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1 package alice.jungle.transaction;
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30
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2
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3 import java.io.IOException;
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4 import java.util.Iterator;
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5
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35
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6 import alice.jungle.codesegment.LogUpdateCodeSegment;
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7 import alice.jungle.datasegment.store.operations.DefaultTreeOperationLogContainer;
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8
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeListWriter;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Result;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
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16 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference.Reservation;
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19 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultChangeSet;
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20 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext;
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21 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TransactionManager;
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22 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TreeContext;
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23 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultEither;
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24 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultError;
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25 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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26 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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27
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28 public class NetworkTransactionManager<T extends TreeNode<T>> implements TransactionManager<T>
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29 {
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30
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31 private final AtomicReservableReference<TreeContext<T>> repository;
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32 private final TreeContext<T> tip;
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33 private final ChangeListWriter writer;
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34 private final String uuid;
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35 private final String treeName;
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36
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37 public NetworkTransactionManager(String _treeName, ChangeListWriter _writer,TreeContext<T> _tip,
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38 AtomicReservableReference<TreeContext<T>> _repository,String _uuid)
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39 {
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40 repository = _repository;
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41 tip = _tip;
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42 writer = _writer;
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43 uuid = _uuid;
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44 treeName = _treeName;
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45 }
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46
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47 @Override
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48 public Either<Error, TransactionManager<T>> commit(T _newRoot,final TreeOperationLog _log) {
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49 ChangeSet cs = tip.getChangeSet();
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50 long currentRevision = cs.revision();
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51 long nextRevision = currentRevision + 1;
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52
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53 ChangeList list = new ChangeList() {
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54 @Override
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55 public Iterator<TreeOperation> iterator(){
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56 return _log.iterator();
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57 }
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58 };
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59
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60 Node root = _newRoot.getAsNode();
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61 DefaultChangeSet newCs = new DefaultChangeSet(root, cs, list, uuid, nextRevision);
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62 DefaultTreeContext<T> newContext = new DefaultTreeContext<T>(_newRoot,newCs);
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63
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64 @SuppressWarnings("rawtypes")
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65 Reservation reservation = repository.makeReservation(tip, newContext);
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66 if(reservation == null) {
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67 return DefaultEither.newA((Error)new DefaultError());
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68 }
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69 Result r = writer.write(list);
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70 if(r != Result.SUCCESS) {
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71 return DefaultEither.newA((Error)new DefaultError());
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72 }
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73 try {
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74 updateDataSegment(uuid, treeName, list);
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75 } catch (IOException e) {
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76 e.printStackTrace();
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77 }
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78 reservation.confirm();
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79 TransactionManager<T> txManager = new NetworkTransactionManager<T>(treeName, writer, newContext, repository, uuid);
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80 return DefaultEither.newB(txManager);
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81 }
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82
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83 private void updateDataSegment(String _uuid, String _treeName, Iterable<TreeOperation> _log) throws IOException {
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84 DefaultTreeOperationLogContainer container = new DefaultTreeOperationLogContainer();
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85 container.setTreeName(_treeName);
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86 container.setUUID(_uuid);
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87 container.unconvert(_log);
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88 LogUpdateCodeSegment cs = new LogUpdateCodeSegment();
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89 cs.ods.update("log", container);
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90
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91 }
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92
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93 @Override
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94 public long getRevision()
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95 {
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96 ChangeSet cs = tip.getChangeSet();
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97 return cs.revision();
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98 }
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99
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100 @Override
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101 public String getUUID() {
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102 return uuid;
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103 }
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104
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105 }
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