/******************************************************************************* * Copyright 2011 Netflix * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package com.netflix.astyanax.connectionpool; /** * Strategy used to calculate how much to back off for each subsequent attempt * to reconnect to a downed host * * @author elandau * */ public interface RetryBackoffStrategy { public interface Callback { boolean tryConnect(int attemptCount); } public interface Instance { /** * Start the reconnect process */ void begin(); /** * Called when a connection was established successfully */ void success(); /** * Return the next backoff delay in the strategy * * @return */ long getNextDelay(); /** * Suspend the host for being bad (i.e. timing out too much) */ void suspend(); int getAttemptCount(); }; /** * Create an instance of the strategy for a single host * * @return */ Instance createInstance(); }