ok2c commented on a change in pull request #304: URL: https://github.com/apache/httpcomponents-client/pull/304#discussion_r619841814
########## File path: httpclient5-testing/src/main/java/org/apache/hc/client5/testing/async/ServiceUnavailableAsyncDecorator.java ########## @@ -0,0 +1,138 @@ +/* + * ==================================================================== + * 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.testing.async; + +import org.apache.hc.core5.function.Resolver; +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.HttpHeaders; +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.HttpVersion; +import org.apache.hc.core5.http.ProtocolVersion; +import org.apache.hc.core5.http.message.BasicHttpResponse; +import org.apache.hc.core5.http.nio.AsyncServerExchangeHandler; +import org.apache.hc.core5.http.nio.CapacityChannel; +import org.apache.hc.core5.http.nio.DataStreamChannel; +import org.apache.hc.core5.http.nio.ResponseChannel; +import org.apache.hc.core5.http.protocol.HttpContext; +import org.apache.hc.core5.util.Args; +import org.apache.hc.core5.util.TimeValue; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.List; +import java.util.concurrent.atomic.AtomicBoolean; + +public class ServiceUnavailableAsyncDecorator implements AsyncServerExchangeHandler { + + private final AsyncServerExchangeHandler exchangeHandler; + private final Resolver<HttpRequest, TimeValue> serviceAvailabilityResolver; + private final AtomicBoolean serviceUnavailable; + + public ServiceUnavailableAsyncDecorator(final AsyncServerExchangeHandler exchangeHandler, + final Resolver<HttpRequest, TimeValue> serviceAvailabilityResolver) { + this.exchangeHandler = Args.notNull(exchangeHandler, "Exchange handler"); + this.serviceAvailabilityResolver = Args.notNull(serviceAvailabilityResolver, "Service availability resolver"); + this.serviceUnavailable = new AtomicBoolean(); + } + + @Override + public void handleRequest(final HttpRequest request, + final EntityDetails entityDetails, + final ResponseChannel responseChannel, + final HttpContext context) throws HttpException, IOException { + final TimeValue retryAfter = serviceAvailabilityResolver.resolve(request); + serviceUnavailable.set(TimeValue.isPositive(retryAfter)); + if (serviceUnavailable.get()) { + final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_SERVICE_UNAVAILABLE); + response.addHeader(HttpHeaders.RETRY_AFTER, Long.toString(retryAfter.toSeconds())); + final ProtocolVersion version = request.getVersion(); + if (version != null && version.compareToVersion(HttpVersion.HTTP_2) < 0) { Review comment: @michael-o Not at all. Thank you for a thorough review! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
