Mercurial > hg > Database > jungle-network

annotate src/jungle/app/bbs/JungleManager.java @ 66:29127ac788a6

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move some files
author one
date Tue, 20 Aug 2013 17:38:09 +0900
parents src/jungle/test/bbs/JungleManager.java@ebf42371454b
children 89e39301ccaa
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1 package jungle.app.bbs;
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2
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3 import java.io.IOException;
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4 import java.nio.ByteBuffer;
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5 import java.util.Iterator;
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6
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7 import alice.jungle.datasegment.store.operations.DefaultTreeOperationLogContainer;
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8 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.Jungle;
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTree;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTreeEditor;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.Command;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.DefaultTreeOperationLog;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
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16 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.NodeOperation;
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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19 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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20
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21 public class JungleManager {
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22 private static JungleManager jm = new JungleManager();
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23 private Jungle jungle;
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24
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25 private JungleManager() {
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26
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27 }
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28
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29 public static void setJungle(Jungle _j) {
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30 jm.jungle = _j;
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31 }
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32
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33 public static Jungle getJungle() {
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34 return jm.jungle;
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35 }
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36
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37 public static JungleTree createNewTree(String name) {
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38 return jm.jungle.createNewTree(name);
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39 }
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40
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41 public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor ,TreeOperationLog _log, int pos) {
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42 JungleTreeEditor editor = _editor;
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43 Either<Error, JungleTreeEditor> either = null;
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44 for (TreeOperation op : _log) {
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45 either = _edit(editor, op, pos);
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46 if(either.isA()) {
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47 return either;
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48 }
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49 editor = either.b();
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50 }
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51 return either;
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52 }
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53
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54 private static Either<Error, JungleTreeEditor> _edit(JungleTreeEditor editor,
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55 TreeOperation op, int pos) {
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56 DefaultNodePath path = new DefaultNodePath();
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57 NodeOperation nodeOp = op.getNodeOperation();
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58 Command c = nodeOp.getCommand();
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59 String key = "";
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60 switch (c) {
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61 case PUT_ATTRIBUTE:
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62 path = path.add(pos);
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63 key = nodeOp.getKey();
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64 ByteBuffer value = nodeOp.getValue();
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65 return editor.putAttribute(path, key, value);
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66 case DELETE_ATTRIBUTE:
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67 key = nodeOp.getKey();
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68 return editor.deleteAttribute(path, key);
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69 case APPEND_CHILD:
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70 return editor.addNewChildAt(path, pos);
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71 case DELETE_CHILD:
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72 return editor.deleteChildAt(path, 0);
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73 }
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74 return null;
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75 }
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76
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77 public static Either<Error, JungleTreeEditor> update(DefaultTreeOperationLogContainer container) {
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78 DefaultTreeOperationLog log = null;
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79 try {
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80 log = container.convert();
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81 } catch (IOException e) {
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82 e.printStackTrace();
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83 }
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84 String treeName = container.getTreeName();
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85 if (JungleManager.getJungle().getTreeByName(treeName) == null) {
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86 if(null == JungleManager.getJungle().createNewTree(treeName)){
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87 throw new IllegalStateException();
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88 }
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89 }
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90 JungleTree tree = JungleManager.getJungle().getTreeByName(treeName);
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91 JungleTreeEditor editor = tree.getTreeEditor();
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92 int pos = checkTimeStamp(tree.getRootNode(), container.getTimeStamp(), container.getPosition());
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93 Either<Error, JungleTreeEditor> either = JungleManager.edit(editor, log, pos);
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94 if(either.isA()) {
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95 throw new IllegalStateException();
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96 }
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97 editor = either.b();
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98 either = editor.success();
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99 if(either.isA()) {
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100 throw new IllegalStateException();
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101 }
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102 return either;
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103 }
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104
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106
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107 private static int checkTimeStamp(Node node, long newNodeTimeStamp, int containerPosition) {
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108 int count = 0;
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109 long childTimeStamp = 0;
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110 for(Iterator<Node> iter = node.getChildren().iterator();iter.hasNext();) {
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111 Node n = iter.next();
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112 if(n.getAttributes().get("timestamp") == null) {
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113 return containerPosition;
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114 }
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115 if(n.getAttributes().get("timestamp") != null) {
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116 childTimeStamp = n.getAttributes().get("timestamp").getLong();
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117 if (newNodeTimeStamp < childTimeStamp) {
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118 break;
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119 }
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120 }
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121 count++;
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122 }
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123 return count;
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124 }
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125 }