Connect to Telegram Data from a Connection Pool in Jetty

The CData JDBC driver for Telegram is easy to integrate with Java Web applications. This article shows how to efficiently connect to Telegram data in Jetty by configuring the driver for connection pooling. You will configure a JNDI resource for Telegram in Jetty.

Configure the JDBC Driver for Salesforce as a JNDI Data Source

Follow the steps below to connect to Salesforce from Jetty.

1. Enable the JNDI module for your Jetty base. The following command enables JNDI from the command-line:

   java -jar ../start.jar --add-to-startd=jndi
   

2. Add the CData and license file, located in the lib subfolder of the installation directory, into the lib subfolder of the context path.

3. Declare the resource and its scope. Enter the required connection properties in the resource declaration. This example declares the Telegram data source at the level of the Web app, in WEB-INF\jetty-env.xml.

   <Configure id='telegramdemo' class="org.eclipse.jetty.webapp.WebAppContext">
    <New id="telegramdemo" class="org.eclipse.jetty.plus.jndi.Resource">
    <Arg><Ref refid="telegramdemo"/></Arg>
    <Arg>jdbc/telegramdb</Arg>
    <Arg>
    <New class="cdata.jdbc.api.APIDriver">
    <Set name="url">jdbc:api:</Set>
    <Set name="Profile">C:\profiles\Telegram.apip</Set>
    <Set name="ProfileSettings">'APIKey</Set>
    </New>
    </Arg>
    </New>
   </Configure>
   

   Using API Key Authentication

   Telegram uses Bot Tokens to authenticate API requests. You can obtain a Bot Token by creating a bot via BotFather on Telegram (https://t.me/BotFather). Once created, BotFather will provide a token in the format

   123456789:ABCdefGhIJKlmNoPQRsTUVwxyZ

   .

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

   • AuthScheme: Set this to APIKey.
   • APIKey: Set this to your Telegram Bot Token obtained from BotFather.

   Example connection string

   Profile=C:\profiles\Telegram.apip;ProfileSettings='APIKey=your_bot_token';
   

4. Configure the resource in the Web.xml:

    jdbc/telegramdb
    javax.sql.DataSource
    Container
   
   

5. You can then access Telegram with a lookup to java:comp/env/jdbc/telegramdb:

   InitialContext ctx = new InitialContext();
   DataSource mytelegram = (DataSource)ctx.lookup("java:comp/env/jdbc/telegramdb");
   

More Jetty Integration

The steps above show how to configure the driver in a simple connection pooling scenario. For more use cases and information, see the Working with Jetty JNDI chapter in the Jetty documentation.