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Chapter 68. 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.

68.1. Avro Dataformat Options

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

Expand
NameDefaultJava TypeDescription

instanceClassName

 

String

Class name to use for marshal and unmarshalling.

68.2. Avro Data Format usage

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.

68.3. Spring Boot Auto-Configuration

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>
</dependency>
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The component supports 2 options, which are listed below.

Expand
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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