| commit | author | age | ||
| 4db06c | 1 | #!/usr/bin/python3 |
| SP | 2 | import requests |
| 3 | import json | |
| 4 | from time import sleep | |
| 5 | import uuid | |
| 6 | import subprocess | |
| 7 | import os | |
| 8 | import shutil | |
| 9 | import signal | |
| 10 | import sys | |
| 11 | import socket | |
| 12 | from threading import Thread, Event | |
| 13 | ||
| 14 | def get_hostname(): | |
| 15 | return socket.gethostname() | |
| 16 | ||
| 17 | def get_ip(): | |
| 18 | return ((([ip for ip in socket.gethostbyname_ex(socket.gethostname())[2] if not ip.startswith("127.")] or [[(s.connect(("8.8.8.8", 53)), s.getsockname()[0], s.close()) for s in [socket.socket(socket.AF_INET, socket.SOCK_DGRAM)]][0][1]]) + ["no IP found"])[0]) | |
| 19 | ||
| 20 | def get_client_id(addr, my_ip, my_hostname): | |
| 21 | client_auth={'ip':my_ip,'hostname':my_hostname} | |
| 22 | response=requests.post(addr+"/api/register/", data=client_auth) | |
| 23 | if(response.status_code==200): | |
| 24 | client_data=json.loads(response.text) | |
| 25 | client_id=client_data['id'] | |
| 26 | return client_id | |
| 27 | else: | |
| 28 | raise ValueError | |
| 29 | ||
| 30 | ||
| 31 | def get_run(addr,cid): | |
| 32 | response=requests.get(addr+"/api/getrun/"+str(cid)+"/") | |
| 33 | if(response.status_code==200): | |
| 34 | client_data=json.loads(response.text) | |
| 35 | rid=client_data['id'] | |
| 36 | tape=client_data['tape'] | |
| 37 | vtu=client_data['lastVTU'] | |
| 38 | status=client_data['status'] | |
| 39 | return (rid,tape,vtu,status) | |
| 40 | else: | |
| 41 | print(response.text) | |
| 42 | raise ValueError | |
| 43 | ||
| 44 | ||
| 45 | def ping_run(addr,cid, rid): | |
| 46 | client_data={'client_id':cid, 'run_id':rid} | |
| 47 | response=requests.post(addr+"/api/ping/", data=client_data) | |
| 48 | if(response.status_code==200): | |
| 49 | return | |
| 50 | else: | |
| 51 | raise ValueError | |
| 52 | ||
| 53 | def send_error_report(addr,cid, rid,errcode): | |
| 54 | client_data={'client_id':cid, 'run_id':rid, 'error_code':errcode} | |
| 55 | response=requests.post(addr+"/api/reporterr/", data=client_data) | |
| 56 | if(response.status_code==200): | |
| 57 | return | |
| 58 | else: | |
| 59 | raise ValueError | |
| 60 | ||
| 61 | def upload(addr,cid, rid, vtu, status): | |
| 62 | client_data={'client_id': cid, 'run_id': rid, 'lastVTU': vtu, 'status': status} | |
| 63 | response=requests.post(addr+"/api/upload/", data=client_data) | |
| 64 | if(response.status_code==200): | |
| 65 | return | |
| 66 | else: | |
| 67 | raise ValueError | |
| 68 | ||
| 69 | def getNewVTU(directory): | |
| 70 | fset=set() | |
| 71 | for file in os.listdir(directory): | |
| 72 | if file.endswith(".vtu") and file.startswith("timestep_"): | |
| 73 | fset.add(file) | |
| 74 | return fset | |
| 75 | ||
| 76 | ||
| 77 | def removeDir(directory): | |
| 78 | os.chdir('/') | |
| 79 | try: | |
| 80 | shutil.rmtree(directory) | |
| 81 | except: | |
| 82 | print("Cannot remove directory "+directory+ "\n") | |
| 83 | return | |
| 84 | ||
| 85 | ||
| 86 | ||
| 87 | ||
| 88 | class ClientThread(Thread): | |
| 89 | ||
| 90 | def __init__(self,conn_address='http://localhost:8000',subid=0, update_seconds=100): | |
| 91 | super(ClientThread,self).__init__() | |
| 92 | self._stop_event = Event() | |
| 93 | self._stop_event.clear() | |
| 94 | self.p=None | |
| 95 | self.workingdir=None | |
| 96 | self.conn_address=conn_address | |
| 97 | self.id=subid | |
| 98 | self.ip=get_ip() | |
| 99 | self.hostname=get_hostname() | |
| eccf3a | 100 | self.update_seconds=update_second |
| SP | 101 | # self.subthreads=[] |
| 4db06c | 102 | |
| SP | 103 | def stop(self): |
| 104 | self._stop_event.set() | |
| 105 | ||
| 106 | def isStopped(self): | |
| 107 | return self._stop_event.is_set() | |
| 108 | ||
| 109 | def join(self): | |
| 110 | print('joining threads') | |
| 111 | super(ClientThread, self).join() | |
| 112 | if self.p is not None: | |
| 113 | self.p.terminate() | |
| 114 | if self.workingdir is not None: | |
| 115 | removeDir(self.workingdir.fullpath()) | |
| 116 | ||
| 117 | ||
| 118 | def sleep(self,s): | |
| 119 | for i in range(0, s): | |
| 120 | if(self.isStopped()): | |
| 121 | return False | |
| 122 | sleep(1) | |
| 123 | return True | |
| 124 | ||
| 125 | def run(self): | |
| 126 | while(not self.isStopped()): | |
| 127 | try: | |
| 128 | cid=get_client_id(self.conn_address, self.ip, self.hostname) | |
| 129 | except: | |
| 130 | print("[{}] Could not get CID.".format(self.id)) | |
| 131 | self.sleep(10) | |
| 132 | continue | |
| 133 | #print("Got CID. getting RID.") | |
| 134 | while(not self.isStopped()): | |
| 135 | try: | |
| 136 | (rid,tape,vtu,status)=get_run(self.conn_address,cid) | |
| 137 | except: | |
| 138 | print("[{}] Could not get RID.".format(self.id)) | |
| 139 | self.sleep(10) | |
| 140 | break | |
| 141 | else: | |
| 142 | #start separate thread with simulations. | |
| 143 | self.workingdir=Directory('/tmp/ts_'+str(uuid.uuid4())) | |
| 144 | self.workingdir.makeifnotexist() | |
| 145 | self.workingdir.goto() | |
| 146 | with open(self.workingdir.fullpath()+"/tape", 'w') as f: | |
| 147 | f.write(tape) | |
| 148 | if(int(status)==-1): | |
| 149 | cmd=['trisurf', '--force-from-tape'] | |
| 150 | print("[{}] Run id={} :: Starting from tape.".format(self.id, rid)) | |
| 151 | else: | |
| 152 | with open(self.workingdir.fullpath()+"/.status",'w') as f: | |
| 153 | f.write(status) | |
| 154 | with open(self.workingdir.fullpath()+"/initial.vtu",'w') as f: | |
| 155 | f.write(vtu) | |
| 156 | cmd=['trisurf', '--restore-from-vtk', 'initial.vtu'] | |
| 157 | print("[{}] Run id={} :: Restoring from vtk, last timestep {}".format(self.id,rid,status)) | |
| 158 | self.p=subprocess.Popen(cmd, stdout=subprocess.DEVNULL) | |
| 159 | s=int(status) | |
| 160 | while(not self.isStopped()): | |
| 161 | #monitor for new file. If file is present, upload it! | |
| 162 | newVTU=getNewVTU(self.workingdir.fullpath()) | |
| 163 | if newVTU: #upload | |
| 164 | try: | |
| 165 | for nv in sorted(newVTU): | |
| 166 | with open(nv,'r') as f: | |
| 167 | fc=f.read() | |
| 168 | s=s+1 | |
| 169 | print('[{}] Uploading {}.'.format(self.id,nv)) | |
| 170 | upload(self.conn_address, cid, rid, fc, s) | |
| 171 | os.unlink(nv) | |
| 172 | except: | |
| 173 | print("[{}] Could not upload".format(self.id)) | |
| 174 | self.p.terminate() | |
| 175 | removeDir(self.workingdir.fullpath()) | |
| 176 | self.p=None | |
| 177 | self.workingdir=None | |
| 178 | break | |
| 179 | else: | |
| 180 | print("[{}] VTU uploaded.".format(self.id)) | |
| 181 | else: #ping | |
| 182 | try: | |
| 183 | ping_run(self.conn_address, cid, rid) | |
| 184 | except: | |
| 185 | print("[{}] Could not ping.".format(self.id)) | |
| 186 | self.p.terminate() | |
| 187 | self.p=None | |
| 188 | removeDir(self.workingdir.fullpath()) | |
| 189 | self.workingdir=None | |
| 190 | #stop simulations | |
| 191 | break | |
| 192 | #check if trisurf is still running. If not break the innermost loop. | |
| 193 | sleep(1) | |
| 194 | if(self.p.poll() is not None): # trisurf exited! | |
| 195 | print("[{}] Trisurf was stopped with return code {}".format(self.id, self.p.returncode)) | |
| 196 | if(self.p.returncode>0): | |
| 197 | try: | |
| 198 | send_error_report(self.conn_address, cid, rid, self.p.returncode) | |
| 199 | except: | |
| 200 | print("[{}] Server didn't accept error report".format(self.id)) | |
| 201 | removeDir(self.workingdir.fullpath()) | |
| 202 | self.workingdir=None | |
| 203 | self.p=None | |
| 204 | break | |
| 205 | self.sleep(self.update_seconds-1) | |
| 206 | ||
| 207 | ||
| 208 | ||
| 209 | #Stolen from trisurf library... Therefore, this client is not dependent on the installation of the library. | |
| 210 | class Directory: | |
| 211 | ''' | |
| 212 | Class deals with the paths where the simulation is run and data is stored. | |
| 213 | ''' | |
| 214 | def __init__(self, maindir=".", simdir=""): | |
| 215 | '''Initialization Directory() takes two optional parameters, namely maindir and simdir. Defaults to current directory. It sets local variables maindir and simdir accordingly.''' | |
| 216 | self.maindir=maindir | |
| 217 | self.simdir=simdir | |
| 218 | return | |
| 219 | ||
| 220 | def fullpath(self): | |
| 221 | ''' | |
| 222 | Method returns string of path where the data is stored. It combines values of maindir and simdir as maindir/simdir on Unix. | |
| 223 | ''' | |
| 224 | return os.path.join(self.maindir,self.simdir) | |
| 225 | ||
| 226 | def exists(self): | |
| 227 | ''' Method checks whether the directory specified by fullpath() exists. It return True/False on completion.''' | |
| 228 | path=self.fullpath() | |
| 229 | if(os.path.exists(path)): | |
| 230 | return True | |
| 231 | else: | |
| 232 | return False | |
| 233 | ||
| 234 | def make(self): | |
| 235 | ''' Method make() creates directory. If it fails it exits the program with error message.''' | |
| 236 | try: | |
| 237 | os.makedirs(self.fullpath()) | |
| 238 | except: | |
| 239 | print("Cannot make directory "+self.fullpath()+"\n") | |
| 240 | exit(1) | |
| 241 | return | |
| 242 | ||
| 243 | def makeifnotexist(self): | |
| 244 | '''Method makeifnotexist() creates directory if it does not exist.''' | |
| 245 | if(self.exists()==0): | |
| 246 | self.make() | |
| 247 | return True | |
| 248 | else: | |
| 249 | return False | |
| 250 | ||
| 251 | def remove(self): | |
| 252 | '''Method remove() removes directory recursively. WARNING! No questions asked.''' | |
| 253 | if(self.exists()): | |
| 254 | try: | |
| 255 | os.rmdir(self.fullpath()) | |
| 256 | except: | |
| 257 | print("Cannot remove directory "+self.fullpath()+ "\n") | |
| 258 | exit(1) | |
| 259 | return | |
| 260 | ||
| 261 | def goto(self): | |
| 262 | ''' | |
| 263 | Method goto() moves current directory to the one specified by fullpath(). WARNING: when using the relative paths, do not call this function multiple times. | |
| 264 | ''' | |
| 265 | try: | |
| 266 | os.chdir(self.fullpath()) | |
| 267 | except: | |
| 268 | print("Cannot go to directory "+self.fullpath()+"\n") | |
| 269 | return | |
| 270 | ||
| 271 | ||
| 272 | ||
| 273 | #--- SIGINT and SIGTERM HANDLING --- | |
| 274 | def signal_handler(signal,frame): | |
| 275 | t.stop() | |
| 276 | t.join() | |
| 277 | print("Process ended with signal " +str(signal)) | |
| eccf3a | 278 | sys.exit(signal) |
| 4db06c | 279 | #--- END SIGINT and SIGTERM---- |
| SP | 280 | |
| 281 | if __name__ == '__main__': | |
| 282 | ||
| 283 | signal.signal(signal.SIGINT, signal_handler) | |
| 284 | signal.signal(signal.SIGTERM, signal_handler) | |
| 285 | ||
| 286 | t=ClientThread(update_seconds=100) | |
| 287 | t.start() | |
| 288 | print("main") | |
| 289 | while(True): | |
| 290 | sleep(1000) | |
