问题描述
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.