annotate tests/test-batching.py @ 28945:05982f7ab231

py3: use absolute_import in revlog-formatv0.py
author Robert Stanca <robert.stanca7@gmail.com>
date Sat, 16 Apr 2016 05:33:23 +0300
parents 544908ae36ce
children e2fc2122029c
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1 # test-batching.py - tests for transparent command batching
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2 #
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3 # Copyright 2011 Peter Arrenbrecht <peter@arrenbrecht.ch>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import, print_function
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9
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10 from mercurial import (
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11 peer,
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12 wireproto,
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13 )
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14
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15 # equivalent of repo.repository
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16 class thing(object):
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17 def hello(self):
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18 return "Ready."
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19
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20 # equivalent of localrepo.localrepository
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21 class localthing(thing):
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22 def foo(self, one, two=None):
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23 if one:
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24 return "%s and %s" % (one, two,)
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25 return "Nope"
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26 def bar(self, b, a):
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27 return "%s und %s" % (b, a,)
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28 def greet(self, name=None):
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29 return "Hello, %s" % name
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30 def batch(self):
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31 '''Support for local batching.'''
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32 return peer.localbatch(self)
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33
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34 # usage of "thing" interface
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35 def use(it):
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36
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37 # Direct call to base method shared between client and server.
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38 print(it.hello())
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39
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40 # Direct calls to proxied methods. They cause individual roundtrips.
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41 print(it.foo("Un", two="Deux"))
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42 print(it.bar("Eins", "Zwei"))
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43
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44 # Batched call to a couple of (possibly proxied) methods.
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45 batch = it.batch()
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46 # The calls return futures to eventually hold results.
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47 foo = batch.foo(one="One", two="Two")
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48 foo2 = batch.foo(None)
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49 bar = batch.bar("Eins", "Zwei")
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50 # We can call non-batchable proxy methods, but the break the current batch
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51 # request and cause additional roundtrips.
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52 greet = batch.greet(name="John Smith")
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53 # We can also add local methods into the mix, but they break the batch too.
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54 hello = batch.hello()
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55 bar2 = batch.bar(b="Uno", a="Due")
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56 # Only now are all the calls executed in sequence, with as few roundtrips
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57 # as possible.
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58 batch.submit()
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59 # After the call to submit, the futures actually contain values.
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60 print(foo.value)
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61 print(foo2.value)
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62 print(bar.value)
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63 print(greet.value)
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64 print(hello.value)
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65 print(bar2.value)
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66
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67 # local usage
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68 mylocal = localthing()
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69 print()
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70 print("== Local")
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71 use(mylocal)
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72
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73 # demo remoting; mimicks what wireproto and HTTP/SSH do
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74
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75 # shared
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76
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77 def escapearg(plain):
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78 return (plain
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79 .replace(':', '::')
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80 .replace(',', ':,')
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81 .replace(';', ':;')
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82 .replace('=', ':='))
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83 def unescapearg(escaped):
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84 return (escaped
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85 .replace(':=', '=')
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86 .replace(':;', ';')
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87 .replace(':,', ',')
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88 .replace('::', ':'))
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89
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90 # server side
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91
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92 # equivalent of wireproto's global functions
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93 class server(object):
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94 def __init__(self, local):
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95 self.local = local
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96 def _call(self, name, args):
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97 args = dict(arg.split('=', 1) for arg in args)
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98 return getattr(self, name)(**args)
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99 def perform(self, req):
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100 print("REQ:", req)
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101 name, args = req.split('?', 1)
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102 args = args.split('&')
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103 vals = dict(arg.split('=', 1) for arg in args)
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104 res = getattr(self, name)(**vals)
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105 print(" ->", res)
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106 return res
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107 def batch(self, cmds):
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108 res = []
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109 for pair in cmds.split(';'):
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110 name, args = pair.split(':', 1)
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111 vals = {}
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112 for a in args.split(','):
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113 if a:
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114 n, v = a.split('=')
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115 vals[n] = unescapearg(v)
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116 res.append(escapearg(getattr(self, name)(**vals)))
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117 return ';'.join(res)
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118 def foo(self, one, two):
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119 return mangle(self.local.foo(unmangle(one), unmangle(two)))
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120 def bar(self, b, a):
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121 return mangle(self.local.bar(unmangle(b), unmangle(a)))
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122 def greet(self, name):
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123 return mangle(self.local.greet(unmangle(name)))
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124 myserver = server(mylocal)
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125
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126 # local side
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127
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128 # equivalent of wireproto.encode/decodelist, that is, type-specific marshalling
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129 # here we just transform the strings a bit to check we're properly en-/decoding
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130 def mangle(s):
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131 return ''.join(chr(ord(c) + 1) for c in s)
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132 def unmangle(s):
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133 return ''.join(chr(ord(c) - 1) for c in s)
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134
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135 # equivalent of wireproto.wirerepository and something like http's wire format
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136 class remotething(thing):
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137 def __init__(self, server):
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138 self.server = server
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139 def _submitone(self, name, args):
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140 req = name + '?' + '&'.join(['%s=%s' % (n, v) for n, v in args])
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141 return self.server.perform(req)
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142 def _submitbatch(self, cmds):
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143 req = []
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144 for name, args in cmds:
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145 args = ','.join(n + '=' + escapearg(v) for n, v in args)
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146 req.append(name + ':' + args)
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147 req = ';'.join(req)
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148 res = self._submitone('batch', [('cmds', req,)])
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149 return res.split(';')
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150
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151 def batch(self):
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152 return wireproto.remotebatch(self)
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153
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154 @peer.batchable
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155 def foo(self, one, two=None):
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156 if not one:
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157 yield "Nope", None
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158 encargs = [('one', mangle(one),), ('two', mangle(two),)]
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159 encresref = peer.future()
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160 yield encargs, encresref
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161 yield unmangle(encresref.value)
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162
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163 @peer.batchable
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164 def bar(self, b, a):
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165 encresref = peer.future()
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166 yield [('b', mangle(b),), ('a', mangle(a),)], encresref
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167 yield unmangle(encresref.value)
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168
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169 # greet is coded directly. It therefore does not support batching. If it
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170 # does appear in a batch, the batch is split around greet, and the call to
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171 # greet is done in its own roundtrip.
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172 def greet(self, name=None):
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173 return unmangle(self._submitone('greet', [('name', mangle(name),)]))
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174
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175 # demo remote usage
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176
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177 myproxy = remotething(myserver)
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178 print()
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179 print("== Remote")
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180 use(myproxy)