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/*
 * Copyright (C) 2022-2022 Huawei Technologies Co., Ltd. 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.
 * 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.
 */

package com.huawei.discovery.entity;

import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.nio.ContentEncoder;
import org.apache.http.nio.IOControl;
import org.apache.http.nio.protocol.HttpAsyncRequestProducer;
import org.apache.http.protocol.HttpContext;

import java.io.IOException;
import java.util.function.Function;

/**
 * HttpAsyncRequestProducer修饰器, 处理http request
 *
 * @author zhouss
 * @since 2022-10-11
 */
public class HttpAsyncRequestProducerDecorator implements HttpAsyncRequestProducer {
    private final HttpAsyncRequestProducer httpAsyncRequestProducer;
    private final Function requestDecorateFunc;
    private final Function hostDecorateFunc;

    /**
     * 构造器
     *
     * @param httpAsyncRequestProducer 原始producer
     * @param requestDecorateFunc   请求修饰器
     * @param hostDecorateFunc      地址修饰器
     */
    public HttpAsyncRequestProducerDecorator(
            HttpAsyncRequestProducer httpAsyncRequestProducer,
            Function requestDecorateFunc,
            Function hostDecorateFunc) {
        this.httpAsyncRequestProducer = httpAsyncRequestProducer;
        this.requestDecorateFunc = requestDecorateFunc;
        this.hostDecorateFunc = hostDecorateFunc;
    }

    @Override
    public HttpHost getTarget() {
        return hostDecorateFunc.apply(httpAsyncRequestProducer.getTarget());
    }

    @Override
    public HttpRequest generateRequest() throws IOException, HttpException {
        return requestDecorateFunc.apply(httpAsyncRequestProducer.generateRequest());
    }

    @Override
    public void produceContent(ContentEncoder encoder, IOControl ioControl) throws IOException {
        httpAsyncRequestProducer.produceContent(encoder, ioControl);
    }

    @Override
    public void requestCompleted(HttpContext context) {
        httpAsyncRequestProducer.requestCompleted(context);
    }

    @Override
    public void failed(Exception ex) {
        httpAsyncRequestProducer.failed(ex);
    }

    @Override
    public boolean isRepeatable() {
        return httpAsyncRequestProducer.isRepeatable();
    }

    @Override
    public void resetRequest() throws IOException {
        httpAsyncRequestProducer.resetRequest();
    }

    @Override
    public void close() throws IOException {
        httpAsyncRequestProducer.close();
    }
}