def commandReceived(self, ssn, message):
"""
Process incoming commands, coming in with session and message
information.
================= ==========================
Parameter Description
================= ==========================
ssn AMQP session object
message Received AMQP message
================= ==========================
Incoming messages are coming from an
:class:`clacks.common.components.amqp_proxy.AMQPServiceProxy` which
is providing a *reply to* queue as a return channel. The command
result is written to that queue.
"""
# Check for id
if not message.user_id:
raise ValueError(C.make_error("AMQP_MESSAGE_WITHOUT_UID"))
id_ = ''
name = args = err = res = None
try:
req = loads(message.content)
except ServiceRequestNotTranslatable, e:
err = str(e)
req = {'id': id_}
def process(self, req, environ):
"""
Process an incoming JSONRPC request and dispatch it thru the
*CommandRegistry*.
================= ==========================
Parameter Description
================= ==========================
req Incoming Request
environ WSGI environment
================= ==========================
``Return``: varries
"""
# Handle OPTIONS
if req.method == 'OPTIONS':
return Response(
server=self.ident,
allow='POST'
)
if not req.method == 'POST':
raise exc.HTTPMethodNotAllowed(
"Only POST allowed",
allow='POST').exception
try:
json = loads(req.body)
except ValueError, e:
raise ValueError(C.make_error("INVALID_JSON", data=str(e)))
def commandReceived(self, ssn, message):
"""
Process incoming commands, coming in with session and message
information.
================= ==========================
Parameter Description
================= ==========================
ssn AMQP session object
message Received AMQP message
================= ==========================
Incoming messages are coming from an
:class:`clacks.common.components.amqp_proxy.AMQPServiceProxy` which
is providing a *reply to* queue as a return channel. The command
result is written to that queue.
"""
err = None
res = None
id_ = ""
# Check for id
if not message.user_id:
raise Exception("incoming message without user_id")
# Check for reply_to
if not message.reply_to:
raise Exception("incoming message without reply_to")
try:
req = loads(message.content)
except ServiceRequestNotTranslatable, e:
err = str(e)
req = {"id": id_}
def __call__(self, *args, **kwargs):
if len(kwargs) > 0 and len(args) > 0:
raise JSONRPCException("JSON-RPC does not support positional and keyword arguments at the same time")
# Default to 'core' queue
queue = "core" #@UnusedVariable
if self.__methods:
if not self.__serviceName in self.__methods:
raise NameError("name '%s' not defined" % self.__serviceName)
if self.__domain:
queue = self.__methods[self.__serviceName]['target'] #@UnusedVariable
else:
queue = self.__serviceAddress #@UnusedVariable
# Find free session for requested queue
found = False
for sess, dsc in self.__worker[self.__serviceAddress].iteritems():
if not dsc['locked']:
self.__ssn = dsc['ssn']
self.__sender = dsc['sender']
self.__receiver = dsc['receiver']
self.__sess = sess
dsc['locked'] = True
found = True
break
# No free session?
if not found:
raise AMQPException('no free session - increase workers')
# Send
if len(kwargs):
postdata = dumps({"method": self.__serviceName, 'params': kwargs, 'id': 'jsonrpc'})
else:
postdata = dumps({"method": self.__serviceName, 'params': args, 'id': 'jsonrpc'})
message = Message(postdata)
message.user_id = self.__URL['user']
message.reply_to = 'reply-%s' % self.__ssn.name
self.__sender.send(message)
# Get response
respdata = self.__receiver.fetch()
resp = loads(respdata.content)
self.__ssn.acknowledge(respdata)
self.__worker[self.__serviceAddress][self.__sess]['locked'] = False
if resp['error'] != None:
raise JSONRPCException(resp['error'])
return resp['result']
def __call__(self, *args, **kwargs):
if len(kwargs) > 0 and len(args) > 0:
raise JSONRPCException("JSON-RPC does not support positional and keyword arguments at the same time")
if len(kwargs):
postdata = dumps({"method": self.__serviceName, 'params': kwargs, 'id': 'jsonrpc'})
else:
postdata = dumps({"method": self.__serviceName, 'params': args, 'id': 'jsonrpc'})
if self.__mode == 'POST':
respdata = self.__opener.open(self.__serviceURL, postdata).read()
else:
respdata = self.__opener.open(self.__serviceURL + "?" + quote(postdata)).read()
resp = loads(respdata)
if resp['error'] != None:
raise JSONRPCException(resp['error'])
return resp['result']
