| /* |
| * ==================================================================== |
| * 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.core5.http.nio.support; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.hc.core5.concurrent.CallbackContribution; |
| import org.apache.hc.core5.concurrent.FutureCallback; |
| import org.apache.hc.core5.function.Supplier; |
| 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.Message; |
| import org.apache.hc.core5.http.nio.AsyncEntityConsumer; |
| import org.apache.hc.core5.http.nio.AsyncRequestConsumer; |
| import org.apache.hc.core5.http.nio.CapacityChannel; |
| import org.apache.hc.core5.http.protocol.HttpContext; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Basic implementation of {@link AsyncRequestConsumer} that represents the request message as |
| * a {@link Message} and relies on a {@link AsyncEntityConsumer} to process request entity stream. |
| * |
| * @since 5.0 |
| */ |
| public class BasicRequestConsumer<T> implements AsyncRequestConsumer<Message<HttpRequest, T>> { |
| |
| private final Supplier<AsyncEntityConsumer<T>> dataConsumerSupplier; |
| private final AtomicReference<AsyncEntityConsumer<T>> dataConsumerRef; |
| |
| public BasicRequestConsumer(final Supplier<AsyncEntityConsumer<T>> dataConsumerSupplier) { |
| this.dataConsumerSupplier = Args.notNull(dataConsumerSupplier, "Data consumer supplier"); |
| this.dataConsumerRef = new AtomicReference<>(null); |
| } |
| |
| public BasicRequestConsumer(final AsyncEntityConsumer<T> dataConsumer) { |
| this(() -> dataConsumer); |
| } |
| |
| @Override |
| public void consumeRequest( |
| final HttpRequest request, |
| final EntityDetails entityDetails, |
| final HttpContext httpContext, |
| final FutureCallback<Message<HttpRequest, T>> resultCallback) throws HttpException, IOException { |
| Args.notNull(request, "Request"); |
| if (entityDetails != null) { |
| final AsyncEntityConsumer<T> dataConsumer = dataConsumerSupplier.get(); |
| if (dataConsumer == null) { |
| throw new HttpException("Supplied data consumer is null"); |
| } |
| dataConsumerRef.set(dataConsumer); |
| |
| dataConsumer.streamStart(entityDetails, new CallbackContribution<T>(resultCallback) { |
| |
| @Override |
| public void completed(final T body) { |
| final Message<HttpRequest, T> result = new Message<>(request, body); |
| if (resultCallback != null) { |
| resultCallback.completed(result); |
| } |
| } |
| |
| }); |
| } else { |
| final Message<HttpRequest, T> result = new Message<>(request, null); |
| if (resultCallback != null) { |
| resultCallback.completed(result); |
| } |
| } |
| } |
| |
| @Override |
| public void updateCapacity(final CapacityChannel capacityChannel) throws IOException { |
| final AsyncEntityConsumer<T> dataConsumer = dataConsumerRef.get(); |
| dataConsumer.updateCapacity(capacityChannel); |
| } |
| |
| @Override |
| public void consume(final ByteBuffer src) throws IOException { |
| final AsyncEntityConsumer<T> dataConsumer = dataConsumerRef.get(); |
| dataConsumer.consume(src); |
| } |
| |
| @Override |
| public void streamEnd(final List<? extends Header> trailers) throws HttpException, IOException { |
| final AsyncEntityConsumer<T> dataConsumer = dataConsumerRef.get(); |
| dataConsumer.streamEnd(trailers); |
| } |
| |
| @Override |
| public void failed(final Exception cause) { |
| releaseResources(); |
| } |
| |
| @Override |
| public void releaseResources() { |
| final AsyncEntityConsumer<T> dataConsumer = dataConsumerRef.getAndSet(null); |
| if (dataConsumer != null) { |
| dataConsumer.releaseResources(); |
| } |
| } |
| |
| } |