Migration to GitHub finished

Dear readers,

the migration of the code to GitHub has been finished, you can now access the code here:

https://github.com/lpelov/gwt2go

Migration to GitHub

Since Google is going to close the Google Project Hosting, and the blog posts here are still quite popular, I decide to move the GWT code examples to GitHub. I will let you know once the migration ready.

The Future of GWT–Report

I just read the report about the future of GWT, really good job done by the GWT Steering Committee. You can get your free copy from the report here:

https://vaadin.com/gwt/report-2012

I was actually surprised that there are not a lot of organizations using GWT for building portlets. I personally know several and I was involved to develop GWT Portlets few times as well. I suppose that most of this organizations did not post to the survey or they just select business applications instead of portlets, which I can understand. The portlets are mostly applications for the business side in the organizations. Your usually never sell internally in the organization portlets but business application and the business does not really care what it calls, they want to have the functionality they require and pay.

Later the Committee will post the wish list here:

https://vaadin.com/gwt/report-2012

but I think I can guess that the compiler optimization will be on the first place.

cheers,

Create GWT Project with Spring Roo and Mongo DB using STS – Part 2

Now I will go through the next step and show you how to create the Mongo DB entities. To read the FIRST PART click HERE, to see how to create the project using Spring Roo and STS.

After you create the project you should see something like this:

Using the keyword “hint” in the Roo Shell allows you to see what is the next step. This is really very easy step by step wizard way to work. In my case I will go for the following Roo Command:

mongo setup

which setups the project to use Mongo DB. Inside your Roo Shell you should see something like this:

After you create the project you may get some errors like this one:

Description    Resource    Path    Location    Type
Referenced file contains errors (http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd).  For more information, right click on the message in the Problems View and select "Show Details..."    applicationContext-mongo.xml    /ofers/src/main/resources/META-INF/spring    line 1    XML Problem

To fix this click on the project with right mouse button and then from Maven select Update Project, like this:

This now should update your project and download the needed libraries. After that the error message will disappear.

Next major step is to create the entities. For that reason I create very simple tables, which I will use as domains entities into my project. This is the example.

Just for info, the ID in my table is not something you have to create, the Mongo DB database creates this automatically for every entry in the table. Also what is important to know is the “Reference” means you have Many to One relationship and “Set” means One to Many.

To create the entities using Roo you have to type following lines using the Roo Shell:

For PersonType table:

entity mongo --class ~.domain.PersonType --testAutomatically
field string --fieldName type --sizeMin 128 --notNull

For Person table:

entity mongo --class ~.domain.Person --testAutomatically
field string --fieldName title --sizeMin 16 --notNull
field string --fieldName firstname --sizeMin 128 --notNull
field string --fieldName lastname --sizeMin 128 --notNull
field string --fieldName street --sizeMin 256 --notNull
field number --fieldName plz --type java.lang.Integer
field string --fieldName city --sizeMin 128 --notNull
field string --fieldName email --sizeMin 256 --notNull
field number --fieldName dataofbirth --type java.lang.Integer
field string --fieldName pwd --sizeMin 128 --notNull
field reference --fieldName type --type ~.domain.PersonType

For the layer support:

 

repository mongo --interface ~.repository.PersonTypeRepository --entity ~.domain.PersonType
repository mongo --interface ~.repository.PersonRepository --entity ~.domain.Person

service --interface ~.service.PersonTypeService --entity ~.domain.PersonType
service --interface ~.service.PersonService --entity ~.domain.Person

 

Now you have the Mongo DB entities and you can proceed with the next step (Part 3) of this tutorial, which I will post very soon and which will show how to setup the GWT project.