Posts Tagged ‘Java’

Testing JBoss 6

So, JBoss 6.0.0 is out. And so far it looks pretty good.

Last year I was working on an JEE5 app that runs with Seam 2 and Richfaces 3.3 on JBoss 4.2. Just for fun I tried to deploy it on JBoss 6. To make it deploy cleanly I had to fix some minor things.

1. Only the latest Seam 2.2.1 CR3 is advertised to run on JBoss 6. So I grabbed that.
2. commons-httpclient, which I use in my app, was on my classpath on the JBoss 4.2 I used, but was missing on JBoss 6. But I just grabbed the one from the Seam /lib folder.
3. My app is a .ear file with a .war file inside. And the files have the same name which makes it look something like this when exploded myapp.ear/myapp.war. JBoss 6 doesn’t seem to like this, complaining that the war has already been deployed during the deployment. Renaming the .war to myappweb.war fixed it.

As expected, startup is somewhat slower than JBoss 4.2.3 at around 21 secs to start JBoss 6 with my app deployed and 14 secs on JBoss 4.2.3.

So, to sum up; if I get the chance to do another release of the app and run it on JBoss 6 then, it is definitely possible. And I wouldn’t hesitate to do so. Taking advantage of EJB 3.1 on JBoss 6 to get rid of the silly EJB interfaces would really clean up the app.

Tags: Java, jboss, Seam
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Dependent dropdowns in Seam and Richfaces

It is not uncommon to want to make a combobox with choices that depend on another combobox. But it often seems very complicated to actually do this. So here is a piece of example code that I use with Seam and Richfaces. Imagine we have different vendors Vendors each with different Models of something.

The somewhat large blurb of Richfaces markup is to make two ordinary input textfields feel like two ajaxy comboboxes. It sucks a bit, but on the other hand the Java code is nice and clean.

How do you make dependent gui elements?

xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:rich="http://richfaces.org/rich"
xmlns:a4j="http://richfaces.org/a4j">
<div class="dialog">
Vendor</div>
<div class="dialog">
Model

<br class="clear" /></div>

package test;

import java.util.ArrayList;
import java.util.List;

import javax.ejb.Remove;
import javax.ejb.Stateful;

import org.jboss.labs.seam.guice.Guice;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.log.Log;

import com.google.inject.Inject;

import dk.telenor.tacs.api.DBApi;
import dk.telenor.tacs.db.Model;
import dk.telenor.tacs.db.Vendor;

@Stateful
@Scope(ScopeType.SESSION)
@Name("vendormodelselector")
@Guice
public class VendorModelSelectorBeanImpl implements VendorModelSelectorBean {

@Inject	private DBApi dbApi;

@Out(required = false, value="model")
private Model model = new Model();

@Out(required = false, value="vendor")
private Vendor vendor = new Vendor();

public List autocompleteVendor(){
return dbApi.getMatches(new Vendor());
}

public List autocompleteModel(){
if (vendor == null || vendor.getName() == null) {
return new ArrayList();
}
return dbApi.getMatches( new Model(vendor, null) );
}

public void setVendor(final Vendor vendor){
this.vendor = vendor;
}

public void setModel(final Model Model){
this.model = model;
}

public Model getModel(){
return model;
}

public boolean isReady(){
return model.getId() != null;
}

@Remove
public void destroy(){}
}

Tags: Java, Richfaces, Seam
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Serialize java objects

Tags: Java
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