: throw an exception here!
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| 234 | print "couldn't get the server list of DIS_DNS. program abortion..."
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| 235 | sys.exit(1)
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| 236 | #print rawlist
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| 237 | # the output needs to be treated a bit .. it is a tuple with only one long string in it
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| 238 | # the string contains | and the strange character \x00 (ascii-zero)
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| 239 | # I use both to cut the list apart
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| 240 | rawlist = rawlist[0].split('\x00')
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| 241 | servers_n_hosts = rawlist[0].split('|')
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| 242 | server_ids = rawlist[1].split('|')
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| 243 |
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| 244 | servers = {}
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| 245 | for i,snh in enumerate(servers_n_hosts):
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| 246 | snh = snh.split('@')
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| 247 | s = snh[0]
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| 248 | h = snh[1]
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| 249 | sid = server_ids[i]
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| 250 | servers[s] = (sid, h)
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| 251 |
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| 252 | return servers
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| 253 |
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| 254 |
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| 255 |
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| 256 | # servers should be a dict containing uppercase server names as keys,
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| 257 | # the dict-values are not needed, so it might be any iteratable python listlike type
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| 258 | # to be precise
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| 259 | def ParseServersServiceList( servers ):
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| 260 | """ this function parses SERVER_NAME/SERVICE_LIST as well as
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| 261 | SERVER_NAME/SERVICE_DESC of all SERVER_NAME in the input list-like *servers*
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| 262 |
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| 263 | two dicts are returned:
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| 264 | *services* - nested dict:
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| 265 | { "SERVER_NAME" : { "SERVER_NAME/SERVICE_NAME" : (
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| 266 | "format-description-string like: I:2;C",
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| 267 | "" or "CMP" or "RPC",
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| 268 | "service description text" ) } }
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| 269 |
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| 270 | *dd* - normal dict:
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| 271 | { "SERVER_NAME/SERVICE_NAME" : "service description text" }
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| 272 |
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| 273 | """
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| 274 |
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| 275 | services = {}
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| 276 | dd = {}
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| 277 | for server in servers:
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| 278 | # sl_raw is a tuple, with one really long string, which needs to be parsed
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| 279 | sl_raw = pydim.dic_sync_info_service(server+'/SERVICE_LIST','C',timeout=3)[0]
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| 280 | if sl_raw == None:
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| 281 | print "couldn't get the service list of ", server, "program abortion..."
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| 282 | sys.exit(1)
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| 283 | # print server
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| 284 | # print sl_raw
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| 285 | # even without parsing, I can find out, if this server also gives me a
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| 286 | # service description list. In case it does not, this is fine as well
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| 287 | # the doc string of the dynamicly created methods, will then contain
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| 288 | # a note, that therer was no SERVICE_DESC ...
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| 289 | if server+'/SERVICE_DESC' in sl_raw:
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| 290 | sd_raw = pydim.dic_sync_info_service(server+'/SERVICE_DESC','C',timeout=3)[0]
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| 291 | if sd_raw == None:
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| 292 | print "couldn't get the service description list of ", server, "program abortion..."
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| 293 | sys.exit(1)
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| 294 | else:
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| 295 | sd_raw = ''
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| 296 |
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| 297 | # now before parsing, I strip off all ASCII zeroes '\x00' and all
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| 298 | # line breaks off the *end* of the long string of both
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| 299 | # the service list sl
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| 300 | # and service description sd
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| 301 | #
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| 302 | # I think in sl_raw were alse some '\x00' in the middle .. these
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| 303 | # are replaced by nothing, in case they are there.
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| 304 | sl_raw = sl_raw.rstrip('\x00\n')
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| 305 | sl_raw = sl_raw.replace('\x00','')
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| 306 | sd_raw = sd_raw.rstrip('\x00\n')
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| 307 |
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| 308 | # The lists are seperated by line breaks, so I split them using this
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| 309 | sl = sl_raw.split('\n')
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| 310 | sd = sd_raw.split('\n')
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| 311 |
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| 312 | # First I parse the service descriptons, so I have them available,
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| 313 | # when I create the dict full of services.
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| 314 | # All desciptions look like this
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| 315 | # 'SERVER/SERVICE=some descriptive text' or
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| 316 | # 'SERVER/SERVICE='
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| 317 | # this I use to create the dictionary.
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| 318 | # create descripton dict dd from service_desc list sd
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| 319 | for d_str in sd:
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| 320 | service,equalsign,desc = d_str.partition('=')
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| 321 | if not '/' in service:
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| 322 | service = server+'/'+service
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| 323 | #if '=' != equalsign:
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| 324 | # print "Error: server:", server, "desc:", d_str
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| 325 | dd[service] = desc
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| 326 |
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| 327 | # Now I fill ther services dict. Each server gets a nested dict
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| 328 | # inside services.
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| 329 | # Each service is explained in a string with a '|' in between.
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| 330 | # I use this for spliting.
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| 331 | # The string look like this
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| 332 | # SERVER/SERVICE|format-desc-str(e.g. I:2;C)|-empty- or CMD or RPC|
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| 333 | services[server] = {}
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| 334 | for service in sl:
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| 335 | service = service.split('|')
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| 336 | if service[0] in dd:
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| 337 | services[server][service[0]] = (
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| 338 | service[1], service[2], dd[service[0]])
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| 339 | return services, dd
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| 340 |
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| 341 |
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| 342 |
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| 343 | if __name__ == '__main__':
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| 344 |
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| 345 | print 'requesting and parsing DIM DNS server list'
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| 346 | servers = ParseDnsServerList()
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| 347 | print '... parsing each servers service list'
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| 348 | services, dd = ParseServersServiceList( servers )
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| 349 |
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| 350 | # since I want this text to created for reference
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| 351 | # I will create it here
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| 352 | print "creating fix class definitions in a file:"
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| 353 | f = open("fact_dim_servers.py", "w")
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| 354 | f.write("from make_fix_dimservers import FactDimServer\n")
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| 355 |
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| 356 | for server_name in servers:
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| 357 |
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| 358 | if server_name == "DIS_DNS":
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| 359 | continue
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| 360 |
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| 361 | f.write("class "+server_name+" ( FactDimServer): \n")
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| 362 |
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| 363 | for cmd in services[server_name]:
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| 364 | cmdname = cmd.split('/')
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| 365 | if len(cmdname) > 1:
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| 366 | cmdname = cmdname[1]
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| 367 | elif len(cmdname) >0:
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| 368 | cmdname = cmdname[0]
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| 369 | cmd = server_name+'/'+cmdname
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| 370 | else:
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| 371 | print server_name, cmd
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| 372 | raise ValueError('was not able to parse service/command names')
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| 373 | if 'CMD' in services[server_name][cmd][1]:
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| 374 | print_command(cmd, f)
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| 375 | elif not services[server_name][cmd][1]:
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| 376 | print_getter(cmd, f)
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| 377 |
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| 378 |
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| 379 | f.close()
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| 380 |
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| 381 | import fact_dim_servers
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| 382 |
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| 383 | # create an instace of each of the classes
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| 384 | # and make it globally known, i.e. known to the Python interpreter
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| 385 | # all the ServerClass instances are collected in a list
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| 386 | # so one can get a quick overview --> print dims
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| 387 | print 'creating an instance of each FACT DIM server'
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| 388 |
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| 389 | dims = []
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| 390 | new_instance = None
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| 391 | for server_name in servers:
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| 392 | if server_name == 'DIS_DNS':
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| 393 | continue
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| 394 | new_instance = getattr(sys.modules["fact_dim_servers"], server_name)(server_name, services)
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| 395 | dims.append( new_instance )
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| 396 | globals()[server_name.lower()] = new_instance
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| 397 | del new_instance
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| 398 |
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| 399 | print '.... fact DIM servers are ready to use'
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| 400 | print '-'*70
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| 401 | print
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| 402 |
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