7 class Processor(threading.Thread):
11 threading.Thread.__init__(self)
13 self.request_queue = queue.Queue()
14 self.response_queue = queue.Queue()
15 self.internal_ids = {}
17 self.lock = threading.Lock()
19 def push_response(self, item):
20 self.response_queue.put(item)
22 def pop_response(self):
23 return self.response_queue.get()
25 def push_request(self, session, item):
26 self.request_queue.put((session,item))
28 def pop_request(self):
29 return self.request_queue.get()
31 def get_session_id(self, internal_id):
33 return session_ids.pop(internal_id)
35 def store_session_id(self, session, msgid):
37 self.internal_ids[self.internal_id] = session, msgid
41 if self.shared is None:
42 raise TypeError("self.shared not set in Processor")
43 while not self.shared.stopped():
44 session, request = self.pop_request()
46 method = request['method']
47 params = request.get('params',[])
49 if method in [ 'numblocks.subscribe', 'address.subscribe', 'server.peers']:
50 session.subscribe_to_service(method, params)
52 # store session and id locally
53 request['id'] = self.store_session_id(session, request['id'])
61 def process(self, request):
62 print "New request", request
65 # When ready, you call
66 # self.push_response(response)
72 def __init__(self, connection, address):
73 self._connection = connection
74 self.address = address
76 self.lock = threading.Lock()
77 self.subscriptions = []
78 print "new session", address
81 self._connection.close()
82 print "Terminating connection:", self.address[0]
92 raise Exception("Session was stopped")
94 return self._connection
96 def subscribe_to_service(self, method, params):
98 self.subscriptions.append((method, params))
102 class TcpResponder(threading.Thread):
104 def __init__(self, shared, processor, server):
106 self.processor = processor
108 threading.Thread.__init__(self)
112 while not self.shared.stopped():
113 response = self.processor.pop_response()
115 internal_id = response.get('id')
116 params = response.get('params',[])
118 method = response['method']
120 print "no method", response
124 session, message_id = self.processor.get_session_id(internal_id)
126 response['id'] = message_id
127 self.send_response(response, session)
130 for session in self.server.sessions:
131 if not session.stopped():
132 if (method,params) in session.subscriptions:
133 self.send_response(response, session)
137 def send_response(self, response, session):
138 raw_response = json.dumps(response)
139 # Possible race condition here by having session
141 # I assume Python connections are thread safe interfaces
143 connection = session.connection()
144 connection.send(raw_response + "\n")
148 class TcpClientRequestor(threading.Thread):
150 def __init__(self, shared, processor, session):
152 self.processor = processor
154 self.session = session
155 threading.Thread.__init__(self)
158 while not self.shared.stopped():
159 if not self.update():
166 data = self.receive()
177 return self.session.connection().recv(1024)
182 raw_buffer = self.message.find('\n')
186 raw_command = self.message[0:raw_buffer].strip()
187 self.message = self.message[raw_buffer + 1:]
188 if raw_command == 'quit':
193 command = json.loads(raw_command)
195 self.processor.push_response({"error": "bad JSON", "request": raw_command})
199 # Try to load vital fields, and return an error if
201 message_id = command['id']
202 method = command['method']
204 # Return an error JSON in response.
205 self.processor.push_response({"error": "syntax error", "request": raw_command})
207 self.processor.push_request(self.session,command)
211 class TcpServer(threading.Thread):
213 def __init__(self, shared, processor, host, port):
215 self.processor = processor
217 threading.Thread.__init__(self)
221 self.lock = threading.Lock()
224 print "TCP server started."
225 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
226 sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
227 sock.bind((self.host, self.port))
229 responder = TcpResponder(self.shared, self.processor, self)
231 while not self.shared.stopped():
232 session = Session(*sock.accept())
233 client_req = TcpClientRequestor(self.shared, self.processor, session)
235 self.add_session(session)
236 self.collect_garbage()
238 def add_session(self, session):
240 self.sessions.append(session)
242 def collect_garbage(self):
243 # Deep copy entire sessions list and blank it
244 # This is done to minimise lock contention
246 sessions = self.sessions[:]
248 for session in sessions:
249 if not session.stopped():
250 # If session is still alive then re-add it back
251 # to our internal register
252 self.add_session(session)
258 self.lock = threading.Lock()
259 self._stopped = False
262 print "Stopping Stratum"
272 def start(self, processor):
274 # Bind shared to processor since constructor is user defined
275 processor.shared = shared
277 # Create various transports we need
278 transports = TcpServer(shared, processor, "176.31.24.241", 50001),
279 for server in transports:
281 while not shared.stopped():
282 if raw_input() == "quit":
286 if __name__ == "__main__":
287 processor = Processor()