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1 package alice.jungle.persistent;
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2
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180
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3 import fj.data.List;
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4 import fj.data.TreeMap;
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5 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeListWriter;
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6 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Result;
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7 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
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8 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TransactionManager;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TreeContext;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference.Reservation;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultEither;
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16 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultError;
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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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179
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20 public class PersistentTransactionManager implements TransactionManager {
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21 private final AtomicReservableReference<TreeContext> repository;
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22 private final TreeContext tip;
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23 private final ChangeListWriter writer;
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24 private final String uuid;
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25 private final String treeName;
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26
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27 public PersistentTransactionManager(String _treeName, ChangeListWriter _writer,TreeContext _tip,
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28 AtomicReservableReference<TreeContext> _repository,String _uuid)
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29 {
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30 repository = _repository;
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31 tip = _tip;
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32 writer = _writer;
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33 uuid = _uuid;
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34 treeName = _treeName;
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35 }
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36
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37 @Override
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38 public Either<Error, TransactionManager> commit(TreeNode _newRoot,final TreeOperationLog _log,TreeMap<String, TreeMap<String, List<TreeNode>>> index) {
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39 ChangeSet cs = tip.getChangeSet();
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40 long currentRevision = cs.revision();
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41 long nextRevision = currentRevision + 1;
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42
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43 PersistentChangeList list = new PersistentChangeList(uuid, treeName, _log);
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44 TreeNode root = _newRoot;
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45 PersistentChangeSet newCs = new PersistentChangeSet(root, cs, list, uuid, treeName, nextRevision);
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46 DefaultTreeContext newContext = new DefaultTreeContext(_newRoot,newCs);
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47
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48 @SuppressWarnings("rawtypes")
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49 Reservation reservation = repository.makeReservation(tip, newContext);
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50 if(reservation == null) {
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51 return DefaultEither.newA((Error)new DefaultError());
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52 }
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53 Result r = writer.write(list);
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54 if(r != Result.SUCCESS) {
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55 return DefaultEither.newA((Error)new DefaultError());
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56 }
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57 reservation.confirm();
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58 TransactionManager txManager = new PersistentTransactionManager(treeName, writer, newContext, repository, uuid);
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59 return DefaultEither.newB(txManager);
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60 }
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61
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62 @Override
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63 public long getRevision()
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64 {
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65 ChangeSet cs = tip.getChangeSet();
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66 return cs.revision();
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67 }
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68
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69 @Override
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70 public String getUUID() {
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71 return uuid;
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72 }
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73
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75
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76 }
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