Grails: How to provide tcp connection from outside to an embedded H2 database?

Step 1) Create web.xml configuration by executing:

grails create-web-xml-config

Step 2) Make this change in WebXmlConfig.groovy

listener.add = true

Step 3) Add a listener in WebXmlConfig.groovy:

listener.classNames = ["org.h2.server.web.DbStarter"]

Step 4) Add following line in WebXmlConfig.groovy:

contextparams = ["db.tcpServer": '-tcpAllowOthers']

Restart grails app now. H2 db should be accessible at port 9092.