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URL: https://www.cdata.com/kb/tech/hackernews-jdbc-birt.rst

⇱ Design BIRT Reports on Hacker News Data

Design BIRT Reports on Hacker News Data

👁 Jerod Johnson
Jerod Johnson
Director, Technology Evangelism
Provide current Hacker News data to your embedded analytics.

The CData JDBC Driver for Hacker News integrates connectivity to Hacker News APIs into your data-driven Java applications. You can use the CData JDBC Driver for Hacker News with the BIRT (Business Intelligence Reporting Tools) platform to create BIRT reports that reflect changes to your data in real time.

  1. If you have not already done so, install the BIRT Framework plugin and the Database Development plugin for Eclipse.
  2. Click File -> New -> Report. The Report Design perspective is opened.
  3. In the Data Explorer, right-click Data Sources and click New Data Source.
  4. Select the Create from a Data Source Type in the Following List option and select JDBC Data Source.
  5. Click Manage Drivers and add the driver JAR, located in the lib subfolder of the installation folder.
  6. In the Database URL box, enter the JDBC URL containing the connection string.

    Connecting to HackerNews

    The HackerNews API (powered by Firebase) is a public API that requires no authentication. You can connect and query data immediately without any credentials.

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

    • AuthScheme: Set this to None.

    Example connection string:

    Profile=C:\profiles\HackerNews.apip;AuthScheme=None

    Built-in Connection String Designer

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

    java -jar cdata.jdbc.api.jar

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

    👁 Using the built-in connection string designer to generate a JDBC URL (Salesforce is shown.)

    When you configure the JDBC URL, you may also want to set the Max Rows connection property. This will limit the number of rows returned, which is especially helpful for improving performance when designing reports and visualizations.

    A typical JDBC URL is below:

    jdbc:api:Profile=C:\profiles\HackerNews.apip;AuthScheme=None
  7. Right-click the Data Sets folder and select the JDBC data source for Hacker News.
  8. In the resulting dialog, build the SELECT query to be used to retrieve the data for the report. This article uses the following query: 
    SELECT , FROM TopStories WHERE = ''
  9. In the Palette, drag a Chart onto the editor. The chart wizard is displayed.
  10. After selecting the chart type, drag columns onto the chart fields on the Select Data tab.
  11. Click Run -> View Report -> In Web Viewer to view the report.

Your BIRT reports can now pick up any updates to Hacker News data. 👁 A BIRT report that can be refreshed on demand. (Salesforce is shown.)

To publish the report to your application server, add the driver JAR to the BIRT Viewer's classpath. For more information, see the CData KB for guides to deploying the JDBC Driver on Java application servers.