Mercurial > hg > Members > tatsuki > bench > jungle-core
view src/main/java/jp/ac/u_ryukyu/ie/cr/shoshi/jungle/transaction/DefaultTransactionManager.java @ 73:e97a59269bf5
change to Various
author | one |
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date | Wed, 27 Aug 2014 01:02:11 +0900 |
parents | 57e965b73c9e |
children | a4e2f1d45fdc |
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package jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction; import java.util.Iterator; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList; 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.store.operations.TreeOperation; 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 DefaultTransactionManager<T extends TreeNode<T>> implements TransactionManager<T> { private final AtomicReservableReference<TreeContext<T>> repository; private final TreeContext<T> tip; private final ChangeListWriter writer; private final String uuid; public DefaultTransactionManager(ChangeListWriter _writer,TreeContext<T> _tip, AtomicReservableReference<TreeContext<T>> _repository,String _uuid) { repository = _repository; tip = _tip; writer = _writer; uuid = _uuid; } @Override public Either<Error,TransactionManager<T>> commit(TreeNode<T> _newRoot,final TreeOperationLog _log) { ChangeSet<T> cs = tip.getChangeSet(); long currentRevision = cs.revision(); long nextRevision = currentRevision + 1; final String _treeName = cs.getTreeName(); ChangeList list = new ChangeList(){ @Override public Iterator<TreeOperation> iterator(){ return _log.iterator(); } @Override public String getTreeName(){ return _treeName; } @Override public String uuid(){ return uuid; } }; TreeNode<T> root = _newRoot; DefaultChangeSet<T> newCs = new DefaultChangeSet(root,cs,list,uuid, _treeName, nextRevision); DefaultTreeContext<T> newContext = new DefaultTreeContext<T>(_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){ reservation.confirm(); TransactionManager<T> txManager = new DefaultTransactionManager<T>(writer,newContext,repository,uuid); return DefaultEither.newB(txManager); } return DefaultEither.newA((Error)new DefaultError()); } @Override public String getUUID() { return uuid; } @Override public long getRevision() { ChangeSet<T> cs = tip.getChangeSet(); return cs.revision(); } }