org.springframework.http.client.reactive.JettyClientHttpConnector Maven / Gradle / Ivy
/*
* Copyright 2002-2019 the original author or authors.
*
* Licensed 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
*
* https://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.
*/
package org.springframework.http.client.reactive;
import java.net.URI;
import java.util.function.Consumer;
import java.util.function.Function;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.reactive.client.ContentChunk;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import org.springframework.http.HttpMethod;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* {@link ClientHttpConnector} for the Jetty Reactive Streams HttpClient.
*
* @author Sebastien Deleuze
* @since 5.1
* @see Jetty ReactiveStreams HttpClient
*/
public class JettyClientHttpConnector implements ClientHttpConnector {
private final HttpClient httpClient;
private DataBufferFactory bufferFactory = new DefaultDataBufferFactory();
/**
* Default constructor that creates a new instance of {@link HttpClient}.
*/
public JettyClientHttpConnector() {
this(new HttpClient());
}
/**
* Constructor with an initialized {@link HttpClient}.
*/
public JettyClientHttpConnector(HttpClient httpClient) {
this(httpClient, null);
}
/**
* Constructor with an initialized {@link HttpClient} and configures it
* with the given {@link JettyResourceFactory}.
* @param httpClient the {@link HttpClient} to use
* @param resourceFactory the {@link JettyResourceFactory} to use
* @since 5.2
*/
public JettyClientHttpConnector(HttpClient httpClient, @Nullable JettyResourceFactory resourceFactory) {
Assert.notNull(httpClient, "HttpClient is required");
if (resourceFactory != null) {
httpClient.setExecutor(resourceFactory.getExecutor());
httpClient.setByteBufferPool(resourceFactory.getByteBufferPool());
httpClient.setScheduler(resourceFactory.getScheduler());
}
this.httpClient = httpClient;
}
/**
* Constructor with an {@link JettyResourceFactory} that will manage shared resources.
* @param resourceFactory the {@link JettyResourceFactory} to use
* @param customizer the lambda used to customize the {@link HttpClient}
* @deprecated as of 5.2, in favor of {@link JettyClientHttpConnector#JettyClientHttpConnector(HttpClient, JettyResourceFactory)}
*/
@Deprecated
public JettyClientHttpConnector(JettyResourceFactory resourceFactory, @Nullable Consumer customizer) {
this(new HttpClient(), resourceFactory);
if (customizer != null) {
customizer.accept(this.httpClient);
}
}
public void setBufferFactory(DataBufferFactory bufferFactory) {
this.bufferFactory = bufferFactory;
}
@Override
public Mono connect(HttpMethod method, URI uri,
Function> requestCallback) {
if (!uri.isAbsolute()) {
return Mono.error(new IllegalArgumentException("URI is not absolute: " + uri));
}
if (!this.httpClient.isStarted()) {
try {
this.httpClient.start();
}
catch (Exception ex) {
return Mono.error(ex);
}
}
JettyClientHttpRequest clientHttpRequest = new JettyClientHttpRequest(
this.httpClient.newRequest(uri).method(method.toString()), this.bufferFactory);
return requestCallback.apply(clientHttpRequest).then(Mono.from(
clientHttpRequest.getReactiveRequest().response((response, chunks) -> {
Flux content = Flux.from(chunks).map(this::toDataBuffer);
return Mono.just(new JettyClientHttpResponse(response, content));
})));
}
private DataBuffer toDataBuffer(ContentChunk chunk) {
// We must copy until this is resolved:
// https://github.com/eclipse/jetty.project/issues/2429
// Use copy instead of buffer wrapping because Callback#succeeded() is
// used not only to release the buffer but also to request more data
// which is a problem for codecs that buffer data.
DataBuffer buffer = this.bufferFactory.allocateBuffer(chunk.buffer.capacity());
buffer.write(chunk.buffer);
chunk.callback.succeeded();
return buffer;
}
}