Hey everyone 
,
I’m trying the new full stack signals with Vaadin 24.6.0.alpha1, but unfortunately I have some problems with LocalDateTime and Jackson. I want to implement a little chat app using the new ListSignal. This is my ChatService:
package com.example.application.services;
import java.time.LocalDateTime;
import com.vaadin.flow.server.auth.AnonymousAllowed;
import com.vaadin.hilla.BrowserCallable;
import com.vaadin.hilla.signals.ListSignal;
@BrowserCallable
@AnonymousAllowed
public class ChatService {
public record ChatMessage(String author, String message, LocalDateTime timestamp) { }
private ListSignal<ChatMessage> messages = new ListSignal<>(ChatMessage.class);
public ListSignal<ChatMessage> messages() {
return messages;
}
}
This is the corresponding ChatView in the frontend:
import { HorizontalLayout, MessageInput, MessageList, TextField } from "@vaadin/react-components"
import { ChatService } from "Frontend/generated/endpoints"
import { useSignal } from '@vaadin/hilla-react-signals';
const chatMessages = ChatService.messages()
const convertToMessageListItem = (author: string, message: string, timestamp: string) => ({
text: message,
time: timestamp,
userName: author,
})
const ChatView = () => {
const username = useSignal('')
return (
<>
<MessageList items={chatMessages.value.map((m) => convertToMessageListItem(m.value.message, m.value.author, m.value.timestamp))} />
<HorizontalLayout theme={'margin'}>
<TextField placeholder={'Your name'} onValueChanged={(e) => username.value = e.detail.value} className={'items-center'} />
<MessageInput onSubmit={(e) => chatMessages.insertLast({ author: username.value, message: e.detail.value, timestamp: new Date().toISOString() })} className={'flex-grow'} />
</HorizontalLayout>
</>
)
}
export default ChatView
Every time I submit a message, I see the following error:
2024-11-02T17:40:22.957+01:00 ERROR 70019 --- [nio-8080-exec-2] com.vaadin.hilla.EndpointInvoker : Endpoint 'SignalsHandler' method 'update' execution failure
java.lang.reflect.InvocationTargetException: null
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
at com.vaadin.hilla.EndpointInvoker.invokeVaadinEndpointMethod(EndpointInvoker.java:454) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.EndpointInvoker.invoke(EndpointInvoker.java:203) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.EndpointController.doServeEndpoint(EndpointController.java:251) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.EndpointController.serveEndpoint(EndpointController.java:199) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:255) ~[spring-web-6.1.13.jar:6.1.13]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:188) ~[spring-web-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:926) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:831) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) ~[spring-webmvc-6.1.13.jar:6.1.13]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914) ~[spring-webmvc-6.1.13.jar:6.1.13]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590) ~[tomcat-embed-core-10.1.30.jar:6.0]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) ~[spring-webmvc-6.1.13.jar:6.1.13]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-10.1.30.jar:6.0]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-10.1.30.jar:10.1.30]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-6.1.13.jar:6.1.13]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.13.jar:6.1.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-6.1.13.jar:6.1.13]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.13.jar:6.1.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-6.1.13.jar:6.1.13]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.13.jar:6.1.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:384) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:905) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) ~[tomcat-embed-core-10.1.30.jar:10.1.30]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
Caused by: java.lang.IllegalArgumentException: Java 8 date/time type `java.time.LocalDateTime` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling
at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.example.application.services.ChatService$ChatMessage["timestamp"])
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4624) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4555) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.vaadin.hilla.signals.core.event.StateEvent.convertValue(StateEvent.java:108) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.signals.core.event.ListStateEvent.<init>(ListStateEvent.java:108) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.signals.ListSignal.processEvent(ListSignal.java:130) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.signals.Signal.submit(Signal.java:100) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.signals.ListSignal.submit(ListSignal.java:113) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at com.vaadin.hilla.signals.handler.SignalsHandler.update(SignalsHandler.java:97) ~[hilla-endpoint-24.6.0.alpha2.jar:na]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
... 53 common frames omitted
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 date/time type `java.time.LocalDateTime` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling
at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.example.application.services.ChatService$ChatMessage["timestamp"])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1887) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.impl.UnsupportedTypeDeserializer.deserialize(UnsupportedTypeDeserializer.java:48) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:545) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeWithErrorWrapping(BeanDeserializer.java:576) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:446) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1493) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:348) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:185) ~[jackson-databind-2.17.2.jar:2.17.2]
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4619) ~[jackson-databind-2.17.2.jar:2.17.2]
... 61 common frames omitted
Although I think that it should not be necessary, I tried to follow the suggestion in the stacktrace and added the following dependency to the pom.xml of my project:
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
In addition, I added an ObjectMapper, that registers Jackson’s JavaTimeModule:
package com.example.application;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
@Configuration
public class AppConfig {
@Bean
public ObjectMapper objectMapper() {
return new ObjectMapper()
.registerModule(new JavaTimeModule());
}
}
But unfortunately the error remains. It seems that the ObjectMapper is not invoked by the SignalsHandler or any of the subsequent methods.
Any ideas or help would be great. Thanks in advance!