CloudEvents XML Format

This module provides and EventFormat implementation that adheres to the CloudEvent XML Format specification.

This format also supports specialized handling for XML CloudEvent data.

For Maven based projects, use the following dependency:

<dependency>
    <groupId>io.cloudevents</groupId>
    <artifactId>cloudevents-xml</artifactId>
    <version>4.0.1</version>
</dependency>

Using the XML Event Format

You don’t need to perform any operation to configure the module, more than adding the dependency to your project:

import io.cloudevents.CloudEvent;
import io.cloudevents.core.format.ContentType;
import io.cloudevents.core.provider.EventFormatProvider;
import io.cloudevents.core.builder.CloudEventBuilder;

CloudEvent event = CloudEventBuilder.v1()
    .withId("hello")
    .withType("example.xml")
    .withSource(URI.create("http://localhost"))
    .build();

byte[] serialized = EventFormatProvider
    .getInstance()
    .resolveFormat(ContentType.XML)
    .serialize(event);

The EventFormatProvider will resolve automatically the XMLFormat using the ServiceLoader APIs.

XML Document data handling is supported via the XMLCloudEventData facility. This convenience wrapper can be used with any other supported format.

import org.w3c.dom.Document;
import io.cloudevents.CloudEvent;
import io.cloudevents.core.builder.CloudEventBuilder;
import io.cloudevents.xml.XMLCloudEventData;

// Create the business event data.
Document xmlDoc = .... ;

// Wrap it into CloudEventData
CloudEventData myData = XMLCloudEventData.wrap(xmlDoc);

// Construct the event
CloudEvent event = CloudEventBuilder.v1()
    .withId("hello")
    .withType("example.xml")
    .withSource(URI.create("http://localhost"))
    .withData(myData)
    .build();