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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * .
 *
 */

package org.apache.hc.client5.http.classic;

import java.io.IOException;

import org.apache.hc.client5.http.HttpRoute;
import org.apache.hc.client5.http.protocol.HttpClientContext;
import org.apache.hc.core5.annotation.Contract;
import org.apache.hc.core5.annotation.ThreadingBehavior;
import org.apache.hc.core5.http.ClassicHttpRequest;
import org.apache.hc.core5.http.ClassicHttpResponse;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.util.Args;

/**
 * Represents a single element in the client side classic request execution chain.
 *
 * @since 5.0
 */
@Contract(threading = ThreadingBehavior.STATELESS)
public interface ExecChain {

    final class Scope {

        public final String exchangeId;
        public final HttpRoute route;
        public final ClassicHttpRequest originalRequest;
        public final ExecRuntime execRuntime;
        public final HttpClientContext clientContext;

        public Scope(final String exchangeId, final HttpRoute route, final ClassicHttpRequest originalRequest, final ExecRuntime execRuntime, final HttpClientContext clientContext) {
            this.exchangeId = Args.notNull(exchangeId, "Exchange id");
            this.route = Args.notNull(route, "Route");
            this.originalRequest = Args.notNull(originalRequest, "Original request");
            this.execRuntime = Args.notNull(execRuntime, "Exec runtime");
            this.clientContext = clientContext != null ? clientContext : HttpClientContext.create();
        }

    }

    ClassicHttpResponse proceed(
            ClassicHttpRequest request,
            Scope scope) throws IOException, HttpException;

}