/* * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.controller.md.sal.common.api.data; import org.opendaylight.yangtools.concepts.Path; /** * Base interface that provides access to a conceptual data tree store and also provides the ability to * subscribe for changes to data under a given branch of the tree. * *
* All operations on the data tree are performed via one of the transactions: *
* These transactions provide a stable isolated view of data tree, which is * guaranteed to be not affected by other concurrent transactions, until * transaction is committed. * *
* For a detailed explanation of how transaction are isolated and how transaction-local * changes are committed to global data tree, see * {@link AsyncReadTransaction}, {@link AsyncWriteTransaction}, * {@link AsyncReadWriteTransaction} and {@link AsyncWriteTransaction#submit()}. * * *
* It is strongly recommended to use the type of transaction, which * provides only the minimal capabilities you need. This allows for * optimizations at the data broker / data store level. For example, * implementations may optimize the transaction for reading if they know ahead * of time that you only need to read data - such as not keeping additional meta-data, * which may be required for write transactions. * *
* Implementation Note: This interface is not intended to be implemented * by users of MD-SAL, but only to be consumed by them. * * @param
* Type of path (subtree identifier), which represents location in
* tree
* @param , D> extends AsyncDataTransactionFactory {
@Override
AsyncReadOnlyTransaction newReadOnlyTransaction();
@Override
AsyncReadWriteTransaction newReadWriteTransaction();
@Override
AsyncWriteTransaction newWriteOnlyTransaction();
}