Handler instances dispatch logging events to specific destinations. The base handler class. Acts as a placeholder which defines the Handler interface. Handlers can optionally use Formatter instances to format records as desired. By default, no formatter is specified; in this case,
| 920 | |
| 921 | |
| 922 | class Handler(Filterer): |
| 923 | """ |
| 924 | Handler instances dispatch logging events to specific destinations. |
| 925 | |
| 926 | The base handler class. Acts as a placeholder which defines the Handler |
| 927 | interface. Handlers can optionally use Formatter instances to format |
| 928 | records as desired. By default, no formatter is specified; in this case, |
| 929 | the 'raw' message as determined by record.message is logged. |
| 930 | """ |
| 931 | def __init__(self, level=NOTSET): |
| 932 | """ |
| 933 | Initializes the instance - basically setting the formatter to None |
| 934 | and the filter list to empty. |
| 935 | """ |
| 936 | Filterer.__init__(self) |
| 937 | self._name = None |
| 938 | self.level = _checkLevel(level) |
| 939 | self.formatter = None |
| 940 | self._closed = False |
| 941 | # Add the handler to the global _handlerList (for cleanup on shutdown) |
| 942 | _addHandlerRef(self) |
| 943 | self.createLock() |
| 944 | |
| 945 | def get_name(self): |
| 946 | return self._name |
| 947 | |
| 948 | def set_name(self, name): |
| 949 | with _lock: |
| 950 | if self._name in _handlers: |
| 951 | del _handlers[self._name] |
| 952 | self._name = name |
| 953 | if name: |
| 954 | _handlers[name] = self |
| 955 | |
| 956 | name = property(get_name, set_name) |
| 957 | |
| 958 | def createLock(self): |
| 959 | """ |
| 960 | Acquire a thread lock for serializing access to the underlying I/O. |
| 961 | """ |
| 962 | self.lock = threading.RLock() |
| 963 | _register_at_fork_reinit_lock(self) |
| 964 | |
| 965 | def _at_fork_reinit(self): |
| 966 | self.lock._at_fork_reinit() |
| 967 | |
| 968 | def acquire(self): |
| 969 | """ |
| 970 | Acquire the I/O thread lock. |
| 971 | """ |
| 972 | if self.lock: |
| 973 | self.lock.acquire() |
| 974 | |
| 975 | def release(self): |
| 976 | """ |
| 977 | Release the I/O thread lock. |
| 978 | """ |
| 979 | if self.lock: |