Extract, Transform, and Load Harvest Data in Informatica PowerCenter

Informatica provides a powerful, elegant means of transporting and transforming your data. By utilizing the CData ODBC Driver for Harvest, you are gaining access to a driver based on industry-proven standards that integrates seamlessly with Informatica's powerful data transportation and manipulation features. This tutorial shows how to create a simple Workflow in Informatica PowerCenter to extract Harvest data and load it into a flat file.

Add Harvest as an ODBC Data Source

If you have not already, install the driver on the PowerCenter server and client machines. On both machines, specify the connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Start by setting the Profile connection property to the location of the Harvest Profile on disk (e.g. C:\profiles\Harvest.apip). Next, set the ProfileSettings connection property to the connection string for Harvest (see below).

Harvest API Profile Settings

To authenticate to Harvest, you can use either Token authentication or the OAuth standard. Use Basic authentication to connect to your own data. Use OAuth to allow other users to connect to their data.

Using Token Authentication

To use Token Authentication, set the APIKey to your Harvest Personal Access Token in the ProfileSettings connection property. In addition to APIKey, set your AccountId in ProfileSettings to connect.

Using OAuth Authentication

First, register an OAuth2 application with Harvest. The application can be created from the "Developers" section of Harvest ID.

After setting the following connection properties, you are ready to connect:

• ProfileSettings: Set your AccountId in ProfileSettings.
• AuthScheme: Set this to OAuth.
• OAuthClientId: Set this to the client ID that you specified in your app settings.
• OAuthClientSecret: Set this to the client secret that you specified in your app settings.
• CallbackURL: Set this to the Redirect URI that you specified in your app settings.
• InitiateOAuth: Set this to GETANDREFRESH. You can use InitiateOAuth to manage how the driver obtains and refreshes the OAuthAccessToken.

Create an ETL Workflow in PowerCenter

Follow the steps below to create a workflow in PowerCenter to pull Harvest data and push it into a flat file.

Create a Source Using the ODBC Driver

1. In the powrmart.ini file found in %INFA_HOME%\clients\PowerCenterClient\client\bin, add the following line to the ODBCDLL section:

   CData=PMODBC.DLL

2. In PowerCenter Workflow Manager, add a new ODBC relational connection, set the user name and password properties to the user for the machine on which the ODBC Driver is installed, and set the connect string to the System DSN for the driver (CData API Sys).
3. In PowerCenter Designer, connect to your repository and open your folder.
4. Select the Source Analyzer, click the sources menu, and select Import from Database...
5. In the drop-down menu for ODBC data source, select the DSN you previously configured (CData API Sys).
6. Click connect and select the tables and views to include.
7. Click OK.

Create a Flat File Target Based on the Source

1. Select the Targets Analyzer and drag and drop the previously created source onto the workspace. Using the existing source copies the columns into the target.
2. Right-click the new target, click edit, and change the database type to flat file.

Create a Mapping to Between Harvest Data and a Flat File

1. Click on the Mapping Designer.
2. Drag the source and target to the workspace (name the new mapping, if prompted).
3. Right-click on the workspace and select Autolink by Name.
4. Drag the columns from the source qualifier to the target definition.
5. Save the folder (Ctrl + S).

Create Workflow Based on the Mapping

With the source, target, and mapping created and saved, you are now ready to create the workflow.

1. Right-click the mapping and select generate workflow to open the Workflow Generation wizard.
2. Create a workflow with a non-reusable session.
3. Ensure that you have properly configured the connection object (to the relational connection we created earlier) and set the prefixes.
4. Configure the Connection as needed.
5. Review the Workflow and click Finish.

With a workflow created, you can open the PowerCenter Workflow Manager to access and start the workflow, quickly transferring Harvest data into a flat file. With the ODBC Driver for Harvest, you can configure sources and targets in PowerCenter to integrate Harvest data into any of the elegant and powerful features in Informatica PowerCenter.