org.springframework.web.reactive.function.server.DefaultHandlerStrategiesBuilder 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;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Consumer;
import org.springframework.http.codec.HttpMessageReader;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.util.Assert;
import org.springframework.web.reactive.handler.WebFluxResponseStatusExceptionHandler;
import org.springframework.web.reactive.result.view.ViewResolver;
import org.springframework.web.server.WebExceptionHandler;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.i18n.AcceptHeaderLocaleContextResolver;
import org.springframework.web.server.i18n.LocaleContextResolver;
/**
* Default implementation of {@link HandlerStrategies.Builder}.
*
* @author Arjen Poutsma
* @since 5.0
*/
class DefaultHandlerStrategiesBuilder implements HandlerStrategies.Builder {
private final ServerCodecConfigurer codecConfigurer = ServerCodecConfigurer.create();
private final List viewResolvers = new ArrayList<>();
private final List webFilters = new ArrayList<>();
private final List exceptionHandlers = new ArrayList<>();
private LocaleContextResolver localeContextResolver = new AcceptHeaderLocaleContextResolver();
public DefaultHandlerStrategiesBuilder() {
this.codecConfigurer.registerDefaults(false);
}
public void defaultConfiguration() {
this.codecConfigurer.registerDefaults(true);
this.exceptionHandlers.add(new WebFluxResponseStatusExceptionHandler());
this.localeContextResolver = new AcceptHeaderLocaleContextResolver();
}
@Override
public HandlerStrategies.Builder codecs(Consumer consumer) {
consumer.accept(this.codecConfigurer);
return this;
}
@Override
public HandlerStrategies.Builder viewResolver(ViewResolver viewResolver) {
Assert.notNull(viewResolver, "ViewResolver must not be null");
this.viewResolvers.add(viewResolver);
return this;
}
@Override
public HandlerStrategies.Builder webFilter(WebFilter filter) {
Assert.notNull(filter, "WebFilter must not be null");
this.webFilters.add(filter);
return this;
}
@Override
public HandlerStrategies.Builder exceptionHandler(WebExceptionHandler exceptionHandler) {
Assert.notNull(exceptionHandler, "WebExceptionHandler must not be null");
this.exceptionHandlers.add(exceptionHandler);
return this;
}
@Override
public HandlerStrategies.Builder localeContextResolver(LocaleContextResolver localeContextResolver) {
Assert.notNull(localeContextResolver, "LocaleContextResolver must not be null");
this.localeContextResolver = localeContextResolver;
return this;
}
@Override
public HandlerStrategies build() {
return new DefaultHandlerStrategies(this.codecConfigurer.getReaders(),
this.codecConfigurer.getWriters(), this.viewResolvers, this.webFilters,
this.exceptionHandlers, this.localeContextResolver);
}
private static class DefaultHandlerStrategies implements HandlerStrategies {
private final List> messageReaders;
private final List> messageWriters;
private final List viewResolvers;
private final List webFilters;
private final List exceptionHandlers;
private final LocaleContextResolver localeContextResolver;
public DefaultHandlerStrategies(
List> messageReaders,
List> messageWriters,
List viewResolvers,
List webFilters,
List exceptionHandlers,
LocaleContextResolver localeContextResolver) {
this.messageReaders = unmodifiableCopy(messageReaders);
this.messageWriters = unmodifiableCopy(messageWriters);
this.viewResolvers = unmodifiableCopy(viewResolvers);
this.webFilters = unmodifiableCopy(webFilters);
this.exceptionHandlers = unmodifiableCopy(exceptionHandlers);
this.localeContextResolver = localeContextResolver;
}
private static List unmodifiableCopy(List list) {
return Collections.unmodifiableList(new ArrayList<>(list));
}
@Override
public List> messageReaders() {
return this.messageReaders;
}
@Override
public List> messageWriters() {
return this.messageWriters;
}
@Override
public List viewResolvers() {
return this.viewResolvers;
}
@Override
public List webFilters() {
return this.webFilters;
}
@Override
public List exceptionHandlers() {
return this.exceptionHandlers;
}
@Override
public LocaleContextResolver localeContextResolver() {
return this.localeContextResolver;
}
}
}