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from __future__ import annotations
import json
import logging
import os
import os.path
from datetime import datetime
from tlz import first, merge
from tornado import escape
from tornado.websocket import WebSocketHandler
from dask.utils import format_bytes, format_time
from distributed.diagnostics.websocket import WebsocketPlugin
from distributed.http.utils import RequestHandler, redirect
from distributed.metrics import time
from distributed.utils import log_errors
ns = {
func.__name__: func
for func in [format_bytes, format_time, datetime.fromtimestamp, time]
}
rel_path_statics = {"rel_path_statics": "../../.."}
logger = logging.getLogger(__name__)
class Workers(RequestHandler):
@log_errors
def get(self):
self.render(
"workers.html",
title="Workers",
scheduler=self.server,
**merge(
self.server.__dict__,
self.server.__pdict__,
ns,
self.extra,
rel_path_statics,
),
)
class Worker(RequestHandler):
@log_errors
def get(self, worker):
worker = escape.url_unescape(worker)
if worker not in self.server.workers:
self.send_error(404)
return
self.render(
"worker.html",
title="Worker: " + worker,
scheduler=self.server,
Worker=worker,
**merge(
self.server.__dict__,
self.server.__pdict__,
ns,
self.extra,
rel_path_statics,
),
)
class Exceptions(RequestHandler):
@log_errors
def get(self):
self.render(
"exceptions.html",
title="Exceptions",
scheduler=self.server,
**merge(
self.server.__dict__,
self.server.__pdict__,
ns,
self.extra,
rel_path_statics,
),
)
class Task(RequestHandler):
@log_errors
def get(self, task):
task = escape.url_unescape(task)
if task not in self.server.tasks:
self.send_error(404)
return
self.render(
"task.html",
title="Task: " + task,
Task=task,
scheduler=self.server,
**merge(
self.server.__dict__,
self.server.__pdict__,
ns,
self.extra,
rel_path_statics,
),
)
class Logs(RequestHandler):
@log_errors
def get(self):
logs = self.server.get_logs()
self.render(
"logs.html",
title="Logs",
logs=logs,
**merge(self.extra, rel_path_statics),
)
class WorkerLogs(RequestHandler):
@log_errors
async def get(self, worker):
worker = escape.url_unescape(worker)
logs = await self.server.get_worker_logs(workers=[worker])
logs = logs[worker]
self.render(
"logs.html",
title="Logs: " + worker,
logs=logs,
**merge(self.extra, rel_path_statics),
)
class WorkerCallStacks(RequestHandler):
@log_errors
async def get(self, worker):
worker = escape.url_unescape(worker)
keys = {ts.key for ts in self.server.workers[worker].processing}
call_stack = await self.server.get_call_stack(keys=keys)
self.render(
"call-stack.html",
title="Call Stacks: " + worker,
call_stack=call_stack,
**merge(self.extra, rel_path_statics),
)
class TaskCallStack(RequestHandler):
@log_errors
async def get(self, key):
key = escape.url_unescape(key)
call_stack = await self.server.get_call_stack(keys=[key])
if not call_stack:
self.write(
"<p>Task not actively running. "
"It may be finished or not yet started</p>"
)
else:
self.render(
"call-stack.html",
title="Call Stack: " + key,
call_stack=call_stack,
**merge(self.extra, rel_path_statics),
)
class IndividualPlots(RequestHandler):
def get(self):
try:
from bokeh.server.tornado import BokehTornado
bokeh_application = first(
app
for app in self.server.http_application.applications
if isinstance(app, BokehTornado)
)
individual_bokeh = {
uri.strip("/").replace("-", " ").title(): uri
for uri in bokeh_application.app_paths
if uri.lstrip("/").startswith("individual-")
and not uri.endswith(".json")
}
individual_static = {
uri.strip("/")
.replace(".html", "")
.replace("-", " ")
.title(): "/statics/"
+ uri
for uri in os.listdir(
os.path.join(os.path.dirname(__file__), "..", "static")
)
if uri.lstrip("/").startswith("individual-") and uri.endswith(".html")
}
result = {**individual_bokeh, **individual_static}
self.write(result)
except (ImportError, StopIteration):
self.write({})
class EventstreamHandler(WebSocketHandler):
def initialize(self, dask_server=None, extra=None):
self.server = dask_server
self.extra = extra or {}
self.plugin = WebsocketPlugin(self, self.server)
self.server.add_plugin(self.plugin)
def send(self, name, data):
data["name"] = name
for k in list(data):
# Drop bytes objects for now
if isinstance(data[k], bytes):
del data[k]
self.write_message(data)
def open(self):
for worker in self.server.workers:
self.plugin.add_worker(self.server, worker)
def on_message(self, message):
message = json.loads(message)
if message["name"] == "ping":
self.send("pong", {"timestamp": str(datetime.now())})
def on_close(self):
self.server.remove_plugin(name=self.plugin.name)
routes: list[tuple] = [
(r"info", redirect("info/main/workers.html"), {}),
(r"info/main/workers.html", Workers, {}),
(r"info/main/exceptions.html", Exceptions, {}),
(r"info/worker/(.*).html", Worker, {}),
(r"info/task/(.*).html", Task, {}),
(r"info/main/logs.html", Logs, {}),
(r"info/call-stacks/(.*).html", WorkerCallStacks, {}),
(r"info/call-stack/(.*).html", TaskCallStack, {}),
(r"info/logs/(.*).html", WorkerLogs, {}),
(r"individual-plots.json", IndividualPlots, {}),
(r"eventstream", EventstreamHandler, {}),
]
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