Mercurial > hg > Database > jungle-network

annotate src/main/java/alice/jungle/persistent/PersistentJungle.java @ 178:d6944d788121

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fit Junglecore
author tatsuki
date Thu, 04 Sep 2014 13:12:25 +0900
parents 6f104ab4eb81
children 5d0734fd859d
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1 package alice.jungle.persistent;
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2
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3 import java.util.Iterator;
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4 import java.util.concurrent.ConcurrentHashMap;
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5
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6 import fj.data.List;
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7 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.Jungle;
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8 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTree;
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.TreeEditor;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeNode;
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16
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17 public class PersistentJungle implements Jungle {
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18 private PersistentJournal journal;
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19 private ConcurrentHashMap<String,JungleTree> trees;
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20 final private String uuid;
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21 private TreeEditor editor;
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23 public PersistentJungle(PersistentJournal _journal,String _uuid,TreeEditor _editor)
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24 {
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25 journal = _journal;
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26 trees = new ConcurrentHashMap<String,JungleTree>();
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27 uuid = _uuid;
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28 editor = _editor;
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29 }
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31 @Override
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32 public JungleTree getTreeByName(String _name)
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33 {
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34 return trees.get(_name);
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35 }
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36
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37 @Override
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38 public JungleTree createNewTree(final String _name)
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39 {
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40 ChangeList list = new ChangeList(){
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41 @Override
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42 public Iterator<TreeOperation> iterator() {
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43 List<TreeOperation> nil = List.nil();
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44 return nil.iterator();
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45 }
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46 @Override
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47 public String uuid() {
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48 return uuid;
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49 }
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50 @Override
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51 public String getTreeName() {
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52 return _name;
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53 }
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54 };
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55 TreeNode root = new DefaultTreeNode();
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56 ChangeSet set = new PersistentChangeSet(root,null,list,uuid,_name,0);
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57 DefaultTreeContext tc = new DefaultTreeContext(root,set);
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58 JungleTree newTree = new PersistentJungleTree(_name, tc,uuid, journal.getWriter(),editor);
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59 if(trees.putIfAbsent(_name,newTree) != null){
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60 return null;
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61 }
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62 return newTree;
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63 }
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65 }