/*
* Copyright 2002-2017 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.result.method;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.reactive.BindingContext;
import org.springframework.web.reactive.HandlerResult;
import org.springframework.web.server.ServerWebExchange;
/**
* Extension of {@link HandlerMethod} that invokes the underlying method via
* {@link InvocableHandlerMethod} but uses sync argument resolvers only and
* thus can return directly a {@link HandlerResult} with no async wrappers.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public class SyncInvocableHandlerMethod extends HandlerMethod {
private final InvocableHandlerMethod delegate;
public SyncInvocableHandlerMethod(HandlerMethod handlerMethod) {
super(handlerMethod);
this.delegate = new InvocableHandlerMethod(handlerMethod);
}
public SyncInvocableHandlerMethod(Object bean, Method method) {
super(bean, method);
this.delegate = new InvocableHandlerMethod(bean, method);
}
/**
* Configure the argument resolvers to use to use for resolving method
* argument values against a {@code ServerWebExchange}.
*/
public void setArgumentResolvers(List<SyncHandlerMethodArgumentResolver> resolvers) {
this.delegate.setArgumentResolvers(new ArrayList<>(resolvers));
}
/**
* Return the configured argument resolvers.
*/
public List<SyncHandlerMethodArgumentResolver> getResolvers() {
return this.delegate.getResolvers().stream()
.map(resolver -> (SyncHandlerMethodArgumentResolver) resolver)
.collect(Collectors.toList());
}
/**
* Set the ParameterNameDiscoverer for resolving parameter names when needed
* (e.g. default request attribute name).
* <p>Default is a {@link DefaultParameterNameDiscoverer}.
*/
public void setParameterNameDiscoverer(ParameterNameDiscoverer nameDiscoverer) {
this.delegate.setParameterNameDiscoverer(nameDiscoverer);
}
/**
* Return the configured parameter name discoverer.
*/
public ParameterNameDiscoverer getParameterNameDiscoverer() {
return this.delegate.getParameterNameDiscoverer();
}
/**
* Invoke the method for the given exchange.
* @param exchange the current exchange
* @param bindingContext the binding context to use
* @param providedArgs optional list of argument values to match by type
* @return Mono with a {@link HandlerResult}.
*/
public HandlerResult invokeForHandlerResult(ServerWebExchange exchange,
BindingContext bindingContext, Object... providedArgs) {
// This will not block with only sync resolvers allowed
return this.delegate.invoke(exchange, bindingContext, providedArgs).block();
}
}