| /* |
| * ==================================================================== |
| * 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 |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.client5.http.impl.async; |
| |
| import java.io.IOException; |
| import java.io.InterruptedIOException; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.hc.client5.http.ConnectionKeepAliveStrategy; |
| import org.apache.hc.client5.http.HttpRoute; |
| import org.apache.hc.client5.http.UserTokenHandler; |
| import org.apache.hc.client5.http.async.AsyncExecCallback; |
| import org.apache.hc.client5.http.async.AsyncExecChain; |
| import org.apache.hc.client5.http.async.AsyncExecChainHandler; |
| import org.apache.hc.client5.http.async.AsyncExecRuntime; |
| import org.apache.hc.client5.http.protocol.HttpClientContext; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.Internal; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.concurrent.CancellableDependency; |
| import org.apache.hc.core5.http.EntityDetails; |
| import org.apache.hc.core5.http.Header; |
| import org.apache.hc.core5.http.HttpException; |
| import org.apache.hc.core5.http.HttpRequest; |
| import org.apache.hc.core5.http.HttpResponse; |
| import org.apache.hc.core5.http.HttpStatus; |
| import org.apache.hc.core5.http.message.RequestLine; |
| import org.apache.hc.core5.http.nio.AsyncClientExchangeHandler; |
| import org.apache.hc.core5.http.nio.AsyncDataConsumer; |
| import org.apache.hc.core5.http.nio.AsyncEntityProducer; |
| import org.apache.hc.core5.http.nio.CapacityChannel; |
| import org.apache.hc.core5.http.nio.DataStreamChannel; |
| import org.apache.hc.core5.http.nio.RequestChannel; |
| import org.apache.hc.core5.http.protocol.HttpContext; |
| import org.apache.hc.core5.util.TimeValue; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Usually the last HTTP/1.1 request execution handler in the asynchronous |
| * request execution chain that is responsible for execution of |
| * request / response exchanges with the opposite endpoint. |
| * |
| * @since 5.0 |
| */ |
| @Contract(threading = ThreadingBehavior.STATELESS) |
| @Internal |
| class HttpAsyncMainClientExec implements AsyncExecChainHandler { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private final ConnectionKeepAliveStrategy keepAliveStrategy; |
| private final UserTokenHandler userTokenHandler; |
| |
| HttpAsyncMainClientExec(final ConnectionKeepAliveStrategy keepAliveStrategy, final UserTokenHandler userTokenHandler) { |
| this.keepAliveStrategy = keepAliveStrategy; |
| this.userTokenHandler = userTokenHandler; |
| } |
| |
| @Override |
| public void execute( |
| final HttpRequest request, |
| final AsyncEntityProducer entityProducer, |
| final AsyncExecChain.Scope scope, |
| final AsyncExecChain chain, |
| final AsyncExecCallback asyncExecCallback) throws HttpException, IOException { |
| final String exchangeId = scope.exchangeId; |
| final HttpRoute route = scope.route; |
| final CancellableDependency operation = scope.cancellableDependency; |
| final HttpClientContext clientContext = scope.clientContext; |
| final AsyncExecRuntime execRuntime = scope.execRuntime; |
| |
| if (log.isDebugEnabled()) { |
| log.debug(exchangeId + ": executing " + new RequestLine(request)); |
| } |
| |
| final AtomicInteger messageCountDown = new AtomicInteger(2); |
| final AsyncClientExchangeHandler internalExchangeHandler = new AsyncClientExchangeHandler() { |
| |
| private final AtomicReference<AsyncDataConsumer> entityConsumerRef = new AtomicReference<>(null); |
| |
| @Override |
| public void releaseResources() { |
| final AsyncDataConsumer entityConsumer = entityConsumerRef.getAndSet(null); |
| if (entityConsumer != null) { |
| entityConsumer.releaseResources(); |
| } |
| } |
| |
| @Override |
| public void failed(final Exception cause) { |
| final AsyncDataConsumer entityConsumer = entityConsumerRef.getAndSet(null); |
| if (entityConsumer != null) { |
| entityConsumer.releaseResources(); |
| } |
| execRuntime.markConnectionNonReusable(); |
| asyncExecCallback.failed(cause); |
| } |
| |
| @Override |
| public void cancel() { |
| failed(new InterruptedIOException()); |
| } |
| |
| @Override |
| public void produceRequest( |
| final RequestChannel channel, |
| final HttpContext context) throws HttpException, IOException { |
| channel.sendRequest(request, entityProducer, context); |
| if (entityProducer == null) { |
| messageCountDown.decrementAndGet(); |
| } |
| } |
| |
| @Override |
| public int available() { |
| return entityProducer.available(); |
| } |
| |
| @Override |
| public void produce(final DataStreamChannel channel) throws IOException { |
| entityProducer.produce(new DataStreamChannel() { |
| |
| @Override |
| public void requestOutput() { |
| channel.requestOutput(); |
| } |
| |
| @Override |
| public int write(final ByteBuffer src) throws IOException { |
| return channel.write(src); |
| } |
| |
| @Override |
| public void endStream(final List<? extends Header> trailers) throws IOException { |
| channel.endStream(trailers); |
| if (messageCountDown.decrementAndGet() <= 0) { |
| asyncExecCallback.completed(); |
| } |
| } |
| |
| @Override |
| public void endStream() throws IOException { |
| channel.endStream(); |
| if (messageCountDown.decrementAndGet() <= 0) { |
| asyncExecCallback.completed(); |
| } |
| } |
| |
| }); |
| } |
| |
| @Override |
| public void consumeInformation( |
| final HttpResponse response, |
| final HttpContext context) throws HttpException, IOException { |
| asyncExecCallback.handleInformationResponse(response); |
| } |
| |
| @Override |
| public void consumeResponse( |
| final HttpResponse response, |
| final EntityDetails entityDetails, |
| final HttpContext context) throws HttpException, IOException { |
| entityConsumerRef.set(asyncExecCallback.handleResponse(response, entityDetails)); |
| if (response.getCode() >= HttpStatus.SC_CLIENT_ERROR) { |
| messageCountDown.decrementAndGet(); |
| } |
| final TimeValue keepAliveDuration = keepAliveStrategy.getKeepAliveDuration(response, clientContext); |
| Object userToken = clientContext.getUserToken(); |
| if (userToken == null) { |
| userToken = userTokenHandler.getUserToken(route, clientContext); |
| clientContext.setAttribute(HttpClientContext.USER_TOKEN, userToken); |
| } |
| execRuntime.markConnectionReusable(userToken, keepAliveDuration); |
| if (entityDetails == null) { |
| execRuntime.validateConnection(); |
| if (messageCountDown.decrementAndGet() <= 0) { |
| asyncExecCallback.completed(); |
| } |
| } |
| } |
| |
| @Override |
| public void updateCapacity(final CapacityChannel capacityChannel) throws IOException { |
| final AsyncDataConsumer entityConsumer = entityConsumerRef.get(); |
| if (entityConsumer != null) { |
| entityConsumer.updateCapacity(capacityChannel); |
| } else { |
| capacityChannel.update(Integer.MAX_VALUE); |
| } |
| } |
| |
| @Override |
| public void consume(final ByteBuffer src) throws IOException { |
| final AsyncDataConsumer entityConsumer = entityConsumerRef.get(); |
| if (entityConsumer != null) { |
| entityConsumer.consume(src); |
| } |
| } |
| |
| @Override |
| public void streamEnd(final List<? extends Header> trailers) throws HttpException, IOException { |
| final AsyncDataConsumer entityConsumer = entityConsumerRef.getAndSet(null); |
| if (entityConsumer != null) { |
| entityConsumer.streamEnd(trailers); |
| } else { |
| execRuntime.validateConnection(); |
| } |
| if (messageCountDown.decrementAndGet() <= 0) { |
| asyncExecCallback.completed(); |
| } |
| } |
| |
| }; |
| |
| if (log.isDebugEnabled()) { |
| operation.setDependency(execRuntime.execute( |
| exchangeId, |
| new LoggingAsyncClientExchangeHandler(log, exchangeId, internalExchangeHandler), |
| clientContext)); |
| } else { |
| operation.setDependency(execRuntime.execute(exchangeId, internalExchangeHandler, clientContext)); |
| } |
| } |
| |
| } |