Chapter 83. YAML DSL

83.1. What’s inside
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YAML DSL

Please refer to the above link for usage and configuration details.

83.2. Maven coordinates
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Create a new project with this extension on code.quarkus.redhat.com

Or add the coordinates to your existing project:

<dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-yaml-dsl</artifactId>
</dependency>

<dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-yaml-dsl</artifactId>
</dependency>

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83.3. Usage
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83.3.1. Native mode
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The following constructs when defined within Camel YAML DSL markup, require you to register classes for reflection. Refer to the Native mode guide for details.

83.3.1.1. Bean definitions
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The YAML DSL provides the capability to define beans as follows.

- beans:
    - name: "greetingBean"
      type: "org.acme.GreetingBean"
      properties:
        greeting: "Hello World!"
- route:
    id: "my-yaml-route"
    from:
      uri: "timer:from-yaml?period=1000"
      steps:
        - to: "bean:greetingBean"

- beans:
    - name: "greetingBean"
      type: "org.acme.GreetingBean"
      properties:
        greeting: "Hello World!"
- route:
    id: "my-yaml-route"
    from:
      uri: "timer:from-yaml?period=1000"
      steps:
        - to: "bean:greetingBean"

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In this example, the GreetingBean class needs to be registered for reflection. This applies to any types that you refer to under the beans key in your YAML routes.

@RegisterForReflection
public class GreetingBean {
}

@RegisterForReflection
public class GreetingBean {
}

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83.3.1.2. Exception handling
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Camel provides various methods of handling exceptions. Some of these require that any exception classes referenced in their DSL definitions are registered for reflection.

on-exception

- on-exception:
    handled:
      constant: "true"
    exception:
      - "org.acme.MyHandledException"
    steps:
      - transform:
          constant: "Sorry something went wrong"

- on-exception:
    handled:
      constant: "true"
    exception:
      - "org.acme.MyHandledException"
    steps:
      - transform:
          constant: "Sorry something went wrong"

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@RegisterForReflection
public class MyHandledException {
}

@RegisterForReflection
public class MyHandledException {
}

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throw-exception

- route:
    id: "my-yaml-route"
    from:
      uri: "direct:start"
      steps:
        - choice:
            when:
              - simple: "${body} == 'bad value'"
                steps:
                  - throw-exception:
                      exception-type: "org.acme.ForcedException"
                      message: "Forced exception"
            otherwise:
              steps:
                - to: "log:end"

- route:
    id: "my-yaml-route"
    from:
      uri: "direct:start"
      steps:
        - choice:
            when:
              - simple: "${body} == 'bad value'"
                steps:
                  - throw-exception:
                      exception-type: "org.acme.ForcedException"
                      message: "Forced exception"
            otherwise:
              steps:
                - to: "log:end"

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@RegisterForReflection
public class ForcedException {
}

@RegisterForReflection
public class ForcedException {
}

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do-catch

- route:
    id: "my-yaml-route2"
    from:
      uri: "direct:tryCatch"
      steps:
        - do-try:
            steps:
              - to: "direct:readFile"
            do-catch:
              - exception:
                  - "java.io.FileNotFoundException"
                steps:
                  - transform:
                      constant: "do-catch caught an exception"

- route:
    id: "my-yaml-route2"
    from:
      uri: "direct:tryCatch"
      steps:
        - do-try:
            steps:
              - to: "direct:readFile"
            do-catch:
              - exception:
                  - "java.io.FileNotFoundException"
                steps:
                  - transform:
                      constant: "do-catch caught an exception"

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@RegisterForReflection(targets = FileNotFoundException.class)
public class MyClass {
}

@RegisterForReflection(targets = FileNotFoundException.class)
public class MyClass {
}

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83.1. What’s inside
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83.2. Maven coordinates
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83.3. Usage
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83.3.1. Native mode
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83.3.1.1. Bean definitions
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83.3.1.2. Exception handling
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Chapter 83. YAML DSL

83.1. What’s inside复制链接链接已复制到粘贴板!

83.2. Maven coordinates复制链接链接已复制到粘贴板!

83.3. Usage复制链接链接已复制到粘贴板!

83.3.1. Native mode复制链接链接已复制到粘贴板!

83.3.1.1. Bean definitions复制链接链接已复制到粘贴板!

83.3.1.2. Exception handling复制链接链接已复制到粘贴板!

学习

尝试、购买和销售

社区

关于红帽文档

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Red Hat legal and privacy links

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83.1. What’s inside
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83.2. Maven coordinates
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83.3. Usage
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83.3.1. Native mode
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83.3.1.1. Bean definitions
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83.3.1.2. Exception handling
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