Posts

Posted on

NoSuchMethodErrror StringUtils.isBlank() when deploying Grails WAR to JBoss 4.0.1

Deploying a Grails 0.1 WAR to JBoss 4.0.1 I get this exception:

<code>
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'grailsApplication' defined
in ServletContext resource [/WEB-INF/applicationContext.xml]: 
Initialization of bean failed; nested exception is java.lang.NoSuchMethodError: 
org.apache.commons.lang.StringUtils.isBlank(Ljava/lang/String;)Z
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:370)
	org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:226)
	org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)
	org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:269)
	org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:320)
	org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:134)
	org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
	org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)
	org.springframework.web.context.ContextLoaderServlet.init(ContextLoaderServlet.java:83)
	javax.servlet.GenericServlet.init(GenericServlet.java:211)
</code>

This seems to be a Commons Lang jar issue, and does not occur if deploying Grails web apps to JBoss 4.0.4+

Update: This is an issue with the JBoss Unified ClassLoader when deploying to a JBoss server with other webapps including other possibly different versions of the same jars. The solution is to disable the Unified ClassLoader.

Disabling the use of the JBoss Unified Class Loader in this file:

/jboss/server/default/deploy/jbossweb-tomcat50.sar/jboss-service.xml

changing this line:

<code>
&lt;attribute name="UseJBossWebLoader"&gt;true&lt;/attribute&gt;
</code>

to

<code>
&lt;attribute name="UseJBossWebLoader"&gt;false&lt;/attribute&gt;
</code>
Posted on

New Hibernate book on the way from the Hibernate team

Christian Bauer has an update on the Hibernate blog about the status on the second edition of the Hibernate in Action book. Apparently there has been so much additional material added to the book that they’re changing the name to ‘Java Persistence with Hibernate’.

The new book will cover Hibernate 3.0 features in addition to Java Persistence API features (EJB3.0 Entities).

Can;t wait to get a copy of this one, as HiA in my opinion was and still is the best Hibernate book published.

Posted on

OnJava.com: Telling Stories at JavaOne

Daniel Steinberg has an interesing account of the Key Notes from JavaOne this year – he mentions in his article that they were lacking the ‘rally the troups’ enthusiasm from prior years. Was it that they were missing the McNealy-style jokes with his always anticipated Microsoft bashing?

I ony got to attend one day this year on Wednesday, and I admit the keynotes were a little bland. The BEA afternoon session was more of a corporate invester conference call than typical conference Key Note material. I had to leave early to get a train, but from what I saw, there wasn’t anything that got me that excited.

I can see Stenberg’s point. The last JavaOne I attented was 2001, and after every Key Note you left feeling so pumped up about Java that you wanted to race out of the hall and start coding! There was definitely less of that enthusiasm this year.

However, the emphasis seemed to have shifted out to the sessions themselves – the sessions I attended did make me feel ‘wow – that was awesome!’ each time they completed, and I am definitely fired up about new technologies such as EJB3.0 and Groovy, even though I had already been working with both prior to the conference. There still is definitely something very refreshing and invigorating about attending tech conferences – you leave feeling energized and empowered with new technologies and skills – and then get back to the real project world and realise – ‘oh, we’re still using J2EE 1.3’ … 🙂

Posted on

Side by side comparison of level of animation details possible in PS3 vs PS2

This is a video on the Fosfor Gadgets website of a Sony/EA presentation showing the level of detail possible in animating game characters on the PS3.

What is amazing is whereas before to get an ingame character on the PS2 to respond to events happening in space around the character and turn to look at that event such as a ball in a basketball game it is obvious from the video that the developers had a number of different versions of the character and would switch between the graphic animations, eg for one for each point of the compass and maybe one inbetween each point. Now on the PS3 they have enough horse power to animate to turn and respond to something happening 360 degrees around the character, without having to swtich between different animation sets of images (or if they do it is completely seamless).

The level of detail in the basketball character as he moves is also quite amazing. They point out in the video before on the PS2 most of the time foot movements are not truely animated, but the character’s feet tend to slide across the floor, for example as he turns on the spot. Now on the PS3 his feet movements can be truely animated as if the character is walking and turning, and it looks very realistic.

What I also noticed is the physics details in the players body movement – his arms don’t just raise up and down – as they come down to his side you get the impression of weight as they move, and as he turns it is obvious his arms have weight and are affected by the movement of his body. Quite amazing.

I don;t know if this is a technical demo or in game action (they said it was live and being demo’d on a PS3), but it really is amazing.

Proudly powered by WordPress