juneau-rest/juneau-rest-client/src/main/java/org/apache/juneau/rest/client/BasicHttpRequestRetryHandler.java

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package org.apache.juneau.rest.client;

import java.io.*;

import org.apache.http.impl.client.*;
import org.apache.http.protocol.*;

/**
 * An extension of {@link StandardHttpRequestRetryHandler} that adds support for a retry interval.
 *
 * <h5 class='section'>See Also:</h5><ul>
 * 	<li class='link'><a class="doclink" href="../../../../../index.html#juneau-rest-client">juneau-rest-client</a>
 * </ul>
 */
public class BasicHttpRequestRetryHandler extends StandardHttpRequestRetryHandler {

	private final int retryInterval;

	/**
	 * Create the request retry handler.
	 *
	 * Uses the following list of non-retryable IOException classes:
	 * <ul>
	 * <li>InterruptedIOException</li>
	 * <li>UnknownHostException</li>
	 * <li>ConnectException</li>
	 * <li>SSLException</li>
	 * </ul>
	 *
	 * @param retryCount How many times to retry. <code>0</code> means no retries.
	 * @param retryInterval The time in milliseconds to sleep before trying again, or <code>&lt;=0</code> for no interval.
	 * @param requestSentRetryEnabled Specify <jk>true</jk> if it's OK to retry non-idempotent requests that have been sent.
	 */
	public BasicHttpRequestRetryHandler(int retryCount, int retryInterval, boolean requestSentRetryEnabled) {
		super(retryCount, requestSentRetryEnabled);
		this.retryInterval = retryInterval;
	}

	@Override
	public boolean retryRequest(IOException exception, int executionCount, HttpContext context) {
		if (retryInterval > 0) {
			try {
				Thread.sleep(retryInterval);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		return super.retryRequest(exception, executionCount, context);
	}
}