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Use stormed-amqp with tornado.web.RequestHandlers
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#!/usr/bin/env python | |
# tornadoweb_stormed.py | |
import logging | |
import sys | |
import stormed | |
import tornado.ioloop | |
import tornado.web | |
__author__ = 'Brian McFadden' | |
__email__ = 'brimcfadden@gmail.com' | |
HTML_HEADER = '<html><head><title>Tornado/Stormed RPC</title></head><body>' | |
HTML_FOOTER = '</body></html>' | |
class Fib(tornado.web.RequestHandler): | |
"""This handler implements rpc_client.py from stormed-amqp tutorial #6. | |
The RPC server must run simultaneously with this client. It is located at: | |
https://github.com/paolo-losi/stormed-amqp/blob/master/examples/tutorial6/rpc_server.py | |
Since the RPC server was not made to avoid blocking, try running several. | |
""" | |
@tornado.web.asynchronous | |
def get(self, number=''): | |
if not number: | |
self.redirect('/30') # GET / --> GET /30 | |
self.number = number | |
mq_conn = self.application.settings.get('mq_conn') | |
self.mq_ch = mq_conn.channel() | |
self.mq_ch.queue_declare(exclusive=True, | |
callback=self._on_q_declare) | |
def _on_q_declare(self, qinfo): | |
self.mq_ch.consume(qinfo.queue, self._on_mq_response) | |
self.corr_id = corr_id = str(id(self)) | |
msg = stormed.Message(str(self.number), delivery_mode=2, | |
reply_to=qinfo.queue, correlation_id=corr_id) | |
self.mq_ch.publish(msg, exchange='', routing_key='rpc_queue') | |
def _on_mq_response(self, response_msg): | |
self.write(HTML_HEADER) | |
self.write("fib({0}) = {1}".format(self.number, response_msg.body)) | |
print ' [x] Received "{0}"'.format(response_msg.body) | |
self.write(HTML_FOOTER) | |
self.finish() | |
def main(): | |
logging.basicConfig(level=logging.DEBUG) | |
mq_conn = stormed.Connection(host='localhost') | |
def on_connect(): | |
print 'Connected to AMQP broker.' | |
mq_conn.connect(on_connect) | |
application = tornado.web.Application( | |
[(r'/([0-9]*)', Fib)], | |
**{'mq_conn': mq_conn} | |
) | |
try: | |
port = int(sys.argv[1]) # $ python tornadoweb_stormed.py 80 | |
except: | |
port = 8080 | |
application.listen(port) | |
print "Tornado is serving on port {0}.".format(port) | |
tornado.ioloop.IOLoop.instance().start() | |
if __name__ == '__main__': | |
main() |
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