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annotate src/main/java/app/bbs/BulletinBoardJungleManager.java @ 149:06cddf529325

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Modified lates renew time
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 28 Jan 2014 11:30:47 +0900
parents 7d248be1d3e4
children 6f104ab4eb81
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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.concurrent.atomic.AtomicInteger;
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5
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7 import alice.jungle.operations.NetworkTreeOperationLog;
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8 import alice.jungle.transaction.JungleUpdater;
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.DefaultJungle;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.Jungle;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTree;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTreeEditor;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
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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.traverser.DefaultTraverser;
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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19
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20 public class BulletinBoardJungleManager {
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21 private static BulletinBoardJungleManager instance = new BulletinBoardJungleManager();
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22 private Jungle jungle;
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23 private static AtomicInteger requestCounter = new AtomicInteger(0);
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25 private BulletinBoardJungleManager() {
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26 jungle = new DefaultJungle(null,"default",new DefaultTreeEditor(new DefaultTraverser()));
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27 }
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29 public static int requestGetAndIncrement() {
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30 return requestCounter.getAndIncrement();
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31 }
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33 public static int requestIncrementAndGet() {
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34 return requestCounter.incrementAndGet();
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35 }
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37 public static BulletinBoardJungleManager getInstantce() {
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38 return instance;
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39 }
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41 public static void setJungle(Jungle _j) {
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42 instance.jungle = _j;
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43 }
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44 public static AtomicInteger getRequestCounter() {
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45 return requestCounter;
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46 }
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47
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48 public static Jungle getJungle() {
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49 return instance.jungle;
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50 }
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51
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52 public static JungleTree createNewTree(String name) {
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53 return instance.jungle.createNewTree(name);
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54 }
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55
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56 public static Either<Error, JungleTreeEditor> update(NetworkTreeOperationLog netLog) {
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57 String treeName = netLog.getTreeName();
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58 Jungle jungle = BulletinBoardJungleManager.getJungle();
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59 if (jungle.getTreeByName(treeName) == null) {
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60 if(null == jungle.createNewTree(treeName)){
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61 throw new IllegalStateException();
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62 }
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63 }
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64 Either<Error, JungleTreeEditor> either = null;
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65 JungleTree tree = jungle.getTreeByName(treeName);
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67 long timestamp = System.currentTimeMillis();
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68 ByteBuffer tBuffer = ByteBuffer.allocate(16);
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69 DefaultNodePath root = new DefaultNodePath();
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70 tBuffer.putLong(timestamp);
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71 do {
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72 JungleTreeEditor editor = tree.getLocalTreeEditor();
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73 /*
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74 * Merge.
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75 */
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76 int pos = calculatePosition(tree.getRootNode(), netLog.getTimeStamp());
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77 either = JungleUpdater.edit(editor, netLog, pos);
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78 if(either.isA()) {
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79 throw new IllegalStateException();
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80 }
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81 editor = either.b();
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82 either = editor.putAttribute(root, "renewtime", tBuffer);
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83 if(either.isA()) {
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84 throw new IllegalStateException();
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85 }
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86 editor = either.b();
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87 either = editor.success();
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88 }while(either.isA());
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89 requestIncrementAndGet();
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90 return either;
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91 }
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92
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93 private static int calculatePosition(Node node, long newNodeTimeStamp) {
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94 int count = 0;
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95 long childTimeStamp = 0;
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96 for(Node n : node.getChildren()) {
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97 ByteBuffer timestamp = n.getAttributes().get("timestamp");
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98 if(timestamp == null) {
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99 return count;
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100 }
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101 childTimeStamp = timestamp.getLong(0);
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102 if (newNodeTimeStamp < childTimeStamp) {
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103 break;
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104 }
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105 count++;
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106 }
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107 return count;
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108 }
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109 }