372 lines
11 KiB
Python
372 lines
11 KiB
Python
import json
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import threading
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import time
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from platypush.backend.http.utils import HttpUtils
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from platypush.config import Config
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from platypush.plugins import Plugin, action
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from platypush.procedure import Procedure
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from platypush.utils import get_enabled_plugins
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class UtilsPlugin(Plugin):
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"""
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A plugin for general-purpose util methods
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"""
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_DEFAULT_TIMEOUT_PREFIX = '_PlatypushTimeout_'
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_timeout_hndl_idx = 0
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_timeout_hndl_idx_lock = threading.RLock()
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_DEFAULT_INTERVAL_PREFIX = '_PlatypushInterval_'
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_interval_hndl_idx = 0
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_interval_hndl_idx_lock = threading.RLock()
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_pending_timeouts = {}
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_pending_intervals = {}
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_pending_timeouts_lock = threading.RLock()
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_pending_intervals_lock = threading.RLock()
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self._plugins = {}
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self._plugins_lock = threading.RLock()
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@action
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def sleep(self, seconds):
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"""
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Make the current executor sleep for the specified number of seconds.
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:param seconds: Sleep seconds
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:type seconds: float
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"""
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time.sleep(seconds)
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@action
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def set_timeout(self, seconds, actions, name=None, **args):
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"""
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Define a set of actions to run after the specified amount of `seconds`.
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:param seconds: Number of seconds before running the timeout procedure
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:type seconds: float
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:param actions: List of actions to be executed after the timeout expires
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:type actions: list[dict]
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:param name: Set an optional name for this timeout. It is advised to set
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a name if you are planning to programmatically cancel the timeout in
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your business logic.
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:type name: str
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:param args: Optional arguments/context to pass to the timeout function
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"""
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with self._timeout_hndl_idx_lock:
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self._timeout_hndl_idx += 1
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if not name:
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name = self._DEFAULT_TIMEOUT_PREFIX + str(self._timeout_hndl_idx)
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if name in self._pending_timeouts:
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return (None,
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"A timeout named '{}' is already awaiting".format(name))
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procedure = Procedure.build(name=name, requests=actions, _async=False)
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self._pending_timeouts[name] = procedure
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def _proc_wrapper(procedure, **kwargs):
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try:
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procedure.execute(**kwargs)
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finally:
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with self._pending_timeouts_lock:
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if name in self._pending_timeouts:
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del self._pending_timeouts[name]
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with self._pending_timeouts_lock:
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self._pending_timeouts[name] = threading.Timer(seconds,
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_proc_wrapper,
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args=[procedure],
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kwargs=args)
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self._pending_timeouts[name].start()
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@action
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def clear_timeout(self, name):
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"""
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Clear a pending timeout procedure
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:param name: Name of the timeout to clear
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:type name: str
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"""
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with self._pending_timeouts_lock:
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if name not in self._pending_timeouts:
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self.logger.debug('{} is not a pending timeout'.format(name))
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return
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timer = self._pending_timeouts.pop(name)
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timer.cancel()
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@action
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def get_timeouts(self):
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"""
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Get info about the pending timeouts
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:returns: dict.
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Example::
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{
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"test_timeout": {
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"seconds": 10.0,
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"actions": [
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{
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"action": "action_1",
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"args": {
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"name_1": "value_1"
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}
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}
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]
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}
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}
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"""
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response = {}
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for name in self._pending_timeouts.keys():
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response[name] = self.get_timeout(name).output.get(name)
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return response
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@action
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def get_timeout(self, name):
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"""
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Get info about a pending timeout
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:param name: Name of the timeout to get
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:type name: str
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:returns: dict
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Example::
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{
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"test_timeout": {
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"seconds": 10.0,
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"actions": [
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{
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"action": "action_1",
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"args": {
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"name_1": "value_1"
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}
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}
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]
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}
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}
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If no such timeout exist with the specified name then the value of the
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timeout name will be null.
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"""
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response = {name: None}
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with self._pending_timeouts_lock:
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timer = self._pending_timeouts.get(name)
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if not timer:
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return response
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return {
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name: {
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'seconds': timer.interval,
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'actions': [
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json.loads(str(a)) for a in timer.args[0].requests
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]
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}
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}
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@action
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def set_interval(self, seconds, actions, name=None, **args):
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"""
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Define a set of actions to run each specified amount of `seconds`.
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:param seconds: Number of seconds between two runs of the interval
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procedure
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:type seconds: float
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:param actions: List of actions to be executed at each interval
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:type actions: list[dict]
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:param name: Set an optional name for this interval. It is advised to
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set a name if you are planning to programmatically cancel the
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interval in your business logic.
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:type name: str
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:param args: Optional arguments/context to pass to the interval function
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"""
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with self._interval_hndl_idx_lock:
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self._interval_hndl_idx += 1
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if not name:
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name = self._DEFAULT_INTERVAL_PREFIX + \
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str(self._interval_hndl_idx)
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if name in self._pending_intervals:
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return (None,
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"An interval named '{}' is already running".format(name))
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procedure = Procedure.build(name=name, requests=actions, _async=False)
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self._pending_intervals[name] = procedure
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def _proc_wrapper(procedure, seconds, **kwargs):
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while True:
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with self._pending_intervals_lock:
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if name not in self._pending_intervals:
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return
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procedure.execute(**kwargs)
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time.sleep(seconds)
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with self._pending_intervals_lock:
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self._pending_intervals[name] = threading.Thread(
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target=_proc_wrapper, args=[procedure, seconds], kwargs=args)
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self._pending_intervals[name].start()
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@action
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def clear_interval(self, name):
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"""
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Clear a running interval procedure
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:param name: Name of the interval to clear
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:type name: str
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"""
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with self._pending_intervals_lock:
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if name not in self._pending_intervals:
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self.logger.debug('{} is not a running interval'.format(name))
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return
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del self._pending_intervals[name]
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@action
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def get_intervals(self):
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"""
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Get info about the running intervals
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:returns: dict
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Example::
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{
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"test_interval": {
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"seconds": 10.0,
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"actions": [
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{
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"action": "action_1",
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"args": {
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"name_1": "value_1"
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}
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}
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]
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}
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}
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"""
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response = {}
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for name in self._pending_intervals.keys():
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response[name] = self.get_interval(name).output.get(name)
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return response
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@action
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def get_interval(self, name):
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"""
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Get info about a running interval
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:param name: Name of the interval to get
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:type name: str
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:returns: dict. Example:
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.. code-block:: json
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{
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"test_interval": {
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"seconds": 10.0,
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"actions": [
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{
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"action": "action_1",
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"args": {
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"name_1": "value_1"
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}
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}
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]
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}
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}
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If no such interval exist with the specified name then the value of the
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timeout name will be null.
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"""
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response = {name: None}
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with self._pending_intervals_lock:
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timer = self._pending_intervals.get(name)
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if not timer:
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return response
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# noinspection PyProtectedMember
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return {
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name: {
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'seconds': timer._args[1],
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'actions': [
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json.loads(str(a)) for a in timer._args[0].requests
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]
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}
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}
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@action
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def search_directory(self, directory, extensions, recursive=False):
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return HttpUtils.search_directory(directory, recursive=recursive, *extensions)
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@action
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def search_web_directory(self, directory, extensions):
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return HttpUtils.search_web_directory(directory, *extensions)
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@action
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def get_enabled_plugins(self) -> dict:
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"""
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:return: The list of enabled plugins as a ``name -> configuration`` map.
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"""
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if self._plugins:
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return self._plugins
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plugins = {}
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with self._plugins_lock:
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for name in get_enabled_plugins().keys():
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plugins[name] = Config.get(name)
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return plugins
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@action
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def get_sensor_plugins(self) -> dict:
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"""
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:return: The list of enabled sensor plugins as a ``name -> configuration`` map.
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"""
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from platypush.plugins.sensor import SensorPlugin
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return {
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name: Config.get(name)
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for name, plugin in get_enabled_plugins().items()
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if isinstance(plugin, SensorPlugin)
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}
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@action
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def get_switch_plugins(self) -> dict:
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"""
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:return: The list of enabled switch plugins as a ``name -> configuration`` map.
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"""
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from platypush.plugins.switch import SwitchPlugin
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return {
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name: Config.get(name)
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for name, plugin in get_enabled_plugins().items()
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if isinstance(plugin, SwitchPlugin)
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}
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# vim:sw=4:ts=4:et:
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