ExponentialBackoffDelay.java

/*
 * 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.sling.testing.teleporter.client;

/** Wait with exponential backoff, for retries */ 
public class ExponentialBackoffDelay {
    public static final float INCREASE_RATE = 1.2f;
    private int currentDelay;
    private final int endDelay;
    
    public ExponentialBackoffDelay(int startDelayMsec, int endDelayMsec) {
        currentDelay = startDelayMsec;
        endDelay = endDelayMsec;
    }
    
    public int getNextDelayMsec() {
        final int result = currentDelay;
        currentDelay = Math.min(endDelay, (int)(currentDelay * INCREASE_RATE));
        return result;
    }
    
    public void waitNextDelay() {
        try {
            final int toWait = getNextDelayMsec();
            Thread.sleep(toWait);
        } catch(InterruptedException ignored) {
        }
    }
}