Mercurial > hg > Database > jungle-network
view src/main/java/alice/jungle/persistent/PersistentTransactionManager.java @ 178:d6944d788121
fit Junglecore
author | tatsuki |
---|---|
date | Thu, 04 Sep 2014 13:12:25 +0900 |
parents | 6f104ab4eb81 |
children | 2828205bdc3a |
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package alice.jungle.persistent; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeListWriter; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Result; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TransactionManager; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TreeContext; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference.Reservation; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultEither; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultError; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error; public class PersistentTransactionManager implements TransactionManager { private final AtomicReservableReference<TreeContext> repository; private final TreeContext tip; private final ChangeListWriter writer; private final String uuid; private final String treeName; public PersistentTransactionManager(String _treeName, ChangeListWriter _writer,TreeContext _tip, AtomicReservableReference<TreeContext> _repository,String _uuid) { repository = _repository; tip = _tip; writer = _writer; uuid = _uuid; treeName = _treeName; } @Override public Either<Error, TransactionManager> commit(TreeNode _newRoot,final TreeOperationLog _log) { ChangeSet cs = tip.getChangeSet(); long currentRevision = cs.revision(); long nextRevision = currentRevision + 1; PersistentChangeList list = new PersistentChangeList(uuid, treeName, _log); TreeNode root = _newRoot; PersistentChangeSet newCs = new PersistentChangeSet(root, cs, list, uuid, treeName, nextRevision); DefaultTreeContext newContext = new DefaultTreeContext(_newRoot,newCs); @SuppressWarnings("rawtypes") Reservation reservation = repository.makeReservation(tip, newContext); if(reservation == null) { return DefaultEither.newA((Error)new DefaultError()); } Result r = writer.write(list); if(r != Result.SUCCESS) { return DefaultEither.newA((Error)new DefaultError()); } reservation.confirm(); TransactionManager txManager = new PersistentTransactionManager(treeName, writer, newContext, repository, uuid); return DefaultEither.newB(txManager); } @Override public long getRevision() { ChangeSet cs = tip.getChangeSet(); return cs.revision(); } @Override public String getUUID() { return uuid; } }