jobs - logging and error management

jobs/Job.py

@@ -1,4 +1,4 @@
-import abc, requests, redis, os
+import abc, requests, redis, os, datetime, traceback
 
 class Job(abc.ABC) :
 
@@ -9,14 +9,29 @@ class Job(abc.ABC) :
 		self.__redis = None
 		if redis_host != None :
 			self.__redis = redis.Redis(host=redis_host, port=6379, db=0)
+			try :
+				self.__redis.echo("test")
+			except :
+				self.__log("can't connect to redis host " + redis_host)
 		self.__type = type
 		self.__regex = regex
 
+	def __log(self, data) :
+		when = datetime.datetime.today().strftime("[%Y-%m-%d %H:%M:%S]")
+		what = self.__name + " - " + data + "\n"
+		with open("/var/log/nginx/jobs.log", "a") as f :
+			f.write(when + " " + what)
+
 	def run(self) :
-		if self.__type == "line" or self.__type == "file" :
-			self.__external()
-		elif self.__type == "exec" :
-			self.__exec()
+		try :
+			if self.__type == "line" or self.__type == "file" :
+				self.__external()
+			elif self.__type == "exec" :
+				self.__exec()
+		except Exception as e :
+			self.__log("exception while running job : " + traceback.format_exc())
+			return False
+		return True
 
 	def __external(self) :
 		if self.__redis == None :
@@ -54,10 +69,18 @@ class Job(abc.ABC) :
 	def __download_data(self, url) :
 		r = requests.get(url, stream=True)
 		if not r or r.status_code != 200 :
-			return False
+			raise Exception("can't download data at " + url)
 		if self.__type == "line" :
 			return r.iter_lines()
 		return r.iter_content(chunk_size=8192)
 
 	def __exec(self) :
 		proc = subprocess.run(self.__data, capture_output=True)
+		stdout = proc.stdout.decode("ascii")
+		stderr = proc.stderr.decode("err")
+		if len(stdout) > 1 :
+			self.__log("stdout = " + stdout)
+		if len(stderr) > 1 :
+			self.__log("stderr = " + stderr)
+		if proc.returncode != 0 :
+			raise Exception("error code " + str(proc.returncode))