SQL Select to Web Application in a Couple of Seconds
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The key ingredients for this recipe are: Openxava, Liferay and ... Minuteproject.
The equation is:
sql select statement (containing one field considered as unique) = Openxava (Webapp) + Liferay (Portlet)
in less than 5 minutes.
- Download Openxava (4.2.2), Liferay, Minuteproject (0.5.7.1+)
- Set environment variables OX_HOME and MP_HOME to Openxava and Minuteproject home directories respectively.
- Use Java 6
- Create a sql select statement
- Ensure that one of the return field can be considered as unique (if not add one)
- Create a view from your statement
- Ex: CREATE VIEW abc as
Why is it necessary to have a unique field?
It is to ensure that MP can place a @Id JPA2 annotation on one field of the generated entity.
It has to be unique to avoid issue dealing with first level cache.
Start Minuteproject console
- Point to your model and fill your model name (ex: efg)
- select your view abc (in customisation tab)
- add the unique field as 'virtual' primary key. Your unique field is not a PK but it will acts as to uniquely identify a record entry.
- Choose target openxava and click generate.
- go to the generated code
- check environment variables (OX_HOME, MP_HOME) are set.
- execute from a command prompt: build-efg.cmd/sh
- depending on the OS from couple of seconds to a dozen of seconds and a browser should open to the address http://localhost:8080/egf/xava/homeMenu.jsp
- go to OX_HOME/workspace.dist/efg.dist/efg.war
- add ejb.jar and jdbc driver jar in LIFERAY_HOME/tomcat/lib
- start Liferay
- Upload your portlet
- Install your portlet
Whether on the standalone tomcat app or on the Liferay deployed portlet, Openxava is only offering the user selection. It is normal since the DB object is a view, Minuteproject 4 Openxava suppress the Create/Update/Delete, just the Select functionality is kept.
As model I take the lazuly model project in version 0.1 it contains 13 tables.
The sql to create the schema on mysql can be downloaded at http://code.google.com/p/lazuly/source/browse/trunk/conference-db/conference-db-mysql-0.1.sql
Create your view from your sql select statement
Start MinuteProject console
Scope your model
Choose your technology: here Openxava, and click on Generate.
The code will be generated in MP_HOME/output/conference/OpenXava
Make a standalone Openxava app
Go to the generated code
Open a prompt
Check or set OX_HOME and MP_HOME
Couple of seconds later a browser should open to the model (conference) menu.
Report tab has one entry 'my conference cool report'.
When clicking on it here is a sample screen with data that you could see:
Deploy on Liferay
- Add the datasource (the snippet for tomcat is in OX_HOME/workspace/conference/OpenXava/openxava/other/tomcat/snippet/conference_jndi_for_tomcat_snippet.txt is to be inserted into LIFERAY_HOME/tomcat/conf/context.xml)
- Upload the portlet war (OX_HOME/workspace.dist/conference.dist/conference.war
- Position it
You can also find other information regarding Minuteproject 4 Openxava generation at
- Your model is your technology tutorial
- Productivity can be greatly improved
- Data Quality and troubleshooting operations are quickly available
- Keep on improving send feed-back to firstname.lastname@example.org or tweet @minuteproject
Published at DZone with permission of Florian Adler, DZone MVB. See the original article here.
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