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@@ -1,396 +1,396 b'' | |||
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1 | 1 | """AsyncResult objects for the client |
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2 | 2 | |
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3 | 3 | Authors: |
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4 | 4 | |
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5 | 5 | * MinRK |
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6 | 6 | """ |
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7 | 7 | #----------------------------------------------------------------------------- |
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8 | 8 | # Copyright (C) 2010-2011 The IPython Development Team |
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9 | 9 | # |
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10 | 10 | # Distributed under the terms of the BSD License. The full license is in |
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11 | 11 | # the file COPYING, distributed as part of this software. |
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12 | 12 | #----------------------------------------------------------------------------- |
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13 | 13 | |
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14 | 14 | #----------------------------------------------------------------------------- |
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15 | 15 | # Imports |
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16 | 16 | #----------------------------------------------------------------------------- |
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17 | 17 | |
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18 | 18 | import time |
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19 | 19 | |
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20 | 20 | from zmq import MessageTracker |
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21 | 21 | |
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22 | 22 | from IPython.external.decorator import decorator |
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23 | 23 | from IPython.parallel import error |
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24 | 24 | |
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25 | 25 | #----------------------------------------------------------------------------- |
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26 | 26 | # Classes |
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27 | 27 | #----------------------------------------------------------------------------- |
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28 | 28 | |
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29 | 29 | # global empty tracker that's always done: |
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30 | 30 | finished_tracker = MessageTracker() |
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31 | 31 | |
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32 | 32 | @decorator |
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33 | 33 | def check_ready(f, self, *args, **kwargs): |
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34 | 34 | """Call spin() to sync state prior to calling the method.""" |
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35 | 35 | self.wait(0) |
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36 | 36 | if not self._ready: |
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37 | 37 | raise error.TimeoutError("result not ready") |
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38 | 38 | return f(self, *args, **kwargs) |
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39 | 39 | |
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40 | 40 | class AsyncResult(object): |
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41 | 41 | """Class for representing results of non-blocking calls. |
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42 | 42 | |
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43 | 43 | Provides the same interface as :py:class:`multiprocessing.pool.AsyncResult`. |
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44 | 44 | """ |
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45 | 45 | |
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46 | 46 | msg_ids = None |
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47 | 47 | _targets = None |
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48 | 48 | _tracker = None |
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49 | 49 | _single_result = False |
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50 | 50 | |
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51 | 51 | def __init__(self, client, msg_ids, fname='unknown', targets=None, tracker=None): |
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52 | 52 | if isinstance(msg_ids, basestring): |
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53 | 53 | # always a list |
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54 | 54 | msg_ids = [msg_ids] |
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55 | 55 | if tracker is None: |
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56 | 56 | # default to always done |
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57 | 57 | tracker = finished_tracker |
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58 | 58 | self._client = client |
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59 | 59 | self.msg_ids = msg_ids |
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60 | 60 | self._fname=fname |
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61 | 61 | self._targets = targets |
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62 | 62 | self._tracker = tracker |
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63 | 63 | self._ready = False |
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64 | 64 | self._success = None |
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65 | 65 | self._metadata = None |
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66 | 66 | if len(msg_ids) == 1: |
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67 | 67 | self._single_result = not isinstance(targets, (list, tuple)) |
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68 | 68 | else: |
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69 | 69 | self._single_result = False |
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70 | 70 | |
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71 | 71 | def __repr__(self): |
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72 | 72 | if self._ready: |
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73 | 73 | return "<%s: finished>"%(self.__class__.__name__) |
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74 | 74 | else: |
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75 | 75 | return "<%s: %s>"%(self.__class__.__name__,self._fname) |
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76 | 76 | |
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77 | 77 | |
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78 | 78 | def _reconstruct_result(self, res): |
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79 | 79 | """Reconstruct our result from actual result list (always a list) |
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80 | 80 | |
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81 | 81 | Override me in subclasses for turning a list of results |
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82 | 82 | into the expected form. |
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83 | 83 | """ |
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84 | 84 | if self._single_result: |
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85 | 85 | return res[0] |
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86 | 86 | else: |
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87 | 87 | return res |
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88 | 88 | |
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89 | 89 | def get(self, timeout=-1): |
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90 | 90 | """Return the result when it arrives. |
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91 | 91 | |
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92 | 92 | If `timeout` is not ``None`` and the result does not arrive within |
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93 | 93 | `timeout` seconds then ``TimeoutError`` is raised. If the |
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94 | 94 | remote call raised an exception then that exception will be reraised |
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95 | 95 | by get() inside a `RemoteError`. |
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96 | 96 | """ |
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97 | 97 | if not self.ready(): |
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98 | 98 | self.wait(timeout) |
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99 | 99 | |
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100 | 100 | if self._ready: |
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101 | 101 | if self._success: |
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102 | 102 | return self._result |
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103 | 103 | else: |
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104 | 104 | raise self._exception |
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105 | 105 | else: |
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106 | 106 | raise error.TimeoutError("Result not ready.") |
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107 | 107 | |
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108 | 108 | def ready(self): |
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109 | 109 | """Return whether the call has completed.""" |
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110 | 110 | if not self._ready: |
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111 | 111 | self.wait(0) |
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112 | 112 | return self._ready |
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113 | 113 | |
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114 | 114 | def wait(self, timeout=-1): |
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115 | 115 | """Wait until the result is available or until `timeout` seconds pass. |
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116 | 116 | |
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117 | 117 | This method always returns None. |
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118 | 118 | """ |
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119 | 119 | if self._ready: |
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120 | 120 | return |
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121 | 121 | self._ready = self._client.wait(self.msg_ids, timeout) |
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122 | 122 | if self._ready: |
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123 | 123 | try: |
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124 | 124 | results = map(self._client.results.get, self.msg_ids) |
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125 | 125 | self._result = results |
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126 | 126 | if self._single_result: |
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127 | 127 | r = results[0] |
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128 | 128 | if isinstance(r, Exception): |
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129 | 129 | raise r |
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130 | 130 | else: |
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131 | 131 | results = error.collect_exceptions(results, self._fname) |
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132 | 132 | self._result = self._reconstruct_result(results) |
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133 | 133 | except Exception, e: |
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134 | 134 | self._exception = e |
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135 | 135 | self._success = False |
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136 | 136 | else: |
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137 | 137 | self._success = True |
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138 | 138 | finally: |
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139 | 139 | self._metadata = map(self._client.metadata.get, self.msg_ids) |
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140 | 140 | |
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141 | 141 | |
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142 | 142 | def successful(self): |
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143 | 143 | """Return whether the call completed without raising an exception. |
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144 | 144 | |
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145 | 145 | Will raise ``AssertionError`` if the result is not ready. |
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146 | 146 | """ |
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147 | 147 | assert self.ready() |
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148 | 148 | return self._success |
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149 | 149 | |
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150 | 150 | #---------------------------------------------------------------- |
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151 | 151 | # Extra methods not in mp.pool.AsyncResult |
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152 | 152 | #---------------------------------------------------------------- |
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153 | 153 | |
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154 | 154 | def get_dict(self, timeout=-1): |
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155 | 155 | """Get the results as a dict, keyed by engine_id. |
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156 | 156 | |
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157 | 157 | timeout behavior is described in `get()`. |
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158 | 158 | """ |
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159 | 159 | |
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160 | 160 | results = self.get(timeout) |
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161 | 161 | engine_ids = [ md['engine_id'] for md in self._metadata ] |
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162 | 162 | bycount = sorted(engine_ids, key=lambda k: engine_ids.count(k)) |
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163 | 163 | maxcount = bycount.count(bycount[-1]) |
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164 | 164 | if maxcount > 1: |
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165 | 165 | raise ValueError("Cannot build dict, %i jobs ran on engine #%i"%( |
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166 | 166 | maxcount, bycount[-1])) |
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167 | 167 | |
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168 | 168 | return dict(zip(engine_ids,results)) |
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169 | 169 | |
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170 | 170 | @property |
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171 | 171 | def result(self): |
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172 | 172 | """result property wrapper for `get(timeout=0)`.""" |
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173 | 173 | return self.get() |
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174 | 174 | |
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175 | 175 | # abbreviated alias: |
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176 | 176 | r = result |
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177 | 177 | |
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178 | 178 | @property |
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179 | 179 | @check_ready |
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180 | 180 | def metadata(self): |
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181 | 181 | """property for accessing execution metadata.""" |
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182 | 182 | if self._single_result: |
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183 | 183 | return self._metadata[0] |
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184 | 184 | else: |
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185 | 185 | return self._metadata |
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186 | 186 | |
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187 | 187 | @property |
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188 | 188 | def result_dict(self): |
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189 | 189 | """result property as a dict.""" |
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190 | 190 | return self.get_dict() |
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191 | 191 | |
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192 | 192 | def __dict__(self): |
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193 | 193 | return self.get_dict(0) |
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194 | 194 | |
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195 | 195 | def abort(self): |
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196 | 196 | """abort my tasks.""" |
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197 | 197 | assert not self.ready(), "Can't abort, I am already done!" |
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198 | return self.client.abort(self.msg_ids, targets=self._targets, block=True) | |
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198 | return self._client.abort(self.msg_ids, targets=self._targets, block=True) | |
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199 | 199 | |
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200 | 200 | @property |
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201 | 201 | def sent(self): |
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202 | 202 | """check whether my messages have been sent.""" |
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203 | 203 | return self._tracker.done |
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204 | 204 | |
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205 | 205 | def wait_for_send(self, timeout=-1): |
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206 | 206 | """wait for pyzmq send to complete. |
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207 | 207 | |
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208 | 208 | This is necessary when sending arrays that you intend to edit in-place. |
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209 | 209 | `timeout` is in seconds, and will raise TimeoutError if it is reached |
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210 | 210 | before the send completes. |
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211 | 211 | """ |
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212 | 212 | return self._tracker.wait(timeout) |
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213 | 213 | |
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214 | 214 | #------------------------------------- |
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215 | 215 | # dict-access |
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216 | 216 | #------------------------------------- |
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217 | 217 | |
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218 | 218 | @check_ready |
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219 | 219 | def __getitem__(self, key): |
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220 | 220 | """getitem returns result value(s) if keyed by int/slice, or metadata if key is str. |
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221 | 221 | """ |
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222 | 222 | if isinstance(key, int): |
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223 | 223 | return error.collect_exceptions([self._result[key]], self._fname)[0] |
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224 | 224 | elif isinstance(key, slice): |
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225 | 225 | return error.collect_exceptions(self._result[key], self._fname) |
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226 | 226 | elif isinstance(key, basestring): |
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227 | 227 | values = [ md[key] for md in self._metadata ] |
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228 | 228 | if self._single_result: |
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229 | 229 | return values[0] |
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230 | 230 | else: |
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231 | 231 | return values |
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232 | 232 | else: |
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233 | 233 | raise TypeError("Invalid key type %r, must be 'int','slice', or 'str'"%type(key)) |
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234 | 234 | |
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235 | 235 | def __getattr__(self, key): |
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236 | 236 | """getattr maps to getitem for convenient attr access to metadata.""" |
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237 | 237 | try: |
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238 | 238 | return self.__getitem__(key) |
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239 | 239 | except (error.TimeoutError, KeyError): |
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240 | 240 | raise AttributeError("%r object has no attribute %r"%( |
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241 | 241 | self.__class__.__name__, key)) |
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242 | 242 | |
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243 | 243 | # asynchronous iterator: |
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244 | 244 | def __iter__(self): |
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245 | 245 | if self._single_result: |
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246 | 246 | raise TypeError("AsyncResults with a single result are not iterable.") |
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247 | 247 | try: |
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248 | 248 | rlist = self.get(0) |
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249 | 249 | except error.TimeoutError: |
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250 | 250 | # wait for each result individually |
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251 | 251 | for msg_id in self.msg_ids: |
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252 | 252 | ar = AsyncResult(self._client, msg_id, self._fname) |
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253 | 253 | yield ar.get() |
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254 | 254 | else: |
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255 | 255 | # already done |
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256 | 256 | for r in rlist: |
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257 | 257 | yield r |
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258 | 258 | |
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259 | 259 | |
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260 | 260 | |
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261 | 261 | class AsyncMapResult(AsyncResult): |
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262 | 262 | """Class for representing results of non-blocking gathers. |
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263 | 263 | |
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264 | 264 | This will properly reconstruct the gather. |
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265 | 265 | |
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266 | 266 | This class is iterable at any time, and will wait on results as they come. |
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267 | 267 | |
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268 | 268 | If ordered=False, then the first results to arrive will come first, otherwise |
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269 | 269 | results will be yielded in the order they were submitted. |
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270 | 270 | |
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271 | 271 | """ |
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272 | 272 | |
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273 | 273 | def __init__(self, client, msg_ids, mapObject, fname='', ordered=True): |
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274 | 274 | AsyncResult.__init__(self, client, msg_ids, fname=fname) |
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275 | 275 | self._mapObject = mapObject |
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276 | 276 | self._single_result = False |
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277 | 277 | self.ordered = ordered |
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278 | 278 | |
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279 | 279 | def _reconstruct_result(self, res): |
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280 | 280 | """Perform the gather on the actual results.""" |
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281 | 281 | return self._mapObject.joinPartitions(res) |
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282 | 282 | |
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283 | 283 | # asynchronous iterator: |
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284 | 284 | def __iter__(self): |
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285 | 285 | it = self._ordered_iter if self.ordered else self._unordered_iter |
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286 | 286 | for r in it(): |
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287 | 287 | yield r |
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288 | 288 | |
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289 | 289 | # asynchronous ordered iterator: |
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290 | 290 | def _ordered_iter(self): |
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291 | 291 | """iterator for results *as they arrive*, preserving submission order.""" |
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292 | 292 | try: |
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293 | 293 | rlist = self.get(0) |
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294 | 294 | except error.TimeoutError: |
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295 | 295 | # wait for each result individually |
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296 | 296 | for msg_id in self.msg_ids: |
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297 | 297 | ar = AsyncResult(self._client, msg_id, self._fname) |
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298 | 298 | rlist = ar.get() |
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299 | 299 | try: |
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300 | 300 | for r in rlist: |
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301 | 301 | yield r |
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302 | 302 | except TypeError: |
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303 | 303 | # flattened, not a list |
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304 | 304 | # this could get broken by flattened data that returns iterables |
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305 | 305 | # but most calls to map do not expose the `flatten` argument |
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306 | 306 | yield rlist |
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307 | 307 | else: |
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308 | 308 | # already done |
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309 | 309 | for r in rlist: |
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310 | 310 | yield r |
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311 | 311 | |
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312 | 312 | # asynchronous unordered iterator: |
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313 | 313 | def _unordered_iter(self): |
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314 | 314 | """iterator for results *as they arrive*, on FCFS basis, ignoring submission order.""" |
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315 | 315 | try: |
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316 | 316 | rlist = self.get(0) |
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317 | 317 | except error.TimeoutError: |
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318 | 318 | pending = set(self.msg_ids) |
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319 | 319 | while pending: |
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320 | 320 | try: |
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321 | 321 | self._client.wait(pending, 1e-3) |
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322 | 322 | except error.TimeoutError: |
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323 | 323 | # ignore timeout error, because that only means |
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324 | 324 | # *some* jobs are outstanding |
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325 | 325 | pass |
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326 | 326 | # update ready set with those no longer outstanding: |
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327 | 327 | ready = pending.difference(self._client.outstanding) |
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328 | 328 | # update pending to exclude those that are finished |
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329 | 329 | pending = pending.difference(ready) |
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330 | 330 | while ready: |
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331 | 331 | msg_id = ready.pop() |
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332 | 332 | ar = AsyncResult(self._client, msg_id, self._fname) |
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333 | 333 | rlist = ar.get() |
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334 | 334 | try: |
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335 | 335 | for r in rlist: |
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336 | 336 | yield r |
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337 | 337 | except TypeError: |
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338 | 338 | # flattened, not a list |
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339 | 339 | # this could get broken by flattened data that returns iterables |
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340 | 340 | # but most calls to map do not expose the `flatten` argument |
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341 | 341 | yield rlist |
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342 | 342 | else: |
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343 | 343 | # already done |
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344 | 344 | for r in rlist: |
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345 | 345 | yield r |
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346 | 346 | |
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347 | 347 | |
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348 | 348 | |
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349 | 349 | class AsyncHubResult(AsyncResult): |
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350 | 350 | """Class to wrap pending results that must be requested from the Hub. |
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351 | 351 | |
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352 | 352 | Note that waiting/polling on these objects requires polling the Hubover the network, |
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353 | 353 | so use `AsyncHubResult.wait()` sparingly. |
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354 | 354 | """ |
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355 | 355 | |
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356 | 356 | def wait(self, timeout=-1): |
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357 | 357 | """wait for result to complete.""" |
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358 | 358 | start = time.time() |
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359 | 359 | if self._ready: |
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360 | 360 | return |
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361 | 361 | local_ids = filter(lambda msg_id: msg_id in self._client.outstanding, self.msg_ids) |
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362 | 362 | local_ready = self._client.wait(local_ids, timeout) |
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363 | 363 | if local_ready: |
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364 | 364 | remote_ids = filter(lambda msg_id: msg_id not in self._client.results, self.msg_ids) |
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365 | 365 | if not remote_ids: |
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366 | 366 | self._ready = True |
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367 | 367 | else: |
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368 | 368 | rdict = self._client.result_status(remote_ids, status_only=False) |
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369 | 369 | pending = rdict['pending'] |
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370 | 370 | while pending and (timeout < 0 or time.time() < start+timeout): |
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371 | 371 | rdict = self._client.result_status(remote_ids, status_only=False) |
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372 | 372 | pending = rdict['pending'] |
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373 | 373 | if pending: |
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374 | 374 | time.sleep(0.1) |
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375 | 375 | if not pending: |
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376 | 376 | self._ready = True |
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377 | 377 | if self._ready: |
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378 | 378 | try: |
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379 | 379 | results = map(self._client.results.get, self.msg_ids) |
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380 | 380 | self._result = results |
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381 | 381 | if self._single_result: |
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382 | 382 | r = results[0] |
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383 | 383 | if isinstance(r, Exception): |
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384 | 384 | raise r |
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385 | 385 | else: |
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386 | 386 | results = error.collect_exceptions(results, self._fname) |
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387 | 387 | self._result = self._reconstruct_result(results) |
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388 | 388 | except Exception, e: |
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389 | 389 | self._exception = e |
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390 | 390 | self._success = False |
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391 | 391 | else: |
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392 | 392 | self._success = True |
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393 | 393 | finally: |
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394 | 394 | self._metadata = map(self._client.metadata.get, self.msg_ids) |
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395 | 395 | |
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396 | 396 | __all__ = ['AsyncResult', 'AsyncMapResult', 'AsyncHubResult'] No newline at end of file |
@@ -1,115 +1,125 b'' | |||
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1 | 1 | """Tests for asyncresult.py |
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2 | 2 | |
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3 | 3 | Authors: |
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4 | 4 | |
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5 | 5 | * Min RK |
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6 | 6 | """ |
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7 | 7 | |
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8 | 8 | #------------------------------------------------------------------------------- |
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9 | 9 | # Copyright (C) 2011 The IPython Development Team |
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10 | 10 | # |
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11 | 11 | # Distributed under the terms of the BSD License. The full license is in |
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12 | 12 | # the file COPYING, distributed as part of this software. |
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13 | 13 | #------------------------------------------------------------------------------- |
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14 | 14 | |
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15 | 15 | #------------------------------------------------------------------------------- |
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16 | 16 | # Imports |
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17 | 17 | #------------------------------------------------------------------------------- |
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18 | 18 | |
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19 | 19 | |
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20 | 20 | from IPython.parallel.error import TimeoutError |
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21 | 21 | |
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22 | from IPython.parallel import error | |
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22 | 23 | from IPython.parallel.tests import add_engines |
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23 | 24 | from .clienttest import ClusterTestCase |
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24 | 25 | |
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25 | 26 | def setup(): |
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26 | 27 | add_engines(2, total=True) |
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27 | 28 | |
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28 | 29 | def wait(n): |
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29 | 30 | import time |
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30 | 31 | time.sleep(n) |
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31 | 32 | return n |
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32 | 33 | |
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33 | 34 | class AsyncResultTest(ClusterTestCase): |
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34 | 35 | |
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35 | def test_single_result(self): | |
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36 | def test_single_result_view(self): | |
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37 | """various one-target views get the right value for single_result""" | |
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36 | 38 | eid = self.client.ids[-1] |
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37 | 39 | ar = self.client[eid].apply_async(lambda : 42) |
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38 | 40 | self.assertEquals(ar.get(), 42) |
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39 | 41 | ar = self.client[[eid]].apply_async(lambda : 42) |
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40 | 42 | self.assertEquals(ar.get(), [42]) |
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41 | 43 | ar = self.client[-1:].apply_async(lambda : 42) |
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42 | 44 | self.assertEquals(ar.get(), [42]) |
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43 | 45 | |
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44 | 46 | def test_get_after_done(self): |
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45 | 47 | ar = self.client[-1].apply_async(lambda : 42) |
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46 | 48 | ar.wait() |
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47 | 49 | self.assertTrue(ar.ready()) |
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48 | 50 | self.assertEquals(ar.get(), 42) |
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49 | 51 | self.assertEquals(ar.get(), 42) |
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50 | 52 | |
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51 | 53 | def test_get_before_done(self): |
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52 | 54 | ar = self.client[-1].apply_async(wait, 0.1) |
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53 | 55 | self.assertRaises(TimeoutError, ar.get, 0) |
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54 | 56 | ar.wait(0) |
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55 | 57 | self.assertFalse(ar.ready()) |
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56 | 58 | self.assertEquals(ar.get(), 0.1) |
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57 | 59 | |
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58 | 60 | def test_get_after_error(self): |
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59 | 61 | ar = self.client[-1].apply_async(lambda : 1/0) |
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60 | 62 | ar.wait(10) |
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61 | 63 | self.assertRaisesRemote(ZeroDivisionError, ar.get) |
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62 | 64 | self.assertRaisesRemote(ZeroDivisionError, ar.get) |
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63 | 65 | self.assertRaisesRemote(ZeroDivisionError, ar.get_dict) |
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64 | 66 | |
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65 | 67 | def test_get_dict(self): |
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66 | 68 | n = len(self.client) |
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67 | 69 | ar = self.client[:].apply_async(lambda : 5) |
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68 | 70 | self.assertEquals(ar.get(), [5]*n) |
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69 | 71 | d = ar.get_dict() |
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70 | 72 | self.assertEquals(sorted(d.keys()), sorted(self.client.ids)) |
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71 | 73 | for eid,r in d.iteritems(): |
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72 | 74 | self.assertEquals(r, 5) |
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73 | 75 | |
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74 | 76 | def test_list_amr(self): |
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75 | 77 | ar = self.client.load_balanced_view().map_async(wait, [0.1]*5) |
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76 | 78 | rlist = list(ar) |
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77 | 79 | |
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78 | 80 | def test_getattr(self): |
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79 | 81 | ar = self.client[:].apply_async(wait, 0.5) |
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80 | 82 | self.assertRaises(AttributeError, lambda : ar._foo) |
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81 | 83 | self.assertRaises(AttributeError, lambda : ar.__length_hint__()) |
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82 | 84 | self.assertRaises(AttributeError, lambda : ar.foo) |
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83 | 85 | self.assertRaises(AttributeError, lambda : ar.engine_id) |
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84 | 86 | self.assertFalse(hasattr(ar, '__length_hint__')) |
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85 | 87 | self.assertFalse(hasattr(ar, 'foo')) |
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86 | 88 | self.assertFalse(hasattr(ar, 'engine_id')) |
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87 | 89 | ar.get(5) |
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88 | 90 | self.assertRaises(AttributeError, lambda : ar._foo) |
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89 | 91 | self.assertRaises(AttributeError, lambda : ar.__length_hint__()) |
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90 | 92 | self.assertRaises(AttributeError, lambda : ar.foo) |
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91 | 93 | self.assertTrue(isinstance(ar.engine_id, list)) |
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92 | 94 | self.assertEquals(ar.engine_id, ar['engine_id']) |
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93 | 95 | self.assertFalse(hasattr(ar, '__length_hint__')) |
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94 | 96 | self.assertFalse(hasattr(ar, 'foo')) |
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95 | 97 | self.assertTrue(hasattr(ar, 'engine_id')) |
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96 | 98 | |
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97 | 99 | def test_getitem(self): |
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98 | 100 | ar = self.client[:].apply_async(wait, 0.5) |
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99 | 101 | self.assertRaises(TimeoutError, lambda : ar['foo']) |
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100 | 102 | self.assertRaises(TimeoutError, lambda : ar['engine_id']) |
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101 | 103 | ar.get(5) |
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102 | 104 | self.assertRaises(KeyError, lambda : ar['foo']) |
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103 | 105 | self.assertTrue(isinstance(ar['engine_id'], list)) |
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104 | 106 | self.assertEquals(ar.engine_id, ar['engine_id']) |
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105 | 107 | |
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106 | 108 | def test_single_result(self): |
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107 | 109 | ar = self.client[-1].apply_async(wait, 0.5) |
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108 | 110 | self.assertRaises(TimeoutError, lambda : ar['foo']) |
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109 | 111 | self.assertRaises(TimeoutError, lambda : ar['engine_id']) |
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110 | 112 | self.assertTrue(ar.get(5) == 0.5) |
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111 | 113 | self.assertTrue(isinstance(ar['engine_id'], int)) |
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112 | 114 | self.assertTrue(isinstance(ar.engine_id, int)) |
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113 | 115 | self.assertEquals(ar.engine_id, ar['engine_id']) |
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116 | ||
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117 | def test_abort(self): | |
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118 | e = self.client[-1] | |
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119 | ar = e.execute('import time; time.sleep(1)', block=False) | |
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120 | ar2 = e.apply_async(lambda : 2) | |
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121 | ar2.abort() | |
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122 | self.assertRaises(error.TaskAborted, ar2.get) | |
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123 | ar.get() | |
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114 | 124 | |
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115 | 125 |
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