| 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 |
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| 20 | class FactDimServer( object ):
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| 21 | def __init__(self, name):
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| 22 | """ sets name of instance to name of server, all uppercase
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| 23 | """
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| 24 | self.list_of_states = []
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| 25 | self.name = name.upper()
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| 26 | self.print_state = False
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| 27 | self.print_msg = False
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| 28 | self.reg_state_cb()
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| 29 | self.reg_msg_cb()
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| 30 | self.user_func = None
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| 31 | self.__delay_between_cmds = 1.0
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| 32 | self.__delay_between_services = 1.0
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| 33 | self.__last_cmd_send = -1*float('inf')
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| 34 | self.__last_service_got = -1*float('inf')
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| 35 |
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| 36 | def _cmd(self, cmdstr, *args):
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| 37 | """ used by all dynamicly created methods, which call a Dim CMD
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| 38 | """
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| 39 | cmdstr=self.name+'/'+cmdstr.upper()
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| 40 | desc = services[self.name][cmdstr.upper()][0]
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| 41 |
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| 42 | # there is a work around for a bug in pydim
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| 43 | # even if a command needs no argument, and desc is also empty string
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| 44 | # one has to give one ... need to tell Niko about it.
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| 45 | if not desc:
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| 46 | desc = 'I'
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| 47 | args=(1,)
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| 48 | elif desc == 'O':
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| 49 | args = (0,)
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| 50 | while not time.time() - self.__last_cmd_send > self.__delay_between_cmds:
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| 51 | time.sleep(0.5)
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| 52 | self.__last_cmd_send = time.time()
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| 53 | pydim.dic_sync_cmnd_service(cmdstr, args, desc, timeout=1)
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| 54 |
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| 55 |
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| 56 |
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| 57 | def _get(self, service):
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| 58 | """ used by all dynamicly created methods, which get a service
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| 59 | """
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| 60 | full_srv_name = self.name+'/'+service.upper()
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| 61 | desc = services[self.name][full_srv_name][0]
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| 62 |
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| 63 | while not time.time() - self.__last_service_got > self.__delay_between_services:
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| 64 | time.sleep(0.5)
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| 65 | self.__last_service_got = time.time()
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| 66 | #print 'full_srv_name',full_srv_name
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| 67 | #print 'desc', desc
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| 68 | return pydim.dic_sync_info_service(full_srv_name, desc, timeout=1)
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| 69 |
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| 70 |
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| 71 |
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| 72 | def __call__(self):
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| 73 | """ Wrapper / For Convenience
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| 74 | self.state() returns a string (if it exists)
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| 75 | *returns* numeric state code, parsed from return of self.state()
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| 76 | """
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| 77 | if hasattr(self, 'stn'):
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| 78 | return self.stn
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| 79 | else:
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| 80 | raise TypeError(self.name+' has no CMD called STATE')
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| 81 |
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| 82 | def wait(self, state_num, timeout=None):
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| 83 | """ waits for a certain state
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| 84 | BLOCKING
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| 85 | returns True if state was reached
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| 86 | returns False if timeout occured
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| 87 | raises TypeError if Server has no method state
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| 88 | """
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| 89 |
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| 90 | if not hasattr(self, 'stn'):
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| 91 | raise TypeError(self.name+' has no CMD called STATE')
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| 92 | if timeout == None:
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| 93 | timeout = float('inf')
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| 94 | else:
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| 95 | timeout = float(timeout)
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| 96 | start = time.time()
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| 97 | while not self.stn == state_num:
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| 98 | time.sleep(0.1)
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| 99 | if time.time() >= start+timeout:
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| 100 | return False
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| 101 | return True
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| 102 |
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| 103 | def state_callback(self, state):
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| 104 | self.sts = state
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| 105 | try:
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| 106 | self.stn = int(state[state.find('[')+1 : state.find(']')])
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| 107 | except ValueError:
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| 108 | self.stn = None
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| 109 |
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| 110 | self.last_st_change = time.time()
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| 111 | self.list_of_states.append( (self.last_st_change, self.stn) )
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| 112 | if len(self.list_of_states) > 10000:
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| 113 | print "list_of_states too long, truncating..."
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| 114 | self.list_of_states = self.list_of_states[1000:]
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| 115 |
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| 116 | if self.user_func:
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| 117 | self.user_func( self.stn )
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| 118 |
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| 119 | if self.print_state:
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| 120 | print state
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| 121 |
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| 122 | def msg_callback(self, msg):
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| 123 | if self.print_msg:
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| 124 | print msg
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| 125 |
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| 126 | def reg_state_cb(self):
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| 127 | if not hasattr(self, 'state'):
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| 128 | raise TypeError(self.name+' has no CMD called STATE')
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| 129 | service_name = self.name.upper()+'/STATE'
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| 130 | self.state_sid = pydim.dic_info_service(service_name, "C", self.state_callback)
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| 131 | if not self.state_sid:
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| 132 | del self.state_sid
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| 133 | raise IOError('could not register STATE client')
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| 134 |
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| 135 | def reg_msg_cb(self):
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| 136 | if not hasattr(self, 'state'):
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| 137 | raise TypeError(self.name+' has no CMD called STATE')
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| 138 | service_name = self.name.upper()+'/MESSAGE'
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| 139 | self.msg_sid = pydim.dic_info_service(service_name, "C", self.msg_callback)
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| 140 | if not self.msg_sid:
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| 141 | del self.msg_sid
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| 142 | raise IOError('could not register MESSAGE client')
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| 143 |
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| 144 | def unreg_state_cb(self):
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| 145 | if hasattr(self, 'state_sid'):
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| 146 | pydim.dic_release_service(self.state_sid)
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| 147 | del self.state_sid
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| 148 |
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| 149 | def unreg_msg_cb(self):
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| 150 | if hasattr(self, 'msg_sid'):
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| 151 | pydim.dic_release_service(self.msg_sid)
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| 152 | del self.msg_sid
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| 153 |
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| 154 | def __del__(self):
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| 155 | self.unreg_state_cb()
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| 156 | self.unreg_msg_cb()
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| 157 |
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| 158 | # utility functions for dynamic addid of methods to classes
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| 159 | def add_command(cls, name):
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| 160 | meth_name = name.split('/')[1].lower()
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| 161 | if iskeyword(meth_name):
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| 162 | meth_name += '_cmd'
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| 163 |
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| 164 | # this is the new command, it simple calls the _cmd() method
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| 165 | def new_command(self, *args):
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| 166 | self._cmd(meth_name, *args)
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| 167 |
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| 168 | new_command.__name__ = meth_name
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| 169 |
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| 170 | # from this line on, the docstring of the method is created
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| 171 | if name in dd:
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| 172 | if not dd[name]:
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| 173 | new_command.__doc__ = "DESC in SERVICE_DESC is empty ?!"
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| 174 | else:
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| 175 | new_command.__doc__ = dd[name]
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| 176 | else:
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| 177 | new_command.__doc__ = "-- no DESC found in SERVICE_DESC --"
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| 178 | new_command.__doc__ += '\n'
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| 179 | new_command.__doc__ += services[name.split('/')[0]][name][0]
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| 180 |
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| 181 | # this line make the new_command() method, a method of the class cls
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| 182 | # giving it the name new_command.__name__
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| 183 | setattr( cls, new_command.__name__, new_command)
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| 184 |
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| 185 | # add_getter is very similar to add_command,
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| 186 | # the only difference is, that it calls _get() instead of _cmd()
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| 187 | # and since _get() has a return value, this return value is vorwarded to the user
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| 188 | def add_getter(cls, name):
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| 189 | meth_name = name.split('/')
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| 190 | if len(meth_name) > 1:
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| 191 | meth_name = meth_name[1].lower()
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| 192 | elif len(meth_name) >0:
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| 193 | meth_name = meth_name[0].lower()
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| 194 | else:
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| 195 | print 'add_getter, cannot parse name:', name
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| 196 | raise ValueError('read above')
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| 197 | if iskeyword(meth_name):
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| 198 | meth_name += '_cmd'
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| 199 | def new_command(self):
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| 200 | return self._get(meth_name)
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| 201 | new_command.__name__ = meth_name
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| 202 | if name in dd:
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| 203 | if not dd[name]:
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| 204 | new_command.__doc__ = "DESC in SERVICE_DESC is empty ?!"
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| 205 | else:
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| 206 | new_command.__doc__ = dd[name]
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| 207 | else:
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| 208 | new_command.__doc__ = "-- no DESC found in SERVICE_DESC --"
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| 209 | new_command.__doc__ += '\n'
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| 210 | new_command.__doc__ += services[name.split('/')[0]][name][0]
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| 211 | setattr( cls, new_command.__name__, new_command)
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| 212 |
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| 213 |
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| 214 |
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| 215 |
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| 216 |
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| 217 | # In order to create classes according to the Dim-Servers, currently connected
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| 218 | # to the DIS_DNS I have to parse DIS_DNS/SERVER_LIST
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| 219 | # This is done in two steps, first I get the list of Server Names from DIS_DNS
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| 220 | # and the I get the list of each servers services and cmds,
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| 221 | # from each servers SERVICE_LIST and the service/command description
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| 222 | # from each servers SERVICE_DESC
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| 223 | # I get quite a lot of information, which I store in python dicts, or
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| 224 | # even nested dicts, if necessary.
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| 225 |
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| 226 | def ParseDnsServerList():
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| 227 | # making server list
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| 228 | rawlist = pydim.dic_sync_info_service('DIS_DNS/SERVER_LIST','C', timeout=5)
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| 229 | if rawlist == None:
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| 230 | print "couldn't get the server list of DIS_DNS. program abortion..."
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| 231 | sys.exit(1)
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| 232 | #print rawlist
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| 233 | # the output needs to be treated a bit .. it is a tuple with only one long string in it
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| 234 | # the string contains | and the strange character \x00
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| 235 | # I use both to cut the list apart
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| 236 | rawlist = rawlist[0].split('\x00')
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| 237 | servers_n_hosts = rawlist[0].split('|')
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| 238 | server_ids = rawlist[1].split('|')
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| 239 |
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| 240 | servers = {}
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| 241 | for i,snh in enumerate(servers_n_hosts):
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| 242 | snh = snh.split('@')
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| 243 | s = snh[0]
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| 244 | h = snh[1]
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| 245 | sid = server_ids[i]
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| 246 | servers[s] = (sid, h)
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| 247 |
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| 248 | return servers
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| 249 |
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| 250 |
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| 251 |
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| 252 | # servers should be a dict containing uppercase server names as keys,
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| 253 | # the values are not needed, so it might be any iteratable python listlike type
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| 254 | # to be precise
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| 255 | def ParseServersServiceList( servers ):
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| 256 |
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| 257 | services = {}
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| 258 | dd = {}
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| 259 | for server in servers:
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| 260 | # sl_raw is a tuple, with an really long string, which needs to be parsed
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| 261 | sl_raw = pydim.dic_sync_info_service(server+'/SERVICE_LIST','C',timeout=3)[0]
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| 262 | if sl_raw == None:
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| 263 | print "couldn't get the service list of ", server, "program abortion..."
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| 264 | sys.exit(1)
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| 265 | # print server
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| 266 | # print sl_raw
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| 267 | # even without parsing, I can find out, if this server also gives me a
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| 268 | # service description list. In case it does not, this is fine as well
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| 269 | # the doc string of the dynamicly created methods, will then contain
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| 270 | # a note, that therer was no SERVICE_DESC ...
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| 271 | if server+'/SERVICE_DESC' in sl_raw:
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| 272 | sd_raw = pydim.dic_sync_info_service(server+'/SERVICE_DESC','C',timeout=3)[0]
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| 273 | if sd_raw == None:
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| 274 | print "couldn't get the service description list of ", server, "program abortion..."
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| 275 | sys.exit(1)
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| 276 | else:
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| 277 | sd_raw = ''
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| 278 |
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| 279 | # now before parsing, I strip off all ASCII zeroes '\x00' and all
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| 280 | # line breaks off the *end* of the long string of both
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| 281 | # the service list sl
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| 282 | # and service description sd
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| 283 | #
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| 284 | # I think in sl_raw were alse some '\x00' in the middle .. these
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| 285 | # are replaced by nothing, in case they are there.
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| 286 | sl_raw = sl_raw.rstrip('\x00\n')
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| 287 | sl_raw = sl_raw.replace('\x00','')
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| 288 | sd_raw = sd_raw.rstrip('\x00\n')
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| 289 |
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| 290 | # The lists are seperated by line breaks, so I split them using this
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| 291 | sl = sl_raw.split('\n')
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| 292 | sd = sd_raw.split('\n')
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| 293 |
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| 294 | # First I parse the service descriptons, so I have them available,
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| 295 | # when I create the dict full of services.
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| 296 | # All desciptions look like this
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| 297 | # 'SERVER/SERVICE=some descriptive text' or
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| 298 | # 'SERVER/SERVICE='
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| 299 | # this I use to create the dictionary.
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| 300 | # create descripton dict dd from service_desc list sd
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| 301 | for d_str in sd:
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| 302 | service,equalsign,desc = d_str.partition('=')
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| 303 | if not '/' in service:
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| 304 | service = server+'/'+service
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| 305 | #if '=' != equalsign:
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| 306 | # print "Error: server:", server, "desc:", d_str
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| 307 | dd[service] = desc
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| 308 |
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| 309 | # Now I fill ther services dict. Each server gets a nested dict
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| 310 | # inside services.
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| 311 | # Each service is explained in a string with a '|' in between.
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| 312 | # I use this for spliting.
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| 313 | # The string look like this
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| 314 | # SERVER/SERVICE|format-desc-str(e.g. I:2;C)|-empty- or CMD or RPC|
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| 315 | services[server] = {}
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| 316 | for service in sl:
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| 317 | service = service.split('|')
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| 318 | if service[0] in dd:
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| 319 | services[server][service[0]] = (
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| 320 | service[1], service[2], dd[service[0]])
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| 321 | return services, dd
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| 322 |
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| 323 | print 'requesting and parsing DIM DNS server list'
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| 324 | servers = ParseDnsServerList()
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| 325 | print '... parsing each servers service list'
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| 326 | services, dd = ParseServersServiceList( servers )
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| 327 |
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| 328 | print 'creating classes'
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| 329 | # create one class for each Fact Dim Server
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| 330 | FactDimServerClasses = []
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| 331 | for server_name in servers:
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| 332 | FactDimServerClasses.append(
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| 333 | types.ClassType( server_name, (FactDimServer,), {}) )
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| 334 | for cmd in services[server_name]:
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| 335 | cmdname = cmd.split('/')
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| 336 | if len(cmdname) > 1:
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| 337 | cmdname = cmdname[1]
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| 338 | elif len(cmdname) >0:
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| 339 | cmdname = cmdname[0]
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| 340 | cmd = server_name+'/'+cmdname
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| 341 | else:
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| 342 | print server_name, cmd
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| 343 | raise ValueError('was not able to parse service/command names')
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| 344 | if 'CMD' in services[server_name][cmd][1]:
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| 345 | add_command(FactDimServerClasses[-1], cmd)
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| 346 | elif not services[server_name][cmd][1]:
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| 347 | add_getter(FactDimServerClasses[-1], cmd)
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| 348 |
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| 349 |
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| 350 |
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| 351 | # create an instace of each of the classes
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| 352 | # and make it globally known, i.e. known to the Python interpreter
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| 353 | # all the ServerClass instances are collected in a list
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| 354 | # so one can get a quick overview --> print dims
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| 355 | print 'creating an instance of each FACT DIM server'
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| 356 |
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| 357 | dims = []
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| 358 | new_instance = None
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| 359 | for i,server_name in enumerate(servers):
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| 360 | if server_name == 'DIS_DNS':
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| 361 | continue
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| 362 | new_instance = FactDimServerClasses[i](server_name)
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| 363 | dims.append( new_instance )
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| 364 | globals()[server_name.lower()] = new_instance
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| 365 | del new_instance
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| 366 | del i
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| 367 |
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| 368 | print '.... fact DIM servers are ready to use'
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| 369 | print '-'*70
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| 370 | print
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| 371 | ##############################################################################
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| 372 | # class for colored printing
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| 373 |
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| 374 | class bcolors:
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| 375 | HEADER = '\033[95m'
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| 376 | OKBLUE = '\033[94m'
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| 377 | OKGREEN = '\033[92m'
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| 378 | WARNING = '\033[93m'
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| 379 | FAIL = '\033[91m'
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| 380 | ENDC = '\033[0m'
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| 381 |
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| 382 | def disable(self):
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| 383 | self.HEADER = ''
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| 384 | self.OKBLUE = ''
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| 385 | self.OKGREEN = ''
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| 386 | self.WARNING = ''
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| 387 | self.FAIL = ''
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| 388 | self.ENDC = ''
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| 389 |
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| 390 | ##############################################################################
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| 391 | # class which implements colored printing
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| 392 | # method calls can be used instead of Python print calls
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| 393 | # for conveniently printing colored output.
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| 394 |
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| 395 |
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| 396 | class MSG( bcolors):
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| 397 | def __init__(self, verbose = True):
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| 398 | """ create MSG instance,
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| 399 | default is verbose,
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| 400 | sets self.output
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| 401 |
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| 402 | if:
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| 403 | self.*output* = True, object behaves as expeted
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| 404 | if False, no call return anything
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| 405 | """
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| 406 | self.output = verbose
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| 407 |
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| 408 | def fail(self, text ):
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| 409 | """ print in RED
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| 410 | """
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| 411 | text = str(text)
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| 412 | if self.output:
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| 413 | print bcolors.FAIL + "ERROR:" + bcolors.ENDC,
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| 414 | print bcolors.FAIL + text + bcolors.ENDC
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| 415 |
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| 416 | def warn(self, text ):
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| 417 | """ print in YELLOW
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| 418 | """
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| 419 | text = str(text)
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| 420 | if self.output:
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| 421 | print bcolors.WARNING + text + bcolors.ENDC
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| 422 |
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| 423 | def ok(self, text ):
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| 424 | """ print in GREEN
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| 425 | """
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| 426 | text = str(text)
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| 427 | if self.output:
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| 428 | print bcolors.OKGREEN + text + bcolors.ENDC
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| 429 |
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| 430 | def __call__(self, *args):
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| 431 | """ print as Python print would do
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| 432 | """
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| 433 | if self.output:
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| 434 | for arg in args:
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| 435 | print arg,
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| 436 | print
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| 437 |
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