Mercurial > hg
annotate tests/test-batching.py @ 37615:f3dc8239e3a9
peer: scatter module to the wind (API)
peer.py hardly contained any code. The code it did contain was
generic to the version 1 peer interface or specific to the
local repository peer.
So code has been moved to wireprotov1peer and localrepo, as
appropriate.
Differential Revision: https://phab.mercurial-scm.org/D3260
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 11 Apr 2018 12:51:09 -0700 |
parents | a81d02ea65db |
children | 33a6eee08db2 |
rev | line source |
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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 error, |
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12 localrepo, |
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13 util, |
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14 wireprotov1peer, |
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15 |
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16 ) |
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17 |
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18 # equivalent of repo.repository |
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19 class thing(object): |
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20 def hello(self): |
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21 return "Ready." |
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22 |
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23 # equivalent of localrepo.localrepository |
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24 class localthing(thing): |
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25 def foo(self, one, two=None): |
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26 if one: |
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27 return "%s and %s" % (one, two,) |
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28 return "Nope" |
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29 def bar(self, b, a): |
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30 return "%s und %s" % (b, a,) |
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31 def greet(self, name=None): |
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32 return "Hello, %s" % name |
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33 def batchiter(self): |
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34 '''Support for local batching.''' |
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35 return localrepo.localiterbatcher(self) |
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36 |
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37 # usage of "thing" interface |
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38 def use(it): |
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39 |
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40 # Direct call to base method shared between client and server. |
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41 print(it.hello()) |
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42 |
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43 # Direct calls to proxied methods. They cause individual roundtrips. |
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44 print(it.foo("Un", two="Deux")) |
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45 print(it.bar("Eins", "Zwei")) |
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46 |
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47 # Batched call to a couple of proxied methods. |
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48 batch = it.batchiter() |
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49 # The calls return futures to eventually hold results. |
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50 foo = batch.foo(one="One", two="Two") |
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51 bar = batch.bar("Eins", "Zwei") |
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52 bar2 = batch.bar(b="Uno", a="Due") |
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53 |
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54 # Future shouldn't be set until we submit(). |
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55 assert isinstance(foo, wireprotov1peer.future) |
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56 assert not util.safehasattr(foo, 'value') |
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57 assert not util.safehasattr(bar, 'value') |
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58 batch.submit() |
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59 # Call results() to obtain results as a generator. |
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60 results = batch.results() |
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61 |
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62 # Future results shouldn't be set until we consume a value. |
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63 assert not util.safehasattr(foo, 'value') |
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64 foovalue = next(results) |
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65 assert util.safehasattr(foo, 'value') |
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66 assert foovalue == foo.value |
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67 print(foo.value) |
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68 next(results) |
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69 print(bar.value) |
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70 next(results) |
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71 print(bar2.value) |
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72 |
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73 # We should be at the end of the results generator. |
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74 try: |
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75 next(results) |
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76 except StopIteration: |
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77 print('proper end of results generator') |
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78 else: |
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79 print('extra emitted element!') |
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80 |
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81 # Attempting to call a non-batchable method inside a batch fails. |
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82 batch = it.batchiter() |
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83 try: |
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84 batch.greet(name='John Smith') |
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85 except error.ProgrammingError as e: |
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86 print(e) |
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87 |
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88 # Attempting to call a local method inside a batch fails. |
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89 batch = it.batchiter() |
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90 try: |
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91 batch.hello() |
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92 except error.ProgrammingError as e: |
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93 print(e) |
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94 |
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95 # local usage |
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96 mylocal = localthing() |
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97 print() |
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98 print("== Local") |
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99 use(mylocal) |
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100 |
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101 # demo remoting; mimicks what wireproto and HTTP/SSH do |
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102 |
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103 # shared |
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104 |
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105 def escapearg(plain): |
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106 return (plain |
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107 .replace(':', '::') |
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108 .replace(',', ':,') |
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109 .replace(';', ':;') |
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110 .replace('=', ':=')) |
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111 def unescapearg(escaped): |
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112 return (escaped |
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113 .replace(':=', '=') |
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114 .replace(':;', ';') |
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115 .replace(':,', ',') |
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116 .replace('::', ':')) |
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117 |
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118 # server side |
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119 |
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120 # equivalent of wireproto's global functions |
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121 class server(object): |
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122 def __init__(self, local): |
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123 self.local = local |
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124 def _call(self, name, args): |
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125 args = dict(arg.split('=', 1) for arg in args) |
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126 return getattr(self, name)(**args) |
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127 def perform(self, req): |
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128 print("REQ:", req) |
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129 name, args = req.split('?', 1) |
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130 args = args.split('&') |
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131 vals = dict(arg.split('=', 1) for arg in args) |
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132 res = getattr(self, name)(**vals) |
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133 print(" ->", res) |
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134 return res |
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135 def batch(self, cmds): |
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136 res = [] |
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137 for pair in cmds.split(';'): |
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138 name, args = pair.split(':', 1) |
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139 vals = {} |
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140 for a in args.split(','): |
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141 if a: |
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142 n, v = a.split('=') |
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143 vals[n] = unescapearg(v) |
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144 res.append(escapearg(getattr(self, name)(**vals))) |
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145 return ';'.join(res) |
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146 def foo(self, one, two): |
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147 return mangle(self.local.foo(unmangle(one), unmangle(two))) |
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148 def bar(self, b, a): |
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149 return mangle(self.local.bar(unmangle(b), unmangle(a))) |
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150 def greet(self, name): |
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151 return mangle(self.local.greet(unmangle(name))) |
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152 myserver = server(mylocal) |
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153 |
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154 # local side |
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155 |
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156 # equivalent of wireproto.encode/decodelist, that is, type-specific marshalling |
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157 # here we just transform the strings a bit to check we're properly en-/decoding |
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158 def mangle(s): |
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159 return ''.join(chr(ord(c) + 1) for c in s) |
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160 def unmangle(s): |
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161 return ''.join(chr(ord(c) - 1) for c in s) |
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162 |
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163 # equivalent of wireproto.wirerepository and something like http's wire format |
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164 class remotething(thing): |
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165 def __init__(self, server): |
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166 self.server = server |
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167 def _submitone(self, name, args): |
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168 req = name + '?' + '&'.join(['%s=%s' % (n, v) for n, v in args]) |
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169 return self.server.perform(req) |
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170 def _submitbatch(self, cmds): |
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171 req = [] |
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172 for name, args in cmds: |
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173 args = ','.join(n + '=' + escapearg(v) for n, v in args) |
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174 req.append(name + ':' + args) |
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175 req = ';'.join(req) |
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176 res = self._submitone('batch', [('cmds', req,)]) |
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177 for r in res.split(';'): |
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178 yield r |
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179 |
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180 def batchiter(self): |
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181 return wireprotov1peer.remoteiterbatcher(self) |
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182 |
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183 @wireprotov1peer.batchable |
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184 def foo(self, one, two=None): |
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185 encargs = [('one', mangle(one),), ('two', mangle(two),)] |
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186 encresref = wireprotov1peer.future() |
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187 yield encargs, encresref |
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188 yield unmangle(encresref.value) |
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189 |
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190 @wireprotov1peer.batchable |
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191 def bar(self, b, a): |
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192 encresref = wireprotov1peer.future() |
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193 yield [('b', mangle(b),), ('a', mangle(a),)], encresref |
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194 yield unmangle(encresref.value) |
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195 |
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196 # greet is coded directly. It therefore does not support batching. If it |
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197 # does appear in a batch, the batch is split around greet, and the call to |
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198 # greet is done in its own roundtrip. |
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199 def greet(self, name=None): |
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200 return unmangle(self._submitone('greet', [('name', mangle(name),)])) |
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201 |
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202 # demo remote usage |
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203 |
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204 myproxy = remotething(myserver) |
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205 print() |
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206 print("== Remote") |
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207 use(myproxy) |