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The AWS Java SDK for Amazon SQS module holds the client classes that are used for communicating with Amazon Simple Queue Service

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/*
 * Copyright 2012-2018 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.services.sqs.internal;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;

import com.amazonaws.Request;
import com.amazonaws.handlers.AbstractRequestHandler;

public class SQSRequestHandler extends AbstractRequestHandler {

    private static final Map nonstandardEndpointMap = new HashMap();
    static {
        nonstandardEndpointMap.put("queue.amazonaws.com", "sqs.us-east-1.amazonaws.com");
        nonstandardEndpointMap.put("us-west-1.queue.amazonaws.com", "sqs.us-west-1.amazonaws.com");
        nonstandardEndpointMap.put("us-west-2.queue.amazonaws.com", "sqs.us-west-2.amazonaws.com");
        nonstandardEndpointMap.put("eu-west-1.queue.amazonaws.com", "sqs.eu-west-1.amazonaws.com");
        nonstandardEndpointMap.put("ap-southeast-1.queue.amazonaws.com", "sqs.ap-southeast-1.amazonaws.com");
        nonstandardEndpointMap.put("ap-northeast-1.queue.amazonaws.com", "sqs.ap-northeast-1.amazonaws.com");
        nonstandardEndpointMap.put("sa-east-1.queue.amazonaws.com", "sqs.sa-east-1.amazonaws.com");
        nonstandardEndpointMap.put("us-gov-west-1.queue.amazonaws.com", "sqs.us-gov-west-1.amazonaws.com");
        nonstandardEndpointMap.put("ap-southeast-2.queue.amazonaws.com", "sqs.ap-southeast-2.amazonaws.com");
    }

    @Override
    public void beforeRequest(Request request) {
        URI endpoint = request.getEndpoint();

        // If the request is using a non-standard endpoint, then
        // alter it to use the corresponding, standard endpoint
        if (nonstandardEndpointMap.containsKey(endpoint.getHost())) {
            String newHost = nonstandardEndpointMap.get(endpoint.getHost());
            String newEndpoint = endpoint.toString().replaceFirst(endpoint.getHost(), newHost);
            request.setEndpoint(URI.create(newEndpoint));
        }
    }
}