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Transaction.java
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Transaction.java
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.internal.kernel.api;
import org.neo4j.internal.kernel.api.exceptions.InvalidTransactionTypeKernelException;
/**
* A transaction with the graph database.
*/
public interface Transaction extends AutoCloseable
{
enum Type
{
implicit,
explicit
}
/**
* The store id of a rolled back transaction.
*/
long ROLLBACK = -1;
/**
* The store id of a read-only transaction.
*/
long READ_ONLY = 0;
/**
* Marks this transaction as successful. When this transaction later gets {@link #close() closed}
* its changes, if any, will be committed. If this method hasn't been called or if {@link #failure()}
* has been called then any changes in this transaction will be rolled back as part of {@link #close() closing}.
*/
void success();
/**
* Marks this transaction as failed. No amount of calls to {@link #success()} will clear this flag.
* When {@link #close() closing} this transaction any changes will be rolled back.
*/
void failure();
/**
* @return The Read operations of the graph.
*/
Read dataRead();
/**
* @return The Write operations of the graph.
* @throws InvalidTransactionTypeKernelException when transaction cannot be upgraded to a write transaction. This
* can happen when there have been schema modifications.
*/
Write dataWrite() throws InvalidTransactionTypeKernelException;
/**
* @return The explicit index read operations of the graph.
*/
ExplicitIndexRead indexRead();
/**
* @return The explicit index write operations of the graph.
*/
ExplicitIndexWrite indexWrite();
/**
* @return Token operations
*/
Token token();
/**
* @return The schema index read operations of the graph, used for finding indexes.
*/
SchemaRead schemaRead();
/**
* @return The schema index write operations of the graph, used for creating and dropping indexes and constraints.
*/
SchemaWrite schemaWrite();
/**
* @return The lock operations of the graph.
*/
Locks locks();
/**
* @return The cursor factory
*/
CursorFactory cursors();
}