Error in injecting commandgateway

Axon Framework
, ,
1

I have this error that has made me not advance in the CQRS implementation in spring boot.

Err: Parameter 0 of constructor in com.lawrence.digitalbanking.command.controller.AccountCommandRestAPI required a bean of type ‘org.axonframework.commandhandling.gateway.CommandGateway’ that could not be found.

Here is my class code

@RestController
@RequestMapping("/commands/accounts")
@Slf4j
@AllArgsConstructor
public class AccountCommandRestAPI {
    private CommandGateway commandGateway;
    
    @PostMapping("/create")
    public CompletableFuture<String> newAccount(@RequestBody CreateAccountRequestDTO request) {
        log.info("CreateAccountRequestDTO =>"+request.getInitialBalance().toString());
        CompletableFuture<String> resp =  commandGateway.send(new createAccountCommand(
                UUID.randomUUID().toString(),
                request.getInitialBalance(),
                request.getCurrency()
                ));
        return resp;
    }
}

This is my pom.xml dependency

<dependency>
            <groupId>org.axonframework</groupId>
            <artifactId>axon-spring-boot-starter</artifactId>
            <version>4.6.2</version>
            <exclusions>
                <exclusion>
                    <groupId>org.axonframework</groupId>
                    <artifactId>axon-server-connector</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

I don’t really know what I am missing. I have tried several times. My CommandGateway is not getting injected.

Please thanks in Advance.

I was expecting it to run but it throws that error despite the dependency being included in the pom.xml

2

By excluding the axon-server-connector it seems like you don’t want to use Axon Server.

You likely want to use a distributed command gateway, and thus distributed command bus through. For that you need one of two extensions, and set a property to disable the auto wiring for Axon Server. You can get the details from the reference guide.

Please let is know if that helped to get it working.

3

Thank you for answering. I just removed the exclusion part and it stills throw the same error

4

I just started the axon server too

java -jar AxonServer.jar
5

@Gerard please looking forward to resolving this problem once and for all. It has really hindered my progress.

6

My full 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>3.0.0</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.lawrence</groupId>
	<artifactId>digital-banking</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>digital-banking</name>
	<description>digital banking</description>
	<properties>
		<java.version>17</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</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.axonframework</groupId>
			<artifactId>axon-spring-boot-starter</artifactId>
			<version>4.6.2</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<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>
	</build>

</project>
7

then I injected it here

import java.util.UUID;
import java.util.concurrent.CompletableFuture;

import org.axonframework.commandhandling.gateway.CommandGateway;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.lawrence.digitalbanking.command.dto.CreateAccountRequestDTO;
import com.lawrence.digitalbanking.coreapi.commands.createAccountCommand;

import lombok.extern.slf4j.Slf4j;

@RestController
@RequestMapping("/commands/accounts")
@Slf4j
public class AccountCommandRestAPI {
	private CommandGateway commandGateway;
	public AccountCommandRestAPI(CommandGateway commandGateway) {
		this.commandGateway=commandGateway;
	}
	@PostMapping("/create")
	public CompletableFuture<String> newAccount(@RequestBody CreateAccountRequestDTO request) {
		log.info("CreateAccountRequestDTO =>"+request.getInitialBalance().toString());
		CompletableFuture<String> resp =
				commandGateway.send(new createAccountCommand(UUID.randomUUID().toString(),
						request.getInitialBalance(),
						request.getCurrency()));
		return resp;
	}
	
}
8

Axon Framework is not Spring Boot 3 compatible yet. It should work by changing to 2.7.6. We expect the next release, 4.7.0., that is expected to be released in January to have Spring Boot 3 support.

9

thank you. Now I can continue learning axon.

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