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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
import sys
import socket
import os
import logging
from threading import Thread
from qpid.messaging import Connection, Message
from uuid import uuid4
from qmfCommon import (AMQP_QMF_TOPIC, AMQP_QMF_DIRECT, AMQP_QMF_AGENT_LOCATE,
AMQP_QMF_AGENT_INDICATION, AgentId, QmfManaged)
##==============================================================================
## AGENT
##==============================================================================
class Agent(Thread):
def __init__(self, vendor, product, name=None,
notifier=None, kwargs={}):
Thread.__init__(self)
self._running = False
self.vendor = vendor
self.product = product
if name:
self.name = name
else:
self.name = uuid4().get_urn().split(":")[2]
self._id = AgentId(self.vendor, self.product, self.name)
self._address = str(self._id)
self._notifier = notifier
self._conn = None
def getAgentId(self):
return AgentId(self.vendor, self.product, self.name)
def setConnection(self, conn):
self._conn = conn
self._session = self._conn.session()
self._locate_receiver = self._session.receiver(AMQP_QMF_AGENT_LOCATE)
self._direct_receiver = self._session.receiver(AMQP_QMF_DIRECT + "/" + self._address)
self._ind_sender = self._session.sender(AMQP_QMF_AGENT_INDICATION)
self._running = True
self._start()
def _dispatch(self, msg):
if msg.subject != "qmf4":
logging.debug("Ignoring non-qmf message '%s'" % msg.subject)
return
cmap = {}
if msg.content_type == "amqp/map":
cmap = msg.content
if (not msg.properties or
not "method" in msg.properties or
not "opcode" in msg.properties):
logging.error("INVALID MESSAGE PROPERTIES: '%s'" % str(msg.properties))
return
if msg.properties["method"] == "request":
if msg.properties["opcode"] == "agent-locate":
if "query" in cmap:
query = cmap["query"]
if ("vendor" in query and (query["vendor"] == "*" or query["vendor"] == self.vendor) and
"product" in query and (query["product"] == "*" or query["product"] == self.product) and
"name" in query and (query["name"] == "*" or query["name"] == self.name)):
logging.debug("Query received for %s:%s:%s" % (self.vendor, self.product, self.name))
logging.debug("reply-to [%s], cid=%s" % (msg.reply_to, msg.correlation_id))
try:
tmp_snd = self.session.sender( msg.reply_to )
m = Message( subject="qmf4",
properties={"method":"response",
"opcode":"agent"},
content={"name": {"vendor":"redhat.com",
"product":"agent",
"name":"tross"}},
correlation_id=msg.correlation_id)
tmp_snd.send(m)
logging.debug("reply-to [%s] sent" % msg.reply_to)
except e:
logging.error("Failed to send reply to msg '%s'" % str(e))
else:
logging.warning("Ignoring message with unrecognized 'opcode' value: '%s'"
% msg.properties["opcode"])
else:
logging.warning("Ignoring message with unrecognized 'method' value: '%s'"
% msg.properties["method"] )
def run(self):
count = 0 # @todo: hack
while self._running:
try:
msg = self._locate_receiver.fetch(1)
if msg.content_type == "amqp/map":
self._dispatch(msg)
except KeyboardInterrupt:
break
except:
pass
try:
msg = self._direct_receiver.fetch(1)
if msg.content_type == "amqp/map":
self._dispatch(msg)
except KeyboardInterrupt:
break
except:
pass
count+= 1
if count == 5:
count = 0
m = Message( subject="qmf4",
properties={"method":"indication",
"opcode":"agent"},
content={"name": {"vendor":"redhat.com",
"product":"agent",
"name":"tross"}} )
self.ind_sender.send(m)
logging.info("Agent Indication Sent")
def registerObjectClass(self, cls):
logging.error("!!!Agent.registerObjectClass() TBD!!!")
def registerEventClass(self, cls):
logging.error("!!!Agent.registerEventClass() TBD!!!")
def raiseEvent(self, qmfEvent):
logging.error("!!!Agent.raiseEvent() TBD!!!")
def addObject(self, qmfAgentData ):
logging.error("!!!Agent.addObject() TBD!!!")
def methodResponse(self, context, status, text, arguments):
logging.error("!!!Agent.methodResponse() TBD!!!")
def getWorkItemCount(self):
"""
Returns the count of pending WorkItems that can be retrieved.
"""
logging.error("!!!Agent.getWorkItemCount() TBD!!!")
def getNextWorkItem(self, timeout=None):
"""
Obtains the next pending work item, or None if none available.
"""
logging.error("!!!Agent.getNextWorkItem() TBD!!!")
def releaseWorkItem(self, wi):
"""
Releases a WorkItem instance obtained by getNextWorkItem(). Called when
the application has finished processing the WorkItem.
"""
logging.error("!!!Agent.releaseWorkItem() TBD!!!")
##==============================================================================
## OBJECTS
##==============================================================================
class QmfAgentData(QmfManaged):
"""
A managed data object that is owned by an agent.
"""
def __init__(self, _agent, _schema, _props={}):
"""
@type _agent: class Agent
@param _agent: the agent that manages this object.
@type _schema: class SchemaObjectClass
@param _schema: the schema used to describe this data object
@type _props: map of "name"=<value> pairs
@param _props: initial values for all properties in this object
"""
super(QmfAgentData, self).__init__(_agentId=_agent.getAgentId(),
_schema=_schema,
_props=_props)
def destroy(self):
self._timestamps[QmfManaged._ts_delete] = long(time.time() * 1000)
# @todo: publish change
def setProperty( self, _name, _value):
super(QmfAgentData, self).setProperty(_name, _value)
# @todo: publish change
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