001/*
002 * JPPF.
003 * Copyright (C) 2005-2018 JPPF Team.
004 * http://www.jppf.org
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.jppf.node.connection;
020
021/**
022 * This interface defines which parameters should be used to connect to the driver.
023 * <p>It gives the ability to create new sets of parameters whenever a connection attempt was unsuccessful,
024 * therefore providing the nodes with a failover strategy when the connection to a driver cannot be established.
025 * @author Laurent Cohen
026 * @since 4.1
027 */
028public interface DriverConnectionStrategy {
029  /**
030   * Get a new connection information, eventually based on the one that was previously used.
031   * @param currentInfo the {@link DriverConnectionInfo} that was previously used to connecto the driver,
032   * or {@code null} if the node is connecting for the first time. 
033   * @param context provides information on why a new connection is requested, so as to help deciding which connection information to provide.
034   * @return a new {@link DriverConnectionInfo} object that the node will use to connect to the driver.
035   */
036  DriverConnectionInfo nextConnectionInfo(DriverConnectionInfo currentInfo, ConnectionContext context);
037}