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import json
import uuid
import tornado.ioloop
import tornado.stack_context
from imc import nonblock
class Connection:
def __init__(self,linkid):
self.linkid = linkid
self._close_callback = []
def send_msg(self,data):
pass
def start_recvloop(self,recvloop_callback):
pass
def add_close_callback(self,callback):
self._close_callback.append(tornado.stack_context.wrap(callback))
def close(self):
for callback in self._close_callback:
callback(self)
class Proxy:
def __init__(self,linkid):
self._ioloop = tornado.ioloop.IOLoop.instance()
self._linkid = linkid
self._conn_linkidmap = {}
self._caller_retidmap = {self._linkid:{}}
self._retcall_retidmap = {}
self._call_pathmap = {}
self.MSGTYPE_CALL = 'call'
self.MSGTYPE_RET = 'ret'
self.RETTYPE_GENID = 'genid'
self._check_waitcaller_timer = tornado.ioloop.PeriodicCallback(self._check_waitcaller,1000)
self._check_waitcaller_timer.start()
Proxy.instance = self
def add_conn(self,conn):
self._conn_linkidmap[conn.linkid] = conn
self._caller_retidmap[conn.linkid] = {}
conn.add_close_callback(self._conn_close_cb)
conn.start_recvloop(self._recvloop_dispatch)
def del_conn(self,conn):
wait_map = self._caller_retidmap[conn.linkid]
wait_retids = wait_map.keys()
for retid in wait_retids:
wait_map[retid]['fail_callback'](retid,'Eclose')
del self._conn_linkidmap[conn.linkid]
del self._caller_retidmap[conn.linkid]
def get_conn(self,linkid):
if linkid not in self._conn_linkidmap:
return None
return self._conn_linkidmap[linkid]
def request_conn(self,linkid,callback):
self._route_call()
def register_call(self,path,func_name,func):
self._call_pathmap[''.join([path,'/',func_name])] = func
def call(self,caller_genid,timeout,iden,dst,func_name,param):
caller_retid = ''.join([self._linkid,'/',self.RETTYPE_GENID,'_',caller_genid])
self._route_call(caller_retid,timeout,iden,dst,func_name,param)
def _route_call(self,caller_retid,timeout,iden,dst,func_name,param):
def __add_wait_caller(callee_linkid,caller_retid,timeout,fail_callback):
self._caller_retidmap[callee_linkid][caller_retid] = {
'timeout':timeout,
'fail_callback':tornado.stack_context.wrap(fail_callback)
}
def __add_wait_retcall(callee_retid,caller_linkid,caller_retid):
self._retcall_retidmap[callee_retid] = {
'caller_linkid':caller_linkid,
'caller_retid':caller_retid,
}
def __local_fail_cb(retid,err):
self._ret_call(self._linkid,retid,(False,err))
def __remote_fail_cb(retid,err):
print('Opps')
dst_part = dst.split('/')[1:]
linkid = dst_part[1]
path = ''.join(dst_part[2:])
caller_linkid = iden
assert caller_retid.split('/',1)[0] == caller_linkid
if linkid == self._linkid:
try:
stat,data = self._call_pathmap[''.join([path,'/',func_name])](param)
except KeyError:
raise
if stat == True:
if caller_linkid == self._linkid:
self._ioloop.add_callback(self._ret_call,caller_linkid,caller_retid,(True,data))
else:
caller_conn = self.get_conn(caller_linkid)
if caller_conn == None:
pass
self._send_msg_ret(caller_conn,caller_linkid,caller_retid,(True,data))
else:
if caller_linkid == self._linkid:
__add_wait_caller(linkid,caller_retid,timeout,__local_fail_cb)
else:
__add_wait_caller(linkid,caller_retid,timeout,__remote_fail_cb)
__add_wait_retcall(''.join([self._linkid,'/',self.RETTYPE_GENID,'_',data]),caller_linkid,caller_retid)
else:
callee_conn = self.get_conn(linkid)
if callee_conn == None:
pass
if caller_linkid == self._linkid:
__add_wait_caller(callee_conn.linkid,caller_retid,timeout,__local_fail_cb)
self._send_msg_call(callee_conn,caller_retid,timeout,iden,dst,func_name,param)
else:
pass
def _ret_call(self,caller_linkid,caller_retid,retvalue):
if caller_linkid == self._linkid:
part = caller_retid.split('/',1)[1].split('_')
ret_type = part[0]
retid = part[1]
if ret_type == self.RETTYPE_GENID:
stat,data = nonblock.retcall(retid,retvalue)
if stat == True:
try:
ret = self._retcall_retidmap.pop(caller_retid)
linkid = ret['caller_linkid']
retid = ret['caller_retid']
del self._caller_retidmap[caller_linkid][retid]
self._ret_call(linkid,retid,data)
except KeyError:
pass
else:
caller_conn = self.get_conn(caller_linkid)
if caller_conn == None:
pass
self._send_msg_ret(caller_conn,caller_linkid,caller_retid,retvalue)
def _recvloop_dispatch(self,conn,data):
msg = json.loads(data.decode('utf-8'))
msg_type = msg['type']
if msg_type == self.MSGTYPE_CALL:
self._recv_msg_call(conn,msg)
elif msg_type == self.MSGTYPE_RET:
self._recv_msg_ret(conn,msg)
def _conn_close_cb(self,conn):
self.del_conn(conn)
print('connection close')
def _check_waitcaller(self):
wait_maps = self._caller_retidmap.values()
for wait_map in wait_maps:
wait_retids = wait_map.keys()
wait_del = []
for retid in wait_retids:
wait = wait_map[retid]
wait['timeout'] -= 1000
if wait['timeout'] <= 0:
wait['fail_callback'](retid,'Etimeout')
wait_del.append(retid)
for retid in wait_del:
del wait_map[retid]
def _send_msg_call(self,conn,caller_retid,timeout,iden,dst,func_name,param):
msg = {
'type':self.MSGTYPE_CALL,
'caller_retid':caller_retid,
'timeout':timeout,
'iden':iden,
'dst':dst,
'func_name':func_name,
'param':param
}
conn.send_msg(bytes(json.dumps(msg),'utf-8'))
def _recv_msg_call(self,conn,msg):
caller_retid = msg['caller_retid']
timeout = msg['timeout']
iden = msg['iden']
dst = msg['dst']
func_name = msg['func_name']
param = msg['param']
self._route_call(caller_retid,timeout,iden,dst,func_name,param)
def _send_msg_ret(self,conn,caller_linkid,caller_retid,retvalue):
msg = {
'type':self.MSGTYPE_RET,
'caller_linkid':caller_linkid,
'caller_retid':caller_retid,
'retvalue':retvalue
}
conn.send_msg(bytes(json.dumps(msg),'utf-8'))
def _recv_msg_ret(self,conn,msg):
caller_linkid = msg['caller_linkid']
caller_retid = msg['caller_retid']
retvalue = msg['retvalue']
if caller_linkid == self._linkid:
try:
del self._caller_retidmap[conn.linkid][caller_retid]
self._ret_call(caller_linkid,caller_retid,retvalue)
except KeyError:
pass
else:
pass
@nonblock.call
def imc_call(iden,dst,func_name,param,_genid):
Proxy.instance.call(_genid,5000,iden,dst,func_name,param)
def imc_register_call(path,func_name,func):
Proxy.instance.register_call(path,func_name,func)
|
