Create HDFS-Connected Nintex Workflows

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CData Connect Server


Use CData Connect Server to connect to HDFS from Nintex Workflow Cloud and build custom workflows using live HDFS data.

Nintex Workflow Cloud is a cloud-based platform where you can design workflows to automate simple or complex processes using drag-and-drop interactions — without writing any code. When paired with CData Connect Server, you get instant, cloud-to-cloud access to HDFS data for business applications. This article shows how to create a virtual database for HDFS in Connect Server and build a simple workflow from HDFS data in Nintex.

CData Connect Server provides a pure MySQL, cloud-to-cloud interface for HDFS, allowing you to build workflows from live HDFS data in Nintex Workflow Cloud — without replicating the data to a natively supported database. Nintex allows you to access data directly using SQL queries. Using optimized data processing out of the box, CData Connect Server pushes all supported SQL operations (filters, JOINs, etc.) directly to HDFS, leveraging server-side processing to quickly return the requested HDFS data.

Create a Virtual MySQL Database for HDFS Data

CData Connect Server uses a straightforward, point-and-click interface to connect to data sources and generate APIs.

  1. Log into Connect Server and click Databases.
  2. Select "HDFS" from Available Data Sources.
  3. Enter the necessary authentication properties to connect to HDFS.

    In order to authenticate, set the following connection properties:

    • Host: Set this value to the host of your HDFS installation.
    • Port: Set this value to the port of your HDFS installation. Default port: 50070
  4. Click Test Database.
  5. Click Privileges -> Add and add the new user (or an existing user) with the appropriate permissions.

With the virtual database created, you are ready to connect to HDFS data from Nintex.

Connect to HDFS in Nintex

The steps below outline creating a new connection for access to HDFS CData Connect Server from Nintex to create a new HDFS data source.

  1. Log into Nintex Workflow Cloud
  2. In the Connections tab, click "Add new"
  3. Select MySQL as the connector and click "Connect"
  4. In the MySQL connection wizard, set the following properties:
    • Connection Name: name the connection (e.g., CData Connect Server HDFS Connection)
    • Username: your Connect Server username
    • Password: your Connect Server password
    • Database Host: your Connect Server MySQL endpoint (e.g., myinstance.cdatacloud.net)
    • Database Name: the virtual HDFS database (e.g., HDFS1)
  5. Click "Connect"
  6. Configure the connection permissions and click "Save permissions"

Create a Simple HDFS Workflow

With the connection to CData Connect Server configured, we are ready to build a simple workflow to access HDFS data. Start by clicking the "Create workflow" button.

Configure the Start Event Action

  1. Click the start event task and select the "Form" event
  2. Click "Design form"
  3. Drag a "Text - Long" element onto the Form and click the element to configure it
    • Set "Title" to "Enter SQL query"
    • Set "Required" to true
  4. Drag a "Text - Short" element onto the Form and click the element to configure it
    • Set "Title" to "Enter desired result column"
    • Set "Required" to true

Configure an "Execute a Query" Action

  1. Add an "Execute a query" action after the "Start event: Form" action and click to configure the action
  2. Set "SQL Script" to the "Enter SQL Query" variable from the "Start event" action
  3. Set "Column to retrieve" to the "Enter desired result column" variable from the "Start event" action
  4. Set "Retrieved column" to a new variable (e.g., "values")

Configure a "Send an Email" Action

  1. Add a "Send an email" action after the "Execute a query" action and click to configure the action
  2. Set the "Recipient email address"
  3. Set the "Subject"
  4. Set the "Message body" to the variable created for the retrieved column

Once you configure the actions, click "Save," name the Workflow, and click "Save" again. You now have a simple workflow that will query HDFS using SQL and send an email with the results.

To learn more about SQL data access to 200+ SaaS, Big Data, and NoSQL sources directly from your cloud applications, check out the CData Connect Server. Sign up for a free trial and reach out to our Support Team if you have any questions.