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

import java.io.IOException;

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;

/**
 * Abstract request execution handler in a classic client side request execution chain.
 * Handlers can either be a decorator around another element that implements a cross
 * cutting aspect or a self-contained executor capable of producing a response
 * for the given request.
 * 

* Important: please note it is required for decorators that implement post execution aspects * or response post-processing of any sort to release resources associated with the response * by calling {@link ClassicHttpResponse#close()} methods in case of an I/O, protocol or * runtime exception, or in case the response is not propagated to the caller. *

* * @since 4.3 */ @Contract(threading = ThreadingBehavior.STATELESS) public interface ExecChainHandler { /** * Executes the actual HTTP request. The handler can choose to return * a response message or delegate request execution to the next element * in the execution chain. * * @param request the actual request. * @param scope the execution scope . * @param chain the next element in the request execution chain. */ ClassicHttpResponse execute( ClassicHttpRequest request, ExecChain.Scope scope, ExecChain chain) throws IOException, HttpException; }




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