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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
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.hc.core5.http.impl.bootstrap;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import org.apache.hc.core5.annotation.Internal;
import org.apache.hc.core5.concurrent.DefaultThreadFactory;
import org.apache.hc.core5.concurrent.FutureCallback;
import org.apache.hc.core5.function.Callback;
import org.apache.hc.core5.function.Decorator;
import org.apache.hc.core5.function.Resolver;
import org.apache.hc.core5.http.HttpHost;
import org.apache.hc.core5.http.impl.DefaultAddressResolver;
import org.apache.hc.core5.io.CloseMode;
import org.apache.hc.core5.reactor.ConnectionInitiator;
import org.apache.hc.core5.reactor.DefaultConnectingIOReactor;
import org.apache.hc.core5.reactor.IOEventHandlerFactory;
import org.apache.hc.core5.reactor.IOReactorConfig;
import org.apache.hc.core5.reactor.IOReactorService;
import org.apache.hc.core5.reactor.IOReactorStatus;
import org.apache.hc.core5.reactor.IOSession;
import org.apache.hc.core5.reactor.IOSessionListener;
import org.apache.hc.core5.util.Args;
import org.apache.hc.core5.util.TimeValue;
import org.apache.hc.core5.util.Timeout;

/**
 * Protocol agnostic client side I/O session initiator.
 *
 * @since 5.0
 */
public class AsyncRequester extends AbstractConnectionInitiatorBase implements IOReactorService {

    private final DefaultConnectingIOReactor ioReactor;
    private final Resolver addressResolver;

    @Internal
    public AsyncRequester(
            final IOEventHandlerFactory eventHandlerFactory,
            final IOReactorConfig ioReactorConfig,
            final Decorator ioSessionDecorator,
            final Callback exceptionCallback,
            final IOSessionListener sessionListener,
            final Callback sessionShutdownCallback,
            final Resolver addressResolver) {
        this.ioReactor = new DefaultConnectingIOReactor(
                eventHandlerFactory,
                ioReactorConfig,
                new DefaultThreadFactory("requester-dispatch", true),
                ioSessionDecorator,
                exceptionCallback,
                sessionListener,
                sessionShutdownCallback);
        this.addressResolver = addressResolver != null ? addressResolver : DefaultAddressResolver.INSTANCE;
    }

    @Override
    ConnectionInitiator getIOReactor() {
        return ioReactor;
    }

    public Future requestSession(
            final HttpHost host,
            final Timeout timeout,
            final Object attachment,
            final FutureCallback callback) {
        Args.notNull(host, "Host");
        Args.notNull(timeout, "Timeout");
        return connect(host, addressResolver.resolve(host), null, timeout, attachment, callback);
    }

    @Override
    public void start() {
        ioReactor.start();
    }

    @Override
    public IOReactorStatus getStatus() {
        return ioReactor.getStatus();
    }

    @Override
    public void initiateShutdown() {
        ioReactor.initiateShutdown();
    }

    @Override
    public void awaitShutdown(final TimeValue waitTime) throws InterruptedException {
        ioReactor.awaitShutdown(waitTime);
    }

    @Override
    public void close(final CloseMode closeMode) {
        ioReactor.close(closeMode);
    }

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

}