annotate Todo @ 442:3819dec4641e

command waiting during merge
author one
date Sun, 12 Sep 2010 22:23:53 +0900
parents 15888d516f10
children 22a741c1fa2d
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1 Sat Sep 11 16:45:40 JST 2010
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2
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3 これ、やっぱり難しすぎ。getMergeAgain で、sentMergedList が空でない場合がある。
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4
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5 Termination するようにはなった。しかし、Merge はダメなようだ。
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6
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7 mergeAgain した時に、前のmerge command がeditorから返されることがあって、
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8 それは、全部、読む必要がある。
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9
442
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10 Merge 中のcommandがblockされてない。
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11
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12 next.send(command) すると、直接、次のeditorに送られてしまうので、
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13 merge 中に止められない。
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14
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15 Sat Jan 16 18:06:37 JST 2010
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16
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17 sentList 全部削除だと quit2 が早めに出されてしまうので、
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18 ちゃんと終了しない。
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19
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20 Tue Jan 12 01:20:12 JST 2010
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21
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22 sentList の先頭を削除するのは、Merge が終った後。一周した部分は、
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23 確定するはずなので全部削除で良い。その後、来た、Ack などは無視して良い。
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24
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25 quit を早く処理してしまう場合があるらしい。
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26
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27 だいぶ近くなって来た気がする。
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28
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29 Sat Jan 9 15:36:35 JST 2010
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30
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31 やっぱり全部ソートしちゃいけないのかな...
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32
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33 Merge のtriggerになるコマンドは、sentList の先頭
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34 sort してはいけないものとは?
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35
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36 unMergedList は、Editor に送ったコマンド全部
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37 sentList は、外部のエディタに送り出したもの全部
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38
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39 そっか、やっぱり、current command が外されちゃっているのはまずいらしい。
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40 あと、sort の順序も良くない。
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41
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42 一回、sort したものは、外して良いっぽい。(ACKが来たものまでは確定)
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43
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44
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45 Sat Jan 2 20:52:17 JST 2010
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46
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47 uMergeList のDELETE command のdeleted text が正しくない...
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48 なので、最初の一回は良いのだが二回目ででたらめになってしまう。
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49 これは、考えてなかった。
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50 Translator.checkMergeConflict
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51 が受け取っているので、それを uMergeList にすれば良いのだが...
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52
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53 ちょっと、やっかいなプログラムになるかも。
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54
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55 unMergeList はMerge 後、削除 ( まだ merge してない list )
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56 sentList はいじれない ( 自分が他のエディタに送信した list)
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57
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58 sentMergedList ( 送信した merge command )
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59 mergeAgainList ( merge 中に自分のeditorに割り込まれた分 )
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60
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61 確かに、mergeAgainList とかなんか、quueue が多すぎ。
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62
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63
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64 sort なんだけど...
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65
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66 e0 e1 e2 e0 e1 e2 e0 e1 e2 e0 e1 e2 e0
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67 |-------|--------|--------|
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68 |--------|--------|--------|
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69 |--------|--------|--------|
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70
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71 となる。なので、単純な editor id の順序では、まずいのでは?
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72 (自分の以外はack) ack の eid からの剰余で廻せば良いはず。
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73
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74 mergeでeditorから返ってきたのを unMerge に入れるべき。でな
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75 いと undo が狂う。Merge は unMergeをundoし sentList から構
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76 成する。
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79 Sat Jan 2 03:27:47 JST 2010
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80
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81 うーん、まだ、だめですね。
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82
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83 Session Manager の quit protocol って入れてない気がする...
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84 切れた場合の対処も入れないといけないんだよな。
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85
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86 Sat Jan 2 00:02:41 JST 2010
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87
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88 Todo:
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89 writeLog に level/flag を付けるか?
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90 Done:
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91 既に付いてました。
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92
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93 Selector.select() のフラグは意味がない。その後、必ず、
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94 selectedKeys() を調べる必要がある。これは、Simulator
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95 と実ソケットの動作が異なる部分。Warning とか出せないものか?
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96
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97 確かに、Merge 変かも。unMerged を undo するのは良いが、
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98 sort するのは、unMerged であって、undo を付加したものではないはず。
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99
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100 いや、それは正しく出来ている。output に先にundoを入れて、
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101 cmd には、そのまま残している。(順序は sort されるので関係ない)
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102
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103 でも、sortedCmds1 に add する時に、Comparator で順序付けされて
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104 しまう。getPrecedence() は必要な列の切出しに使う。
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105
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106 Self Merge case
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107 E_{00} E_{12} E_{01} E_{23} E_{02} (E_{00})
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108 Other Merge case
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109 E_{10} E_{11} E_{23} E_{01} E_{02} (Eack_{10})
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110
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111 ack が間に入ることはない(merge で消されるから)
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112 original command の存在しない ack もない。
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113 (あったら、エラー。無視して良い)
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114 ack の来ない original command は sequence エラーとなるなず。
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115 (あるいは time out)
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116
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117 ということは、getPrecedence せずに、うむを言わせず
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118 全部 sort すれば良いってこと? ってことは実は、E_{12}
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119 が来た段階で追い越せるかどうかはわかる?
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120
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121 Ack を受け取ったら、それは、必ず先頭にあるはず。
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122
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123 E_{00} E_{10} E_{11} E_{23} E_{01} E_{02} (Eack_{10})
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124
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125 とかはない。ack は追い越せないから。この間の入力は確定で、
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126 優先順位にしたがって順序付しsortする。次は、
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127
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128 E_{10} E_{11} E_{23} E_{01} E_{02} (Eack_{10})
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129 E_{11} E_{23} E_{01} E_{02} E_{12} (Eack_{11})
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130
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131 で、これは、E_{12} までをsort すれば良い。ということは、
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132 取れるのは最初の一個だけってこと。
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133
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134 nop の場合は、command が着いた直後に出力されるけど、
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135 ack の場合は、それは出力されないで、もう一周する
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136 ack が流される。ack は、一つ前のエディタが出力した
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137 nop に相当する。
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138
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139 この方法だと、編集コマンドの干渉を気にする必要はない。それは、
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140 最適化フェーズで自動的に排除される。(はず) ということは、
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141 getPrecedece の方で sort してやって、今の lineno の比較は
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142 無意味なので排除ということですね。
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143
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144 2方向をスター型/木型に順々に処理する方法でも良いのか。
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145
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146 ということは、unMergedCmds と sendList って、おなじものってこと?
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147
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148 Wed Nov 26 15:15:16 JST 2008
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149
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150 Ring 構造なので、一部のeidtorで止まると全体が止まってしまう。
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151 (非同期なのでeditorが止まることはない) これは、そういう設計
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152 なので仕方がないんだが応答しないEditor/SesisionManagerを
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153 切り離す機構は必要だろう。
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154
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155 このTodo list のmaintenanceをEclipse側で出来ないの? Perl Script でも
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156 でも良いけど。
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157
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158 Wed Nov 26 08:44:29 JST 2008
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159
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160 Todo:
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161 QUITで、まだ、処理があるのにEditorが止まってしまう状況が
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162 あるらしい。
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163
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164 Done:
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165 syncText 中にquitが来ていたかららしい。
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166
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167 Tue Nov 25 09:13:42 JST 2008
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168
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169 Todo:
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170 だいたい動いたが、たまに爆発するバグが残っているらしい。
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171 どうも、optimizerのbugっぽいな... いや、違いますね。
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172 getMergeAgainの問題らしいが、直接の原因は良くわからない。
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173
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174 Done:
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175 なんと、Text.javaのdeleteの条件判断が間違ってました。
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176
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177 Mon Nov 24 22:51:45 JST 2008
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178
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179 watingCommandInMerge のqueueを一旦0にしてから、manageを
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180 呼ぶと、queueが既にあるのに、lockが外れた状態になってしまう。
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181
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182 watingCommandInMerge にforwardedCommandManageから入れちゃうと、
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183 User Editor Command と 一周して来てからのCommandを区別できない...
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184
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185 INSERT_USER/DELETE_USERを入れて回避。Editor側の変更も必要になるが、
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186 まぁ、仕方がない。
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187
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188 Editor側で、自分が出したINSERT/DELETE commandは無視する必要がある。
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189 ついでに、Editor側でINSERT_ACK/DELETE_ACKに書き換える方が良いらしい。
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190
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191 Todo:
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8009dd7b2013 command execution when commandInMergeQueue>0
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192 INSERT_ACK/DELETE_ACKが出ない場合があるらしい。と言うか、最初の
8009dd7b2013 command execution when commandInMergeQueue>0
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193 一回しか出ていない。
8009dd7b2013 command execution when commandInMergeQueue>0
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194
407
de4ef4313adc looks like working...
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diff changeset
195 Done:
de4ef4313adc looks like working...
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diff changeset
196 commandInMerge の扱いが変だった。
de4ef4313adc looks like working...
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197
397
149c9a53fc37 half done ACK protocol
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diff changeset
198 Wed Nov 19 19:21:47 JST 2008
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199
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diff changeset
200 ACK base に書き換えるのは良いが、途中でjoinして
149c9a53fc37 half done ACK protocol
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diff changeset
201 きたeditorが、ACKだけを受け取った時には無視する必要が
149c9a53fc37 half done ACK protocol
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202 ある。
149c9a53fc37 half done ACK protocol
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203
393
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204 Fri Oct 31 20:34:35 JST 2008
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205
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diff changeset
206 Note:
18cacd0b3ccf update tags
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207
18cacd0b3ccf update tags
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208 そもそも、NOPを付け加えるのがtrafficを増やしている。一周で
18cacd0b3ccf update tags
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diff changeset
209 は、状態が確定しないので、INSERT/INSERT_ACKで、それぞれ一周、
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diff changeset
210 計二周廻してやればいい。
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211 一週目で、そのコマンドを merge waiting queue にいれる
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212 二週目のAckコマンドを merge waiting queue と照合して、MERGE_STARTする
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diff changeset
213 で、良いんじゃないか? もちろん、editorにfowardして、戻って来た
18cacd0b3ccf update tags
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diff changeset
214 時点で判定する。
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diff changeset
215 Ackが戻って来た時点で、MERGE_STARTとみなして良い。
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diff changeset
216 何もなければ、MERGE_ENDを送り、コマンドがあれば、id=-2を送り、
18cacd0b3ccf update tags
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diff changeset
217 最後にMERGE_ENDを送る
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diff changeset
218 なので、MERGE_STARTも必要ない。これで、NOPを付け加えるのと、動作は
18cacd0b3ccf update tags
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diff changeset
219 同等になる。
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220
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diff changeset
221 ACK command はeditorでは実行しない。
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222
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223 ついでに、packet に source editor ID も付けるんじゃないか?
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224
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225 Tue Oct 28 09:50:23 JST 2008
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226 Todo: (kono)
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227 取り敢えず、動いたみたい。テスト用に、JavaなEditor + 複数のSession Manager
18cacd0b3ccf update tags
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diff changeset
228 + Auto Selector があると良いらしい。
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229
387
6f356d160e58 IPv6 any address
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230 Sun Oct 26 17:36:40 JST 2008
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231 Todo: (kono)
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diff changeset
232 GUI のEditorの方が、どれがどれだか、さっぱりわからない。
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233 せめて、sessionを持っているかとか出ないとだめっぽい。
393
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diff changeset
234
18cacd0b3ccf update tags
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235 Todo: (kono)
387
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236 なんか、NO_NAMEってのが最初に出るらしい。なんだ?
393
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diff changeset
237 Done: vim のsession 管理バッファがまだ残っていたようです。
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diff changeset
238 復活させてもいいかな〜
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diff changeset
239
18cacd0b3ccf update tags
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diff changeset
240 Todo: (kono)
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diff changeset
241 NOPが廻り続けるという症状があるらしい。
421
f8916a96a373 (no commit message)
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diff changeset
242 Done: nop procotol は削除
393
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diff changeset
243
18cacd0b3ccf update tags
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diff changeset
244 Todo: (kono)
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diff changeset
245 Optimizer が、まだ、たこならしい。
387
6f356d160e58 IPv6 any address
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diff changeset
246
6f356d160e58 IPv6 any address
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diff changeset
247 Sun Oct 26 14:33:51 JST 2008
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248 Todo: (kono)
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249 quit/close 処理が間違っているらしい。
421
f8916a96a373 (no commit message)
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250 Done: quit は直しました
387
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diff changeset
251
6f356d160e58 IPv6 any address
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diff changeset
252 Sat Oct 25 10:52:05 JST 2008
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253 Todo: (kono)
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diff changeset
254 Editorからのmutli-sessoin の扱い、TestEditor でのmulti-session
6f356d160e58 IPv6 any address
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diff changeset
255 の実装。REPNode.handle の中でreadしちゃうと、handle 間での処理
6f356d160e58 IPv6 any address
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diff changeset
256 の引き渡しが出来ない。handlerの切替えにkeyは必要。
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diff changeset
257
6f356d160e58 IPv6 any address
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diff changeset
258 一つのeditorの中で、同じsessionに複数selectすると、コマンドを
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diff changeset
259 判定出来なくなる。今でも、新しくchannelを開けるなら複数セッション
6f356d160e58 IPv6 any address
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diff changeset
260 をselectすることは可能。channelで識別しているので。
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diff changeset
261 新しいeditorが作られてしまうので、ダメなケースの判定は、直接接続し
6f356d160e58 IPv6 any address
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diff changeset
262 ているSMでしか出来ない。と言うことは、selectのcancelのprotocolが
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diff changeset
263 必要らしい。それは、結構、面倒。command に source editor id を
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diff changeset
264 付けてやれば良いのだが...
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diff changeset
265
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266 Todo: (kono)
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diff changeset
267 text editor のバッファが増えるバグがあるらしい。
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diff changeset
268 Done: たぶん、quit/quit2が動いてない。close の処理のがまずいせい。
393
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diff changeset
269 merge にbugがったので、そのせいかも。
387
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270
386
bba62c4ac323 sync-option
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271 Fri Oct 24 19:00:50 JST 2008
387
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diff changeset
272 Note:
386
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273 XML に editor がselectされているかどうかのflagがあった方が良い。
bba62c4ac323 sync-option
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diff changeset
274 現状では、update はなんにも役に立たない。
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diff changeset
275
bba62c4ac323 sync-option
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diff changeset
276 Thu Oct 23 10:31:58 JST 2008
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diff changeset
277
bba62c4ac323 sync-option
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diff changeset
278 Todo: (kono)
bba62c4ac323 sync-option
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diff changeset
279 UPDATE/UPDATE_ACKが出ない。
bba62c4ac323 sync-option
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diff changeset
280 Done: Fri Oct 24 19:00:50 JST 2008
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diff changeset
281
385
1fca50ce3508 first-working-version
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282 Wed Oct 22 19:53:59 JST 2008
1fca50ce3508 first-working-version
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diff changeset
283
1fca50ce3508 first-working-version
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diff changeset
284 Todo: (kono)
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diff changeset
285 やっぱり、END_MERGEが繰り返し出るバグがあるらしい。
387
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diff changeset
286 Done: Thu Oct 23 10:12:27 JST 2008 merge confilict 時にmode setを
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diff changeset
287 忘れてました。
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diff changeset
288 結局、flag を入れて対症療法しました。
385
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parents: 375
diff changeset
289
373
ab4405cd3351 looks like we are done. Wait for further test.
kono
parents: 370
diff changeset
290 Wed Oct 22 02:31:27 JST 2008
ab4405cd3351 looks like we are done. Wait for further test.
kono
parents: 370
diff changeset
291
ab4405cd3351 looks like we are done. Wait for further test.
kono
parents: 370
diff changeset
292 Todo: (kono)
ab4405cd3351 looks like we are done. Wait for further test.
kono
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diff changeset
293 editorの中で、next.getEID() とか next.setQuit2() とかやっているのは、
ab4405cd3351 looks like we are done. Wait for further test.
kono
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diff changeset
294 ditributed の場合は、うまく動かない。だまって、forward されるはず
ab4405cd3351 looks like we are done. Wait for further test.
kono
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diff changeset
295 だが... やっぱり、dummy editor ではなくて、専用のものを作らないと
ab4405cd3351 looks like we are done. Wait for further test.
kono
parents: 370
diff changeset
296 だめ?
374
2b00e10394fd *** empty log message ***
kono
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diff changeset
297 Done: Wed Oct 22 02:56:30 JST 2008
387
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diff changeset
298 ちょっとあれだが、next がdirecgtでない場合を判断して、向こうの
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diff changeset
299 forwarder側で処理するのが簡単らしい。
375
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
300
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
301 Todo: (kono)
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
302 Select後のupdateを流してないので、他の人が、そのsessionがselectされたのを
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kono
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diff changeset
303 知り得ない。なので、複数のjoin_ackがありえる。
387
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parents: 386
diff changeset
304 Done: Sun Oct 26 17:39:05 JST 2008
373
ab4405cd3351 looks like we are done. Wait for further test.
kono
parents: 370
diff changeset
305
370
46c95d8885ad fix put_ack in single server test.
kono
parents: 364
diff changeset
306 Mon Oct 20 16:38:39 JST 2008
46c95d8885ad fix put_ack in single server test.
kono
parents: 364
diff changeset
307
46c95d8885ad fix put_ack in single server test.
kono
parents: 364
diff changeset
308 Todo: (kono)
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kono
parents: 364
diff changeset
309 routing で put の時には、上に上がるだけで良いのだが、下に行くときには、
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kono
parents: 364
diff changeset
310 routing table を持って行く必要がある。ということは、session list を
46c95d8885ad fix put_ack in single server test.
kono
parents: 364
diff changeset
311 つける必要があるということだね。でも、tree だから、
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kono
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312 自分の直下んあるもの以外は、上に送る
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313 で良いのか...
375
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
314 Done: Wed Oct 22 02:56:30 JST 2008
370
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kono
parents: 364
diff changeset
315
46c95d8885ad fix put_ack in single server test.
kono
parents: 364
diff changeset
316 Todo: (kono)
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kono
parents: 364
diff changeset
317 put/put_ack は、udpateを兼ねる必要があるらしい。そうでないと、session list
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kono
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diff changeset
318 が広まらない。
375
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
319 Done: Wed Oct 22 02:56:30 JST 2008
370
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kono
parents: 364
diff changeset
320 session list 中のlocalでないeditorをselectするした場合は、sessionManager
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kono
parents: 364
diff changeset
321 の方に再送してやれば良い。
375
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
322 Done: Wed Oct 22 02:56:30 JST 2008
34642bc65c21 *** empty log message ***
kono
parents: 374
diff changeset
323 SELECT0 を作成
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kono
parents: 374
diff changeset
324
364
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
325 Mon Oct 20 10:22:02 JST 2008
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
326
370
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kono
parents: 364
diff changeset
327 Todo: (kono)
364
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
328 Inter-session での、editor の削除、master でないeditorのclose/quit。
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f8916a96a373 (no commit message)
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diff changeset
329 Done: Wed Nov 26 15:19:07 JST 2008
f8916a96a373 (no commit message)
one
parents: 411
diff changeset
330 動いているらしい
364
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
331
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
332 Sun Oct 19 21:23:27 JST 2008
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
333
364
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
334 Todo: IPv6 対応 (kono)
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
335 getAddress で取れたアドレスには、すべて、select/connect する
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
336 必要がある。localhost な hostname よりも大域的なhostnameを
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kono
parents: 362
diff changeset
337 優先した方が良い。
393
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parents: 387
diff changeset
338 Done: server 側は対応。server側のconnect がまだ。
364
c965ef2b5fd6 *** empty log message ***
kono
parents: 362
diff changeset
339
361
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kono
parents: 358
diff changeset
340 Todo: dispatch先のEditorの作成 (kono)
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kono
parents: 358
diff changeset
341
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kono
parents: 358
diff changeset
342 Session は select 時に、channelを持つeditorが登録される。
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kono
parents: 358
diff changeset
343 外から来た場合は、新しくeditor を作って、それをsession
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kono
parents: 358
diff changeset
344 に登録する必要がある。SessionManagerの入口のforwarderを
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kono
parents: 358
diff changeset
345 session に登録してしまうと、Sessionが一つの時にしか動かない。
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kono
parents: 358
diff changeset
346
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kono
parents: 358
diff changeset
347 put_ack は、putの時にすぐに出してしまって構わない。select_ack
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kono
parents: 358
diff changeset
348 が廻るので、その時にput_ackを出しても良いが...
362
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kono
parents: 361
diff changeset
349 Done: Sun Oct 19 23:10:52 JST 2008
361
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kono
parents: 358
diff changeset
350
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kono
parents: 358
diff changeset
351 Todo: (kono)
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parents: 358
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352 複数のsessionのテストを作成する
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kono
parents: 358
diff changeset
353
358
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kono
parents: 345
diff changeset
354 Sat Oct 18 20:03:10 JST 2008
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kono
parents: 345
diff changeset
355
361
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kono
parents: 358
diff changeset
356 Todo: Routing Table (kono)
358
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kono
parents: 345
diff changeset
357
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parents: 345
diff changeset
358 Routing Table (Session, Editor)を作るには、上下双方向の通信が必要。
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kono
parents: 345
diff changeset
359 SessionID を master が作ると、一旦、multi cast した後、もう一度、
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kono
parents: 345
diff changeset
360 上に上げる必要がある。Select の時には、editor から上に上がるので、
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kono
parents: 345
diff changeset
361 その時に構築すれば良い。SessionManagerIDと組み合わせれば、eid/sid
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kono
parents: 345
diff changeset
362 ともに、下から構築出来る。
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kono
parents: 345
diff changeset
363
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
364 自分が出したjoin/put/sm_joinに対するackかどうかを見るために、
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kono
parents: 345
diff changeset
365 SessionManagerID は、どうせ必要。この方法だと、routing table
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kono
parents: 345
diff changeset
366 もSessionManagerIDに対してだけ構築すれば良い。とは、ならない。
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kono
parents: 345
diff changeset
367 Session は、複数のSessionManagerにまたがるので。
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kono
parents: 345
diff changeset
368
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kono
parents: 345
diff changeset
369 join_ack が来た時には、そのeditorのrouting tableは完成している、
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kono
parents: 345
diff changeset
370 あるいは、select が完成させるjoin_ackに追い付くことはない。
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kono
parents: 345
diff changeset
371 put_ack も同様。
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kono
parents: 345
diff changeset
372
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kono
parents: 345
diff changeset
373 select は、editorへのpathを探しながら、session routing table
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kono
parents: 345
diff changeset
374 を構築する。もっとも高位のsession managerへのrouting table
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
375 は、これで作成される。ここからjoinしたeditorまでのpathは、
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
376 そのeditor単一のpathだが、routing table に登録される。
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kono
parents: 345
diff changeset
377 select は、session ringに到達した時点で update を流す。
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kono
parents: 345
diff changeset
378 update は、木をさかのぼりrouting tableを構築する。
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kono
parents: 345
diff changeset
379 これで上方向のroutingは確定する。update_ackにより、
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kono
parents: 345
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380 下方向のsesionn routing tableが確定する。
361
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kono
parents: 358
diff changeset
381 Done: Sun Oct 19 21:29:08 JST 2008
358
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kono
parents: 345
diff changeset
382
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
383 Wed Oct 15 13:33:58 JST 2008
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
384
361
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kono
parents: 358
diff changeset
385 Todo: (kono)
358
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kono
parents: 345
diff changeset
386
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kono
parents: 345
diff changeset
387 Session List を渡すタイミング
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kono
parents: 345
diff changeset
388
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kono
parents: 345
diff changeset
389 SM_JOIN_ACK (必須...)
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kono
parents: 345
diff changeset
390 SM_JOIN では、Session List は0なはず。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
391 JOIN,PUT は、multi-cast されるので、その時に登録すれば良い。
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kono
parents: 345
diff changeset
392 その時に、Session List を送っても良いが...
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
393 SELECTは、joinするeditorからしか出ない。Session List は必要ない。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
394 SELECT_ACK は、UPDATEが出るので必要ない
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
395 UPDATE,UPDATE_ACK には、Session List が付く
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
396 GATHER,GATHER_ACK には、Session List が付く
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
397
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
398 Session List では、editor,session に対するroutingも作成する、必要
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
399 な情報を含む必要がある。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
400 eid, EditorName, FileName, sid, SessionManagerName
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
401 SessionManagerName が入っていれば、editor, session が
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
402 Session Listが来た方向にいるということになる。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
403
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
404 SessionManagerName は、network 上でuniqueな必要がある。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
405 sm_join した時に、そのchannelの名前が大域的に確定する。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
406 sm_join は複数行なわれないから、名前が変わることはない。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
407 sm_join された側の名前も、接続されて初めて確定する。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
408 複数 sm_join されることはあるが、その場合は最初のもの
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
409 を使う。ということは、localにsm_join された後、大域的
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
410 に接続される場合があるってことか。ってことは、やっぱり、
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
411 session manager id を配布するべきだってことね。で、
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
412 SMの名前はあくまでも補助的に使う。
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
413 Done: Sun Oct 19 21:29:08 JST 2008
358
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
414
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
415 Todo: (kono)
358
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kono
parents: 345
diff changeset
416 UPDATEの情報によって削除も行なう。delete entry が必要。
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
417
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
418 Todo: (kono)
358
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kono
parents: 345
diff changeset
419 Routing Table
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
420 <eid, channel>
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
421 <sid, channel>
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
422 null は、local。channel==parent なら、自分の下にはいない。
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
423 Done: Sun Oct 19 21:29:08 JST 2008
358
034acadc0cdc *** empty log message ***
kono
parents: 345
diff changeset
424
345
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kono
parents: 344
diff changeset
425 Tue Oct 14 06:02:37 JST 2008
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
426
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
427 Todo: (kono)
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
428 取りあえず、sm_join()からか。次は、join(),put()。そして、
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
429 update()。select()。
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
430 Done: Sun Oct 19 21:29:08 JST 2008
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
431
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
432 Todo: (kono)
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kono
parents: 358
diff changeset
433 最後に、gather()。
345
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
434
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
435 Todo: (kono)
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
436 Select用に、routing tableが必要らしい。session ringへの
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
437 方向を表すtableを、put, update, update_ack時に作成する。
362
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kono
parents: 361
diff changeset
438 Done: Sun Oct 19 21:29:08 JST 2008
345
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
439
343
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
440 Mon Oct 13 12:34:39 JST 2008
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kono
parents: 341
diff changeset
441
344
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kono
parents: 343
diff changeset
442 Todo: (kono)
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kono
parents: 343
diff changeset
443 sm_join時のloop の検出。sm_joinを受け取った時には、sm接続にloopが
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
444 あるかどうかを調べる必要がある。これのテストも必要。
345
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
445 host_aからのsm_joinを受け取ったら、sm_join(host_a)を親に送る。
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
446 host_aがsm_join(host_a)を受け取ったら、それはloop。親がsm_join
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
447 を受け取れば、そこからsm_join_ackを流して終了。
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
448 Done: Sun Oct 19 21:29:08 JST 2008
344
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
449
343
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
450 Note: (kono)
344
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
451 複数のsession managerにsm_joinする場合もある。その場合は、
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
452 親に代わりにsm_joinしてもらう? 親がreachableだとは限りませんが。
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
453 禁止してもいいけど...
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
454
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
455 sessionを持っているsm同士がsm_joinするとsidを付け直す必要が
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
456 ある。これは大変だなぁ。これも禁止? join/select待ちは許される。
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
457 まぁ、新しくsmを上げれば良いだけなんだが、内部的になんとか出来ないの?
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
458 面倒なので、取りあえず禁止で良いです。もしかして、updateって、
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
459 それよう?
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
460
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
461 sidのnatという手はあるのか。かなり複雑だけど。それだと複数の親が
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
462 いてもだいじょうぶか? ちゃんと書き換え出来るなら動くっぽい。あとで
345
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
463 入れることも可能か。
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
464
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
465 selectが以外に難しい。sessionとjoinして来たeditorを見つけない
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
466 といけない。しかも、最短距離で。見つけるだけなら簡単だが... 取りあえず、
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
467 select は、join したsession managerでしか出来ないということに
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
468 する。そうでないと、joinしたeditorを探す必要があり、全部を見るか、
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
469 routing tableを作る必要がある。後者でも良いが。
344
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
470
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
471 Note: (kono)
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
472 Session間の通信は、木を作って、自分の親に送り、親がack/updateをmulti cast
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
473 すれば良い。sm_join した時に、どちらが親になるかはどうやって決める? 繋げた先が
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
474 親ってのが簡単。親がいないのがmasterとなる。親が死んだら自分が親。親が死んで、
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
475 sessionがmasterを失った時は? loop の検出も必要。
343
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
476 再接続は可能? 可能だが、再put/join/selectする必要がある。
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
477 put は、親まで上がってsidを決定しなければならない、その後、put_ackを出せる。
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
478 joinは、localでの処理で問題ないが、join_ackはselectが終わってから出る必要がある。
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
479 selectは session owner に行き着く必要がある。session がconnectionを
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
480 持っているとは限らない。親がselectする方が自然か?
344
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
481 put_ack/join_ack/select_ackは、updateを見てでの処理で良い? 対象イベント
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
482 が明示されていた方が楽だが...
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
483 この方法だと、session managerはidは持っていないが、木構造の中でuniqeな
d07414ff79d3 *** empty log message ***
kono
parents: 343
diff changeset
484 位置を持つ。
343
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
485 (前の資料があれば良いのに...)
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
486
341
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
487 Mon Oct 13 02:57:45 JST 2008
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
488 Todo: (kono)
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
489 InterManagerのquit中のsessionへのjoinの扱い。(putは来ないがjoinはありえる)。
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
490 UPDATEで、sessionをlockしてからquitするか?
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
491 TestGUIで、selectする前にEditor0がquitしちゃう場合もある。
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
492
343
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
493 Todo: (kono)
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
494 SessionManager間のプロトコルの図が、どこにもない。あんなに苦労して考えたのに。
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
495 また、自分で書けってか。
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
496  SessionManager SM_JOINと、masterの決定
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
497  put/selectの生成、masterによるsession id の決定
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
498 updateによるsessionの共有
345
a092a8fe9d97 *** empty log message ***
kono
parents: 344
diff changeset
499 Done:Mon Oct 13 19:02:42 JST 2008 (kono)
343
21ad256c25c2 *** empty log message ***
kono
parents: 341
diff changeset
500
338
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
501 Sun Oct 12 19:12:20 JST 2008
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
502
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
503 Todo: (kono)
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
504 DELETE時のundoのための文字列は、SM/Editor間でだけ必要。Editorから戻って来た
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
505 コマンドをSM側で最新にする必要がある。外に出す時には使わないので消して良い。
339
bb9e202af4d8 *** empty log message ***
kono
parents: 338
diff changeset
506 Done: 戻って来た時に、unMergedListに入れているらしい
bb9e202af4d8 *** empty log message ***
kono
parents: 338
diff changeset
507
bb9e202af4d8 *** empty log message ***
kono
parents: 338
diff changeset
508 Todo: (kono)
341
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
509 new String(hoge)。Javaの文字列は変更不可能なので、こんな
339
bb9e202af4d8 *** empty log message ***
kono
parents: 338
diff changeset
510 ことをする意味はない。
bb9e202af4d8 *** empty log message ***
kono
parents: 338
diff changeset
511 Done:
338
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
512
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
513 Todo: (kono)
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
514 PUT の時に、master session managerまで行って、session番号を確定する
bcb4ea4ff208 *** empty log message ***
kono
parents: 334
diff changeset
515 必要がある。それまでは、PUT_ACKを出してはならない。
361
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kono
parents: 358
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516 Done: Sun Oct 19 21:29:08 JST 2008
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kono
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517 session manager IDを使ってuniqueにしたので、不要になった。
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kono
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518 即座に PUT_ACKを出して構わない。
338
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kono
parents: 334
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519
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kono
parents: 334
diff changeset
520 Todo: (kono)
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kono
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521 SM_JOIN時にmaster session managerを決定するプロトコルを実装する必要が
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kono
parents: 334
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522 ある。たぶん、UPDATEだと思うが...
361
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kono
parents: 358
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523 Done: Sun Oct 19 21:29:08 JST 2008
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kono
parents: 358
diff changeset
524 木の根をmasterとして、変更しない。
338
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kono
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diff changeset
525
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kono
parents: 334
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526 Todo: (kono)
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kono
parents: 334
diff changeset
527 外から、きたSession Listを、ただしく自分に反映する。
361
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kono
parents: 358
diff changeset
528 Done: Sun Oct 19 21:29:08 JST 2008
338
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kono
parents: 334
diff changeset
529
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kono
parents: 334
diff changeset
530 Todo: (kono)
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kono
parents: 334
diff changeset
531 test.ServerSample.java はあるが、ClientSample.java がない。
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kono
parents: 334
diff changeset
532
341
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
533 Todo: (kono)
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kono
parents: 340
diff changeset
534 SYNC出すコードをまだ入れてない。
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kono
parents: 340
diff changeset
535
334
4fae49280699 Test pattern for Inter-Session Manager communication
kono
parents: 330
diff changeset
536 Sun Oct 12 10:33:36 JST 2008
4fae49280699 Test pattern for Inter-Session Manager communication
kono
parents: 330
diff changeset
537
4fae49280699 Test pattern for Inter-Session Manager communication
kono
parents: 330
diff changeset
538 Todo:
4fae49280699 Test pattern for Inter-Session Manager communication
kono
parents: 330
diff changeset
539 END_MERGEが繰り返し出てしまう(kono)
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
540 Done: Sun Oct 19 21:29:08 JST 2008
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kono
parents: 358
diff changeset
541 直ったかな?
334
4fae49280699 Test pattern for Inter-Session Manager communication
kono
parents: 330
diff changeset
542
330
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kono
parents: 323
diff changeset
543 Sat Oct 11 22:28:49 JST 2008
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kono
parents: 323
diff changeset
544
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kono
parents: 323
diff changeset
545 Todo:
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kono
parents: 323
diff changeset
546 Session Manager をまたがった接続のテスト (kono)
338
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kono
parents: 334
diff changeset
547 Done: Sun Oct 12 19:18:23 JST 2008
330
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kono
parents: 323
diff changeset
548
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kono
parents: 323
diff changeset
549 Todo:
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kono
parents: 323
diff changeset
550 Optimizerを使った場合のテスト (kono)
334
4fae49280699 Test pattern for Inter-Session Manager communication
kono
parents: 330
diff changeset
551 行番号0があるとだめらしい。
386
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parents: 385
diff changeset
552 Done: (takano) Thu Oct 23 13:05:52 JST 2008
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parents: 385
diff changeset
553
330
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kono
parents: 323
diff changeset
554
ddfc786811b9 *** empty log message ***
kono
parents: 323
diff changeset
555 Todo:
340
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kono
parents: 339
diff changeset
556 manager.remove(editor) の動作のタイミング、 channel closeの扱い
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kono
parents: 339
diff changeset
557 たぶん、quit2のackで、殺すのが正しいと思う。(kono)
341
a9a740e685fa remove session using QUIT_2_ACK
kono
parents: 340
diff changeset
558 Done: Mon Oct 13 02:57:45 JST 2008
330
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kono
parents: 323
diff changeset
559
ddfc786811b9 *** empty log message ***
kono
parents: 323
diff changeset
560
322
5893fd8c0f50 *** empty log message ***
kono
parents: 315
diff changeset
561 Fri Oct 10 15:24:42 JST 2008
323
1e605880d49e *** empty log message ***
kono
parents: 322
diff changeset
562 sid は大域的にuniqueにする必要がある。UPDATEで新しくsessionを作ったことを
1e605880d49e *** empty log message ***
kono
parents: 322
diff changeset
563 通知して、Masterが新しいsidを決定し、UPDATE_ACKで他のSessionManagerに知らせる(kono)
361
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
564 Done: Sun Oct 19 21:29:08 JST 2008
65c6d12a5835 *** empty log message ***
kono
parents: 358
diff changeset
565 put時に、そのsession managerでsession manager idを使って、
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kono
parents: 358
diff changeset
566 uniqueなsidを作成する。put/join/ackで他のSessionManagerに知らせる。
322
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kono
parents: 315
diff changeset
567
315
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kono
parents: 305
diff changeset
568 Mon Oct 6 16:39:57 JST 2008
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kono
parents: 305
diff changeset
569
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kono
parents: 305
diff changeset
570 Todo: translator にある5つのqueueが、Editor にもある。merge のアルゴリズムの
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kono
parents: 305
diff changeset
571 実装を見直す必要がある。(kono)
330
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kono
parents: 323
diff changeset
572 Done:Sat Oct 11 22:28:49 JST 2008
315
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kono
parents: 305
diff changeset
573
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kono
parents: 305
diff changeset
574 Todo:
386
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parents: 385
diff changeset
575 SessionManager の向うにあるeditorにREPCommandを送るコードがない。Editor 扱いしても良いが、
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parents: 385
diff changeset
576 Editor が複雑すぎるので、それは好ましくない。Editor に nextChannelを持たせるのが良いか? (kono)
323
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kono
parents: 322
diff changeset
577 Done: Forwarder を作った
315
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kono
parents: 305
diff changeset
578
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kono
parents: 305
diff changeset
579 Todo:
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kono
parents: 305
diff changeset
580 SessionManger のeditor がmerge 中のeditor commandをblockするのは良いが、
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kono
parents: 305
diff changeset
581 sessionManger コマンドをblockされるのは困る。(kono)
330
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kono
parents: 323
diff changeset
582 Done: Sat Oct 11 22:28:49 JST 2008
305
ffd8bb47b188 *** empty log message ***
kono
parents: 304
diff changeset
583
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kono
parents: 304
diff changeset
584 Wed Oct 1 20:58:51 JST 2008
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kono
parents: 304
diff changeset
585
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kono
parents: 304
diff changeset
586 Todo: Session ring 廻るcommand packetは、基本的に書き換えられるべきではない
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kono
parents: 304
diff changeset
587   eid, seq の組でuniqueになる。現状では、そここで書き換えが起きているらしい。
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kono
parents: 304
diff changeset
588 eid = -1 (Session Manager), eid = -2 (MergeCommand) あたりが
315
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kono
parents: 305
diff changeset
589 特殊らしい。 でも、実際には生成されてないっぽい。(kono)
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kono
parents: 305
diff changeset
590 Done: Mon Oct 6 16:40:14 JST 2008 (kono)
305
ffd8bb47b188 *** empty log message ***
kono
parents: 304
diff changeset
591
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kono
parents: 304
diff changeset
592 Todo: SessionManagerのprotocolのswitch文で、そこら中でgetEditor/getSessionが
315
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
593   呼ばれている。これらは、for loopで探しているので、繰り返し行うのは変。(kono)
305
ffd8bb47b188 *** empty log message ***
kono
parents: 304
diff changeset
594
315
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
595 Todo: REPCMD_INSERTが止まらない... (kono)
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
596 Done: Mon Oct 6 16:40:38 JST 2008 (kono)
305
ffd8bb47b188 *** empty log message ***
kono
parents: 304
diff changeset
597
315
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kono
parents: 305
diff changeset
598 Todo: SessionMnager のmessageをREPLogger baseに書き換える。 (kono)
386
bba62c4ac323 sync-option
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parents: 385
diff changeset
599 Done: Thu Oct 23 13:05:52 JST 2008
bba62c4ac323 sync-option
one@firefly.cr.ie.u-ryukyu.ac.jp
parents: 385
diff changeset
600
300
8f6b7a1890b2 *** empty log message ***
kono
parents:
diff changeset
601 Wed Oct 1 15:35:44 JST 2008
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kono
parents:
diff changeset
602
315
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
603 Todo: SessionManager 複数のコマンドをまとめてeditorに送るとdead lockする
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
604 可能性がある。送信キューを作り、select loop しながら、ひとつずつコマンドを
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
605 送信する (kono)
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
606 Done: (kono)
300
8f6b7a1890b2 *** empty log message ***
kono
parents:
diff changeset
607
8f6b7a1890b2 *** empty log message ***
kono
parents:
diff changeset
608 Todo: Editor quit, quit2 の実装
8f6b7a1890b2 *** empty log message ***
kono
parents:
diff changeset
609   quit2 では、自分の送信したコマンドが戻ってくるまで待つ必要がある。
315
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
610   editor 毎の状態となる。(kono)
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kono
parents: 305
diff changeset
611 Done: (kono)
20fb70068089 *** empty log message ***
kono
parents: 305
diff changeset
612