545e6b6bb0
Story: 2008529 Task: 41688 Signed-off-by: Bin Yang <bin.yang@windriver.com> Change-Id: Ib276520605cc624a9976f804a1721ba2c5909403
110 lines
4.4 KiB
Python
110 lines
4.4 KiB
Python
import os
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import json
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import time
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import oslo_messaging
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from oslo_config import cfg
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from notificationclientsdk.common.helpers import rpc_helper
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from notificationclientsdk.model.dto.rpc_endpoint import RpcEndpointInfo
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import logging
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LOG = logging.getLogger(__name__)
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from notificationclientsdk.common.helpers import log_helper
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log_helper.config_logger(LOG)
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class BrokerClientBase(object):
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def __init__(self, broker_name, broker_transport_endpoint):
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self.broker_name = broker_name
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self.listeners = {}
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self.broker_endpoint = RpcEndpointInfo(broker_transport_endpoint)
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self.transport = rpc_helper.get_transport(self.broker_endpoint)
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LOG.debug("Created Broker client:{0}".format(broker_name))
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def __del__(self):
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self.transport.cleanup()
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del self.transport
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return
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def __create_listener(self, context):
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target = oslo_messaging.Target(
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topic=context['topic'],
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server=context['server'])
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endpoints = context['endpoints']
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server = oslo_messaging.get_rpc_server(
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self.transport, target, endpoints, executor=None)
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return server
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def _refresh(self):
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for topic, servers in self.listeners.items():
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for servername, context in servers.items():
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try:
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rpcserver = context.get('rpcserver', None)
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isactive = context.get('active', False)
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if isactive and not rpcserver:
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rpcserver = self.__create_listener(context)
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rpcserver.start()
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context['rpcserver'] = rpcserver
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LOG.debug("Started rpcserver@{0}@{1}".format(context['topic'], context['server']))
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elif not isactive and rpcserver:
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rpcserver.stop()
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rpcserver.wait()
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context.pop('rpcserver')
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LOG.debug("Stopped rpcserver@{0}@{1}".format(context['topic'], context['server']))
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except:
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LOG.error("Failed to update listener for topic/server:{0}/{1}"
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.format(topic, servername))
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continue
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def add_listener(self, topic, server, listener_endpoints=None):
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context = self.listeners.get(topic,{}).get(server, {})
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if not context:
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context = {
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'endpoints': listener_endpoints,
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'topic': topic,
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'server': server,
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'active': True
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}
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if not self.listeners.get(topic, None):
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self.listeners[topic] = {}
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self.listeners[topic][server] = context
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else:
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context['endpoints'] = listener_endpoints
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context['active'] = True
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self._refresh()
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def remove_listener(self, topic, server):
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context = self.listeners.get(topic,{}).get(server, {})
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if context:
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context['active'] = False
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self._refresh()
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def is_listening(self, topic, server):
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context = self.listeners.get(topic,{}).get(server, {})
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return context.get('active', False)
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def any_listener(self):
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for topic, servers in self.listeners.items():
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for servername, context in servers.items():
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isactive = context.get('active', False)
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if isactive:
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return True
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return False
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def call(self, topic, server, api_name, timeout=None, retry=None, **api_kwargs):
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target = oslo_messaging.Target(
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topic=topic, server=server, version=self.broker_endpoint.Version,
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namespace=self.broker_endpoint.Namespace)
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# note: the call might stuck here on 'Connection failed' and retry forever
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# due to the tcp connection is unreachable: 'AMQP server on <broker host>:<port> is unreachable: timed out'
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queryclient = oslo_messaging.RPCClient(self.transport, target, timeout = timeout, retry = retry)
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return queryclient.call({}, api_name, **api_kwargs)
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def cast(self, topic, api_name, timeout=None, retry=None, **api_kwargs):
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target = oslo_messaging.Target(
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topic=topic, fanout=True, version=self.broker_endpoint.Version,
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namespace=self.broker_endpoint.Namespace)
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queryclient = oslo_messaging.RPCClient(self.transport, target, timeout = timeout, retry = retry)
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queryclient.cast({}, api_name, **api_kwargs)
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