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/*
 *
 *  Copyright 2011 Netflix, Inc.
 *
 *     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.curator.retry;

import com.netflix.curator.RetryPolicy;
import com.netflix.curator.RetrySleeper;
import java.util.concurrent.TimeUnit;

abstract class SleepingRetry implements RetryPolicy
{
    private final int n;

    protected SleepingRetry(int n)
    {
        this.n = n;
    }

    // made public for testing
    public int getN()
    {
        return n;
    }

    public boolean allowRetry(int retryCount, long elapsedTimeMs, RetrySleeper sleeper)
    {
        if ( retryCount < n )
        {
            try
            {
                sleeper.sleepFor(getSleepTimeMs(retryCount, elapsedTimeMs), TimeUnit.MILLISECONDS);
            }
            catch ( InterruptedException e )
            {
                Thread.currentThread().interrupt();
                return false;
            }
            return true;
        }
        return false;
    }

    protected abstract int   getSleepTimeMs(int retryCount, long elapsedTimeMs);
}