/
IntegrationRSocketMessageHandler.java
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/
IntegrationRSocketMessageHandler.java
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/*
* Copyright 2019 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.integration.rsocket;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.core.MethodParameter;
import org.springframework.messaging.Message;
import org.springframework.messaging.ReactiveMessageHandler;
import org.springframework.messaging.handler.CompositeMessageCondition;
import org.springframework.messaging.handler.DestinationPatternsMessageCondition;
import org.springframework.messaging.handler.invocation.reactive.HandlerMethodArgumentResolver;
import org.springframework.messaging.handler.invocation.reactive.SyncHandlerMethodArgumentResolver;
import org.springframework.messaging.rsocket.annotation.support.RSocketFrameTypeMessageCondition;
import org.springframework.messaging.rsocket.annotation.support.RSocketMessageHandler;
import org.springframework.util.ReflectionUtils;
import io.rsocket.frame.FrameType;
/**
* The {@link RSocketMessageHandler} extension for Spring Integration needs.
* <p>
* This class adds an {@link IntegrationRSocketEndpoint} beans detection and registration functionality.
*
* @author Artem Bilan
*
* @since 5.2
*
* @see RSocketMessageHandler
*/
class IntegrationRSocketMessageHandler extends RSocketMessageHandler {
private static final Method HANDLE_MESSAGE_METHOD =
ReflectionUtils.findMethod(ReactiveMessageHandler.class, "handleMessage", Message.class);
protected final boolean messageMappingCompatible; // NOSONAR final
IntegrationRSocketMessageHandler() {
this(false);
}
IntegrationRSocketMessageHandler(boolean messageMappingCompatible) {
this.messageMappingCompatible = messageMappingCompatible;
if (!this.messageMappingCompatible) {
setHandlerPredicate((clazz) -> false);
}
}
public boolean detectEndpoints() {
ApplicationContext applicationContext = getApplicationContext();
if (applicationContext != null && getHandlerMethods().isEmpty()) {
return applicationContext
.getBeansOfType(IntegrationRSocketEndpoint.class)
.values()
.stream()
.peek(this::addEndpoint)
.count() > 0;
}
else {
return false;
}
}
public void addEndpoint(IntegrationRSocketEndpoint endpoint) {
registerHandlerMethod(endpoint, HANDLE_MESSAGE_METHOD,
new CompositeMessageCondition(
new RSocketFrameTypeMessageCondition(
FrameType.REQUEST_FNF,
FrameType.REQUEST_RESPONSE,
FrameType.REQUEST_STREAM,
FrameType.REQUEST_CHANNEL),
new DestinationPatternsMessageCondition(endpoint.getPath(), getRouteMatcher()))); // NOSONAR
}
@Override
protected List<? extends HandlerMethodArgumentResolver> initArgumentResolvers() {
if (this.messageMappingCompatible) {
// Add argument resolver before parent initializes argument resolution
getArgumentResolverConfigurer().addCustomResolver(new MessageHandlerMethodArgumentResolver());
return super.initArgumentResolvers();
}
else {
return Collections.singletonList(new MessageHandlerMethodArgumentResolver());
}
}
protected static final class MessageHandlerMethodArgumentResolver implements SyncHandlerMethodArgumentResolver {
@Override
public boolean supportsParameter(MethodParameter parameter) {
return Message.class.equals(parameter.getParameterType());
}
@Override
public Object resolveArgumentValue(MethodParameter parameter, Message<?> message) {
return message;
}
}
}