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jobber.py
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jobber.py
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import time
import pandas as pd
import threading
from queue import Queue
SUCCESS = "SUCCESS"
FAIL = "FAIL"
NOT_FOUND = "NOT_FOUND"
class CircularDependencyException(Exception):
pass
class DependencyNotFound(Exception):
pass
class JLogger:
def __get_time(self):
return time.strftime("%H:%M:%S", time.gmtime())
def header(self, msg):
msg_len = len(msg)
prefix = f"[{self.__get_time()}] # "
prefix_len = len(prefix)
tail_len = 99 - msg_len - prefix_len
tail = "#" * tail_len
print(prefix + f"{msg} " + tail)
def info(self, msg):
print(f"[{self.__get_time()}] [INFO] {msg}")
def err(self, msg):
print(f"[{self.__get_time()}] [ERROR] {msg}")
jlog = JLogger()
class Jobber:
def __init__(self, concurrency):
self.registry = {}
self.dependency_tree = {}
self.work_log = None
self.concurrency = concurrency
def decorator(self,dependencies=[],parallelism=1):
def registrar(func):
for i in range(parallelism):
deps = [d+str(i) for d in dependencies]
self.registry[func.__name__ + str(i)] = func
self.dependency_tree[func.__name__ + str(i)] = set(deps)
return func
return registrar
def get_registry(self):
return self.registry
def get_dependencies(self):
d = Dependencies(self.dependency_tree)
try:
return d.resolve()
except CircularDependencyException as e:
loop = e.args[0]['loop']
node = e.args[0]['node']
message = e.args[0]['message']
counter = e.args[0]['dependencies']
err_msg = "Circular dependency detected"\
+ f" between {loop} and {node}\n"\
+ f" message: {message}\n"\
+ f" {loop}: {self.dependency_tree[loop]}\n"\
+ f" {node}: {self.dependency_tree[node]}i\n"\
+ f" recursion counter: {counter}"
jlog.err(err_msg)
raise SystemExit(1)
except DependencyNotFound as e:
loop = e.args[0]['loop']
node = e.args[0]['node']
message = e.args[0]['message']
counter = e.args[0]['dependencies']
err_msg = "Dependency not found. Check parallelism"\
+ f" and/or depencies name\n"\
+ f" message: {message}\n"\
+ f" {loop}: {self.dependency_tree[loop]}\n"\
+ f" {node}: {self.dependency_tree[node]}\n"\
+ f" recursion counter: {counter}"
jlog.err(err_msg)
raise SystemExit(1)
def work(self):
jc = JobberConsumer(
self.get_registry(),
self.get_dependencies(),
self.concurrency
)
jc.start()
self.work_log = jc.get_logs()
def get_report(self):
return self.work_log
class Node:
""" todo """
def __init__(self, name):
self.name = name
self.edges = []
def addEdge(self, node):
""" todo """
self.edges.append(node)
def __str__(self):
edges_name = [n.name for n in self.edges]
return f"{self.name}:[{','.join(edges_name)}]"
class Dependencies:
nodes = {}
resolved = []
ordered_dep_tree = []
tmp = {}
def __init__(self, dep_tree):
self.dep_tree = dep_tree
self.current_node = None
def processTable(self, _task):
""" todo """
self.nodes[_task] = Node(_task)
if self.dep_tree[_task]:
for dep in self.dep_tree[_task]:
self.nodes[_task].addEdge(Node(dep))
def dep_resolve(self, node, counter=[]):
""" todo """
if len(counter) > len(node.edges) + 1:
raise CircularDependencyException({
"message": f"Recursion limit reached",
"loop": node.name,
"node": self.current_node,
"dependencies": counter,
})
for edge in node.edges:
try:
if edge.name not in self.resolved:
counter.append(node.name)
self.dep_resolve(self.nodes[edge.name], counter)
except KeyError:
raise DependencyNotFound({
"message": f"{edge.name}: dependency not found",
"loop": node.name,
"node": self.current_node,
"dependencies": counter,
})
if node.name not in self.resolved:
self.resolved.append(node.name)
def findMaxChildDepth(self, _task):
""" todo """
maxDepth = 0
for dep in self.dep_tree[_task]:
if self.tmp[dep] > maxDepth:
maxDepth = self.tmp[dep]
return maxDepth + 1
def resolve(self):
self.nodes = {}
self.resolved = []
self.ordered_dep_tree = []
self.tmp = {}
for task in self.dep_tree:
self.processTable(task)
for n in self.nodes:
self.current_node = n
self.dep_resolve(self.nodes[n])
for task in self.resolved:
if self.dep_tree[task]:
i = self.findMaxChildDepth(task)
else:
i = 0
self.tmp[task] = i
try:
self.ordered_dep_tree[i]
except Exception:
for x in range(len(self.ordered_dep_tree)-1, i):
self.ordered_dep_tree.append([])
self.ordered_dep_tree[i].append(task)
return self.ordered_dep_tree
class JobberConsumer:
def __init__(self, tasks, tasks_workflow, concurrency_range=2):
self.tasks= tasks
self.tasks_workflow = tasks_workflow
self.starting_ts = threading.active_count()
self.q_log = Queue(maxsize=0)
self.q_worker = Queue(maxsize=0)
self.concurrency_range = concurrency_range
self.history_df = None
self.history_full = []
self.history_not_found = []
self.history_success = []
self.history_fail = []
def __log_to_df(self):
columns = ['id', 'step', 'action', 'status', 'message']
my_name = threading.current_thread().name
history_tmp = []
while True:
imessage = self.q_log.get()
action_key = imessage['action_key']
if action_key == "STOP":
jlog.info(f"Thread {my_name}: STOP signal received")
self.history_not_found = [t for t in history_tmp
if NOT_FOUND == t[3]]
self.history_success = [t for t in history_tmp
if SUCCESS == t[3]]
self.history_fail = [t for t in history_tmp if FAIL == t[3]]
jlog.info(
"TOTAL: {} | SUCCESS: {} | NOT_FOUND: {}".format(
len(self.history_full),
len(self.history_success),
len(self.history_not_found),
)
+ " | FAIL: {} ".format(
len(self.history_fail)
)
)
self.history_df = pd.DataFrame(self.history_full)
self.history_df.columns = columns
break
if action_key == 'w':
action_val = imessage['action_val']
self.history_full.append(action_val)
history_tmp.append(action_val)
elif action_key == 'h':
action_val = imessage['action_val']
history_tmp.append(action_val)
elif action_key == 'r':
try:
self.history_not_found = [t for t in history_tmp
if NOT_FOUND == t[3]]
self.history_success = [t for t in history_tmp
if SUCCESS == t[3]]
self.history_fail = [t for t in history_tmp
if FAIL == t[3]]
self.q_worker.put(["STOP"])
except Exception as e:
jlog.err(e)
self.q_log.task_done()
def __run_consumer(self):
my_name = threading.current_thread().name
while True:
imessage = self.q_worker.get()
worker_id = time.time()
jlog.info(f"Thread {my_name}_{worker_id}: {imessage}")
if not self.q_worker.empty():
jlog.info(f"Thread {my_name}_{worker_id} queue items left:")
for item in list(self.q_worker.queue):
print(f" {item}")
if not imessage:
jlog.err(f"Thread {my_name}_{worker_id}: imessage IS EMPTY!")
self.q_worker.task_done()
break
if imessage[0] == "STOP":
jlog.info(
f"Thread {my_name}_{worker_id}: STOP signal received")
self.q_worker.task_done()
break
for task in imessage:
status = "UNKNOWN"
message = ""
try:
self.tasks[task]()
status = SUCCESS
except Exception as e:
status = FAIL
message = f"{type(e).__name__}: {str(e)}"
finally:
jlog.info(f"Thread {my_name}_{worker_id}:"\
+ f" {status} {task} {message}")
_l_activity = {
"action_key": "w",
"action_val": (
int(time.time()*1000), # id
"run_consumer", # step
task, # action
status, # status
message, # message
)
}
self.q_log.put(_l_activity)
self.q_log.put({"action_key": 'r'})
self.q_worker.task_done()
def get_logs(self):
return self.history_df
def start(self):
jlog.header("LOGGING THREAD SETUP")
t_logger = threading.Thread(
target=self.__log_to_df,
args=(),
name="Holy Logger"
)
t_logger.setDaemon(True)
t_start = time.time()
t_logger.start()
jlog.header("JOB STARTED")
l_activity = {
"action_key": "h",
"action_val": (
int(time.time()*1000), # id
"MAIN", # step
"Run parallel consumenrs", # action
"STARTING", # status
str(time.time() - t_start), # message
)
}
self.q_log.put(l_activity)
jlog.header("Activity message sent")
for dependency_set in self.tasks_workflow:
concurrency = 0
og_chunks = [dependency_set[i::self.concurrency_range]
for i in range(self.concurrency_range)]
for task_list in og_chunks:
if task_list:
self.q_worker.put(task_list)
concurrency += 1
jlog.header("Workers messages sent")
threads = []
if concurrency > self.concurrency_range:
concurrency = self.concurrency_range
for i in range(concurrency):
t_worker = threading.Thread(
target=self.__run_consumer,
args=(),
name="consumer_" + str(i))
t_worker.setDaemon(True)
t_worker.start()
threads.append(t_worker)
jlog.header("Threads started")
self.q_worker.join()
for t_worker in threads:
t_worker.join()
jlog.info(
"SUCCESS: {} | NOT_FOUND: {} ".format(
len(self.history_success),
len(self.history_not_found)
)
+ "| FAIL: {}".format(len(self.history_fail))
)
self.q_log.join()
jlog.header("LOGGER STOP")
self.q_log.put({"action_key": "STOP"})
t_logger.join()
jlog.header("JOB FINISHED")
jlog.info(
"workers: {} | workers queue size: {} | log queue size: {}"\
.format(
(threading.active_count() - self.starting_ts),
self.q_worker.qsize(),
self.q_log.qsize(),
)
)