I/O and Reactive Streams back pressure, along with adapters for Reactor Netty, reactive Jetty HttpClient and Apache HttpComponents. The higher level WebClient used in applications builds on this basic requests with. There is built-in support for the following: • Reactor Netty • Jetty Reactive HttpClient • Apache HttpComponents • Others can be plugged via ClientHttpConnector. 2.1. Configuration Reactor Netty To customize Reactor Netty settings, provide a pre-configured HttpClient: Java HttpClient httpClient = HttpClient.create().secure(sslSpec -> ...); WebClient webClient = WebClient.builder()

import org.apache.http.HttpHost; import org.apache.http.HttpRequest; import org.apache.http.client.HttpClient; import org.apache.http.conn.routing.HttpRoutePlanner; import org.apache.http.impl.client.HttpClientBuilder; com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); } import org.apache.http.HttpHost import org.apache.http.HttpRequest import org.apache.http.client.HttpClient import org.apache.http.conn.routing.HttpRoutePlanner import org.apache.http.impl.client.HttpClientBuilder

application classpath. In order of preference, the following clients are supported: 1. Apache HttpClient 2. OkHttp 3. Simple JDK client (HttpURLConnection) If multiple clients are available on the of a proxy for all hosts except 192.168.0.5: Java import org.apache.hc.client5.http.classic.HttpClient; import org.apache.hc.client5.http.impl.classic.HttpClientBuilder; import org.apache.hc.client5 com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); }

application classpath. In order of preference, the following clients are supported: 1. Apache HttpClient 2. OkHttp 3. Simple JDK client (HttpURLConnection) If multiple clients are available on the of a proxy for all hosts except 192.168.0.5: Java import org.apache.hc.client5.http.classic.HttpClient; import org.apache.hc.client5.http.impl.classic.HttpClientBuilder; import org.apache.hc.client5 com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); }

proxy for all hosts except 192.168.0.5: 393 Java import org.apache.hc.client5.http.classic.HttpClient; import org.apache.hc.client5.http.impl.classic.HttpClientBuilder; import org.apache.hc.client5 com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); } determineProxy(target, context); } } } 394 Kotlin import org.apache.hc.client5.http.classic.HttpClient import org.apache.hc.client5.http.impl.classic.HttpClientBuilder import org.apache.hc.client5.http

proxy for all hosts except 192.168.0.5: 393 Java import org.apache.hc.client5.http.classic.HttpClient; import org.apache.hc.client5.http.impl.classic.HttpClientBuilder; import org.apache.hc.client5 com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); } determineProxy(target, context); } } } 394 Kotlin import org.apache.hc.client5.http.classic.HttpClient import org.apache.hc.client5.http.impl.classic.HttpClientBuilder import org.apache.hc.client5.http

application classpath. In order of preference, the following clients are supported: 1. Apache HttpClient 2. OkHttp 3. Simple JDK client (HttpURLConnection) If multiple clients are available on the import org.apache.http.HttpHost; import org.apache.http.HttpRequest; import org.apache.http.client.HttpClient; import org.apache.http.conn.routing.HttpRoutePlanner; import org.apache.http.impl.client.HttpClientBuilder; com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); }

application classpath. In order of preference, the following clients are supported: 1. Apache HttpClient 2. OkHttp 3. Simple JDK client (HttpURLConnection) If multiple clients are available on the import org.apache.http.HttpHost; import org.apache.http.HttpRequest; import org.apache.http.client.HttpClient; import org.apache.http.conn.routing.HttpRoutePlanner; import org.apache.http.impl.client.HttpClientBuilder; com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); }

proxy for all hosts except 192.168.0.5: 390 Java import org.apache.hc.client5.http.classic.HttpClient; import org.apache.hc.client5.http.impl.classic.HttpClientBuilder; import org.apache.hc.client5 com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); } determineProxy(target, context); } } } 391 Kotlin import org.apache.hc.client5.http.classic.HttpClient import org.apache.hc.client5.http.impl.classic.HttpClientBuilder import org.apache.hc.client5.http

proxy for all hosts except 192.168.0.5: 393 Java import org.apache.hc.client5.http.classic.HttpClient; import org.apache.hc.client5.http.impl.classic.HttpClientBuilder; import org.apache.hc.client5 com")); HttpClient httpClient = HttpClientBuilder.create().setRoutePlanner(routePlanner).build(); restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient)); } determineProxy(target, context); } } } 394 Kotlin import org.apache.hc.client5.http.classic.HttpClient import org.apache.hc.client5.http.impl.classic.HttpClientBuilder import org.apache.hc.client5.http