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Chapter 53. Avro

This component provides a dataformat for avro, which allows serialization and deserialization of messages using Apache Avro’s binary dataformat. Since Camel 3.2 rpc functionality was moved into separate camel-avro-rpc component.

Maven users will need to add the following dependency to their pom.xml for this component: 

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-avro</artifactId>
    <version>{CamelSBVersion}</version>
    <!-- use the same version as your Camel core version -->
</dependency>
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You can easily generate classes from a schema, using maven, ant etc. More details can be found at the Apache Avro documentation.

53.1. Avro Dataformat Options
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The Avro dataformat supports 1 options, which are listed below.

Expand
NameDefaultJava TypeDescription

instanceClassName

 

String

Class name to use for marshal and unmarshalling.

53.2. Avro Data Format usage
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Using the avro data format is as easy as specifying that the class that you want to marshal or unmarshal in your route. 

AvroDataFormat format = new AvroDataFormat(Value.SCHEMA$);

from("direct:in").marshal(format).to("direct:marshal");
from("direct:back").unmarshal(format).to("direct:unmarshal");
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Where Value is an Avro Maven Plugin Generated class.

or in XML 

    <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
        <route>
            <from uri="direct:in"/>
            <marshal>
                <avro instanceClass="org.apache.camel.dataformat.avro.Message"/>
            </marshal>
            <to uri="log:out"/>
        </route>
    </camelContext>
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An alternative can be to specify the dataformat inside the context and reference it from your route. 

    <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
         <dataFormats>
            <avro id="avro" instanceClass="org.apache.camel.dataformat.avro.Message"/>
        </dataFormats>
        <route>
            <from uri="direct:in"/>
            <marshal><custom ref="avro"/></marshal>
            <to uri="log:out"/>
        </route>
    </camelContext>
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In the same manner you can umarshal using the avro data format.

53.3. Spring Boot Auto-Configuration
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When using avro with Spring Boot make sure to use the following Maven dependency to have support for auto configuration: 

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-avro-starter</artifactId>
  <version>{CamelSBProjectVersion}</version>
  <!-- Use your Camel Spring Boot version -->
</dependency>
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The component supports 2 options, which are listed below.

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NameDescriptionDefaultType

camel.dataformat.avro.enabled

Whether to enable auto configuration of the avro data format. This is enabled by default.

 

Boolean

camel.dataformat.avro.instance-class-name

Class name to use for marshal and unmarshalling.

 

String

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