Revision 112d240d
| b/lib/daemon.py | ||
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| 22 | 22 |
"""Module with helper classes and functions for daemons""" |
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|
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import asyncore |
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import os |
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import select |
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import signal |
| ... | ... | |
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"""Constructs a new Mainloop instance. |
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|
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""" |
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self._io_wait = {}
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self._signal_wait = [] |
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self._poller = select.poll() |
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|
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@utils.SignalHandled([signal.SIGCHLD]) |
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@utils.SignalHandled([signal.SIGTERM]) |
| ... | ... | |
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if stop_on_empty and not (self._io_wait): |
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break |
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# Wait for I/O events |
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try: |
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io_events = self._poller.poll(None) |
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except select.error, err: |
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# EINTR can happen when signals are sent |
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if err.args and err.args[0] in (errno.EINTR,): |
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io_events = None |
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else: |
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raise |
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if io_events: |
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# Check for I/O events |
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for (evfd, evcond) in io_events: |
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owner = self._io_wait.get(evfd, None) |
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if owner: |
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owner.OnIO(evfd, evcond) |
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asyncore.loop(timeout=5, count=1, use_poll=True) |
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|
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# Check whether a signal was raised |
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for sig in signal_handlers: |
| ... | ... | |
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for owner in self._signal_wait: |
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owner.OnSignal(signal.SIGCHLD) |
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def RegisterIO(self, owner, fd, condition): |
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"""Registers a receiver for I/O notifications |
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The receiver must support a "OnIO(self, fd, conditions)" function. |
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@type owner: instance |
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@param owner: Receiver |
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@type fd: int |
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@param fd: File descriptor |
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@type condition: int |
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@param condition: ORed field of conditions to be notified |
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(see select module) |
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""" |
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# select.Poller also supports file() like objects, but we don't. |
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assert isinstance(fd, (int, long)), \ |
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"Only integers are supported for file descriptors" |
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self._io_wait[fd] = owner |
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self._poller.register(fd, condition) |
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|
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def RegisterSignal(self, owner): |
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"""Registers a receiver for signal notifications |
| 127 | 90 |
|
| b/lib/http/server.py | ||
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| 30 | 30 |
import socket |
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import time |
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import signal |
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import asyncore |
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|
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from ganeti import http |
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|
| ... | ... | |
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""" |
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return self.error_message_format % values |
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class HttpServer(http.HttpBase): |
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class HttpServer(http.HttpBase, asyncore.dispatcher):
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"""Generic HTTP server class |
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|
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Users of this class must subclass it and override the HandleRequest function. |
| ... | ... | |
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|
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""" |
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http.HttpBase.__init__(self) |
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asyncore.dispatcher.__init__(self) |
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|
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if request_executor_class is None: |
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self.request_executor = HttpServerRequestExecutor |
| ... | ... | |
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
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|
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self._children = [] |
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|
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mainloop.RegisterIO(self, self.socket.fileno(), select.POLLIN)
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self.set_socket(self.socket) |
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self.accepting = True
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mainloop.RegisterSignal(self) |
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|
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def Start(self): |
| ... | ... | |
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def Stop(self): |
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self.socket.close() |
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def OnIO(self, fd, condition): |
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if condition & select.POLLIN: |
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self._IncomingConnection() |
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def handle_accept(self): |
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self._IncomingConnection() |
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|
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def OnSignal(self, signum): |
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if signum == signal.SIGCHLD: |
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