Connect to Postmark Data from a Connection Pool in Jetty

The CData JDBC driver for Postmark is easy to integrate with Java Web applications. This article shows how to efficiently connect to Postmark data in Jetty by configuring the driver for connection pooling. You will configure a JNDI resource for Postmark 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 Postmark data source at the level of the Web app, in WEB-INF\jetty-env.xml.

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

   Using API Key Authentication

   Postmark uses server API tokens to authenticate requests. Each Postmark server has its own API token, which controls access to messages, bounces, templates, and statistics associated with that server.

   To obtain your Server API Token, log in to your Postmark account and navigate to the server you want to connect to. Go to API Tokens under the server settings and copy the token labeled Server API token.

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

   • AuthScheme: Set this to APIKey.
   • APIKey: Set this to your Postmark Server API Token. This value is sent as the X-Postmark-Server-Token header on every request.

   Example connection string:

   Profile=C:\profiles\Postmark.apip;AuthScheme=APIKey;ProfileSettings="APIKey=your-server-api-token"
   

   Connecting to Postmark

   Once the authentication is configured, you can connect to Postmark and query data from any of the available tables such as OutboundMessages, Bounces, and Templates.

4. Configure the resource in the Web.xml:

   
     jdbc/postmarkdb
     javax.sql.DataSource
     Container
   
   

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

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

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.