| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.twill.zookeeper; |
| |
| /** |
| * Provides strategy to use for operation retries. |
| */ |
| public interface RetryStrategy { |
| |
| /** |
| * Defines ZooKeeper operation type that triggers retry. |
| */ |
| enum OperationType { |
| CREATE, |
| EXISTS, |
| GET_CHILDREN, |
| GET_DATA, |
| SET_DATA, |
| DELETE, |
| SET_ACL, |
| GET_ACL |
| } |
| |
| /** |
| * Returns the number of milliseconds to wait before retrying the operation. |
| * |
| * @param failureCount Number of times that the request has been failed. |
| * @param startTime Timestamp in milliseconds that the request starts. |
| * @param type Type of operation tried to perform. |
| * @param path The path that the operation is acting on. |
| * @return Number of milliseconds to wait before retrying the operation. Returning {@code 0} means |
| * retry it immediately, while negative means abort the operation. |
| */ |
| long nextRetry(int failureCount, long startTime, OperationType type, String path); |
| } |