Configure the CData JDBC Driver for CircleCI in a Connection Pool in Tomcat

The CData JDBC Drivers support standard JDBC interfaces to integrate with Web applications running on the JVM. This article details how to connect to CircleCI data from a connection pool in Tomcat.

Connect to CircleCI Data through a Connection Pool in Tomcat

1. Copy the CData JAR and CData .lic file to $CATALINA_HOME/lib. The CData JAR is located in the lib subfolder of the installation directory.
2. Add a definition of the resource to the context. Specify the JDBC URL here.

   Using API Key Authentication

   CircleCI uses personal API tokens to authenticate API requests. To generate a personal API token, log in to your CircleCI account, navigate to User Settings > Personal API Tokens, and click Create New Token. Copy the token value immediately as it is only shown once.

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

   • AuthScheme: Set this to APIKey.
   • APIKey: Set this to your CircleCI personal API token.

   Example connection string:

   Profile=C:\profiles\CircleCI.apip;AuthScheme=APIKey;ProfileSettings='APIKey=your_personal_api_token';
   

   Built-in Connection String Designer

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

   

   You can see the JDBC URL specified in the resource definition below.

   
   <Resource name="jdbc/api"   auth="Container" type="javax.sql.DataSource" driverClassName="cdata.jdbc.api.APIDriver" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" url="jdbc:api:Profile=C:\profiles\CircleCI.apip;AuthScheme=APIKey;ProfileSettings='APIKey=your_personal_api_token';" maxActive="20" maxIdle="10" maxWait="-1" />
   

   To allow a single application to access CircleCI data, add the code above to the context.xml in the application's META-INF directory.

   For a shared resource configuration, add the code above to the context.xml located in $CATALINA_BASE/conf. A shared resource configuration provides connectivity to CircleCI for all applications.

3. Add a reference to the resource to the web.xml for the application.

   
     CircleCI data JSP
     jdbc/API
     javax.sql.DataSource
     Container
   
   

4. Initialize connections from the connection pool:

   Context initContext = new InitialContext();
   Context envContext  = (Context)initContext.lookup("java:/comp/env");
   DataSource ds = (DataSource)envContext.lookup("jdbc/API");
   Connection conn = ds.getConnection();
     

More Tomcat Integration

The steps above show how to connect to CircleCI data in a simple connection pooling scenario. For more use cases and information, see the JNDI Datasource How-To in the Tomcat documentation.