org.springframework.web.reactive.function.server.support.ServerResponseResultHandler Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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.web.reactive.function.server.support;
import java.util.Collections;
import java.util.List;
import reactor.core.publisher.Mono;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.Ordered;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.web.reactive.HandlerResult;
import org.springframework.web.reactive.HandlerResultHandler;
import org.springframework.web.reactive.function.server.ServerResponse;
import org.springframework.web.reactive.result.view.ViewResolver;
import org.springframework.web.server.ServerWebExchange;
/**
* {@code HandlerResultHandler} implementation that supports {@link ServerResponse ServerResponses}.
*
* @author Arjen Poutsma
* @since 5.0
*/
public class ServerResponseResultHandler implements HandlerResultHandler, InitializingBean, Ordered {
private List> messageWriters = Collections.emptyList();
private List viewResolvers = Collections.emptyList();
private int order = 0;
/**
* Configure HTTP message writers to serialize the request body with.
* By default this is set to {@link ServerCodecConfigurer}'s default writers.
*/
public void setMessageWriters(List> configurer) {
this.messageWriters = configurer;
}
public void setViewResolvers(List viewResolvers) {
this.viewResolvers = viewResolvers;
}
/**
* Set the order for this result handler relative to others.
* By default set to 0. It is generally safe to place it early in the
* order as it looks for a concrete return type.
*/
public void setOrder(int order) {
this.order = order;
}
@Override
public int getOrder() {
return this.order;
}
@Override
public void afterPropertiesSet() throws Exception {
if (CollectionUtils.isEmpty(this.messageWriters)) {
throw new IllegalArgumentException("Property 'messageWriters' is required");
}
}
@Override
public boolean supports(HandlerResult result) {
return (result.getReturnValue() instanceof ServerResponse);
}
@Override
public Mono handleResult(ServerWebExchange exchange, HandlerResult result) {
ServerResponse response = (ServerResponse) result.getReturnValue();
Assert.state(response != null, "No ServerResponse");
return response.writeTo(exchange, new ServerResponse.Context() {
@Override
public List> messageWriters() {
return messageWriters;
}
@Override
public List viewResolvers() {
return viewResolvers;
}
});
}
}