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/*
* 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);
}