Created
August 10, 2010 07:56
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transfer simulator
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| #!/usr/bin/env python | |
| """ | |
| tap protocol client. | |
| Copyright (c) 2010 Dustin Sallings <dustin@spy.net> | |
| """ | |
| import sys | |
| import time | |
| import struct | |
| import signal | |
| import asyncore | |
| import mc_bin_client | |
| import tap | |
| from memcacheConstants import REQ_MAGIC_BYTE, RES_MAGIC_BYTE | |
| from memcacheConstants import REQ_PKT_FMT, RES_PKT_FMT, MIN_RECV_PACKET | |
| from memcacheConstants import SET_PKT_FMT, DEL_PKT_FMT, INCRDECR_RES_FMT | |
| import memcacheConstants | |
| VBUCKETS=list(range(16)) | |
| def setupVbuckets(tdesc): | |
| signal.alarm(5) | |
| mc = mc_bin_client.MemcachedClient(tdesc.host, tdesc.port) | |
| for i in VBUCKETS: | |
| print "Setting vbucket %d state to active." % i | |
| mc.set_vbucket_state(i, 'active') | |
| signal.alarm(0) | |
| def alarm_handler(*stuff): | |
| print "ALRM rang" | |
| signal.pause() | |
| class Handler(object): | |
| def __init__(self, myid): | |
| self.seen = 0 | |
| self.vbsets = 0 | |
| self.myid = myid | |
| def __call__(self, identifier, cmd, extra, key, vb, val, cas): | |
| signal.alarm(10) | |
| assert vb == self.myid | |
| if cmd in [memcacheConstants.CMD_TAP_VBUCKET_SET]: | |
| state = struct.unpack("!I", val)[0] | |
| print "vb set (%d):\t%s" % (self.myid, ["0", "active", "2", "pending"][state]) | |
| self.vbsets += 1 | |
| else: | |
| self.seen += 1 | |
| if __name__ == '__main__': | |
| signal.signal(signal.SIGALRM, alarm_handler) | |
| descriptors = [tap.TapDescriptor(a) for a in sys.argv[1:]] | |
| for i in range(1000): | |
| for tdesc in descriptors: | |
| setupVbuckets(tdesc) | |
| callbacks = [] | |
| for v in VBUCKETS: | |
| cb = Handler(v) | |
| callbacks.append(cb) | |
| opts = {memcacheConstants.TAP_FLAG_TAKEOVER_VBUCKETS: '', | |
| memcacheConstants.TAP_FLAG_LIST_VBUCKETS: [v]} | |
| tap.TapClient(descriptors, cb, opts=opts) | |
| asyncore.loop() | |
| print "Read %d items" % sum(cb.seen for cb in callbacks) | |
| assert sum(cb.vbsets for cb in callbacks) == len(VBUCKETS) * 2 | |
| signal.alarm(0) |
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