Improve vrrp restorable defaults readability.

[software/pymin.git] / pymin / pymindaemon.py

diff --git a/pymin/pymindaemon.py b/pymin/pymindaemon.py
index be2c9750d29339d7b79d696bdf6218898ed267c8..3881857ea29c93d8276e5af33667900a08c1f510 100644 (file)
--- a/pymin/pymindaemon.py
+++ b/pymin/pymindaemon.py
@@ -11,56 +11,73 @@ command-line.
 import signal
 import socket
 
+from pymin.dispatcher import handler
+from pymin import dispatcher
 from pymin import eventloop
 from pymin import serializer
+from pymin import procman
 
 class PyminDaemon(eventloop.EventLoop):
-    r"""PyminDaemon(bind_addr, routes) -> PyminDaemon instance
+    r"""PyminDaemon(root, bind_addr) -> PyminDaemon instance
 
     This class is well suited to run as a single process. It handles
     signals for controlled termination (SIGINT and SIGTERM), as well as
     a user signal to reload the configuration files (SIGUSR1).
 
-    bind_addr - is a tuple of (ip, port) where to bind the UDP socket to.
+    root - the root handler. This is passed directly to the Dispatcher.
 
-    routes - is a dictionary where the key is a command string and the value
-             is the command handler. This is passed directly to the Dispatcher.
+    bind_addr - is a tuple of (ip, port) where to bind the UDP socket to.
 
     Here is a simple usage example:
 
-    >>> def test_handler(*args): print 'test:', args
-    >>> PyminDaemon(('', 9999), dict(test=test_handler)).run()
+    >>> from pymin import dispatcher
+    >>> class Root(dispatcher.Handler):
+            @handler('Test command.')
+            def test(self, *args):
+                print 'test:', args
+    >>> PyminDaemon(Root(), ('', 9999)).run()
     """
 
-    def __init__(self, routes=dict(), bind_addr=('', 9999)):
+    def __init__(self, root, bind_addr=('', 9999), timer=1):
         r"""Initialize the PyminDaemon object.
 
         See PyminDaemon class documentation for more info.
         """
+        # Timer timeout time
+        self.timer = timer
         # Create and bind socket
         sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
         sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         sock.bind(bind_addr)
-        # Create EventLoop
-        eventloop.EventLoop.__init__(self, sock)
-        # Create Dispatcher
-        self.dispatcher = Dispatcher(routes)
         # Signal handling
-        def quit(signum, frame):
+        def quit(loop, signum):
             print "Shuting down ..."
-            self.stop() # tell main event loop to stop
-        def reload_config(signum, frame):
+            loop.stop() # tell main event loop to stop
+        def reload_config(loop, signum):
             print "Reloading configuration..."
             # TODO iterate handlers list propagating reload action
-        signal.signal(signal.SIGINT, quit)
-        signal.signal(signal.SIGTERM, quit)
-        signal.signal(signal.SIGUSR1, reload_config)
+        def timer(loop, signum):
+            loop.handle_timer()
+            signal.alarm(loop.timer)
+        def child(loop, signum):
+            procman.sigchild_handler(signum)
+        # Create EventLoop
+        eventloop.EventLoop.__init__(self, sock, signals={
+                signal.SIGINT: quit,
+                signal.SIGTERM: quit,
+                signal.SIGUSR1: reload_config,
+                signal.SIGALRM: timer,
+                signal.SIGCHLD: child,
+            })
+        # Create Dispatcher
+        #TODO root.pymin = PyminHandler()
+        self.dispatcher = dispatcher.Dispatcher(root)
 
     def handle(self):
         r"handle() -> None :: Handle incoming events using the dispatcher."
         (msg, addr) = self.file.recvfrom(65535)
         try:
-            result = self.dispatcher.dispatch(msg)
+            result = self.dispatcher.dispatch(unicode(msg, 'utf-8'))
             if result is not None:
                 result = serializer.serialize(result)
             response = u'OK '
@@ -76,10 +93,18 @@ class PyminDaemon(eventloop.EventLoop):
             response += u'0\n'
         else:
             response += u'%d\n%s' % (len(result), result)
-        self.file.sendto(response, addr)
+        self.file.sendto(response.encode('utf-8'), addr)
+
+    def handle_timer(self):
+        r"handle_timer() -> None :: Call handle_timer() on handlers."
+        self.dispatcher.root.handle_timer()
 
     def run(self):
         r"run() -> None :: Run the event loop (shortcut to loop())"
+        # Start the timer
+        self.handle_timer()
+        signal.alarm(self.timer)
+        # Loop
         try:
             return self.loop()
         except eventloop.LoopInterruptedError, e:
@@ -87,14 +112,14 @@ class PyminDaemon(eventloop.EventLoop):
 
 if __name__ == '__main__':
 
-    @handler(u"Print all the arguments, return nothing.")
-    def test_handler(*args):
-        print 'test:', args
-
-    @handler(u"Echo the message passed as argument.")
-    def echo_handler(message):
-        print 'echo:', message
-        return message
+    class Root(dispatcher.Handler):
+        @handler(u"Print all the arguments, return nothing.")
+        def test(self, *args):
+            print 'test:', args
+        @handler(u"Echo the message passed as argument.")
+        def echo(self, message):
+            print 'echo:', message
+            return message
 
-    PyminDaemon(dict(test=test_handler, echo=echo_handler)).run()
+    PyminDaemon(Root()).run()