forked from apache/dubbo-website
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Bad+Smell-zh-showComments=true&showCommentArea=true.htm
1517 lines (1167 loc) · 98.9 KB
/
Bad+Smell-zh-showComments=true&showCommentArea=true.htm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE html>
<html>
<head>
<title>Bad Smell-zh - Dubbo - Alibaba Open Sesame</title>
<meta http-equiv="X-UA-Compatible" content="IE=8">
<meta charset="UTF-8">
<!-- Deprecated since 3.4. To be removed in a future version of Confluence; use AJS.Confluence.getContextPath() -->
<meta id="confluence-context-path" name="confluence-context-path" content="/wiki">
<meta name="ajs-context-path" content="/wiki">
<meta name="ajs-version-number" content="3.5.9">
<meta name="ajs-build-number" content="2166">
<meta id="atlassian-token" name="atlassian-token" content="c116db80711201b36e2067aa83f3b044c2d5a30e">
<meta id="confluence-space-key" name="confluence-space-key" content="dubbo">
<meta name="ajs-remote-user" content="">
<meta name="ajs-static-resource-url-prefix" content="/wiki/s/en/2166/34/_">
<script type="text/javascript">
// Deprecated global variables. To be removed in a future version of Confluence.
var contextPath = '/wiki';
</script>
<!-- include system css resources -->
<link type="text/css" rel="stylesheet" href="batch.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/26/_/download/superbatch/css/batch.css" media="all">
<!--[if IE]>
<link type="text/css" rel="stylesheet" href="batch.css-ieonly=true.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/26/_/download/superbatch/css/batch.css?ieonly=true" media="all">
<![endif]-->
<link type="text/css" rel="stylesheet" href="batch.css-media=print.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/26/_/download/superbatch/css/batch.css?media=print" media="print">
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.ext.newcode-macro-plugin-syntaxhighlighter.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.9.10/_/download/batch/com.atlassian.confluence.ext.newcode-macro-plugin:syntaxhighlighter/com.atlassian.confluence.ext.newcode-macro-plugin:syntaxhighlighter.css" media="all">
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.ext.newcode-macro-plugin-sh-theme-confluence.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.9.10/_/download/batch/com.atlassian.confluence.ext.newcode-macro-plugin:sh-theme-confluence/com.atlassian.confluence.ext.newcode-macro-plugin:sh-theme-confluence.css" media="all">
<link type="text/css" rel="stylesheet" href="confluence-forms.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/resources/confluence.web.resources:aui-forms/confluence-forms.css" media="all">
<!--[if IE]>
<link type="text/css" rel="stylesheet" href="confluence.web.resources-aui-forms.css-ieonly=true.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:aui-forms/confluence.web.resources:aui-forms.css?ieonly=true" media="all">
<![endif]-->
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.plugins.share-page-mail-page-resources.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.8/_/download/batch/com.atlassian.confluence.plugins.share-page:mail-page-resources/com.atlassian.confluence.plugins.share-page:mail-page-resources.css" media="all">
<link type="text/css" rel="stylesheet" href="confluence.web.resources-view-comment.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:view-comment/confluence.web.resources:view-comment.css" media="all">
<!--[if IE]>
<link type="text/css" rel="stylesheet" href="confluence.web.resources-view-comment.css-ieonly=true.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:view-comment/confluence.web.resources:view-comment.css?ieonly=true" media="all">
<![endif]-->
<link type="text/css" rel="stylesheet" href="confluence.macros.advanced-fancy-box.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.16/_/download/batch/confluence.macros.advanced:fancy-box/confluence.macros.advanced:fancy-box.css" media="all">
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.plugins.drag-and-drop-support.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0.16/_/download/batch/com.atlassian.confluence.plugins.drag-and-drop:support/com.atlassian.confluence.plugins.drag-and-drop:support.css" media="all">
<link type="text/css" rel="stylesheet" href="confluence.extra.jira-macro-browser-resources.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.1.2/_/download/batch/confluence.extra.jira:macro-browser-resources/confluence.extra.jira:macro-browser-resources.css" media="all">
<link type="text/css" rel="stylesheet" href="confluence.web.resources-page-editor.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:page-editor/confluence.web.resources:page-editor.css" media="all">
<!--[if IE]>
<link type="text/css" rel="stylesheet" href="confluence.web.resources-page-editor.css-ieonly=true.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:page-editor/confluence.web.resources:page-editor.css?ieonly=true" media="all">
<![endif]-->
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.tinymceplugin-editor-resources.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.tinymceplugin:editor-resources/com.atlassian.confluence.tinymceplugin:editor-resources.css" media="all">
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.plugins.linkbrowser-linkbrowser-resources.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources.css" media="all">
<!--[if IE]>
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.plugins.linkbrowser-linkbrowser-resources.css-ieonly=true.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources.css?ieonly=true" media="all">
<![endif]-->
<link type="text/css" rel="stylesheet" href="confluence-draft-changes-draft-changes.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence-draft-changes:draft-changes/confluence-draft-changes:draft-changes.css" media="all">
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.plugins.jira.jira-connector-dialogsJs.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/com.atlassian.confluence.plugins.jira.jira-connector:dialogsJs/com.atlassian.confluence.plugins.jira.jira-connector:dialogsJs.css" media="all">
<link type="text/css" rel="stylesheet" href="com.atlassian.plugins.shortcuts.atlassian-shortcuts-module-shortcuts.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/0.8/_/download/batch/com.atlassian.plugins.shortcuts.atlassian-shortcuts-module:shortcuts/com.atlassian.plugins.shortcuts.atlassian-shortcuts-module:shortcuts.css" media="all">
<link type="text/css" rel="stylesheet" href="com.atlassian.confluence.keyboardshortcuts-confluence-keyboard-shortcuts.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.keyboardshortcuts:confluence-keyboard-shortcuts/com.atlassian.confluence.keyboardshortcuts:confluence-keyboard-shortcuts.css" media="all">
<!-- end system css resources -->
<link rel="stylesheet" href="combined.css-spaceKey=dubbo.css" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3/_/styles/combined.css?spaceKey=dubbo" type="text/css">
<meta name="confluence-request-time" content="1392025749595">
<meta name="loggedInUsername" content="">
<meta name="ajs-keyboardshortcut-hash" content="bf02a79603372a43d395a0a429bdf66">
<!-- Deprecated since 3.4. To be removed in a future version of Confluence; use atl.header -->
<script type="text/x-template" title="share-content-popup">
<form action="#" method="post" class="aui share-content-popup">
<fieldset>
<label for="users">User name or email</label>
<div class="autocomplete-user-target">
<input class="text autocomplete-sharepage" id="users" data-max="10" data-dropdown-target=".autocomplete-user-target" data-none-message="No matching user or email found"/>
</div>
<ol class="recipients">
</ol>
<div><label for="note">Note</label></div>
<textarea class="textarea" id="note" placeholder="Add an optional note"/>
</fieldset>
<div class="button-panel">
<div class="progress-messages-icon"></div>
<div class="progress-messages">
</div>
<input class="button submit" type="submit" value="Share" disabled/>
<a class="close-dialog" href="#">Cancel</a>
</div>
</form>
</script>
<script type="text/x-template" title="share-content-popup-recipient-username">
<li data-username="{username}" style="display: none">
<span>
<img src="{thumbnailLink.href}" title="{title}">
<span>{title}</span>
<span class="remove-recipient"/>
</span>
</li>
</script>
<script type="text/x-template" title="share-content-popup-recipient-email">
<li data-email="{email}" style="display: none">
<span>
<img src="{icon}" title="{email}">
<span>{email}</span>
<span class="remove-recipient"/>
</span>
</li>
</script>
<meta name="ajs-use-keyboard-shortcuts" content="true">
<link rel="shortcut icon" href="/wiki/favicon.ico">
<link rel="icon" type="image/png" href="/wiki/s/en/2166/34/_/images/logo/confluence_16.png">
<link rel="search" type="application/opensearchdescription+xml" href="/wiki/opensearch/osd.action" title="Alibaba Open Sesame"/>
<!-- include system javascript resources -->
<script type="text/javascript" src="batch.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/26/_/download/superbatch/js/batch.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.ext.newcode-macro-plugin-syntaxhighlighter.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.9.10/_/download/batch/com.atlassian.confluence.ext.newcode-macro-plugin:syntaxhighlighter/com.atlassian.confluence.ext.newcode-macro-plugin:syntaxhighlighter.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.ext.newcode-macro-plugin-syntaxhighlighter-brushes.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.9.10/_/download/batch/com.atlassian.confluence.ext.newcode-macro-plugin:syntaxhighlighter-brushes/com.atlassian.confluence.ext.newcode-macro-plugin:syntaxhighlighter-brushes.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.share-page-mail-page-resources.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.8/_/download/batch/com.atlassian.confluence.plugins.share-page:mail-page-resources/com.atlassian.confluence.plugins.share-page:mail-page-resources.js" ></script>
<script type="text/javascript" src="confluence.macros.advanced-fancy-box.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.16/_/download/batch/confluence.macros.advanced:fancy-box/confluence.macros.advanced:fancy-box.js" ></script>
<script type="text/javascript" src="confluence.macros.advanced-thumbnail-images.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.16/_/download/batch/confluence.macros.advanced:thumbnail-images/confluence.macros.advanced:thumbnail-images.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.drag-and-drop-support.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0.16/_/download/batch/com.atlassian.confluence.plugins.drag-and-drop:support/com.atlassian.confluence.plugins.drag-and-drop:support.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.drag-and-drop-drag-and-drop-for-view-content.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0.16/_/download/batch/com.atlassian.confluence.plugins.drag-and-drop:drag-and-drop-for-view-content/com.atlassian.confluence.plugins.drag-and-drop:drag-and-drop-for-view-content.js" ></script>
<script type="text/javascript" src="confluence.web.resources-page-editor.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:page-editor/confluence.web.resources:page-editor.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.tinymceplugin-editor-resources.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.tinymceplugin:editor-resources/com.atlassian.confluence.tinymceplugin:editor-resources.js" ></script>
<script type="text/javascript" src="linkbrowser.nocache.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/resources/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources/war/linkbrowser/linkbrowser.nocache.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.linkbrowser-linkbrowser-resources.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources/com.atlassian.confluence.plugins.linkbrowser:linkbrowser-resources.js" ></script>
<script type="text/javascript" src="confluence-draft-changes-draft-changes.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence-draft-changes:draft-changes/confluence-draft-changes:draft-changes.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.tinymceplugin-editor-autocomplete-resources.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.tinymceplugin:editor-autocomplete-resources/com.atlassian.confluence.tinymceplugin:editor-autocomplete-resources.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.tinymceplugin-editor-autocomplete-links.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.tinymceplugin:editor-autocomplete-links/com.atlassian.confluence.tinymceplugin:editor-autocomplete-links.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.tinymceplugin-editor-autocomplete-media.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.tinymceplugin:editor-autocomplete-media/com.atlassian.confluence.tinymceplugin:editor-autocomplete-media.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.tinymceplugin-editor-autocomplete-macros.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.tinymceplugin:editor-autocomplete-macros/com.atlassian.confluence.tinymceplugin:editor-autocomplete-macros.js" ></script>
<script type="text/javascript" src="com.atlassian.applinks.applinks-plugin-applinks-util-js.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.3/_/download/batch/com.atlassian.applinks.applinks-plugin:applinks-util-js/com.atlassian.applinks.applinks-plugin:applinks-util-js.js" ></script>
<script type="text/javascript" src="com.atlassian.applinks.applinks-plugin-applinks-oauth-ui.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.3/_/download/batch/com.atlassian.applinks.applinks-plugin:applinks-oauth-ui/com.atlassian.applinks.applinks-plugin:applinks-oauth-ui.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.jira.jira-connector-proxy-js.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/com.atlassian.confluence.plugins.jira.jira-connector:proxy-js/com.atlassian.confluence.plugins.jira.jira-connector:proxy-js.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.jira.jira-connector-dialogsJs.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/com.atlassian.confluence.plugins.jira.jira-connector:dialogsJs/com.atlassian.confluence.plugins.jira.jira-connector:dialogsJs.js" ></script>
<script type="text/javascript" src="confluence.web.resources-help-content-resources.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/confluence.web.resources:help-content-resources/confluence.web.resources:help-content-resources.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.drag-and-drop-drag-and-drop-for-editor.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0.16/_/download/batch/com.atlassian.confluence.plugins.drag-and-drop:drag-and-drop-for-editor/com.atlassian.confluence.plugins.drag-and-drop:drag-and-drop-for-editor.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.drag-and-drop-drop-zone-for-image-dialog.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0.16/_/download/batch/com.atlassian.confluence.plugins.drag-and-drop:drop-zone-for-image-dialog/com.atlassian.confluence.plugins.drag-and-drop:drop-zone-for-image-dialog.js" ></script>
<script type="text/javascript" src="com.atlassian.gadgets.embedded-gadget-core-resources.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/2.0.8/_/download/batch/com.atlassian.gadgets.embedded:gadget-core-resources/com.atlassian.gadgets.embedded:gadget-core-resources.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.gadgets-macro-browser-for-gadgetsplugin.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.1.5/_/download/batch/com.atlassian.confluence.plugins.gadgets:macro-browser-for-gadgetsplugin/com.atlassian.confluence.plugins.gadgets:macro-browser-for-gadgetsplugin.js" ></script>
<script type="text/javascript" src="confluence.macros.core-macro-browser-smart-fields.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/confluence.macros.core:macro-browser-smart-fields/confluence.macros.core:macro-browser-smart-fields.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.plugins.doctheme-splitter.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.9/_/download/batch/com.atlassian.confluence.plugins.doctheme:splitter/com.atlassian.confluence.plugins.doctheme:splitter.js" ></script>
<script type="text/javascript" src="com.atlassian.plugins.shortcuts.atlassian-shortcuts-module-shortcuts.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/0.8/_/download/batch/com.atlassian.plugins.shortcuts.atlassian-shortcuts-module:shortcuts/com.atlassian.plugins.shortcuts.atlassian-shortcuts-module:shortcuts.js" ></script>
<script type="text/javascript" src="com.atlassian.confluence.keyboardshortcuts-confluence-keyboard-shortcuts.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/3.5.9/_/download/batch/com.atlassian.confluence.keyboardshortcuts:confluence-keyboard-shortcuts/com.atlassian.confluence.keyboardshortcuts:confluence-keyboard-shortcuts.js" ></script>
<script type="text/javascript" src="legacy.confluence.web.resources-prototype.js" tppabs="http://10.20.160.198/wiki/s/en/2166/34/1.0/_/download/batch/legacy.confluence.web.resources:prototype/legacy.confluence.web.resources:prototype.js" ></script>
<!-- end system javascript resources -->
<link rel="canonical" href="http://code.alibabatech.com/wiki/display/dubbo/Bad+Smell-zh">
<link rel="shortlink" href="http://code.alibabatech.com/wiki/x/lw9q">
<meta name="wikilink" content="[dubbo:Bad Smell-zh]">
<meta name="page-version" content="9">
</head>
<body onload="placeFocus()"
id="com-atlassian-confluence" class="theme-default ">
<ul id="assistive-skip-links" class="assistive">
<li><a href="#title-heading">Skip to content</a></li>
<li><a href="#breadcrumbs">Skip to breadcrumbs</a></li>
<li><a href="#header-menu-bar">Skip to header menu</a></li>
<li><a href="#navigation">Skip to action menu</a></li>
<li><a href="#quick-search-query">Skip to quick search</a></li>
</ul>
<div id="page">
<div id="full-height-container">
<fieldset class="hidden parameters">
<input type="hidden" id="shortcutDialogTip" value="Shortcut tip: Pressing <b>{shortcut}</b> also opens this dialog box">
<input type="hidden" title="i18n.close.name" value="Close">
<input type="hidden" title="i18n.cancel.name" value="Cancel">
</fieldset><fieldset class="hidden parameters">
<input type="hidden" id="statusDialogHeading" value="What are you working on?">
<input type="hidden" id="statusDialogAccessibilityLabel" value="Enter your status (140 character limit)">
<input type="hidden" id="statusDialogLatestLabel" value="Last update:">
<input type="hidden" id="statusDialogUpdateButtonLabel" value="Update">
<input type="hidden" id="statusDialogCancelButtonLabel" value="Cancel">
</fieldset>
<fieldset class="hidden parameters">
<input type="hidden" id="globalSettingsAttachmentMaxSize" value="10485760">
<input type="hidden" id="userLocale" value="en_GB">
<input type="hidden" id="staticResourceUrlPrefix" value="/wiki/s/en/2166/34/_">
<input type="hidden" id="contextPath" value="/wiki">
</fieldset>
<div id="header" class="" style="display: none">
<form id="quick-search" class="quick-search" method="get" action="http://10.20.160.198/wiki/dosearchsite.action">
<fieldset>
<label class="assistive" for="quick-search-query">Quick Search</label>
<input class="quick-search-query" id="quick-search-query" type="text" accessKey="q" autocomplete="off" name="queryString" size="25" title="Quick Search" />
<input class="quick-search-submit" id="quick-search-submit" type="submit" value="Search" />
<div class="aui-dd-parent quick-nav-drop-down"><!-- Quick nav appears here --></div>
</fieldset>
<fieldset class="hidden parameters">
<input type="hidden" id="quickNavEnabled" value="true" />
</fieldset>
</form>
<ul id="header-menu-bar" class="ajs-menu-bar">
<li class="normal ajs-menu-item">
<a id="browse-menu-link" class="browse trigger ajs-menu-title" href="#"><span><span>Browse</span></span></a> <div class="assistive ajs-drop-down">
<ul id="browse-menu-link-leading" class="section-leading first">
<li>
<a id="space-pages-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/listpages.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/listpages.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/pages/listpages.action?key=dubbo" class="" title="Browse pages in the Dubbo space">
<span>Pages</span></a> </li>
<li>
<a id="space-blogposts-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewrecentblogposts.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewrecentblogposts.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/pages/viewrecentblogposts.action?key=dubbo" class="" title="Browse blogs in the Dubbo space">
<span>Blog</span></a> </li>
<li>
<a id="space-labels-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/labels/listlabels-heatmap.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/labels/listlabels-heatmap.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/labels/listlabels-heatmap.action?key=dubbo" class="" title="Browse labels in the Dubbo space">
<span>Labels</span></a> </li>
<li>
<a id="space-attachments-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/spaces/listattachmentsforspace.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/spaces/listattachmentsforspace.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/spaces/listattachmentsforspace.action?key=dubbo" class="" title="Browse attachments in the Dubbo space">
<span>Attachments</span></a> </li>
<li>
<a id="space-mail-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/spaces/viewmailarchive.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/spaces/viewmailarchive.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/spaces/viewmailarchive.action?key=dubbo" class="" title="Browse mail in the Dubbo space">
<span>Mail</span></a> </li>
<li>
<a id="space-advanced-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/spaces/viewspacesummary.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/spaces/viewspacesummary.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/spaces/viewspacesummary.action?key=dubbo" class="" title="Browse additional space functions in the Dubbo space">
<span>Advanced</span></a> </li>
<li>
<a href="javascript:if(confirm(%27http://10.20.160.198/wiki/spaces/usage/report.action?key=dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/spaces/usage/report.action?key=dubbo%27" tppabs="http://10.20.160.198/wiki/spaces/usage/report.action?key=dubbo" class="" title="">
<span>Activity</span></a> </li>
</ul>
<ul id="browse-menu-link-global" class="section-global">
<li>
<a id="whats-new-menu-link" href="javascript:if(confirm(%27http://docs.atlassian.com/confluence/docs-35/whatsnew/iframe \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://docs.atlassian.com/confluence/docs-35/whatsnew/iframe%27" tppabs="http://docs.atlassian.com/confluence/docs-35/whatsnew/iframe" class="" title="">
<span>What’s New</span></a> </li>
<li>
<a id="people-directory-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/peopledirectory.action \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/peopledirectory.action%27" tppabs="http://10.20.160.198/wiki/peopledirectory.action" class="" title="Browse the Confluence people directory">
<span>People Directory</span></a> </li>
<li>
<a id="space-directory-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/spacedirectory/view.action \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/spacedirectory/view.action%27" tppabs="http://10.20.160.198/wiki/spacedirectory/view.action" class="" title="Browse the Confluence space directory">
<span>Space Directory</span></a> </li>
<li>
<a id="keyboard-shortcuts-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki%27" tppabs="http://10.20.160.198/wiki" class="" title="View available keyboard shortcuts">
<span>Keyboard Shortcuts</span></a> </li>
<li>
<a id="gadget-directory-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki%27" tppabs="http://10.20.160.198/wiki" class="user-item administration-link" title="Browse gadgets provided by Confluence">
<span>Confluence Gadgets</span></a> </li>
</ul>
</div>
</li>
<li class="ajs-menu-item normal">
<a id="login-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/login.action?os_destination=%2Fdisplay%2Fdubbo%2FBad%2BSmell-zh%3FshowComments%3Dtrue%26showCommentArea%3Dtrue \n\nThis file was not retrieved by Teleport Ultra, because it is linked too far away from its Starting Address. If you increase the in-domain depth setting for the Starting Address, this file will be queued for retrieval. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/login.action?os_destination=%2Fdisplay%2Fdubbo%2FBad%2BSmell-zh%3FshowComments%3Dtrue%26showCommentArea%3Dtrue%27" tppabs="http://10.20.160.198/wiki/login.action?os_destination=%2Fdisplay%2Fdubbo%2FBad%2BSmell-zh%3FshowComments%3Dtrue%26showCommentArea%3Dtrue" class="user-item login-link" title="">
<span>Log In</span></a> </li>
</ul>
<ol id="breadcrumbs">
<li class="first" >
<span><a href="javascript:if(confirm(%27http://10.20.160.198/wiki/dashboard.action \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/dashboard.action%27" tppabs="http://10.20.160.198/wiki/dashboard.action" title="Go to Dashboard">Dashboard</a></span>
</li>
<li>
<span><a href="javascript:if(confirm(%27http://10.20.160.198/wiki/display/dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/display/dubbo%27" tppabs="http://10.20.160.198/wiki/display/dubbo">Dubbo</a></span>
</li>
<li id="ellipsis" title="Show all breadcrumbs"><span><strong>…</strong></span></li>
<li class="hidden-crumb" >
<span><a href="Home-zh.htm" tppabs="http://10.20.160.198/wiki/display/dubbo/Home-zh">Home-zh</a></span>
</li>
<li>
<span><a href="Developer+Guide-zh.htm" tppabs="http://10.20.160.198/wiki/display/dubbo/Developer+Guide-zh">Developer Guide-zh</a></span>
</li>
<li>
<span>Bad Smell-zh</span>
</li>
</ol>
</div><!-- \#header -->
<div id="main" >
<div id="navigation" class="content-navigation view" style="display: none">
<fieldset class="hidden parameters">
<input type="hidden" id="pageId" value="6950807">
</fieldset>
<ul class="ajs-menu-bar">
<li class="normal ajs-menu-item">
<a id="add-menu-link" class="add trigger ajs-menu-title" href="#"><span><span>Add</span></span></a> <div class="assistive ajs-drop-down">
<ul id="add-menu-link-page" class="section-page first">
<li>
<a id="add-comment-menu-link" href="Bad+Smell-zh-showComments=true&showCommentArea=true.htm#addcomment" tppabs="http://10.20.160.198/wiki/display/dubbo/Bad+Smell-zh?showComments=true&showCommentArea=true#addcomment" class="add-comment" title="Add a Comment">
<span>Comment</span></a> </li>
</ul>
</div>
</li>
<li class="normal ajs-menu-item">
<a id="action-menu-link" class="action trigger ajs-menu-title" href="#"><span><span>Tools</span></span></a> <div class="assistive ajs-drop-down">
<ul id="action-menu-link-primary" class="section-primary first">
<li>
<a id="view-attachments-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewpageattachments.action?pageId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewpageattachments.action?pageId=6950807%27" tppabs="http://10.20.160.198/wiki/pages/viewpageattachments.action?pageId=6950807" class="action-view-attachments" accessKey="a" title="View Attachments">
<span><u>A</u>ttachments (0)</span></a> </li>
<li>
<a id="action-view-history-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewpreviousversions.action?pageId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewpreviousversions.action?pageId=6950807%27" tppabs="http://10.20.160.198/wiki/pages/viewpreviousversions.action?pageId=6950807" class="action-view-history" title="">
<span>Page History</span></a> </li>
<li>
<a id="action-page-permissions-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807%27" tppabs="http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807" class="action-page-permissions" title="Edit restrictions">
<span>Restrictions</span></a> </li>
</ul>
<ul id="action-menu-link-secondary" class="section-secondary">
<li>
<a id="view-page-info-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807%27" tppabs="http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807" class="action-view-info" title="">
<span>Info</span></a> </li>
<li>
<a id="link-to-page-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807%27" tppabs="http://10.20.160.198/wiki/pages/viewinfo.action?pageId=6950807" class="" title="Link to this Page">
<span>Link to this Page…</span></a> </li>
<li>
<a id="view-in-hierarchy-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/listpages-dirview.action?key=dubbo&openId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/listpages-dirview.action?key=dubbo&openId=6950807#selectedPageInHierarchy%27" tppabs="http://10.20.160.198/wiki/pages/listpages-dirview.action?key=dubbo&openId=6950807#selectedPageInHierarchy" class="" title="">
<span>View in Hierarchy</span></a> </li>
<li>
<a id="action-view-source-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/viewpagesrc.action?pageId=6950807 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/viewpagesrc.action?pageId=6950807%27" tppabs="http://10.20.160.198/wiki/pages/viewpagesrc.action?pageId=6950807" class="action-view-source popup-link" title="">
<span>View Wiki Markup</span></a> </li>
</ul>
</div>
</li>
</ul>
</div>
<h1 id="title-heading" class="pagetitle" style="display: none">
<a href="javascript:if(confirm(%27http://10.20.160.198/wiki/display/dubbo \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/display/dubbo%27" tppabs="http://10.20.160.198/wiki/display/dubbo"><img class="logo space custom" src="dubbo-version=5&modificationDate=1320723683000.jpg" tppabs="http://10.20.160.198/wiki/download/attachments/6324241/dubbo?version=5&modificationDate=1320723683000" alt=""></a>
</h1>
<div id="content" class="page view">
<div id="link-to-page-fields" class="hidden parameters">
<input type="hidden" id="linkToThisPageHeading" value="Link to this Page">
<input type="hidden" id="linkToThisPageLink" value="Link">
<input type="hidden" id="linkToThisPageTinyLink" value="Tiny Link">
<input type="hidden" id="linkToThisPageWikiMarkup" value="Wiki Markup">
<input type="hidden" id="linkToThisPageClose" value="Close">
</div>
<fieldset class="hidden parameters">
<input type="hidden" title="movePageDialogViewPageTitle" value="Move Page – ‘Bad Smell-zh’">
<input type="hidden" title="movePageDialogEditPageTitle" value="Set Page Location">
<input type="hidden" title="movePageDialogMoveButton" value="Move">
<input type="hidden" title="movePageDialogCancelButton" value="Cancel">
<input type="hidden" title="movePageDialogBrowsePanelTip" value="Click to select the new parent page for this page and its children.">
<input type="hidden" title="movePageDialogSearchPanel" value="Search">
<input type="hidden" title="movePageDialogHistoryPanel" value="Recently Viewed">
<input type="hidden" title="movePageDialogHistoryNoResults" value="There were no recently viewed pages found.">
<input type="hidden" title="movePageDialogLocationPanel" value="Known Location">
<input type="hidden" title="movePageDialogLocationNotFound" value="The specified page was not found.">
<input type="hidden" title="movePageDialogBrowsePanel" value="Browse">
<input type="hidden" title="movePageDialogPanelLoadErrorMsg" value="Error reading the panel content from the server.">
<input type="hidden" title="movePageDialogPanelLoadErrorTip" value="You could try reloading the page and launching the dialog again.">
<input type="hidden" title="movePageDialogPanelLoadErrorStatus" value="HTTP Status">
<input type="hidden" title="movePageDialogNoSelectionErrorMsg" value="You must make a selection in the tree before you can move the page.">
<input type="hidden" title="movePageDialogSearchError" value="Failed to retrieve search results from the server.">
<input type="hidden" title="movePageDialogSearchNoResults" value="There were no pages found containing <b>{0}</b>.">
<input type="hidden" title="movePageDialogSearchResultCount" value="Showing <b>{0}</b>-<b>{1}</b> of <b>{2}</b> pages containing <b>{3}</b>.">
<input type="hidden" title="movePageDialogMoveFailed" value="Move failed. There was a problem contacting the server.">
<input type="hidden" title="movePageDialogCannotChangeSpace" value="You cannot move this page to another space because you do not have permission to remove it from this space.">
<input type="hidden" title="pageTitle" value="Bad Smell-zh"/>
<input type="hidden" title="parentPageTitle" value="Developer Guide-zh"/>
<input type="hidden" title="fromPageTitle" value=""/>
<input type="hidden" title="spaceKey" value="dubbo"/>
<input type="hidden" title="spaceName" value="Dubbo"/>
<input type="hidden" title="movePageDialogInvalidLocation" value="You cannot move a page to be underneath itself or its children."/>
<input type="hidden" title="movePageDialogOrderingTitle" value="Page Ordering"/>
<input type="hidden" title="movePageDialogBackButton" value="Back"/>
<input type="hidden" title="movePageDialogMoveAndOrderButton" value="Reorder"/>
<input type="hidden" title="movePageDialogNextButton" value="Move"/>
</fieldset>
<script type="text/x-template" title="movePageDialog">
<div class="row information">
<div class="inner">
<div class="element">
Specify the new parent page for this page and its children by space and title.
</div>
</div>
</div>
<div class="form">
<fieldset>
<legend class="assistive"><span>Change the Parent Page to a Known Page</span></legend>
<div class="row">
<label for="new-space">New space:</label>
<div class="value new-space-value">
<input id="new-space-key" name="new-space-key" type="hidden" value="dubbo">
<span class="space-input">
<input id="new-space" name="new-space" value="Dubbo" disabled="disabled">
</span>
<span class="description warning">You cannot move this page to another space because you do not have permission to remove it from this space.</span>
<div class="new-space-dropdown aui-dd-parent autocomplete"></div>
</div>
</div>
<div class="row">
<label for="new-parent-page">New parent page:</label>
<div class="value new-parent-page-value">
<span class="page-input">
<input id="new-parent-page" name="new-parent-page" value="Developer Guide-zh">
</span>
<span class="description">Start typing a page title to see a list of suggestions.</span>
<div class="new-parent-page-dropdown aui-dd-parent autocomplete"></div>
</div>
</div>
</fieldset>
</div>
<div class="location-info">
<div class="row">
<label>Current location:</label>
<div class="value breadcrumbs-container">
<div class="breadcrumbs-line">
<ul id="current-parent-breadcrumbs" class="breadcrumbs">
</ul>
</div>
</div>
</div>
<div class="row">
<label>New location:</label>
<div class="value breadcrumbs-container">
<div class="breadcrumbs-line">
<ul id="new-parent-breadcrumbs" class="breadcrumbs">
</ul>
</div>
</div>
</div>
</div>
</script>
<script type="text/x-template" title="movePageErrors">
<div id="move-errors" class="hidden warning"></div>
</script>
<script type="text/x-template" title="movePageBreadcrumb">
<li><a class="{2}" title="{3}" tabindex="-1"><span>{0}</span></a></li>
</script>
<script type="text/x-template" title="movePageBreadcrumbLoading">
<li class="loading"><span>Loading breadcrumbs…</span></li>
</script>
<script type="text/x-template" title="movePageBreadcrumbError">
<li class="warning last"><span>Error retrieving breadcrumbs.</span></li>
</script>
<script type="text/x-template" title="movePageNoMatchingPages">
<ol><li><span class="warning">No matching pages found.</span></li></ol>
</script>
<script type="text/x-template" title="movePageNoMatchingSpaces">
<ol><li><span class="warning">No matching spaces found.</span></li></ol>
</script>
<script type="text/x-template" title="movePageSearchPanel">
<div class="row information">
<div class="inner">
<div class="element">
Search for and select the new parent page for this page and its children.
</div>
</div>
</div>
<div id="move-page-search-container" class="row">
<div class="search-form">
<fieldset>
<legend class="assistive"><span>Search for a New Parent Page</span></legend>
<label for="move-page-search-query" class="assistive">Search keywords</label>
<input class="search-query" id="move-page-search-query">
<label for="move-page-search-space" class="assistive">Search in space</label>
<select id="move-page-search-space" class="search-space" disabled="disabled">
<option value="dubbo" selected="selected">Dubbo</option>
</select>
<input type="button" value="Search">
<div class="description warning">You cannot move this page to another space because you do not have permission to remove it from this space.</div>
</fieldset>
</div>
<div class="search-results">
</div>
</div>
</script>
<script type="text/x-template" title="movePageSearchResultsLoading">
<div class="searching">Searching…</div>
</script>
<script type="text/x-template" title="movePageHistoryPanel">
<div class="row information">
<div class="inner">
<div class="element">
Select the new parent page for this page and its children from your history.
</div>
</div>
</div>
<div id="move-page-search-container" class="row">
<div class="search-results">
</div>
</div>
</script>
<script type="text/x-template" title="movePageHistoryLoading">
<div class="searching">Loading…</div>
</script>
<script type="text/x-template" title="movePageBrowsePanel">
<div class="row information">
<div class="inner">
<div class="element">
Click to select the new parent page for this page and its children.
</div>
</div>
</div>
<div class="tree"></div>
</script>
<script type="text/x-template" title="movePagePanelLoading">
<span>Loading…</span>
</script>
<script type="text/x-template" title="movePageBrowsePanelSpace">
<ul><li id='tree-root-node-item' class='root-node-list-item'><a class='root-node' href='#'>{0}</a></li></ul>
</script>
<script type="text/x-template" title="orderingPagePanel">
<div id="orderingPlaceHolder"></div>
</script>
<script type="text/x-template" title="reorderCheckbox">
<span id="reorderRequirement"><input id="reorderCheck" type="checkbox" name="reorderFlag" title="Choose the position of this page within the list of child pages."/><label for="reorderCheck" title="Choose the position of this page within the list of child pages.">Reorder</label></span>
</script>
<script type="text/x-template" title="move-help-link">
<div class="dialog-help-link">
<a href="http://docs.atlassian.com/confluence/docs-35/Moving+a+Page" target="_blank">Help</a>
</div>
</script>
<script type="text/x-template" title="searchResultsGrid">
<table>
<thead>
<tr class="header">
<th class="search-result-title">Page Title</th>
<th class="search-result-space">Space</th>
<th class="search-result-date">Updated</th>
</tr>
</thead>
</table>
</script>
<script type="text/x-template" title="searchResultsGridCount">
<p class="search-result-count">{0}</p>
</script>
<script type="text/x-template" title="searchResultsGridRow">
<tr class="search-result">
<th class="search-result-title"><a href="{1}" class="content-type-{2}"><span>{0}</span></a></th>
<td class="search-result-space"><a class="space" href="http://10.20.160.198/wiki/display/{4}/" title="{3}">{3}</a></td>
<td class="search-result-date"><span class="date" title="{6}">{5}</span></td>
</tr>
</script>
<!-- Start restrictions section -->
<script type="text/x-template" title="page-permissions-div">
<div id="page-permissions-div">
<div id="page-permissions-editor-form">
<div id="page-permissions-error-div" class="hidden">
<a href="#" id="permissions-error-div-close">Ok</a>
<div></div>
</div>
<div id="page-permissions-type-radios" class="page-permissions-label-rows">
<div>
<input id="restrictViewRadio" type="radio" checked="checked" name="pagePermissionTypeRadio" value="view"/>
<label for="restrictViewRadio">Restrict viewing of this page</label>
<input id="restrictEditRadio" type="radio" name="pagePermissionTypeRadio" value="edit"/>
<label for="restrictEditRadio">Restrict editing of this page</label>
</div>
</div>
<div id="page-permissions-input" class="page-permissions-label-rows">
<div class="page-permissions-label">To:</div>
<div id="page-permissions-chooser-box">
<span id="page-permissions-choose-user" class="ajs-button">
<a href="#" id='userpicker-popup-link-image' onClick="var picker = window.open('http://10.20.160.198/wiki/spaces/openuserpicker.action?key=dubbo&startIndex=0&onPopupSubmit=AJS.PagePermissions.addUserPermissions', 'EntitiesPicker', 'status=yes,resizable=yes,top=100,left=200,width=700,height=680,scrollbars=yes'); picker.focus(); return false;"><img src="user_16.gif"/*tpa=http://10.20.160.198/wiki/s/en/2166/34/_/images/icons/user_16.gif*/ height=16 width=16 border=0 align="absmiddle" title="Choose users" /></a>
<a href="#" id='userpicker-popup-link-text' onClick="var picker = window.open('http://10.20.160.198/wiki/spaces/openuserpicker.action?key=dubbo&startIndex=0&onPopupSubmit=AJS.PagePermissions.addUserPermissions', 'EntitiesPicker', 'status=yes,resizable=yes,top=100,left=200,width=700,height=680,scrollbars=yes'); picker.focus(); return false;">Person...</a>
</span>
<span id="page-permissions-choose-group" class="ajs-button">
<a href="#" id='grouppicker-popup-link-image' onClick="var picker = window.open('http://10.20.160.198/wiki/spaces/opengrouppicker.action?key=dubbo&startIndex=0&actionName=dosearchgroups.action&onPopupSubmit=AJS.PagePermissions.addGroupPermissions', 'EntitiesPicker', 'status=yes,resizable=yes,top=100,left=200,width=580,height=550,scrollbars=yes'); picker.focus(); return false;"><img src="group_16.gif"/*tpa=http://10.20.160.198/wiki/s/en/2166/34/_/images/icons/group_16.gif*/ height=16 width=16 border=0 align="absmiddle" title="Choose groups" /></a>
<a href="#" id='grouppicker-popup-link-text' onClick="var picker = window.open('http://10.20.160.198/wiki/spaces/opengrouppicker.action?key=dubbo&startIndex=0&actionName=dosearchgroups.action&onPopupSubmit=AJS.PagePermissions.addGroupPermissions', 'EntitiesPicker', 'status=yes,resizable=yes,top=100,left=200,width=580,height=550,scrollbars=yes'); picker.focus(); return false;">Group...</a>
</span>
</div>
<div id="page-permissions-input-box">
<span>
<input type="text" id="page-permissions-names-input" class="input-placeholder" value="Enter user or group name" name="permissionNames" size="30" autocomplete="off"/>
</span>
<input
type="hidden"
id="page-permissions-names-hidden" /> <img height="16px" width="1px" src="spacer.gif"/*tpa=http://10.20.160.198/wiki/s/en/2166/34/_/images/border/spacer.gif*//>
<input type="button" id="add-typed-names" value="Restrict">
</div>
</div>
</div>
<div id="page-permissions-tables">
<div id="page-permissions-table-div">
<table id="page-permissions-table" class="page-permissions-table">
<tr id="page-permissions-no-views" class="marker-row">
<td colspan="3" class="page-permissions-marker-cell"><span>No view restrictions are defined for this page</span></td>
</tr>
<tr id="page-permissions-no-edits" class="marker-row">
<td colspan="3" class="page-permissions-marker-cell"><span>No edit restrictions are defined for this page</span></td>
</tr>
</table>
</div>
<div id="page-inherited-permissions-table-div" class="hidden">
<span id="page-inherited-permissions-table-desc">
<a class="icon twisty-closed">Show/Hide</a>
<a id="toggle-inherited-permissions" title="Click to see inherited restrictions">This page has restricted parent pages. It can only be seen by users who can see those parent pages.</a>
</span>
<div id="page-inherited-permissions-tables" class="hidden page-inheritance-togglable"></div>
</div>
</div>
</div>
</script>
<script type="text/x-template" title="permissions-row-template">
<tr class="permission-row">
<td class="page-permissions-marker-cell" width="20%">
<span>Viewing restricted to:</span>
</td>
<td class="permission-entity" nowrap="true" width="40%">
<span class="entity-container">
<img class="permission-entity-picture"/>
<span class="permission-entity-display-name"></span>
<span class="permission-entity-name-wrap"> (<span class="permission-entity-name"></span>)</span>
</span>
</td>
<td class="permission-detail-column">
<div class="permission-remove-div">
<a href="#" class="remove-permission-link">Remove restriction</a>
</div>
</td>
</tr>
</script>
<script type="text/x-template" title="permissions-username-no-suggestion-template">
<ol>
<li><a href="#" class="message"><span>No matches</span></a></li>
</ol>
</script>
<script type="text/x-template" title="page-inherited-permissions-table-div-template">
<div class="page-inherited-permissions-owner-div">
<div class="page-inherited-permissions-table-desc">Viewing restrictions apply to “<a></a>”. In order to see “<span></span>”, a user must be in the following list of users and groups:</div>
<table class="page-permissions-table"></table>
</div>
</script>
<script type="text/x-template" title="page-restrictions-help-link">
<div class="dialog-help-link">
<a href="http://docs.atlassian.com/confluence/docs-35/Page+Restrictions" target="_blank">Help</a>
</div>
</script>
<!-- End restrictions section -->
<fieldset class="hidden parameters">
<input type="hidden" title="spaceKeyEncoded" value="dubbo">
<input type="hidden" title="spaceKeyDecoded" value="dubbo">
</fieldset>
<a href="#page-metadata-end" class="assistive">Skip to end of metadata</a>
<div id="page-metadata-start" class="assistive"></div>
<div class="page-metadata">
<ul>
<li class="page-metadata-item noprint">
<a id="content-metadata-page-restrictions" href="#" class="page-metadata-icon page-restrictions hidden" title="Page restrictions apply. Click the lock icon to view or edit the restriction.">
<span>Page restrictions apply</span></a> </li>
<li class="page-metadata-modification-info" style="display: none">
Added by <a href="javascript:if(confirm(%27http://10.20.160.198/wiki/display/~william.liangf \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/display/~william.liangf%27" tppabs="http://10.20.160.198/wiki/display/~william.liangf"
class="url fn confluence-userlink" data-username="william.liangf"
>梁 飞</a>, last edited by <a href="javascript:if(confirm(%27http://10.20.160.198/wiki/display/~william.liangf \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/display/~william.liangf%27" tppabs="http://10.20.160.198/wiki/display/~william.liangf"
class="url fn confluence-userlink" data-username="william.liangf"
>梁 飞</a> on 五月 23, 2012
<span class="noprint"> (<a id="view-change-link" href="javascript:if(confirm(%27http://10.20.160.198/wiki/pages/diffpages.action?pageId=6950807&originalId=7670271 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://10.20.160.198/wiki/pages/diffpages.action?pageId=6950807&originalId=7670271%27" tppabs="http://10.20.160.198/wiki/pages/diffpages.action?pageId=6950807&originalId=7670271">view change</a>)</span>
</li>
</ul>
<div id="version-comment" class="noteMacro" style="display: none;">
<strong>Comment:</strong>
<br />
</div>
</div>
<a href="#page-metadata-start" class="assistive">Go to start of metadata</a>
<div id="page-metadata-end" class="assistive"></div>
<fieldset class="hidden parameters">
<input type="hidden" title="browsePageTreeMode" value="view">
<input type="hidden" title="parentPageId" value="6948815">
</fieldset>
<div class="wiki-content">
<!-- wiki content -->
<h2><a name="BadSmell-zh-%E5%9D%8F%E5%91%B3%E9%81%93"></a>坏味道</h2>
<p>(<a href="Bad+Smell-zh.htm" tppabs="http://10.20.160.198/wiki/display/dubbo/Bad+Smell-zh" title="Bad Smell-zh">+</a>) (<a href="#BadSmell-zh-%E5%9D%8F%E5%91%B3%E9%81%93">#</a>)</p>
<div class='panelMacro'><table class='noteMacro'><colgroup><col width='24'><col></colgroup><tr><td valign='top'><img src="warning-3.gif" tppabs="http://10.20.160.198/wiki/images/icons/emoticons/warning.gif" width="16" height="16" align="absmiddle" alt="" border="0"></td><td>这里记录的是Dubbo设计或实现不优雅的地方。</td></tr></table></div>
<h3><a name="BadSmell-zh-URL%E8%BD%AC%E6%8D%A2"></a>URL转换</h3>
<h4><a name="BadSmell-zh-1.%E7%82%B9%E5%AF%B9%E7%82%B9%E6%9A%B4%E9%9C%B2%E5%92%8C%E5%BC%95%E7%94%A8%E6%9C%8D%E5%8A%A1"></a>1. 点对点暴露和引用服务</h4>
<p>1.1. 直接暴露服务：<br/>
EXPORT(dubbo://provider-address/com.xxx.XxxService?version=1.0.0")</p>
<p>1.2. 点对点直连服务：<br/>
REFER(dubbo://provider-address/com.xxx.XxxService?version=1.0.0)</p>
<h4><a name="BadSmell-zh-2.%E9%80%9A%E8%BF%87%E6%B3%A8%E5%86%8C%E4%B8%AD%E5%BF%83%E6%9A%B4%E9%9C%B2%E6%9C%8D%E5%8A%A1"></a>2. 通过注册中心暴露服务</h4>
<p>2.1. 向注册中心暴露服务：<br/>
EXPORT(registry://registry-address/com.alibaba.dubbo.registry.RegistrySerevice?registry=dubbo&export=ENCODE(dubbo://provider-address/com.xxx.XxxService?version=1.0.0))</p>
<p>2.2. 获取注册中心：url.setProtocol(url.getParameter("registry", "dubbo"))<br/>
GETREGISTRY(dubbo://registry-address/com.alibaba.dubbo.registry.RegistrySerevice)</p>
<p>2.3. 注册服务地址：url.getParameterAndDecoded("export"))<br/>
REGISTER(dubbo://provider-address/com.xxx.XxxService?version=1.0.0)</p>
<h4><a name="BadSmell-zh-3.%E9%80%9A%E8%BF%87%E6%B3%A8%E5%86%8C%E4%B8%AD%E5%BF%83%E5%BC%95%E7%94%A8%E6%9C%8D%E5%8A%A1"></a>3. 通过注册中心引用服务</h4>
<p>3.1. 从注册中心订阅服务：<br/>
REFER(registry://registry-address/com.alibaba.dubbo.registry.RegistrySerevice?registry=dubbo&refer=ENCODE(version=1.0.0))</p>
<p>3.2. 获取注册中心：url.setProtocol(url.getParameter("registry", "dubbo"))<br/>
GETREGISTRY(dubbo://registry-address/com.alibaba.dubbo.registry.RegistrySerevice)</p>
<p>3.3. 订阅服务地址：url.addParameters(url.getParameterAndDecoded("refer"))<br/>
SUBSCRIBE(dubbo://registry-address/com.xxx.XxxService?version=1.0.0)</p>
<p>3.4. 通知服务地址：url.addParameters(url.getParameterAndDecoded("refer"))<br/>
NOTIFY(dubbo://provider-address/com.xxx.XxxService?version=1.0.0)</p>
<h4><a name="BadSmell-zh-4.%E6%B3%A8%E5%86%8C%E4%B8%AD%E5%BF%83%E6%8E%A8%E9%80%81%E8%B7%AF%E7%94%B1%E8%A7%84%E5%88%99"></a>4. 注册中心推送路由规则</h4>
<p>4.1. 注册中心路由规则推送：<br/>
NOTIFY(route://registry-address/com.xxx.XxxService?router=script&type=js&rule=ENCODE(function{...}))</p>
<p>4.2. 获取路由器：url.setProtocol(url.getParameter("router", "script"))<br/>
GETROUTE(script://registry-address/com.xxx.XxxService?type=js&rule=ENCODE(function{...}))</p>
<h4><a name="BadSmell-zh-5.%E4%BB%8E%E6%96%87%E4%BB%B6%E5%8A%A0%E8%BD%BD%E8%B7%AF%E7%94%B1%E8%A7%84%E5%88%99"></a>5. 从文件加载路由规则</h4>
<p>5.1. 从文件加载路由规则：<br/>
GETROUTE(<a href="file://path/file.js?router=script" class="external-link" rel="nofollow">file://path/file.js?router=script</a>)</p>
<p>5.2. 获取路由器：url.setProtocol(url.getParameter("router", "script")).addParameter("type", SUFFIX(file)).addParameter("rule", READ(file))<br/>
GETROUTE(script://path/file.js?type=js&rule=ENCODE(function{...}))</p>
<h3><a name="BadSmell-zh-%E8%B0%83%E7%94%A8%E5%8F%82%E6%95%B0"></a>调用参数</h3>
<ul>
<li>path 服务路径</li>
<li>group 服务分组</li>
<li>version 服务版本</li>
<li>dubbo 使用的dubbo版本</li>
<li>token 验证令牌</li>
<li>timeout 调用超时</li>
</ul>
<h3><a name="BadSmell-zh-%E6%89%A9%E5%B1%95%E7%82%B9%E7%9A%84%E5%8A%A0%E8%BD%BD"></a>扩展点的加载</h3>
<h4><a name="BadSmell-zh-1.%E8%87%AA%E9%80%82%E5%BA%94%E6%89%A9%E5%B1%95%E7%82%B9"></a>1. 自适应扩展点</h4>
<p>ExtensionLoader加载扩展点时，会检查扩展点的属性（通过set方法判断），如该属性是扩展点类型，则会注入扩展点对象。因为注入时不能确定使用哪个扩展点（在使用时确定），所以注入的是一个自适应扩展（一个代理）。自适应扩展点调用时，选取一个真正的扩展点，并代理到其上完成调用。Dubbo是根据调用方法参数（上面有调用哪个扩展点的信息）来选取一个真正的扩展点。</p>
<p>在Dubbo给定所有的扩展点上调用都有URL参数（整个扩展点网的上下文信息）。自适应扩展即是从URL确定要调用哪个扩展点实现。URL哪个Key的Value用来确定使用哪个扩展点，这个信息通过的@Adaptive注解在方法上说明。</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<script type="syntaxhighlighter" class="theme: Confluence; brush: java; gutter: false"><![CDATA[@Extension
public interface Car {
@Adaptive({"http://10.20.160.198/wiki/display/dubbo/car.type", "http://10.20.160.198/wiki/display/dubbo/transport.type"})
public run(URL url, Type1 arg1, Type2 arg2);
}]]></script>
</div></div>
<p>由于自适应扩展点的上面的约定，ExtensionLoader会为扩展点自动生成自适应扩展点类(通过字节码)，并将其实例注入。</p>
<p>ExtensionLoader生成的自适应扩展点类如下：</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<script type="syntaxhighlighter" class="theme: Confluence; brush: java; gutter: false"><![CDATA[package <扩展点接口所在包>;
public class <扩展点接口名>$Adpative implements <扩展点接口> {
public <有@Adaptive注解的接口方法>(<方法参数>) {
if(是否有URL类型方法参数?) 使用该URL参数
else if(是否有方法类型上有URL属性) 使用该URL属性
# <else 在加载扩展点生成自适应扩展点类时抛异常，即加载扩展点失败！>
if(获取的URL == null) {
throw new IllegalArgumentException("url == null");
}
根据@Adaptive注解上声明的Key的顺序，从URL获致Value，作为实际扩展点名。
如URL没有Value，则使用缺省扩展点实现。如没有扩展点， throw new IllegalStateException("Fail to get extension");
在扩展点实现调用该方法，并返回结果。
}
public <有@Adaptive注解的接口方法>(<方法参数>) {
throw new UnsupportedOperationException("is not adaptive method!");
}
}]]></script>
</div></div>
<p>@Adaptive注解使用如下：</p>
<p>如果URL这些Key都没有Value，使用 用 缺省的扩展（在接口的Default中设定的值）。<br/>
比如，String[] {"key1", "key2"}，表示 </p>
<p>先在URL上找key1的Value作为要Adapt成的Extension名； <br/>
key1没有Value，则使用key2的Value作为要Adapt成的Extension名。 <br/>
key2没有Value，使用缺省的扩展。 <br/>
如果没有设定缺省扩展，则方法调用会抛出IllegalStateException。 <br/>
如果不设置则缺省使用Extension接口类名的点分隔小写字串。<br/>
即对于Extension接口com.alibaba.dubbo.xxx.YyyInvokerWrapper的缺省值为String[] {"yyy.invoker.wrapper"}</p>
<h3><a name="BadSmell-zh-Callback%E5%8A%9F%E8%83%BD"></a>Callback功能</h3>
<h4><a name="BadSmell-zh-1.%E5%8F%82%E6%95%B0%E5%9B%9E%E8%B0%83"></a>1. 参数回调</h4>
<p>1.1主要原理:在一个Consumer->provider的长连接上，自动在Consumer端暴露一个服务（实现方法参数上声明的接口A），provider端便可反向调用到consumer端的接口实例.<br/>
1.2实现细节：</p>
<ul>
<li>为了在传输时能够对回调接口实例进行转换，自动暴露与自动引用目前在DubboCodec中实现.此处需要考虑将此逻辑与codec逻辑分离.</li>
<li>在根据invocation信息获取exporter时，需要判断是否是回调，如果是回调，会从attachments中取得回调服务实例的id，在获取exporter，此处用于consumer端可以对同一个callback接口做不同的实现。</li>
</ul>
<h4><a name="BadSmell-zh-2.%E4%BA%8B%E4%BB%B6%E9%80%9A%E7%9F%A5"></a>2. 事件通知</h4>
<p>2.1主要原理：Consumer在invoke方法时，判断如果有配置onreturn/onerror...则将onreturn对应的参数值(实例方法)加入到异步调用的回调列表中.<br/>
2.2实现细节：参数的传递采用URL，但URL中没有支持string-object，所以将实例方法存储在staticMap中，此处实现需要进行改造，<a href="javascript:if(confirm(%27http://code.alibabatech.com/jira/browse/DUBBO-168 \n\nThis file was not retrieved by Teleport Ultra, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?%27))window.location=%27http://code.alibabatech.com/jira/browse/DUBBO-168%27" tppabs="http://code.alibabatech.com/jira/browse/DUBBO-168" class="external-link" rel="nofollow">http://code.alibabatech.com/jira/browse/DUBBO-168</a></p>
<h3><a name="BadSmell-zh-Lazy%E8%BF%9E%E6%8E%A5"></a>Lazy连接</h3>
<p>DubboProtocol特有功能，默认关闭<br/>
当客户端与服务端创建代理时，暂不建立tcp长连接，当有数据请求时在做连接初始化<br/>
此项功能自动关闭连接重试功能，开启发送重试功能（即发送数据时如果连接已断开，尝试重新建立连接）.</p>
<h3><a name="BadSmell-zh-%E5%85%B1%E4%BA%AB%E8%BF%9E%E6%8E%A5"></a>共享连接</h3>
<p>DubboProtocol特有功能，默认开启<br/>
JVM A暴露了多个服务，JVM B引用了A中的多个服务，共享连接是说A与B多个服务调用是通过同一个TCP长连接进行数据传输，已达到减少服务端连接数的目的.<br/>
实现细节：对于同一个地址由于使用了共享连接，那invoker的destroy就需要特别注意，一方面要满足对同一个地址refer的invoker全部destroy后，连接需要关闭，另一方面还需要注意如何避免部分invoker destroy时不能关闭连接。在实现中采用了引用计数的方案，但为了防范，在连接关闭时，重新建立了一个Lazy connection(称为幽灵连接),用于当出现异常场景时，避免影响业务逻辑的正常调用.</p>
<h3><a name="BadSmell-zh-sticky%E7%AD%96%E7%95%A5"></a>sticky 策略</h3>
<p>有多个服务提供者的情况下，配置了sticky后，在提供者可用的情况下，调用会继续发送到上一次的服务提供者. sticky策略默认开启了连接的lazy选项,用于避免开启无用的连接.</p>
<h3><a name="BadSmell-zh-%E6%9C%8D%E5%8A%A1%E6%8F%90%E4%BE%9B%E8%80%85%E9%80%89%E6%8B%A9%E9%80%BB%E8%BE%91"></a>服务提供者选择逻辑</h3>
<p>1.存在多个服务提供者的情况下，首先根据Loadbalance进行选择，如果选择的provider处于可用状态，则进行后续调用<br/>
2.如果第一步选择的服务提供者不可用，则从剩余服务提供者列表中继续选择，如果可用，进行后续调用<br/>
3.如果所有的服务提供者都不可用，重新遍历整个列表（优先从没有选过的列表中选择），判断是否有可用的服务提供者（选择过程中，不可用的服务提供者可能会恢复到可用状态），如果有，则进行后续调用<br/>
4.如果第三步没有选择出可用的服务提供者，会选第一步选出的invoker中的下一个（如果不是最后一个），避免碰撞.</p>
</div>
<!--
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/">
<rdf:Description
rdf:about="http://code.alibabatech.com/wiki/display/dubbo/Bad+Smell-zh"
dc:identifier="http://code.alibabatech.com/wiki/display/dubbo/Bad+Smell-zh"
dc:title="Bad Smell-zh"
trackback:ping="http://code.alibabatech.com/wiki/rpc/trackback/6950807"/>
</rdf:RDF>
-->