Improve ProcessManager to manage registerable named services.

[software/pymin.git] / pymin / services / dhcp / __init__.py

diff --git a/pymin/services/dhcp/__init__.py b/pymin/services/dhcp/__init__.py
index 0dcb0d4abe3bb920ec93efb4eea00b67a41c91b5..de1515b092c7955e4ee6970387f0545758693aea 100644 (file)
--- a/pymin/services/dhcp/__init__.py
+++ b/pymin/services/dhcp/__init__.py
@@ -5,56 +5,10 @@ from os import path
 from pymin.seqtools import Sequence
 from pymin.dispatcher import Handler, handler, HandlerError
 from pymin.services.util import Restorable, ConfigWriter, InitdHandler, \
-                                TransactionalHandler, ParametersHandler
-
-__ALL__ = ('DhcpHandler', 'Error', 'HostError', 'HostAlreadyExistsError',
-            'HostNotFoundError')
-
-class Error(HandlerError):
-    r"""
-    Error(message) -> Error instance :: Base DhcpHandler exception class.
-
-    All exceptions raised by the DhcpHandler inherits from this one, so you can
-    easily catch any DhcpHandler exception.
-
-    message - A descriptive error message.
-    """
-    pass
-
-class HostError(Error, KeyError):
-    r"""
-    HostError(hostname) -> HostError instance
-
-    This is the base exception for all host related errors.
-    """
-
-    def __init__(self, hostname):
-        r"Initialize the object. See class documentation for more info."
-        self.message = u'Host error: "%s"' % hostname
-
-class HostAlreadyExistsError(HostError):
-    r"""
-    HostAlreadyExistsError(hostname) -> HostAlreadyExistsError instance
-
-    This exception is raised when trying to add a hostname that already exists.
-    """
-
-    def __init__(self, hostname):
-        r"Initialize the object. See class documentation for more info."
-        self.message = u'Host already exists: "%s"' % hostname
-
-class HostNotFoundError(HostError):
-    r"""
-    HostNotFoundError(hostname) -> HostNotFoundError instance
-
-    This exception is raised when trying to operate on a hostname that doesn't
-    exists.
-    """
-
-    def __init__(self, hostname):
-        r"Initialize the object. See class documentation for more info."
-        self.message = u'Host not found: "%s"' % hostname
+                                TransactionalHandler, ParametersHandler, \
+                                DictSubHandler, ReloadHandler
 
+__ALL__ = ('DhcpHandler',)
 
 class Host(Sequence):
     r"""Host(name, ip, mac) -> Host instance :: Class representing a host.
@@ -74,65 +28,26 @@ class Host(Sequence):
         r"Return a tuple representing the host."
         return (self.name, self.ip, self.mac)
 
-class HostHandler(Handler):
-    r"""HostHandler(hosts) -> HostHandler instance :: Handle a list of hosts.
+    def update(self, ip=None, mac=None):
+        if ip is not None:
+            self.ip = ip
+        if mac is not None:
+            self.mac = mac
+
+class HostHandler(DictSubHandler):
+    r"""HostHandler(parent) -> HostHandler instance :: Handle a list of hosts.
 
     This class is a helper for DhcpHandler to do all the work related to hosts
     administration.
-
-    hosts - A dictionary with string keys (hostnames) and Host instances values.
     """
 
     handler_help = u"Manage DHCP hosts"
 
-    def __init__(self, hosts):
-        r"Initialize HostHandler object, see class documentation for details."
-        self.hosts = hosts
-
-    @handler(u'Add a new host')
-    def add(self, name, ip, mac):
-        r"add(name, ip, mac) -> None :: Add a host to the hosts list."
-        if name in self.hosts:
-            raise HostAlreadyExistsError(name)
-        self.hosts[name] = Host(name, ip, mac)
-
-    @handler(u'Update a host')
-    def update(self, name, ip=None, mac=None):
-        r"update(name[, ip[, mac]]) -> None :: Update a host of the hosts list."
-        if not name in self.hosts:
-            raise HostNotFoundError(name)
-        if ip is not None:
-            self.hosts[name].ip = ip
-        if mac is not None:
-            self.hosts[name].mac = mac
-
-    @handler(u'Delete a host')
-    def delete(self, name):
-        r"delete(name) -> None :: Delete a host of the hosts list."
-        if not name in self.hosts:
-            raise HostNotFoundError(name)
-        del self.hosts[name]
-
-    @handler(u'Get information about a host')
-    def get(self, name):
-        r"get(name) -> Host :: List all the information of a host."
-        if not name in self.hosts:
-            raise HostNotFoundError(name)
-        return self.hosts[name]
-
-    @handler(u'List hosts')
-    def list(self):
-        r"list() -> tuple :: List all the hostnames."
-        return self.hosts.keys()
-
-    @handler(u'Get information about all hosts')
-    def show(self):
-        r"show() -> list of Hosts :: List all the complete hosts information."
-        return self.hosts.values()
-
-
-class DhcpHandler(Restorable, ConfigWriter, InitdHandler, TransactionalHandler,
-                  ParametersHandler):
+    _cont_subhandler_attr = 'hosts'
+    _cont_subhandler_class = Host
+
+class DhcpHandler(Restorable, ConfigWriter, ReloadHandler, TransactionalHandler,
+                  ParametersHandler, InitdHandler):
     r"""DhcpHandler([pickle_dir[, config_dir]]) -> DhcpHandler instance.
 
     Handles DHCP service commands for the dhcpd program.
@@ -172,8 +87,8 @@ class DhcpHandler(Restorable, ConfigWriter, InitdHandler, TransactionalHandler,
         self._persistent_dir = pickle_dir
         self._config_writer_cfg_dir = config_dir
         self._config_build_templates()
-        self._restore()
-        self.host = HostHandler(self.hosts)
+        InitdHandler.__init__(self)
+        self.host = HostHandler(self)
 
     def _get_config_vars(self, config_file):
         return dict(hosts=self.hosts.values(), **self.params)