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Lets developers make their applications more resilient by adding robust transient fault handling logic. Transient faults are errors that occur because of some temporary condition such as network connectivity issues or service unavailability. Typically, if you retry the operation that resulted in a transient error a short time later, you find that the error has disappeared.

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package com.github.rbuck.retry;

import static com.github.rbuck.retry.RetryState.RetryStateCommon.addDelay;

/**
 * Implementation for an incremental retry strategy with fixed initial and
 * incremental wait times.
 *
 * @author Robert Buck ([email protected])
 */
public class Incremental implements RetryStrategy {

    private final int maxRetries;
    private final long initialInterval;
    private final long incrementalInterval;

    public Incremental(int maxRetries, long initialInterval, long incrementalInterval) {
        this.maxRetries = maxRetries;
        this.initialInterval = initialInterval;
        this.incrementalInterval = incrementalInterval;
    }

    @Override
    public RetryState getRetryState() {
        return new RetryState() {

            private int retryCount;

            @Override
            public void delayRetry() {
                addDelay(getRetryDelay());
            }

            @Override
            public boolean hasRetries() {
                if (retryCount < maxRetries) {
                    retryCount++;
                    return true;
                }
                return false;
            }

            @Override
            public int getRetryCount() {
                return retryCount;
            }

            @Override
            public long getRetryDelay() {
                return initialInterval + incrementalInterval * retryCount;
            }
        };
    }
}