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Chapter 33. Jackson

Marshal POJOs to JSON and back using Jackson

33.1. What’s inside
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JSON Jackson data format

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

33.2. 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-jackson</artifactId>
</dependency>

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

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33.3. Usage
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33.3.1. Configuring the Jackson ObjectMapper
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There are a few ways of configuring the ObjectMapper that the JacksonDataFormat uses. These are outlined below.

33.3.1.1. ObjectMapper created internally by JacksonDataFormat
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By default, JacksonDataFormat will create its own ObjectMapper and use the various configuration options on the DataFormat to configure additional Jackson modules, pretty printing and other features.

33.3.1.2. Custom ObjectMapper for JacksonDataFormat
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You can pass a custom ObjectMapper instance to JacksonDataFormat as follows.

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.jackson.JacksonDataFormat;

public class Routes extends RouteBuilder {
    public void configure() {
        ObjectMapper mapper = new ObjectMapper();
        JacksonDataFormat dataFormat = new JacksonDataFormat();
        dataFormat.setObjectMapper(mapper);
        // Use the dataFormat instance in a route definition
        from("direct:my-direct").marshal(dataFormat)
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.jackson.JacksonDataFormat;

public class Routes extends RouteBuilder {
    public void configure() {
        ObjectMapper mapper = new ObjectMapper();
        JacksonDataFormat dataFormat = new JacksonDataFormat();
        dataFormat.setObjectMapper(mapper);
        // Use the dataFormat instance in a route definition
        from("direct:my-direct").marshal(dataFormat)
    }
}

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33.3.1.3. Using the Quarkus Jackson ObjectMapper with JacksonDataFormat
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The Quarkus Jackson extension exposes an ObjectMapper CDI bean which can be discovered by the JacksonDataFormat.

import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.jackson.JacksonDataFormat;

public class Routes extends RouteBuilder {
    public void configure() {
        JacksonDataFormat dataFormat = new JacksonDataFormat();
        // Make JacksonDataFormat discover the Quarkus Jackson `ObjectMapper` from the Camel registry
        dataFormat.setAutoDiscoverObjectMapper(true);
        // Use the dataFormat instance in a route definition
        from("direct:my-direct").marshal(dataFormat)
    }
}

import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.jackson.JacksonDataFormat;

public class Routes extends RouteBuilder {
    public void configure() {
        JacksonDataFormat dataFormat = new JacksonDataFormat();
        // Make JacksonDataFormat discover the Quarkus Jackson `ObjectMapper` from the Camel registry
        dataFormat.setAutoDiscoverObjectMapper(true);
        // Use the dataFormat instance in a route definition
        from("direct:my-direct").marshal(dataFormat)
    }
}

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If you are using the JSON binding mode in the Camel REST DSL and want to use the Quarkus Jackson ObjectMapper, it can be achieved as follows.

import org.apache.camel.builder.RouteBuilder;

@ApplicationScoped
public class Routes extends RouteBuilder {
    public void configure() {
        restConfiguration().dataFormatProperty("autoDiscoverObjectMapper", "true");
        // REST definition follows...
    }
}

import org.apache.camel.builder.RouteBuilder;

@ApplicationScoped
public class Routes extends RouteBuilder {
    public void configure() {
        restConfiguration().dataFormatProperty("autoDiscoverObjectMapper", "true");
        // REST definition follows...
    }
}

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You can perform customizations on the Quarkus ObjectMapper with a ObjectMapperCustomizer.

import com.fasterxml.jackson.databind.ObjectMapper;
import io.quarkus.jackson.ObjectMapperCustomizer;

@Singleton
public class RegisterCustomModuleCustomizer implements ObjectMapperCustomizer {
    public void customize(ObjectMapper mapper) {
        mapper.registerModule(new CustomModule());
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;
import io.quarkus.jackson.ObjectMapperCustomizer;

@Singleton
public class RegisterCustomModuleCustomizer implements ObjectMapperCustomizer {
    public void customize(ObjectMapper mapper) {
        mapper.registerModule(new CustomModule());
    }
}

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It’s also possible to @Inject the Quarkus ObjectMapper and pass it to the JacksonDataFormat.

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.jackson.JacksonDataFormat;

@ApplicationScoped
public class Routes extends RouteBuilder {
    @Inject
    ObjectMapper mapper;

    public void configure() {
        JacksonDataFormat dataFormat = new JacksonDataFormat();
        dataFormat.setObjectMapper(mapper);
        // Use the dataFormat instance in a route definition
        from("direct:my-direct").marshal(dataFormat)
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.jackson.JacksonDataFormat;

@ApplicationScoped
public class Routes extends RouteBuilder {
    @Inject
    ObjectMapper mapper;

    public void configure() {
        JacksonDataFormat dataFormat = new JacksonDataFormat();
        dataFormat.setObjectMapper(mapper);
        // Use the dataFormat instance in a route definition
        from("direct:my-direct").marshal(dataFormat)
    }
}

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Chapter 33. Jackson

33.1. What’s inside
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33.2. Maven coordinates
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33.3. Usage
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33.3.1. Configuring the Jackson ObjectMapper
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33.3.1.1. ObjectMapper created internally by JacksonDataFormat
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33.3.1.2. Custom ObjectMapper for JacksonDataFormat
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33.3.1.3. Using the Quarkus Jackson ObjectMapper with JacksonDataFormat
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Questo contenuto non è disponibile nella lingua selezionata.

Chapter 33. Jackson

33.1. What’s insideCopia collegamentoCollegamento copiato negli appunti!

33.2. Maven coordinatesCopia collegamentoCollegamento copiato negli appunti!

33.3. UsageCopia collegamentoCollegamento copiato negli appunti!

33.3.1. Configuring the Jackson ObjectMapperCopia collegamentoCollegamento copiato negli appunti!

33.3.1.1. ObjectMapper created internally by JacksonDataFormatCopia collegamentoCollegamento copiato negli appunti!

33.3.1.2. Custom ObjectMapper for JacksonDataFormatCopia collegamentoCollegamento copiato negli appunti!

33.3.1.3. Using the Quarkus Jackson ObjectMapper with JacksonDataFormatCopia collegamentoCollegamento copiato negli appunti!

Formazione

Prova, acquista e vendi

Community

Informazioni sulla documentazione di Red Hat

Rendiamo l’open source più inclusivo

Informazioni su Red Hat

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links

33.1. What’s inside
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33.2. Maven coordinates
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33.3. Usage
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33.3.1. Configuring the Jackson ObjectMapper
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33.3.1.1. ObjectMapper created internally by JacksonDataFormat
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33.3.1.2. Custom ObjectMapper for JacksonDataFormat
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33.3.1.3. Using the Quarkus Jackson ObjectMapper with JacksonDataFormat
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