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我正在尝试在 Spring Cloud Data Flow 中配置 DLQ。这是流定义以及我如何部署它

  stream create --definition ":someTestTopic > custom-transform
     --spring.cloud.stream.bindings.input.consumer.headerMode=raw | log --spring.cloud.stream.bindings.input.consumer.headerMode=raw" --name ticktran


    stream deploy ticktran --properties
  "apps.log.spring.cloud.stream.bindings.input.consumer.headerMode=raw,apps.custom-transform.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.custom-transform.spring.cloud.stream.bindings.output.destination=test-tran,app.log.spring.cloud.stream.bindings.input.destination=test-tran,app.custom-transform.spring.cloud.stream.kafka.bindings.test-tran.consumer.enableDlq=true"

在自定义转换 - 处理器代码中,我已经提到

if(out.contains("ERROR")) {
            throw new RuntimeException("Error ");
        }

这意味着如果消息包含 ERROR 则 RunTimeException 并且我想在 DLQ 中捕获这些消息。但似乎当我运行代码时,我没有得到任何名称为 test-tran 的 Kafka DL 队列。

我是否需要设置更多属性以启用 DLQ,或者我需要更改代码中的某些内容以正确使用 DLQ。

自定义转换代码

转换服务应用程序.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.hateoas.config.EnableEntityLinks;

@SpringBootApplication
@EnableEntityLinks
public class TransformationServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(TransformationServiceApplication.class, args);
    }
}

TransformationMessageEndPoint.java

@EnableBinding(Processor.class)
@MessageEndpoint
public class TransformationMessageEndpoint {

    private static final String NS = "http://openrisk.com/ingestion/";

    AtomicInteger index = new AtomicInteger(1);
    @ServiceActivator(inputChannel = Processor.INPUT, outputChannel = Processor.OUTPUT)
    public Object process(Message<?> message) {
        String out =  new String((byte[])message.getPayload());

        System.out.println("*****" + out);

        if(out.contains("ERROR")) {
            throw new RuntimeException("Error ");
        }

        return message;

    }
}

pom.xml

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.6.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-dataflow-server-local</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-stream-kafka</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-stream-binder-kafka -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-stream-binder-kafka</artifactId>
            <version>1.0.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-stream-test-support</artifactId>
            <version>1.0.0.BUILD-SNAPSHOT</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud.stream.module</groupId>
            <artifactId>spring-cloud-stream-modules-test-support</artifactId>
            <version>1.0.0.BUILD-SNAPSHOT</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.jena</groupId>
            <artifactId>jena-core</artifactId>
            <version>3.1.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.8.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

添加模块

app register --name custom-transform --type processor --uri maven://com.openrisk.openmargin:TransformationService:0.0.1-SNAPSHOT

添加流

stream create --definition ":someTesstTopic > custom-transform | log " --name ticktran

部署流

stream deploy ticktran --properties "app.log.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.custom-transform.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.custom-transform.spring.cloud.stream.kafka.bindings.input.consumer.enableDlq"
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2 回答 2

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您的流定义几乎没有问题。

  • 部署属性以 开头app.<app-name>.,但您apps.<app-name>.在几个地方。
  • 目的地是在 SCDF 中自动创建的,因此不建议覆盖默认值。但是,您可以在运行独立spring-cloud-stream应用程序时执行此操作。
  • 您可以通过直接与默认通道交互来启用 D​​LQ,而不是使用自定义目标 - 请参见下面的示例。

流创建 --definition ":someTesssstTopic > transform | log " --name ticktran

流部署 ticktran --properties "app.log.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.transform.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.transform .spring.cloud.stream.kafka.bindings.input.consumer.enableDlq"

  • 在属性中引用时,目的地test-tran的格式不可接受。app.transform.spring.cloud.stream.kafka.bindings.<channelName>.consumer.enableDlq
  • 最后,error.<destination>.<group>主题仅在出现错误时创建。

我们将通过: #885在参考指南中添加一些 DSL 示例。

编辑: 我更新了流定义以反映正确的部署属性前缀。

于 2016-09-15T22:41:56.617 回答
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我使用下面提到的命令将数据流版本更改为1.1 M1 版本以创建和部署属性,它现在可以工作

stream create --definition ":someTesstTopic > transform | log " --name ticktran


stream deploy ticktran --properties "app.log.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.transform.spring.cloud.stream.bindings.input.consumer.headerMode=raw,app.transform.spring.cloud.stream.kafka.bindings.input.consumer.enableDlq"

谢谢萨比阿南丹

于 2016-09-18T02:06:16.730 回答