org.springframework.web.reactive.function.server.HandlerStrategies 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.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.web.reactive.result.view.ViewResolver;
import org.springframework.web.server.WebExceptionHandler;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.i18n.LocaleContextResolver;
/**
* Defines the strategies to be used for processing {@link HandlerFunction}s. An instance of
* this class is immutable; instances are typically created through the mutable {@link Builder}:
* either through {@link #builder()} to set up default strategies, or {@link #empty()} to start from
* scratch.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @author Sebastien Deleuze
* @since 5.0
* @see RouterFunctions#toHttpHandler(RouterFunction, HandlerStrategies)
*/
public interface HandlerStrategies {
/**
* Return the {@link HttpMessageReader}s to be used for request body conversion.
* @return the message readers
*/
List> messageReaders();
/**
* Return the {@link HttpMessageWriter}s to be used for response body conversion.
* @return the message writers
*/
List> messageWriters();
/**
* Return the {@link ViewResolver}s to be used for view name resolution.
* @return the view resolvers
*/
List viewResolvers();
/**
* Return the {@link WebFilter}s to be used for filtering the request and response.
* @return the web filters
*/
List webFilters();
/**
* Return the {@link WebExceptionHandler}s to be used for handling exceptions.
* @return the exception handlers
*/
List exceptionHandlers();
/**
* Return the {@link LocaleContextResolver} to be used for resolving locale context.
* @return the locale context resolver
*/
LocaleContextResolver localeContextResolver();
// Static methods
/**
* Return a new {@code HandlerStrategies} with default initialization.
* @return the new {@code HandlerStrategies}
*/
static HandlerStrategies withDefaults() {
return builder().build();
}
/**
* Return a mutable builder for a {@code HandlerStrategies} with default initialization.
* @return the builder
*/
static Builder builder() {
DefaultHandlerStrategiesBuilder builder = new DefaultHandlerStrategiesBuilder();
builder.defaultConfiguration();
return builder;
}
/**
* Return a mutable, empty builder for a {@code HandlerStrategies}.
* @return the builder
*/
static Builder empty() {
return new DefaultHandlerStrategiesBuilder();
}
/**
* A mutable builder for a {@link HandlerStrategies}.
*/
interface Builder {
/**
* Customize the list of server-side HTTP message readers and writers.
* @param consumer the consumer to customize the codecs
* @return this builder
*/
Builder codecs(Consumer consumer);
/**
* Add the given view resolver to this builder.
* @param viewResolver the view resolver to add
* @return this builder
*/
Builder viewResolver(ViewResolver viewResolver);
/**
* Add the given web filter to this builder.
* @param filter the filter to add
* @return this builder
*/
Builder webFilter(WebFilter filter);
/**
* Add the given exception handler to this builder.
* @param exceptionHandler the exception handler to add
* @return this builder
*/
Builder exceptionHandler(WebExceptionHandler exceptionHandler);
/**
* Add the given locale context resolver to this builder.
* @param localeContextResolver the locale context resolver to add
* @return this builder
*/
Builder localeContextResolver(LocaleContextResolver localeContextResolver);
/**
* Builds the {@link HandlerStrategies}.
* @return the built strategies
*/
HandlerStrategies build();
}
}