Hi everyone I wrote a rest api using Spring Boot Webflux
LabelController
@RestController
@RequestMapping("/api/label")
@RequiredArgsConstructor
public class LabelController {
private final LabelService labelService;
@GetMapping
public Flux<LabelEntity> getAllLabels(){
return labelService.getAll();
}
LabelService
@Service
@RequiredArgsConstructor
public class LabelService {
private final LabelRepository labelRepository;
public Flux<LabelEntity> getAll() {
return labelRepository.findAll();
}
LabelRespository
@Repository
public interface LabelRepository extends ReactiveCrudRepository<LabelEntity,Integer> {
}
Application.yml Since I use liquebase in the application yml part, I added jdbc and r2dbc.
spring:
liquibase:
enabled: true
url: jdbc:postgresql://localhost:5432/liquebase
user: postgres
password: 12345
change-log: classpath:db/liquibase/db.changelog-master-main.yml
datasource:
driver-class-name: org.postgresql.Driver
r2dbc:
url: r2dbc:postgresql://localhost:5432/liquebase
username: postgres
password: 12345
pool:
initial-size: 100
max-size: 500
max-idle-time: 30m
validation-query: SELECT 1
server:
port: 8085
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-
instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.WebFluxTestCodes</groupId>
<artifactId>WebFluxTestCodes</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>WebFluxTestCodes</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-r2dbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
<version>3.10.3</version>
</dependency>
<dependency>
<groupId>io.r2dbc</groupId>
<artifactId>r2dbc-postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-maven-plugin</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>javax.persistence-api</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
My RestApi Main Class
@SpringBootApplication
@EnableR2dbcRepositories
@ComponentScan("com.WebFluxTestCodes.WebFluxTestCodes.business.*")
public class WebFluxTestCodesApplication {
public static void main(String[] args) {
SpringApplication.run(WebFluxTestCodesApplication.class, args);
}
}
Log my project not problem in project is started
2021-03-15 20:38:12.375 INFO 8692 --- [ restartedMain] c.W.W.WebFluxTestCodesApplication :
Starting WebFluxTestCodesApplication using Java 15.0.1 on WIN-3QMQSJHKUBK with PID 8692
(C:\Users\user\Desktop\TestWebService\WebFluxTestCodes\target\classes started by user in
C:\Users\user\Desktop\TestWebService\WebFluxTestCodes)
2021-03-15 20:38:12.375 INFO 8692 --- [ restartedMain] c.W.W.WebFluxTestCodesApplication :
No active profile set, falling back to default profiles: default
2021-03-15 20:38:13.266 INFO 8692 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls :
The Class-Path manifest attribute in C:\Users\user\.m2\repository\org\liquibase\liquibase-
core\3.10.3\liquibase-core-3.10.3.jar referenced one or more files that do not exist:
file:/C:/Users/user/.m2/repository/org/liquibase/liquibase-core/3.10.3/commons-cli-
1.4.jar,file:/C:/Users/user/.m2/repository/org/liquibase/liquibase-core/3.10.3/snakeyaml-
1.24.jar,file:/C:/Users/user/.m2/repository/org/liquibase/liquibase-core/3.10.3/slf4j-api-
1.7.28.jar,file:/C:/Users/user/.m2/repository/org/liquibase/liquibase-core/3.10.3/logback-classic-
1.2.3.jar,file:/C:/Users/user/.m2/repository/org/liquibase/liquibase-core/3.10.3/logback-core-
1.2.3.jar
2021-03-15 20:38:13.266 INFO 8692 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor :
Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-03-15 20:38:13.266 INFO 8692 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor :
For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-03-15 20:38:16.782 INFO 8692 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate :
Multiple Spring Data modules found, entering strict repository configuration mode!
2021-03-15 20:38:16.782 INFO 8692 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate
: Bootstrapping Spring Data R2DBC repositories in DEFAULT mode.
2021-03-15 20:38:17.264 INFO 8692 --- [ restartedMain] .RepositoryConfigurationExtensionSupport
: Spring Data R2DBC - Could not safely identify store assignment for repository candidate
interface com.WebFluxTestCodes.WebFluxTestCodes.repository.LabelRepository. If you want this
repository to be a R2DBC repository, consider annotating your entities with one of these
annotations: org.springframework.data.relational.core.mapping.Table (preferred), or consider
extending one of the following types with your repository:
org.springframework.data.r2dbc.repository.R2dbcRepository.
2021-03-15 20:38:17.276 INFO 8692 --- [ restartedMain]
.RepositoryConfigurationExtensionSupport : Spring Data R2DBC - Could not safely identify store
assignment for repository candidate interface
com.WebFluxTestCodes.WebFluxTestCodes.repository.ProjectRepository. If you want this repository
to be a R2DBC repository, consider annotating your entities with one of these annotations:
org.springframework.data.relational.core.mapping.Table (preferred), or consider extending one of
the following types with your repository:
org.springframework.data.r2dbc.repository.R2dbcRepository.
2021-03-15 20:38:17.280 INFO 8692 --- [ restartedMain] .RepositoryConfigurationExtensionSupport
: Spring Data R2DBC - Could not safely identify store assignment for repository candidate
interface com.WebFluxTestCodes.WebFluxTestCodes.repository.TasksRepository. If you want this
repository to be a R2DBC repository, consider annotating your entities with one of these
annotations: org.springframework.data.relational.core.mapping.Table (preferred), or consider
extending one of the following types with your repository:
org.springframework.data.r2dbc.repository.R2dbcRepository.
2021-03-15 20:38:17.284 INFO 8692 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate
: Finished Spring Data repository scanning in 452 ms. Found 0 R2DBC repository interfaces.
2021-03-15 20:38:18.522 INFO 8692 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate
: Multiple Spring Data modules found, entering strict repository configuration mode!
2021-03-15 20:38:18.624 INFO 8692 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate
: Bootstrapping Spring Data R2DBC repositories in DEFAULT mode.
2021-03-15 20:38:18.714 INFO 8692 --- [ restartedMain] .RepositoryConfigurationExtensionSupport
: Spring Data R2DBC - Could not safely identify store assignment for repository candidate
interface com.WebFluxTestCodes.WebFluxTestCodes.repository.LabelRepository. If you want this
repository to be a R2DBC repository, consider annotating your entities with one of these
annotations: org.springframework.data.relational.core.mapping.Table (preferred), or consider
extending one of the following types with your repository:
org.springframework.data.r2dbc.repository.R2dbcRepository.
2021-03-15 20:38:18.718 INFO 8692 --- [ restartedMain]
.RepositoryConfigurationExtensionSupport : Spring Data R2DBC - Could not safely identify store
assignment for repository candidate interface
com.WebFluxTestCodes.WebFluxTestCodes.repository.ProjectRepository. If you want this repository
to be a R2DBC repository, consider annotating your entities with one of these annotations:
org.springframework.data.relational.core.mapping.Table (preferred), or consider extending one
of the following types with your repository:
org.springframework.data.r2dbc.repository.R2dbcRepository.
2021-03-15 20:38:18.723 INFO 8692 --- [ restartedMain] .RepositoryConfigurationExtensionSupport
: Spring Data R2DBC - Could not safely identify store assignment for repository candidate
interface com.WebFluxTestCodes.WebFluxTestCodes.repository.TasksRepository. If you want this
repository to be a R2DBC repository, consider annotating your entities with one of these
annotations: org.springframework.data.relational.core.mapping.Table (preferred), or consider
extending one of the following types with your repository:
org.springframework.data.r2dbc.repository.R2dbcRepository.
2021-03-15 20:38:18.724 INFO 8692 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate
: Finished Spring Data repository scanning in 97 ms. Found 0 R2DBC repository interfaces.
2021-03-15 20:38:26.847 INFO 8692 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource
: HikariPool-1 - Starting...
2021-03-15 20:38:28.550 INFO 8692 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource
: HikariPool-1 - Start completed.
2021-03-15 20:38:42.546 INFO 8692 --- [ restartedMain] l.lockservice.StandardLockService
: Successfully acquired change log lock
2021-03-15 20:38:44.908 INFO 8692 --- [ restartedMain] l.c.StandardChangeLogHistoryService
: Reading from public.databasechangelog
2021-03-15 20:38:45.635 INFO 8692 --- [ restartedMain] l.lockservice.StandardLockService :
Successfully released change log lock
2021-03-15 20:38:45.651 INFO 8692 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource :
HikariPool-1 - Shutdown initiated...
2021-03-15 20:38:45.698 INFO 8692 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource
: HikariPool-1 - Shutdown completed.
2021-03-15 20:38:46.773 INFO 8692 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer
: LiveReload server is running on port 35729
2021-03-15 20:38:47.884 INFO 8692 --- [ restartedMain] o.s.b.web.embedded.netty.NettyWebServer :
Netty started on port 8085
2021-03-15 20:38:47.915 INFO 8692 --- [ restartedMain] c.W.W.WebFluxTestCodesApplication
: Started WebFluxTestCodesApplication in 39.523 seconds (JVM running for 45.043)
However, when I send a request using the browser, no request comes to the controllers and the following error occurs in the browser.
This application has no configured error view, so you are seeing this as a fallback.
Mon Mar 15 20:38:51 AZT 2021
[005bd2a6-1] There was an unexpected error (type=Not Found, status=404).
org.springframework.web.server.ResponseStatusException: 404 NOT_FOUND
at
org.springframework.web.reactive.resource.ResourceWebHandler
.lambda$handle$1(ResourceWebHandler.java:378)
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ HTTP GET "/all" [ExceptionHandlingWebHandler]
Stack trace:
at
org.springframework.web.reactive.resource
.ResourceWebHandler.lambda$handle$1(ResourceWebHandler.java:378)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44)
at reactor.core.publisher.Mono.subscribe(Mono.java:4046)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber
.onComplete(FluxSwitchIfEmpty.java:81)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:181)
at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:366)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.Mono.subscribe(Mono.java:4046)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:173)
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber
.onNext(FluxSwitchIfEmpty.java:73)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:281)
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:860)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber
.onSubscribe(FluxMapFuseable.java:96)
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54)
at reactor.core.publisher.Mono.subscribe(Mono.java:4046)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:448)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.Mono.subscribe(Mono.java:4046)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:173)
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.netty.http.server.HttpServer$HttpServerHandle.onStateChange(HttpServer.java:860)
at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:638)
at reactor.netty.transport.ServerTransport$ChildObserver.onStateChange(ServerTransport.java:478)
at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:525)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:209)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:832)
Request Controller Project Not Working What is the problem ? it is very important to me Please Help me
My project github link --https://github.com/Z-Farrukzada/Webflux-Reactive-Programming-example
