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ETL Trello in Oracle Data Integrator

This article shows how to transfer Trello data into a data warehouse using Oracle Data Integrator.

Leverage existing skills by using the JDBC standard to connect to Trello: Through drop-in integration into ETL tools like Oracle Data Integrator (ODI), the CData JDBC Driver for Trello connects real-time Trello data to your data warehouse, business intelligence, and Big Data technologies.

JDBC connectivity enables you to work with Trello just as you would any other database in ODI. As with an RDBMS, you can use the driver to connect directly to the Trello APIs in real time instead of working with flat files.

This article walks through a JDBC-based ETL -- Trello to Oracle. After reverse engineering a data model of Trello entities, you will create a mapping and select a data loading strategy -- since the driver supports SQL-92, this last step can easily be accomplished by selecting the built-in SQL to SQL Loading Knowledge Module.

Install the Driver

To install the driver, copy the driver JAR and .lic file, located in the installation folder, into the ODI userlib directory:

On Unix: ~/.odi/oracledi/userlib On Windows: %APPDATA%\Roaming\odi\oracledi\userlib

Restart ODI to complete the installation.

Reverse Engineer a Model

Reverse engineering the model retrieves metadata about the driver's relational view of Trello data. After reverse engineering, you can query real-time Trello data and create mappings based on Trello tables.

  1. In ODI, connect to your repository and click New -> Model and Topology Objects.
  2. On the Model screen of the resulting dialog, enter the following information:
    • Name: Enter Trello.
    • Technology: Select Generic SQL.
    • Logical Schema: Enter Trello.
    • Context: Select Global.
  3. On the Data Server screen of the resulting dialog, enter the following information:
    • Name: Enter Trello.
    • Driver List: Select Oracle JDBC Driver.
    • Driver: Enter cdata.jdbc.trello.TrelloDriver
    • URL: Enter the JDBC URL containing the connection string.

      Trello uses token-based authentication to grant third-party applications access to their API. When a user has granted an application access to their data, the application is given a token that can be used to make requests to Trello's API.

      Trello's API can be accessed in 2 different ways. The first is using Trello's own Authorization Route, and the second is using OAuth1.0.

      • Authorization Route: At the moment of registration, Trello assigns an API key and Token to the account. See the Help documentation for information on how to connect via the Authorization route.
      • OAuth Route: Similar to using Authorization, OAuth creates an Application Id and Secret when you create your account. See the Help documentation for information on how to to connect.

      Built-in Connection String Designer

      For assistance in constructing the JDBC URL, use the connection string designer built into the Trello JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

      java -jar cdata.jdbc.trello.jar

      Fill in the connection properties and copy the connection string to the clipboard.

      Below is a typical connection string:

      jdbc:trello:APIKey=myApiKey;Token=myGeneratedToken;InitiateOAuth=GETANDREFRESH
  4. On the Physical Schema screen, enter the following information:
    • Schema (Schema): Enter Trello.
    • Schema (Work Schema): Enter Trello.
  5. In the opened model click Reverse Engineer to retrieve the metadata for Trello tables.

Edit and Save Trello Data

After reverse engineering you can now work with Trello data in ODI. To view Trello data, expand the Models accordion in the Designer navigator, right-click a table, and click View data.

Create an ETL Project

Follow the steps below to create an ETL from Trello. You will load Boards entities into the sample data warehouse included in the ODI Getting Started VM.

  1. Open SQL Developer and connect to your Oracle database. Right-click the node for your database in the Connections pane and click new SQL Worksheet.

    Alternatively you can use SQLPlus. From a command prompt enter the following:

    sqlplus / as sysdba
  2. Enter the following query to create a new target table in the sample data warehouse, which is in the ODI_DEMO schema. The following query defines a few columns that match the Boards table in Trello: CREATE TABLE ODI_DEMO.TRG_BOARDS (NAME NUMBER(20,0),BoardId VARCHAR2(255));
  3. In ODI expand the Models accordion in the Designer navigator and double-click the Sales Administration node in the ODI_DEMO folder. The model is opened in the Model Editor.
  4. Click Reverse Engineer. The TRG_BOARDS table is added to the model.
  5. Right-click the Mappings node in your project and click New Mapping. Enter a name for the mapping and clear the Create Empty Dataset option. The Mapping Editor is displayed.
  6. Drag the TRG_BOARDS table from the Sales Administration model onto the mapping.
  7. Drag the Boards table from the Trello model onto the mapping.
  8. Click the source connector point and drag to the target connector point. The Attribute Matching dialog is displayed. For this example, use the default options. The target expressions are then displayed in the properties for the target columns.
  9. Open the Physical tab of the Mapping Editor and click BOARDS_AP in TARGET_GROUP.
  10. In the BOARDS_AP properties, select LKM SQL to SQL (Built-In) on the Loading Knowledge Module tab.

You can then run the mapping to load Trello data into Oracle.