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from __future__ import annotations
import time
from argparse import Namespace
from functools import partial
from typing import Any, cast
import attr
from blessed import Terminal
from . import __version__, activities, handlers, keys, types, utils, views, widgets
from .config import Configuration, Flag
from .data import Data
def main(
term: Terminal,
config: Configuration | None,
data: Data,
host: types.Host,
options: Namespace,
*,
render_header: bool = True,
render_footer: bool = True,
width: int | None = None,
wait_on_actions: float | None = None,
) -> None:
fs_blocksize = options.blocksize
is_local = data.pg_is_local() and data.pg_is_local_access()
skip_db_size = not options.dbsize
server_information = data.pg_get_server_information(
prev_server_info=None,
using_rds=options.rds,
skip_db_size=skip_db_size,
skip_tempfile=not options.tempfiles,
skip_walreceiver=not options.walreceiver,
)
flag = Flag.load(config, is_local=is_local, **vars(options))
ui = types.UI.make(
header=types.UIHeader.make(
config.header() if config else None,
show_instance=options.header_show_instance,
show_system=options.header_show_system,
show_workers=options.header_show_workers,
),
config=config,
flag=flag,
refresh_time=options.refresh,
min_duration=options.minduration,
duration_mode=int(options.durationmode),
wrap_query=options.wrap_query,
max_db_length=min(max(server_information.max_dbname_length, 8), 16),
filters=data.filters,
)
key, in_help = None, False
sys_procs: dict[int, types.SystemProcess] = {}
pg_procs = types.SelectableProcesses([])
activity_stats: types.ActivityStats
msg_pile = utils.MessagePile(2)
with term.fullscreen(), term.cbreak(), term.hidden_cursor():
while True:
if key == keys.HELP:
in_help = True
elif in_help and key is not None:
in_help, key = False, None
print(term.clear + term.home, end="")
elif key == keys.EXIT:
break
elif not ui.interactive() and key == keys.SPACE:
ui.toggle_pause()
elif not options.dbsize and key == keys.REFRESH_DB_SIZE:
skip_db_size = False
elif key is not None:
if keys.is_process_next(key):
if pg_procs.focus_next():
ui.start_interactive()
elif keys.is_process_prev(key):
if pg_procs.focus_prev():
ui.start_interactive()
elif keys.is_process_nextpage(key):
if pg_procs.focus_next(term.height // 3):
ui.start_interactive()
elif keys.is_process_prevpage(key):
if pg_procs.focus_prev(term.height // 3):
ui.start_interactive()
elif keys.is_process_first(key):
if pg_procs.focus_first():
ui.start_interactive()
elif keys.is_process_last(key):
if pg_procs.focus_last():
ui.start_interactive()
elif key == keys.SPACE:
pg_procs.toggle_pin_focused()
elif key == keys.COPY_TO_CLIPBOARD:
msg = pg_procs.copy_focused_query_to_clipboard()
msg_pile.send(msg)
elif key.name == keys.CANCEL_SELECTION:
pg_procs.reset()
ui.end_interactive()
elif keys.is_toggle_header_system(key):
ui.header.toggle_system()
elif keys.is_toggle_header_instance(key):
ui.header.toggle_instance()
elif keys.is_toggle_header_workers(key):
ui.header.toggle_workers()
elif pg_procs.selected and key in (
keys.PROCESS_CANCEL,
keys.PROCESS_KILL,
):
action, color = {
keys.PROCESS_CANCEL: ("cancel", "yellow"),
keys.PROCESS_KILL: ("terminate", "red"),
}[key]
action_formatter = getattr(term, color)
pids = pg_procs.selected
if len(pids) > 1:
ptitle = f"processes {', '.join(str(p) for p in pids)}"
else:
ptitle = f"process {pids[0]}"
with term.location(x=0, y=term.height // 3):
print(
widgets.boxed(
term,
f"Confirm {action_formatter(action)} action on {ptitle}? (y/n)",
border_color=color,
center=True,
width=width,
),
end="",
)
confirm_key = term.inkey(timeout=None)
if confirm_key.lower() == "y":
if action == "cancel":
for pid in pids:
data.pg_cancel_backend(pid)
msg_pile.send(
action_formatter(f"{ptitle.capitalize()} cancelled")
)
elif action == "terminate":
for pid in pids:
data.pg_terminate_backend(pid)
msg_pile.send(
action_formatter(f"{ptitle.capitalize()} terminated")
)
pg_procs.reset()
ui.end_interactive()
if wait_on_actions:
# Used in tests.
time.sleep(wait_on_actions)
else:
pg_procs.reset()
ui.end_interactive()
changes: dict[str, Any] = {
"duration_mode": handlers.duration_mode(key, ui.duration_mode),
"wrap_query": handlers.wrap_query(key, ui.wrap_query),
}
if key in (keys.REFRESH_TIME_INCREASE, keys.REFRESH_TIME_DECREASE):
changes["refresh_time"] = handlers.refresh_time(
key, ui.refresh_time
)
query_mode = handlers.query_mode(key)
if query_mode is not None:
changes["query_mode"] = query_mode
else:
query_mode = ui.query_mode
sort_key = handlers.sort_key_for(key, query_mode, flag)
if sort_key is not None:
changes["sort_key"] = sort_key
ui.evolve(**changes)
if in_help:
# Only draw help screen once.
if key is not None:
print(term.clear + term.home, end="")
views.help(
term,
__version__,
is_local,
lines_counter=views.line_counter(term.height),
)
else:
if not ui.in_pause and not ui.interactive():
if not options.dbsize and not skip_db_size:
skip_db_size = True
server_information = data.pg_get_server_information(
prev_server_info=server_information,
using_rds=options.rds,
skip_db_size=skip_db_size,
skip_tempfile=not options.tempfiles,
skip_walreceiver=not options.walreceiver,
)
memory, swap, load = activities.mem_swap_load()
system_info = types.SystemInfo.default(
memory=memory, swap=swap, load=load
)
if is_local:
memory, swap, load = activities.mem_swap_load()
system_info = attr.evolve(
system_info,
memory=memory,
swap=swap,
load=load,
)
if ui.query_mode == types.QueryMode.activities:
pg_procs.set_items(data.pg_get_activities(ui.duration_mode))
if is_local:
# TODO: Use this logic in waiting and blocking cases.
local_pg_procs, io_read, io_write = activities.ps_complete(
cast(list[types.RunningProcess], pg_procs.items),
sys_procs,
fs_blocksize,
)
system_info = attr.evolve(
system_info,
io_read=io_read,
io_write=io_write,
max_iops=activities.update_max_iops(
system_info.max_iops,
io_read.count,
io_write.count,
),
)
pg_procs.set_items(local_pg_procs)
else:
if ui.query_mode == types.QueryMode.blocking:
pg_procs.set_items(data.pg_get_blocking(ui.duration_mode))
elif ui.query_mode == types.QueryMode.waiting:
pg_procs.set_items(data.pg_get_waiting(ui.duration_mode))
else:
assert False # help type checking
activity_stats = (pg_procs, system_info) if is_local else pg_procs # type: ignore[assignment]
if options.output is not None:
custom_asdict = partial(attr.asdict, recurse=True)
with open(options.output, "a") as f:
utils.csv_write(f, map(custom_asdict, pg_procs.items))
views.screen(
term,
ui,
host=host,
pg_version=data.pg_version,
server_information=server_information,
activity_stats=activity_stats,
message=msg_pile.get(),
render_header=render_header,
render_footer=render_footer,
width=width,
)
if ui.interactive():
if not pg_procs.pinned:
ui.tick_interactive()
elif pg_procs.selected:
pg_procs.reset()
key = term.inkey(timeout=ui.refresh_time) or None
|
