Create a Data Access Object for Telegram Data using JDBI

JDBI is a SQL convenience library for Java that exposes two different style APIs, a fluent style and a SQL object style. The CData JDBC Driver for Telegram integrates connectivity to live Telegram data in Java applications. By pairing these technologies, you gain simple, programmatic access to Telegram data. This article explains how to build a basic Data Access Object (DAO) and the accompanying code to read Telegram data.

Create a DAO for the Telegram AvailableGifts Entity

The interface below declares the desired behavior for the SQL object to create a single method for each SQL statement to be implemented.

public interface MyAvailableGiftsDAO {
  //request specific data from Telegram (String type is used for simplicity)
  @SqlQuery("SELECT  FROM AvailableGifts WHERE  = :")
  String findBy(@Bind("") String );

  /*
   * close with no args is used to close the connection
   */
  void close();
}

Open a Connection to Telegram

Collect the necessary connection properties and construct the appropriate JDBC URL for connecting to Telegram.

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';

Built-in Connection String Designer

For assistance in constructing the JDBC URL, use the connection string designer built into the Telegram 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.

A connection string for Telegram will typically look like the following:

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

Use the configured JDBC URL to obtain an instance of the DAO interface. The particular method shown below will open a handle bound to the instance, so the instance needs to be closed explicitly to release the handle and the bound JDBC connection.

DBI dbi = new DBI("jdbc:api:Profile=C:\profiles\Telegram.apip;ProfileSettings='APIKey=your_bot_token';");
MyAvailableGiftsDAO dao = dbi.open(MyAvailableGiftsDAO.class);

//do stuff with the DAO

dao.close();

Read Telegram Data

With the connection open to Telegram, simply call the previously defined method to retrieve data from the AvailableGifts entity in Telegram.

//disply the result of our 'find' method
String  = dao.findBy("");
System.out.println();

Since the JDBI library is able to work with JDBC connections, you can easily produce a SQL Object API for Telegram by integrating with the CData JDBC Driver for Telegram. Download a free trial and work with live Telegram data in custom Java applications today.