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The AWS SDK for Java - Core module holds the classes that are used by the individual service clients to interact with Amazon Web Services. Users need to depend on aws-java-sdk artifact for accessing individual client classes.

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/*
 * Copyright 2010-2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.http.impl.client;

import java.io.IOException;

import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.protocol.HttpContext;

import com.amazonaws.annotation.ThreadSafe;
import com.amazonaws.util.AWSRequestMetrics;
import com.amazonaws.util.AWSRequestMetrics.Field;

@ThreadSafe
public class SdkHttpRequestRetryHandler extends DefaultHttpRequestRetryHandler {
    public static final SdkHttpRequestRetryHandler Singleton = new SdkHttpRequestRetryHandler();
    private SdkHttpRequestRetryHandler() {}

    @Override public boolean retryRequest(
            final IOException exception,
            int executionCount,
            final HttpContext context) {
        boolean retry = super.retryRequest(exception, executionCount, context);
        if (retry) {
            AWSRequestMetrics awsRequestMetrics = (AWSRequestMetrics) context
                    .getAttribute(AWSRequestMetrics.SIMPLE_NAME);
            if (awsRequestMetrics != null) {
                awsRequestMetrics.incrementCounter(Field.HttpClientRetryCount);
            }
        }
        return retry;
    }
}