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annotate src/main/java/app/bbs/BulletinBoardJungleManager.java @ 133:00fcb468de27

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Rename to BulletinBoardJungleManager
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Sat, 11 Jan 2014 09:30:57 +0900
parents src/main/java/app/bbs/BullentInBoardJungleManager.java@0b3375dee51d
children 2e8034524259
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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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5 import alice.jungle.operations.NetworkTreeOperationLog;
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6 import alice.jungle.transaction.JungleUpdater;
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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.impl.DefaultTreeEditor;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.traverser.DefaultTraverser;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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17 public class BulletinBoardJungleManager {
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18 private static BulletinBoardJungleManager instance = new BulletinBoardJungleManager();
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19 private Jungle jungle;
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20
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21 private BulletinBoardJungleManager() {
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22 jungle = new DefaultJungle(null,"default",new DefaultTreeEditor(new DefaultTraverser()));
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23 }
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25 public static BulletinBoardJungleManager getInstantce() {
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26 return instance;
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27 }
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29 public static void setJungle(Jungle _j) {
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30 instance.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 instance.jungle;
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35 }
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37 public static JungleTree createNewTree(String name) {
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38 return instance.jungle.createNewTree(name);
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39 }
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41 public static Either<Error, JungleTreeEditor> update(NetworkTreeOperationLog netLog) {
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42 String treeName = netLog.getTreeName();
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43 Jungle jungle = BulletinBoardJungleManager.getJungle();
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44 if (jungle.getTreeByName(treeName) == null) {
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45 if(null == jungle.createNewTree(treeName)){
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46 throw new IllegalStateException();
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47 }
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48 }
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49 Either<Error, JungleTreeEditor> either = null;
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50 do {
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51 JungleTree tree = jungle.getTreeByName(treeName);
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52 JungleTreeEditor editor = tree.getLocalTreeEditor();
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54 /*
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55 * Merge.
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56 */
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57 int pos = calculatePosition(tree.getRootNode(), netLog.getTimeStamp());
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58 either = JungleUpdater.edit(editor, netLog, pos);
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59 if(either.isA()) {
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60 throw new IllegalStateException();
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61 }
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63 editor = either.b();
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64 either = editor.success();
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65 }while(either.isA());
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66 return either;
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67 }
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69 private static int calculatePosition(Node node, long newNodeTimeStamp) {
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70 int count = 0;
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71 long childTimeStamp = 0;
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72 for(Node n : node.getChildren()) {
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73 ByteBuffer timestamp = n.getAttributes().get("timestamp");
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74 if(timestamp == null) {
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75 return count;
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76 }
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77 childTimeStamp = timestamp.getLong();
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78 if (newNodeTimeStamp < childTimeStamp) {
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79 break;
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80 }
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81 count++;
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82 }
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83 return count;
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84 }
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85 }