/* * Copyright 2009 Amit Levy, Jeff Prouty, Rylan Hawkins * * 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 edu.washington.cs.cse490h.donut.service; public abstract class AbstractRetriable<T, E> { private int retries = 3; public AbstractRetriable() { super(); } public void setRetries(int tries) { this.retries = tries; } public int getRetries() { return retries; } public T get(E name) throws RetryFailedException { Exception exception = null; for (int i = 0; i < getRetries(); ++i) { try { return tryOne(name); } catch (Exception e) { exception = e; e.printStackTrace(); } } throw new RetryFailedException(exception); } protected abstract T tryOne(E name) throws Exception; }