Merge pull request #103 from home-assistant/cleanup-after-use

Cleanup after use

.travis.yml

@@ -4,8 +4,7 @@ cache:
   directories:
     - $HOME/.cache/pip
 python:
-  - 2.7
-  - 3.4
+  - 3.4.2
 install:
   - pip install -r requirements.txt
   - pip install pylint flake8

README.md

@@ -1,6 +1,6 @@
 # NetDisco
 
-NetDisco is a Python (2 and 3) library to discover local devices and services. It allows to scan on demand or offer a service that will scan the network in the background in a set interval.
+NetDisco is a Python 3 library to discover local devices and services. It allows to scan on demand or offer a service that will scan the network in the background in a set interval.
 
 Current methods of scanning:
 
@@ -15,7 +15,7 @@ It is the library that powers the device discovery within [Home Assistant](https
 
 ## Installation
 
-Netdisco is available on PyPi. Install using `pip3 install netdisco` (use `pip` if you're still on Python 2).
+Netdisco is available on PyPi. Install using `pip3 install netdisco`.
 
 ## Example
 

netdisco/__main__.py

@@ -1,5 +1,4 @@
 """Command line tool to print discocvered devices or dump raw data."""
-from __future__ import print_function
 import sys
 
 from netdisco.discovery import NetworkDiscovery

netdisco/daikin.py

@@ -1,6 +1,5 @@
 """Daikin device discovery."""
 import socket
-import threading
 
 # pylint: disable=unused-import, import-error, no-name-in-module
 try:
@@ -27,12 +26,10 @@ class Daikin(object):
     def __init__(self):
         """Initialize the Daikin discovery."""
         self.entries = []
-        self._lock = threading.RLock()
 
     def scan(self):
         """Scan the network."""
-        with self._lock:
-            self.update()
+        self.update()
 
     def all(self):
         """Scan and return all found entries."""

netdisco/discoverables/denonavr.py

@@ -1,11 +1,5 @@
 """Discover Denon AVR devices."""
-
-try:
-    # python 3
-    from urllib.parse import urlparse
-except ImportError:
-    # python 2
-    from urlparse import urlparse
+from urllib.parse import urlparse
 
 from . import SSDPDiscoverable
 

netdisco/discoverables/samsung_tv.py

@@ -1,11 +1,5 @@
 """Discover Samsung Smart TV services."""
-
-try:
-    # python 3
-    from urllib.parse import urlparse
-except ImportError:
-    # python 2
-    from urlparse import urlparse
+from urllib.parse import urlparse
 
 from . import SSDPDiscoverable
 

netdisco/discovery.py

@@ -1,9 +1,7 @@
 """Combine all the different protocols into a simple interface."""
-from __future__ import print_function
 import logging
 import os
 import importlib
-import threading
 
 from .ssdp import SSDP
 from .mdns import MDNS
@@ -36,54 +34,44 @@ class NetworkDiscovery(object):
     def __init__(self):
         """Initialize the discovery."""
 
-        self.mdns = MDNS()
-        self.ssdp = SSDP()
-        self.gdm = GDM()
-        self.lms = LMS()
-        self.tellstick = Tellstick()
-        self.daikin = Daikin()
-        # self.samsungac = SamsungAC()
-        self.phue = PHueNUPnPDiscovery()
-        self.discoverables = {}
-
-        self._load_device_support()
+        self.mdns = None
+        self.ssdp = None
+        self.gdm = None
+        self.lms = None
+        self.tellstick = None
+        self.daikin = None
+        self.phue = None
 
         self.is_discovering = False
+        self.discoverables = None
 
     def scan(self):
         """Start and tells scanners to scan."""
-        if not self.is_discovering:
-            self.mdns.start()
-            self.is_discovering = True
+        self.is_discovering = True
 
-        # Start all discovery processes in parallel
-        ssdp_thread = threading.Thread(target=self.ssdp.scan)
-        ssdp_thread.start()
+        self.mdns = MDNS()
+        self.mdns.start()
 
-        gdm_thread = threading.Thread(target=self.gdm.scan)
-        gdm_thread.start()
+        # Needs to be after MDNS
+        self._load_device_support()
 
-        lms_thread = threading.Thread(target=self.lms.scan)
-        lms_thread.start()
+        self.ssdp = SSDP()
+        self.ssdp.scan()
 
-        tellstick_thread = threading.Thread(target=self.tellstick.scan)
-        tellstick_thread.start()
+        self.gdm = GDM()
+        self.gdm.scan()
 
-        daikin_thread = threading.Thread(target=self.daikin.scan)
-        daikin_thread.start()
+        self.lms = LMS()
+        self.lms.scan()
 
-        # self.samsungac.scan()
+        self.tellstick = Tellstick()
+        self.tellstick.scan()
 
-        phue_thread = threading.Thread(target=self.phue.scan)
-        phue_thread.start()
+        self.daikin = Daikin()
+        self.daikin.scan()
 
-        # Wait for all discovery processes to complete
-        ssdp_thread.join()
-        gdm_thread.join()
-        lms_thread.join()
-        tellstick_thread.join()
-        daikin_thread.join()
-        phue_thread.join()
+        self.phue = PHueNUPnPDiscovery()
+        self.phue.scan()
 
     def stop(self):
         """Turn discovery off."""
@@ -92,11 +80,20 @@ def stop(self):
 
         self.mdns.stop()
 
+        # Not removing SSDP because it tracks state
+        self.mdns = None
+        self.gdm = None
+        self.lms = None
+        self.tellstick = None
+        self.daikin = None
+        self.phue = None
+        self.discoverables = None
         self.is_discovering = False
 
     def discover(self):
         """Return a list of discovered devices and services."""
-        self._check_enabled()
+        if not self.is_discovering:
+            raise RuntimeError("Needs to be called after start, before stop")
 
         return [dis for dis, checker in self.discoverables.items()
                 if checker.is_discovered()]
@@ -109,11 +106,6 @@ def get_entries(self, dis):
         """Get a list with all info about a discovered type."""
         return self.discoverables[dis].get_entries()
 
-    def _check_enabled(self):
-        """Raise RuntimeError if discovery is disabled."""
-        if not self.is_discovering:
-            raise RuntimeError("NetworkDiscovery is disabled")
-
     def _load_device_support(self):
         """Load the devices and services that can be discovered."""
         self.discoverables = {}

netdisco/gdm.py

@@ -6,7 +6,6 @@
   https://github.com/hippojay/script.plexbmc.helper/resources/lib/plexgdm.py
   iBaa's PlexConnect: https://github.com/iBaa/PlexConnect/PlexAPI.py
 """
-import threading
 import socket
 
 
@@ -16,12 +15,10 @@ class GDM(object):
     def __init__(self):
         self.entries = []
         self.last_scan = None
-        self._lock = threading.RLock()
 
     def scan(self):
         """Scan the network."""
-        with self._lock:
-            self.update()
+        self.update()
 
     def all(self):
         """Return all found entries.

netdisco/lms.py

@@ -1,6 +1,5 @@
 """Squeezebox/Logitech Media server discovery."""
 import socket
-import threading
 
 from .const import ATTR_HOST, ATTR_PORT
 
@@ -15,12 +14,10 @@ def __init__(self):
         """Initialize the Logitech discovery."""
         self.entries = []
         self.last_scan = None
-        self._lock = threading.RLock()
 
     def scan(self):
         """Scan the network."""
-        with self._lock:
-            self.update()
+        self.update()
 
     def all(self):
         """Scan and return all found entries."""