Chapter 3. Avro
Chapter 3. 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. You can easily generate classes from a schema, using maven, ant etc. More details can be found at the Apache Avro documentation . 3.1. Dependencies When using camel-avro with Red Hat build of Camel Spring Boot, add the following Maven dependency to have support for auto configuration: <dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-avro-starter</artifactId> </dependency> 3.2. Avro Dataformat Options The Avro dataformat supports 1 options, which are listed below. Name Default Java Type Description instanceClassName String Class name to use for marshal and unmarshalling. 3.3. 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.SCHEMAUSD); from("direct:in").marshal(format).to("direct:marshal"); from("direct:back").unmarshal(format).to("direct:unmarshal"); 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> 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> In the same manner you can umarshal using the avro data format. 3.4. Spring Boot Auto-Configuration When using avro with Spring Boot make sure to add the Maven dependency to have support for auto configuration. The component supports 2 options, which are listed below. Name Description Default Type 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
<dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-avro-starter</artifactId> </dependency> AvroDataFormat format = new AvroDataFormat(Value.SCHEMAUSD); from("direct:in").marshal(format).to("direct:marshal"); from("direct:back").unmarshal(format).to("direct:unmarshal"); <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> <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>