Connect to Gmail Data from a Connection Pool in Jetty

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

   <Configure id='gmaildemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="gmaildemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="gmaildemo"/></Arg> <Arg>jdbc/gmaildb</Arg> <Arg> <New class="cdata.jdbc.gmail.GmailDriver"> <Set name="url">jdbc:gmail:</Set> <Set name="User">username</Set> <Set name="Password">password</Set> </New> </Arg> </New> </Configure>

   There are two ways to authenticate to Gmail. Before selecting one, first ensure that you have enabled IMAP access in your Gmail account settings. See the "Connecting to Gmail" section under "Getting Started" in the installed documentation for a guide.

   The User and Password properties, under the Authentication section, can be set to valid Gmail user credentials.

   Alternatively, instead of providing the Password, you can use the OAuth authentication standard. To access Google APIs on behalf on individual users, you can use the embedded credentials or you can register your own OAuth app.

   OAuth also enables you to use a service account to connect on behalf of users in a Google Apps domain. To authenticate with a service account, you will need to register an application to obtain the OAuth JWT values.

   In addition to the OAuth values, you will need to provide the User. See the "Getting Started" chapter in the help documentation for a guide to using OAuth.

4. Configure the resource in the Web.xml:

   jdbc/gmaildb javax.sql.DataSource Container

5. You can then access Gmail with a lookup to java:comp/env/jdbc/gmaildb: InitialContext ctx = new InitialContext(); DataSource mygmail = (DataSource)ctx.lookup("java:comp/env/jdbc/gmaildb");

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.