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Chapter 2. Fuse Online

Fuse Online provides a web browser interface that lets a business expert integrate two or more different applications or services without writing code. It also provides features that allow the addition of code if it is needed for complex use cases.

Fuse Online runs an integration on OpenShift as a Spring Boot application that uses Apache Camel.

2.1. About Fuse Online distributions

Fuse Online is Red Hat’s web-based integration platform. Syndesis is the open source project for Fuse Online. Fuse Online runs in these OpenShift environments:

Host Environment


OpenShift Online
OpenShift Dedicated

Red Hat installs and provisions Fuse Online on Red Hat infrastructure.

OpenShift Container Platform

Customer installs and manages.

2.2. Changes and new features in 7.2

The changes and new features in Fuse Online 7.2 are:

  • New connector for Google Calendar.
  • The following connectors are now supported. They were Technology Preview features in the previous release:

    • Log connects to the integration’s log where you can direct messages that are in addition to automatic logging.
    • SAP Concur connects to the expense management tool to perform a large variety of operations.
    • Telegram connects to the cloud-based messaging app to receive and send messages.
    • Timer triggers execution of an integration at an interval that you specify or based on a Unix cron expression.
  • You can now add a template step to process data between connections.

    In an integration, a template step takes data from a source and inserts it into the format that is defined in a template that you upload to Fuse Online. The benefit of a template step is that it provides data output in a consistent format that you specify.

    In this release, Fuse Online supports only Mustache templates.

  • Data mapper updates:

    • You can now preview data mapping results for the currently selected mapping. To turn on mapping preview, in the data mapper, click the editor settings icon in the upper right and select Show Mapping Preview.
    • Transformations for handling collections have been added.

2.3. Upgrading existing integrations that are running on OpenShift Online

When Fuse 7.2 is released, the Fuse Online infrastructure on OpenShift Online is automatically upgraded. During the infrastructure upgrade, any existing integrations that are running on OpenShift Online continue to run both during and after the upgrade. However, the existing integrations continue to run with the older versions of Fuse libraries and dependencies.

After you receive an email message that lets you know that the Fuse Online infrastructure has been upgraded to the new release, upgrade your existing integrations by republishing them (not just restarting them). Do this as soon as you can. If any of your integrations connect to Gmail, see the information in Important notes, below, before you upgrade those integrations.

To republish your integrations, in your Fuse Online environment, in the left navigation panel, click Integrations. Then do the following for each integration:

  1. To the right of the integration entry, click three vertical dots and select Edit.
  2. When Fuse Online displays the integration for editing, in the upper right, click Publish.

Publishing forces a rebuild that uses the latest Fuse Online dependencies.


The Fuse Online user interface shows a warning, if any element of an integration has a newer dependency that needs to be updated.

2.4. Important notes

Important notes for the Fuse 7.2 release of the Fuse Online distribution:

  • In the previous release, published integrations that connected to Gmail stopped executing because their Gmail API access token expired. This no longer happens in Fuse Online 7.2 but to take advantage of this improvement, you must obtain and use new credentials as follows:

    1. In the Google developers console, create a new set of OAuth credentials. For help, see Register as a Gmail client.
    2. Copy the new Google client ID and new Google client secret to the Gmail entry in the Fuse Online Settings page, and click Save and click Ok.
    3. In the left navigation panel, click Connections.
    4. For each of your Gmail connections:

      1. In the upper right of the Gmail connection card, click three vertical dots and select View.
      2. Click Reconnect and respond to the prompt in Google.
    5. Republish each integration as described in the upgrade information that is just before this section.
  • A Fuse Online account is limited to a specific number of integrations that can be running at one time. For details, see the pricing plan. If you are using a Fuse Online evaluation account, then only one integration at a time can be running.
  • An OpenAPI schema that you upload to Fuse Online might not define input/output types. When Fuse Online creates a custom API client from an OpenAPI schema that does not specify input/output types then it is not possible to create an integration that maps integration data to fields that the API client can process or from fields that the API client processed. If an integration requires data mapping to or from a custom API, then when you upload the OpenAPI schema, click Review/Edit to open Apicurio Studio, which is an API design tool, and add input/output type specifications.

2.5. Obtaining technical support

To obtain technical support, in Fuse Online, in the upper right, click InfoIcon and then click Support to display the Fuse Online support page. Use this page to download diagnostic information for all integrations or for one or more integrations that you choose. The page provides instructions for opening a support ticket and providing the diagnostic information that you downloaded.

2.6. Technology Preview features

This release includes the Technology Preview features that are listed below.


Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information, see Red Hat Technology Preview features support scope.

  • API Provider integrations

    To trigger execution of an integration on demand, start the integration with a REST API service that you provide and that Fuse Online makes available. Fuse Online creates an execution path, referred to as an integration flow, for each REST API operation. You can add connections and steps to each integration flow. Each REST API client call triggers execution of one integration flow.

  • Connectors for:

    • FHIR - connects to a Fast Healthcare Interoperability Resources (FHIR) server.
    • IRC - connects to text-based Internet Relay Chat to receive and send messages.
  • For a REST API client that uses OAuth, when you create an API client connector, you can change the default OAuth2 behavior of connections that you create from that connector. Fuse Online vendor extensions to the OpenAPI specification support the following:

    • Providing client credentials as parameters.
    • Obtaining a new access token based on HTTP response status codes.