com.netflix.astyanax.connectionpool.RetryBackoffStrategy Maven / Gradle / Ivy
/*******************************************************************************
* 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 Return the next backoff delay in the strategy
*/
long getNextDelay();
/**
* Suspend the host for being bad (i.e. timing out too much)
*/
void suspend();
/**
* @return Number of failed attempts
*/
int getAttemptCount();
};
/**
* Create an instance of the strategy for a single host
*/
Instance createInstance();
}