org.springframework.boot.actuate.web.mappings.reactive.DispatcherHandlersMappingDescriptionProvider Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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
*
* https://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.boot.actuate.web.mappings.reactive;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import reactor.core.publisher.Mono;
import org.springframework.boot.actuate.web.mappings.HandlerMethodDescription;
import org.springframework.boot.actuate.web.mappings.MappingDescriptionProvider;
import org.springframework.context.ApplicationContext;
import org.springframework.core.io.Resource;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.reactive.DispatcherHandler;
import org.springframework.web.reactive.HandlerMapping;
import org.springframework.web.reactive.function.server.HandlerFunction;
import org.springframework.web.reactive.function.server.RequestPredicate;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.RouterFunctions.Visitor;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.support.RouterFunctionMapping;
import org.springframework.web.reactive.handler.AbstractUrlHandlerMapping;
import org.springframework.web.reactive.result.method.RequestMappingInfo;
import org.springframework.web.reactive.result.method.RequestMappingInfoHandlerMapping;
import org.springframework.web.util.pattern.PathPattern;
/**
* A {@link MappingDescriptionProvider} that introspects the {@link HandlerMapping
* HandlerMappings} that are known to a {@link DispatcherHandler}.
*
* @author Andy Wilkinson
* @since 2.0.0
*/
public class DispatcherHandlersMappingDescriptionProvider
implements MappingDescriptionProvider {
private static final List> descriptionProviders = Arrays
.asList(new RequestMappingInfoHandlerMappingDescriptionProvider(),
new UrlHandlerMappingDescriptionProvider(),
new RouterFunctionMappingDescriptionProvider());
@Override
public String getMappingName() {
return "dispatcherHandlers";
}
@Override
public Map> describeMappings(
ApplicationContext context) {
Map> mappings = new HashMap<>();
context.getBeansOfType(DispatcherHandler.class).forEach(
(name, handler) -> mappings.put(name, describeMappings(handler)));
return mappings;
}
private List describeMappings(
DispatcherHandler dispatcherHandler) {
return dispatcherHandler.getHandlerMappings().stream().flatMap(this::describe)
.collect(Collectors.toList());
}
@SuppressWarnings("unchecked")
private Stream describe(
T handlerMapping) {
for (HandlerMappingDescriptionProvider descriptionProvider : descriptionProviders) {
if (descriptionProvider.getMappingClass().isInstance(handlerMapping)) {
return ((HandlerMappingDescriptionProvider) descriptionProvider)
.describe(handlerMapping).stream();
}
}
return Stream.empty();
}
private interface HandlerMappingDescriptionProvider {
Class getMappingClass();
List describe(T handlerMapping);
}
private static final class RequestMappingInfoHandlerMappingDescriptionProvider
implements
HandlerMappingDescriptionProvider {
@Override
public Class getMappingClass() {
return RequestMappingInfoHandlerMapping.class;
}
@Override
public List describe(
RequestMappingInfoHandlerMapping handlerMapping) {
Map handlerMethods = handlerMapping
.getHandlerMethods();
return handlerMethods.entrySet().stream().map(this::describe)
.collect(Collectors.toList());
}
private DispatcherHandlerMappingDescription describe(
Entry mapping) {
DispatcherHandlerMappingDetails handlerMapping = new DispatcherHandlerMappingDetails();
handlerMapping
.setHandlerMethod(new HandlerMethodDescription(mapping.getValue()));
handlerMapping.setRequestMappingConditions(
new RequestMappingConditionsDescription(mapping.getKey()));
return new DispatcherHandlerMappingDescription(mapping.getKey().toString(),
mapping.getValue().toString(), handlerMapping);
}
}
private static final class UrlHandlerMappingDescriptionProvider
implements HandlerMappingDescriptionProvider {
@Override
public Class getMappingClass() {
return AbstractUrlHandlerMapping.class;
}
@Override
public List describe(
AbstractUrlHandlerMapping handlerMapping) {
return handlerMapping.getHandlerMap().entrySet().stream().map(this::describe)
.collect(Collectors.toList());
}
private DispatcherHandlerMappingDescription describe(
Entry mapping) {
return new DispatcherHandlerMappingDescription(
mapping.getKey().getPatternString(), mapping.getValue().toString(),
null);
}
}
private static final class RouterFunctionMappingDescriptionProvider
implements HandlerMappingDescriptionProvider {
@Override
public Class getMappingClass() {
return RouterFunctionMapping.class;
}
@Override
public List describe(
RouterFunctionMapping handlerMapping) {
MappingDescriptionVisitor visitor = new MappingDescriptionVisitor();
RouterFunction routerFunction = handlerMapping.getRouterFunction();
if (routerFunction != null) {
routerFunction.accept(visitor);
}
return visitor.descriptions;
}
}
private static final class MappingDescriptionVisitor implements Visitor {
private final List descriptions = new ArrayList<>();
@Override
public void startNested(RequestPredicate predicate) {
}
@Override
public void endNested(RequestPredicate predicate) {
}
@Override
public void route(RequestPredicate predicate,
HandlerFunction handlerFunction) {
DispatcherHandlerMappingDetails details = new DispatcherHandlerMappingDetails();
details.setHandlerFunction(new HandlerFunctionDescription(handlerFunction));
this.descriptions.add(new DispatcherHandlerMappingDescription(
predicate.toString(), handlerFunction.toString(), details));
}
@Override
public void resources(Function> lookupFunction) {
}
@Override
public void unknown(RouterFunction routerFunction) {
}
}
}