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Errai To-Do List Demo

This demo app shows how to use the following technologies together:

  • ErraiCDI
  • ErraiJPA (with an early preview of data synchronization)
  • ErraiUI Templates
  • Errai Data Binding
  • Errai Page Navigation
  • Errai Bean Validation

There is a 7-minute screencast of an earlier version of this demo being created.

Try It Out

This demo is designed to work with a full Java EE 6 server such as JBoss EAP 6 or AS 7. Although it should be possible to craft a deployment of this demo to a simpler web server, it's much simpler to deploy to an EE 6 capable app server.


  • Maven 3 (run mvn --version on the command line to check)
  • JBoss AS 7 or EAP 6 running on the local machine
    • With a data source named ErraiTodoDS

To configure the datasource in AS 7 or EAP 6, edit the file standalone/configuration/standalone.xml and add this immediately after the similar entry for ExampleDS:

<datasource jndi-name="java:jboss/datasources/ErraiTodoDS" pool-name="ErraiTodoDS" enabled="true" use-java-context="true">

Of course, you are encouraged to configure the data source to connect to a more permanent database such as PostgreSQL or MySQL instead of H2. With the above "in-memory" configuration, the data you enter into the demo will not survive restarts of the app server.

Build and Deploy

To build a .war file and deploy it to the local running JBoss EAP 6 or AS 7 instance:

% mvn clean package jboss-as:deploy

Once the above command has completed, you should be able to access the app at the following URL:



Configure Development mode to use your JBoss or EAP server by setting the errai.jboss.home property in the pom.xml to the full path to the home directory of the application server.

To try it in GWT's dev mode, after completing the above steps, do this:

% mvn gwt:run

Then click "Launch in Default Browser" on the GWT Dev Mode window that appears.