骆驼示例找不到 org.apache.camel.impl.DefaultComponent

我创建了一个小的 Apache Camel 示例，但它找不到类 org.apache.camel.impl.DefaultComponent.

老实说，这对我来说似乎是一个错误，或者与 core-zeromq 不兼容.

I've created a small Apache Camel example, but it can't find the class org.apache.camel.impl.DefaultComponent. Here the full error log.

I've looked the class up on search.maven.org, which says it should be contained in org.apache.camel:camel-core. Adding it does not solve my problem. What's wrong in this example?

---

This is the application

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(Application.class);
        app.setWebApplicationType(WebApplicationType.NONE);
        app.run(args);
    }
}

and here the route.

@Component
public class ZmqRoute extends RouteBuilder {

    @Override
    public void configure() throws Exception {
        //from("stream:in").to("stream:out");

        String host = "zmq.devnet.iota.org";
        from("zeromq:tcp://" + host + ":5556?socketType=SUBSCRIBE&topics=tx")
                .to("stream:out")
                .log("${body}");
    }
}

Lastly, here the build.gradle.kts

plugins {
    java
    application
    id("org.springframework.boot") version "2.1.2.RELEASE"
    id("io.spring.dependency-management") version "1.0.6.RELEASE"
}

repositories {
    jcenter()
}

application {
    mainClassName = "org.example.camel.Application"
}

java {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}

tasks.withType<JavaCompile>().configureEach {
    options.compilerArgs.addAll(arrayOf("-Xlint:all"))
    options.encoding = "UTF-8"
}

dependencies {
    val camelVersion = "3.0.0-M1"

    implementation("org.springframework.boot:spring-boot-starter-web")

    implementation("org.apache.camel:camel-spring-boot-starter:$camelVersion")

    implementation("org.apache.camel:camel-stream-starter:$camelVersion")

    //implementation("org.apache.camel:camel-core:$camelVersion")

    implementation("org.apache-extras.camel-extra:camel-zeromq:2.22.0") {
        exclude(module = "zeromq-scala-binding_2.10")
    }

    implementation("org.zeromq:jeromq:0.5.0")

    testImplementation("junit:junit:4.12")
}

解决方案

So basically, after looking at Camel Core 3.0.0.M1, I discovered the .class file for

org.apache.camel.impl.DefaultComponent

doesn't exists anymore!

camel-core-3.0.0-M1.jarorgapachecamelimpl 

Honestly it seems like a bug to me, or incompatibility with core-zeromq.