/*
* Copyright 2002-2016 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
*
* 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.
*/
package org.springframework.http.server.reactive;
import io.undertow.server.HttpServerExchange;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import org.springframework.util.Assert;
/**
* Adapt {@link HttpHandler} to the Undertow {@link io.undertow.server.HttpHandler}.
*
* @author Marek Hawrylczak
* @author Rossen Stoyanchev
* @author Arjen Poutsma
* @since 5.0
*/
public class UndertowHttpHandlerAdapter implements io.undertow.server.HttpHandler {
private static final Log logger = LogFactory.getLog(UndertowHttpHandlerAdapter.class);
private final HttpHandler httpHandler;
private DataBufferFactory bufferFactory = new DefaultDataBufferFactory(false);
public UndertowHttpHandlerAdapter(HttpHandler httpHandler) {
Assert.notNull(httpHandler, "HttpHandler must not be null");
this.httpHandler = httpHandler;
}
public void setDataBufferFactory(DataBufferFactory bufferFactory) {
Assert.notNull(bufferFactory, "DataBufferFactory must not be null");
this.bufferFactory = bufferFactory;
}
public DataBufferFactory getDataBufferFactory() {
return this.bufferFactory;
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
ServerHttpRequest request = new UndertowServerHttpRequest(exchange, getDataBufferFactory());
ServerHttpResponse response = new UndertowServerHttpResponse(exchange, getDataBufferFactory());
HandlerResultSubscriber resultSubscriber = new HandlerResultSubscriber(exchange);
this.httpHandler.handle(request, response).subscribe(resultSubscriber);
}
private class HandlerResultSubscriber implements Subscriber<Void> {
private final HttpServerExchange exchange;
public HandlerResultSubscriber(HttpServerExchange exchange) {
this.exchange = exchange;
}
@Override
public void onSubscribe(Subscription subscription) {
subscription.request(Long.MAX_VALUE);
}
@Override
public void onNext(Void aVoid) {
// no op
}
@Override
public void onError(Throwable ex) {
logger.error("Could not complete request", ex);
if (!this.exchange.isResponseStarted() && this.exchange.getStatusCode() < 500) {
this.exchange.setStatusCode(500);
}
this.exchange.endExchange();
}
@Override
public void onComplete() {
logger.debug("Successfully completed request");
this.exchange.endExchange();
}
}
}