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Build HPCC Systems-Connected Web Apps in Servoy

Use Servoy Developer to easily connect to HPCC Systems data and build web apps with connectivity to live HPCC Systems data.

Servoy is a rapid application development and deployment platform. When paired with the CData JDBC Driver for HPCC Systems, users can build HPCC Systems-connected apps that work with live HPCC Systems data. This article describes how to connect to HPCC Systems from Servoy and build a simple web app to display and search HPCC Systems data.

With built-in optimized data processing, the CData JDBC Driver offers unmatched performance for interacting with live HPCC Systems data. When you issue complex SQL queries to HPCC Systems, the driver pushes supported SQL operations, like filters and aggregations, directly to HPCC Systems and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations). Its built-in dynamic metadata querying lets you work with HPCC Systems data using native data types.

Connect to HPCC Systems in Servoy Developer

To build HPCC Systems-connected apps, you need to first create a data provider in Servoy Developer using the CData JDBC Driver for HPCC Systems.

  1. Install the JDBC Driver.
  2. Copy the JDBC Driver JAR file. (cdata.jdbc.hpcc.jar) to the /application_server/drivers/ directory in the installation directory for Servoy.
  3. Open Servoy Developer.
  4. In the Solution Explorer, right-click Database Server (under Resources) and choose "Connect to existing database" -> "empty."
    1. Name the server.
    2. Click to show the advanced server settings.
      • Set the URL, for example: jdbc:hpcc:URL=http://127.0.0.1:8510;User=test;password=xA123456;Version=1;Cluster=hthor;

        Built-In Connection String Designer

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

        java -jar cdata.jdbc.hpcc.jar

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

        To connect, set the following connection properties: Set URL to the machine name or IP address of the server and the port the server is running on, for example, https://server:port. The User and Password are required to authenticate to the HPCC Systems cluster specified in the URL. Note that LDAP authentication is not currently supported by our ODBC driver.

        Set Version to the WsSQL Web server version. Note that if you have not already done so, you will need to install the WsSQL service on the HPCC Systems server. The WsSQL Web service is used to interact with the underlying HPCC Systems platform.

        Set Cluster to the target cluster.

      • Select the Driver class you just copied, for example, cdata.jdbc.hpcc.HPCCDriver

Build a HPCC Systems-Connected Web App

Once you have configured the connection to HPCC Systems in the Servoy Developer resources, you are ready to build apps with access to live HPCC Systems data.

Create a New Solution

  1. In the Server Explorer, right-click "All solutions" and select "Create new solution."
  2. Name the solution.
  3. Select the checkbox to include the "search" module.
  4. Click "Finish."

Create a New Form

Right-click "Forms" and select "Create new form."

  1. Name the form.
  2. Select a Datasource.
  3. Set the type (e.g., Simple) and click "Finish."

Add a Data Grid to the Form

  1. Drag a Data Grid component (from Servoy NG-Grids) onto the form.
  2. Drag a column component onto the Data Grid and set the "dataprovider" property for each column component to a column from the HPCC Systems "table" (e.g., CustomerName from the hpcc::test::orders table).

    Continue adding columns as desired.

Add Searching to the App

Note that the "svySearch" extension is required to add search functionality (included by default when you create a new solution). If you did not add the extension when you created the solution or you are modifying an existing solution, you can add the search module by right-clicking Modules (in the solution) and selecting "Add Module." Select "svySearch" and click "OK."

  1. Drag a Text Field component onto the Form.
  2. Right-click the Form and select "Open in Script Editor."
  3. Create a new variable (JavaScript) to hold the search value:
    var searchText = '';
    
  4. Back on the Form, in the Text Field properties:
    1. Set the "dataprovider" property to the Form variable you just created.
    2. Double-click to add a method for the onAction event.
    3. Click to create the method in "Form," name the method (e.g., onEnter), and click "Create private."
    4. Click "OK & Show."
  5. Add the following JavaScript to the JavaScript file to use the Servoy framework to implement searching bound data based on the text in the Text Field:
    var search = scopes.svySearch.createSimpleSearch(foundset).setSearchText(searchText);
    search.setSearchAllColumns();
    search.loadRecords(foundset);
    

Save and Launch the App

Save the form and JavaScript file, then click Run -> Launch NGClient to start the web app.

Download a free, 30-day trial of the CData JDBC Driver for HPCC Systems and start building HPCC Systems-connected apps with Servoy. Reach out to our Support Team if you have any questions.