Goal: Use Spring Roo - GWT - GAE to create a Pokemon website for my son

[dclaverty]

Here is the idea

My son has a thousand Pokemon cards. Too many to manage and know what he has. His favourites go to school with him every day whether rain or shine, and not long after they have gone from good condition to falling apart. I would like to put a Website together from him to upload his card information to not only sort through himself, but share with his friends.

Here are my initial requirements

• Use GWT for UI
• Run on Google App Engine
• Be able to input the attributes of the card, such as pokemon name, artist, stage, HP etc. My son is the domain expert here, so I will have to go to him to understand the complexities of the card.
• Upload a picture of the card
• Search for cards based on attributes

After I have my son's cards online

• I would like to create a user repository for his friends to sign on, upload and share their cards

I thought it would be helpful for not only me, but he Spring Roo community to document my attempt here.

Here we go...

[dclaverty]

Here is my toolset

STS 3.1.0
Apache Maven 3.0.4 (r1232337; 2012-01-17 03:44:56-0500)
java version "1.6.0_35"
Roo 1.2.2.RELEASE [rev 7d75659]

[dclaverty]

project --topLevelPackage com.maxcardtrader

persistence setup --provider DATANUCLEUS --database GOOGLE_APP_ENGINE --applicationId maxcardtrader

entity jpa --class ~.server.domain.Card
field string --fieldName name --sizeMin 3 --sizeMax 30 --notNull

web gwt setup
web gwt all --proxyPackage ~.client.proxy --requestPackage ~.client.request

logging setup --level DEBUG

[dclaverty]

Started roo, executed the script. Everything seemed to run fine. -Issue open, but has workaround-

exited roo and ran
mvn gae:run

error occurred

[INFO] Total time: 9.297s
[INFO] Finished at: Sat Dec 08 14:57:00 EST 2012
[INFO] Final Memory: 9M/22M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.datanucleus:maven-datanucleus-plugin:3.0.2:en
hance (default) on project maxcardtrader: Error executing DataNucleus tool org.d
atanucleus.enhancer.DataNucleusEnhancer: InvocationTargetException: Plugin (Bund
le) "org.datanucleus.enhancer" is already registered. Ensure you dont have multi
ple JAR versions of the same plugin in the classpath. The URL "file:/C:/Document
s%20and%20Settings/lavercr/.m2/repository/org/datanucleus/datanucleus-enhancer/3
.0.1/datanucleus-enhancer-3.0.1.jar" is already registered, and you are trying t
o register an identical plugin located at URL "file:/C:/Documents%20and%20Settin
gs/lavercr/.m2/repository/org/datanucleus/datanucleus-enhancer/3.1.0-m2/datanucl
eus-enhancer-3.1.0-m2.jar." -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/d...MojoExecutionE
xception

Seems to be around the datanucleus maven plugin

[dclaverty]

Here is my pom.xml without any attempt to fix the datanucleus error

pom.zip

[dclaverty]

Partially RESOLVED

found this link

http://stackoverflow.com/questions/1...ith-spring-roo

adding

<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
<version>3.1.0-m2</version>
</dependency>

seems to resolve the datanucleus error

[dclaverty]

After fixing the datanucleus issue I ran mvn gae:run again

I saw this in the console

[INFO] --- gwt-maven-plugin:2.2.0:compile (gwtcompile) @ maxcardtrader ---
[INFO] Compiling module com.maxcardtrader.ApplicationScaffold
[INFO] Compiling 12 permutations
[INFO] Compiling permutation 0...
[INFO] Process output
[INFO] Error occurred during initialization of VM
[INFO] agent library failed to init: instrument
[INFO] [ERROR] Error opening zip file or JAR manifest missing : C:\Docu
ments
[INFO] Compiling permutation 2...
[INFO] Compiling permutation 3...

do I need to be concerned about the ERROR or is this expected ?

[dclaverty]

interesting

It went back and compiled 1 again

[INFO] Compiling permutation 11...
[INFO] Compiling permutation 1...

[andy]

Why would you change the version of the enhancer to something that is a milestone when there were many others released after that?
If using GAE JDO/JPA plugin v2.0.x then you use datanucleus-enhancer v3.0.1 and maven-datanucleus-plugin v3.0.2
If using GAE JDO/JPA plugin v2.1.x then you use datanucleus-enhancer v3.1.1 and maven-datanucleus-plugin v3.1.3
as per all docs for DataNucleus and the GAE JDO/JPA plugin

[dclaverty]

I am relying on the Roo 1.2.2 release to put the pom together correctly. I am trying to stay as close to the offering as possible without making drastic changes. The datanucleus error I was given referred to the milestone release 3.1.0-m2 as seen below, so it seemed to make to most sense to get that working.

[ERROR] Failed to execute goal org.datanucleus:maven-datanucleus-plugin:3.0.2:en
hance (default) on project maxcardtrader: Error executing DataNucleus tool org.d
atanucleus.enhancer.DataNucleusEnhancer: InvocationTargetException: Plugin (Bund
le) "org.datanucleus.enhancer" is already registered. Ensure you dont have multi
ple JAR versions of the same plugin in the classpath. The URL "file:/C:/Document
s%20and%20Settings/lavercr/.m2/repository/org/datanucleus/datanucleus-enhancer/3
.0.1/datanucleus-enhancer-3.0.1.jar" is already registered, and you are trying t
o register an identical plugin located at URL "file:/C:/Documents%20and%20Settin
gs/lavercr/.m2/repository/org/datanucleus/datanucleus-enhancer/3.1.0-m2/datanucl
eus-enhancer-3.1.0-m2.jar." -> [Help 1]