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Grails Glassfish plugin

A plugin for Grails, that makes Glassfish the default app server during development.

It may be useful, when you have Glassfish application server in your production environment, and want to test your software during development in production-like environment.


Just now, there are several ways of getting plugin installed. First, the default for any common Grails plugin, is the most simple way. But if for some reason, it's not your variant, you can chose any other way.

Default Grails-way

Like usual Grails plugin, Glassfish plugin is available from Grails Central Plugin Repository. And you can install it simply by adding a dependency to BuildConfig.groovy:

plugins {
   build ':glassfish:0.1.2'

Get ready-to-use plugin

You can get packaged and ready-to-use plugin. First, download it:

latest version of plugin

And then install it:

grails install-plugin /path/where/your/donwload/plugin

Build from source and install

Finally, you can manually build plugin from source on your local machine, and then install it. You need checkout last version of sources of plugin:

git clone

Then you need to package plugin:

grails package-plugin

And finally, you need to install packaged plugin:

grails install-plugin /path/to/packaged/plugin


First of all, you need to remove other app server plugin, if you have it already installed(cuz it can cause confusion). For example, if you have Tomcat app server plugin installed(default behavior for any newly created Grails application), you need remove it deleting its dependency in BuildConfig.groovy.

The same is for any other app servers(jetty, etc.)

Then, you can just run

grails run-app

and now you have working Grails application under Glassfish app server.

Additional config params

You can specify some config params, if you need it. Each config param should be specified in BuildConfig.groovy file, and should have this semantic:

grails.glassfish.${PARAM_NAME} = ${PARAM_VALUE}

For example, if you want to enable websocket support, you need to specify in BuildConfig.groovy file:

grails.glassfish.websocket = true

For now, available params are:

  • websocket: true or false Let you enable websocket support.

  • comet: true or false Let you enable comet support.

P.S.: if you need some additional params, you can email me on or leave your request in issues.


  • For now, plugin supports only using run-app command. It doesn't support run-war command or using https. If one of this cases is your and you need it to be supported by plugin, email me on or leave your request in issues.

  • When you will run your application, using this plugin, you can see in console some errors, reporting by slf4j. Like this ones:

| Error SLF4J: Class path contains multiple SLF4J bindings.
| Error SLF4J: Found binding in [jar:file:/home/kirach/.grails/ivy-cache/org.slf4j/slf4j-log4j12/jars/slf4j-log4j12-1.6.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]
| Error SLF4J: Found binding in [jar:file:/home/kirach/.grails/ivy-cache/org.glassfish.main.extras/glassfish-embedded-all/jars/glassfish-embedded-all-3.1.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
| Error SLF4J: Found binding in [jar:file:/home/kirach/.grails/ivy-cache/org.grails/grails-plugin-log4j/jars/grails-plugin-log4j-2.0.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
| Error SLF4J: See for an explanation.
| Error SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

It's normal behavior and you can ignore this messages. Glassfish embedded server(this is used by plugin) is distributed with "built-in" slf4j dependencies, and Grails uses same dependencies too(but other versions). That's why this messages appears(signaling about multiples slf4j bindings found). But as a result, slf4j chooses first founded binding and uses it. Plugin is constructed with respect of this behavior.