Mercurial > hg > Database > jungle-network

annotate src/main/java/app/bbs/JungleManager.java @ 115:3f9c6ab43461

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Adde PersistentJournalTest.java
author one
date Fri, 20 Dec 2013 06:51:35 +0900
parents 7d9b7fcb4d9a
children 895ab2907db3
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1 package app.bbs;
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2
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3 import java.nio.ByteBuffer;
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4 import java.util.Iterator;
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5
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6 import alice.jungle.operations.NetworkTreeOperationLog;
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7 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.DefaultJungle;
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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.NodePath;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultTreeEditor;
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16 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.NodeOperation;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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19 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.traverser.DefaultTraverser;
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20 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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21 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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22
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23 public class JungleManager {
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24 private static JungleManager instance = new JungleManager();
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25 private Jungle jungle;
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26 private static int NOT_CHANGE_POSITION = 0;
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27
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28 private JungleManager() {
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29 jungle = new DefaultJungle(null,"hogehoge",new DefaultTreeEditor(new DefaultTraverser()));
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30 }
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32 public static JungleManager getInstantce() {
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33 return instance;
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34 }
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35
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36 public static void setJungle(Jungle _j) {
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37 instance.jungle = _j;
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38 }
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40 public static Jungle getJungle() {
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41 return instance.jungle;
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42 }
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44 public static JungleTree createNewTree(String name) {
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45 return instance.jungle.createNewTree(name);
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46 }
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47
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48 public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor ,TreeOperationLog _log, int pos) {
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49 JungleTreeEditor editor = _editor;
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50 Either<Error, JungleTreeEditor> either = null;
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51 for (TreeOperation op : _log) {
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52 either = _edit(editor, op, pos);
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53 if(either.isA()) {
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54 return either;
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55 }
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56 editor = either.b();
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57 }
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58 return either;
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59 }
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60
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61 private static Either<Error, JungleTreeEditor> _edit(JungleTreeEditor editor,
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62 TreeOperation op, int _pos) {
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63 NodePath path = new DefaultNodePath();
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64 NodeOperation nodeOp = op.getNodeOperation();
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65 int pos = _pos;
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66 if (_pos == NOT_CHANGE_POSITION ) {
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67 pos = nodeOp.getPosition();
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68 }
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69 Command c = nodeOp.getCommand();
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70 String key = "";
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71 switch (c) {
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72 case PUT_ATTRIBUTE:
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73 path = op.getNodePath();
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74 key = nodeOp.getKey();
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75 ByteBuffer value = nodeOp.getValue();
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76 return editor.putAttribute(path, key, value);
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77 case DELETE_ATTRIBUTE:
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78 key = nodeOp.getKey();
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79 return editor.deleteAttribute(path, key);
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80 case APPEND_CHILD:
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81 return editor.addNewChildAt(path, pos);
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82 case DELETE_CHILD:
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83 return editor.deleteChildAt(path, 0);
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84 }
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85 return null;
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86 }
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87
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88 public static Either<Error, JungleTreeEditor> update(NetworkTreeOperationLog netLog) {
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89 String treeName = netLog.getTreeName();
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90 Jungle jungle = JungleManager.getJungle();
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91 if (jungle.getTreeByName(treeName) == null) {
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92 if(null == jungle.createNewTree(treeName)){
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93 throw new IllegalStateException();
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94 }
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95 }
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96 JungleTree tree = jungle.getTreeByName(treeName);
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97 JungleTreeEditor editor = tree.getLocalTreeEditor();
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99 // int pos = calculatePosition(tree.getRootNode(), netLog.getTimeStamp());
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100 int pos = 0;
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101 Either<Error, JungleTreeEditor> either = JungleManager.edit(editor, netLog, pos);
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102 if(either.isA()) {
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103 throw new IllegalStateException();
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104 }
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105 editor = either.b();
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106 either = editor.success();
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107 if(either.isA()) {
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108 throw new IllegalStateException();
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109 }
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110 return either;
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111 }
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112
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113 private static int calculatePosition(Node node, long newNodeTimeStamp) {
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114 int count = 0;
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115 long childTimeStamp = 0;
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116 for(Iterator<Node> iter = node.getChildren().iterator();iter.hasNext();) {
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117 Node n = iter.next();
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118 if(n.getAttributes().get("timestamp") == null) {
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119 return NOT_CHANGE_POSITION;
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120 }
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121 if(n.getAttributes().get("timestamp") != null) {
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122 childTimeStamp = n.getAttributes().get("timestamp").getLong();
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123 if (newNodeTimeStamp < childTimeStamp) {
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124 break;
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125 }
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126 }
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127 count++;
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128 }
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129 return count;
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130 }
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131 }