RE: [JBoss-user] Auto-increment(revisited) : read on jGuru.
Assuming the auto-id is your primary key, what would you use as the entity bean's primary key? Frank T. Villarreal, Jr. Email [EMAIL PROTECTED] -Original Message-From: Hermann RANGAMANA [mailto:[EMAIL PROTECTED]]Sent: Thursday, July 26, 2001 9:32 AMTo: [EMAIL PROTECTED]Subject: [JBoss-user] Auto-increment(revisited) : read on jGuru. Hi all, while we all in this list have debated about the best way to have an Autoincrement-like feature in our EJB (using AutoNumber bean, using a singleton session bean to retrieve the newly created id in the db, etc.), i've just came through a text at jGuru - in FAQ section about EJB - about a fairly simple way to handle auto-incr with CMP. I'd just like want to know if anyone has tested the suggested method, and if it works correctly with jBoss Any comment would be higly appreciated. --hermann From jGuru : Question How does Container Managed Persistence work with automatically generated database ID fields? Should I map the ID field explicitly or leave it unspecified? Answer In the Deployment Descriptor, map the normal fields appropriately, but don't specify the auto-id field as one of the container managed fields. Link : http://www.jguru.com/faq/view.jsp?EID=33146
RE: [JBoss-user] ejbLoad not called even when commit-option is C
Luke, search the previous posts for the following topic HOW TO DISABLE ENTITY-BEAN CACHING. You can read about the steps I had to take in order to eliminate caching with option-C. I still think setting the container to option-C alone should have disabled caching...does anyone know if there is a bug with the LRUCachingPolicy? Frank T. Villarreal, Jr. Email [EMAIL PROTECTED] -Original Message- From: Luke Studley [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 19, 2001 7:35 AM To: '[EMAIL PROTECTED]' Subject: Re: [JBoss-user] ejbLoad not called even when commit-option is C Hello I think this relates exactly to the same problem I am having, see my post from about 18 hours ago below. When I went back to read the ejb1.1. spec it seems to suggest that there are 3 different ways a container may behave between transactional calls on a bean (see mail below), it appears to me that JBoss is taking option A, which is allowable, but not very useful for what I want to achieve (i.e. dB access from without the bean). I am hoping that somebody will rubbish my conclusions and tell me how we can make JBoss call ejbLoad at the beginning of each transactional set of calls. If you find any solution to this please do post it. Best of luck Luke ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] CommunicationException in JSP to EJB communicati on
Felix,
I believe this is a Tomcat bug. Tomcat seems unable to locate EJBs unless
you put a copy of your application jars and the JBoss client jars in the
$TOMCAT_HOME/lib directory as well as your app's directory. At least this
is what I found after much digging in various mailing lists. Hope that
helps!
Frank T. Villarreal, Jr.
-Original Message-
From: Felix Munoz [mailto:[EMAIL PROTECTED]]
Sent: Monday, June 25, 2001 4:27 PM
To: '[EMAIL PROTECTED]'
Subject: RE: [JBoss-user] CommunicationException in JSP to EJB
communicati on
Fred:
Sorry about that. Actually, the JNDI name PersonBean is
bound correctly.
The file breakdown is simplified... Your suggestion is a good
one. However,
I am concerned I will get the same error if I deal with a Session bean
instead than with an Entity bean. For some reason, if I add the
ClientJAR.jar to the Tomcat lib directory everything works fine...
Felix
-Original Message-
From: Fred Loney [mailto:[EMAIL PROTECTED]]
Sent: Monday, June 25, 2001 4:04 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: [JBoss-user] CommunicationException in JSP to EJB
communication
The jndi name PersonBean is bound to a
com.munoz.concept.person.PersonHome
rather than a com.munoz.ejb.person.PersonHome. Perhaps a
build problem?
It is preferable to insulate JSP from EJB. Wrap the Entity
EJB calls in a
Session EJB. Wrap the Session EJB in a bean. Call the bean
from the JSP.
Remove the EJB classes from the war. Cf. Sun J2EE blueprints
for examples.
--
Fred Loney
Enterprise Java Consultant
Spirited Software, Inc.
[EMAIL PROTECTED]
Felix Munoz wrote:
Hi:
I have been trying to implement a simple JSP to EJB
communication test
from
an EAR file deployed on JBoss/Tomcat but I have been unsuccessful.
This is the EAR file breakdown:
TestEAR.ear
application.xml
TestWAR.war
WEB-INF
lib
ClientJAR.jar
com
munoz
ejb
Person.class
PersonBean.class
PersonHome.class
web.xml
ejbTest.jsp
TestJAR.jar
META-INF
ejb-jar.xml
com
munoz
ejb
Person.class
PersonBean.class
PersonHome.class
In the JSP I am making the following call:
Context initialContext = new InitialContext();
Object personHome = null;
try
{
personHome = initialContext.lookup(PersonBean);
if (personHome == null)
{
out.println(PersonHome is null);
}
else
{
out.println(Success!);
}
}
catch (Exception exception)
{
System.out.println(exception);
out.println(exception);
exception.printStackTrace(System.out);
}
The page compiles correctly, but when I call it, I get back
the following
exception:
[EmbeddedTomcat] javax.naming.CommunicationException [Root
exception is
java.lang.ClassNotFoundException:
com.munoz.concept.person.PersonHome]
javax.naming.CommunicationException. Root exception is
[EmbeddedTomcat]
java.lang.ClassNotFoundException:
com.munoz.concept.person.PersonHome
[EmbeddedTomcat]at
javax.management.loading.MLet.findClass(MLet.java:800)
[EmbeddedTomcat]at
java.lang.ClassLoader.loadClass(Unknown Source)
[EmbeddedTomcat]at
java.lang.ClassLoader.loadClass(Unknown Source)
[EmbeddedTomcat]at
java.lang.ClassLoader.loadClassInternal(Unknown
Source)
[EmbeddedTomcat]at java.lang.Class.forName0(Native Method)
[EmbeddedTomcat]at java.lang.Class.forName(Unknown Source)
[EmbeddedTomcat]at
sun.rmi.server.MarshalInputStream.resolveProxyClass(Unknown Source)
[EmbeddedTomcat]at
java.io.ObjectInputStream.inputProxyClassDescriptor(Unknown Source)
[EmbeddedTomcat]at
java.io.ObjectInputStream.readObject(Unknown
Source)
[EmbeddedTomcat]at
java.io.ObjectInputStream.readObject(Unknown
Source)
[EmbeddedTomcat]at
java.io.ObjectInputStream.inputObject(Unknown
Source)
[EmbeddedTomcat]at
java.io.ObjectInputStream.readObject(Unknown
Source)
[EmbeddedTomcat]at
java.io.ObjectInputStream.readObject(Unknown
Source)
[EmbeddedTomcat]at
java.rmi.MarshalledObject.get(Unknown Source)
[EmbeddedTomcat]at
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:299)
[EmbeddedTomcat]at
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:279)
[EmbeddedTomcat]at
javax.naming.InitialContext.lookup(Unknown
Source)
[EmbeddedTomcat]at
RE: [JBoss-user] HOW TO DISABLE ENTITY-BEAN CACHING?
Thanks Burkhard! I changed all every setting in the cache-policy-conf to 1 (except for cache-load-factor...I left it at 0.75) and my beans are now being refreshed (close-to-real-time). I know this will be bad performance, but I get the desired effect for integrating a J2EE application with a VB application. What's curious is that simply setting commit-option to 'C' did not work. By definition, I thought that would bypass caching for my CMP-entity bean. The definition for option 'C' states: Option C: The container does not cache bean instances and instances memory state is synchronized on every transaction start (via ejbLoad). For business methods executing outside a transaction the synchronization is done too, but as the ejbLoad executes in the same transaction context as the triggering business method, the state must still be considered invalid and might already have changed in the persistent storage when the business method executes. I'm using the LRUEnterpriseContextCachePolicy and I also set all my session-bean cache parameters equal to 1. Just a heads up for anyone else out there thinking about doing something like this. -Frank -Original Message- From: Burkhard Vogel [mailto:[EMAIL PROTECTED]] Sent: Monday, June 18, 2001 10:52 AM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] HOW TO DISABLE ENTITY-BEAN CACHING? Use 1. - Original Message - From: Frank Villarreal [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, June 15, 2001 4:52 PM Subject: RE: [JBoss-user] HOW TO DISABLE ENTITY-BEAN CACHING? K.V. Vinay Menon [mailto:[EMAIL PROTECTED]] wrote : For what its worth did you try changing the following section in standardjboss.xml cache-policy-conf min-capacity50/min-capacity max-capacity1000/max-capacity overager-period300/overager-period max-bean-age600/max-bean-age resizer-period400/resizer-period max-cache-miss-period60/max-cache-miss-period min-cache-miss-period1/min-cache-miss-period cache-load-factor0.75/cache-load-factor /cache-policy-conf to set min/max-capacity to 0? Vinay Thanks Vinay, but I tried setting the min/max capacity to 0 and it resulted in the following jboss startup exception... exception [Container factory] org.jboss.ejb.DeploymentException: Can't import policy configuration, Cause:org.jboss.ejb.DeploymentException: Min cache capacity can't be = 0 [Container factory] at org.jboss.ejb.plugins.AbstractInstanceCache.importXml(Abstract InstanceCache. java:311) [Container factory] at org.jboss.ejb.ContainerFactory.createInstanceCache(ContainerFa ctory.java:762 ) [Container factory] /exception Any other ideas? - Frank ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] HOW TO DISABLE ENTITY-BEAN CACHING?
Hello all. I was wondering if someone can give me a hand. I temporarily need to disable all entity-bean caching in JBoss. Is this possible? My problem is that I have an external application that is updating my entity-bean tables (I will eventually eliminate that, but for now I have no choice in the matter) and I want my beans to show the most current data from the operational store. So far, I have modified standardjboss.xml and set the commit-option tags to option C ... which seems like a fit. However, after making a change to a database record and accessing the corresponding entity-bean, the bean still contains the old data (apparently it is cached in memory). Am I going insane or am I missing some configuration somewhere? Any help is appreciated! - Frank Villarreal ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] xalan 'n' stuff
How about in the WEB-INF/classes or WEB-INF/lib directory of your web-application? - Frank Villarreal -Original Message- From: Timo Kauppinen [mailto:[EMAIL PROTECTED]] Sent: Friday, June 15, 2001 7:09 AM To: [EMAIL PROTECTED] Subject: [JBoss-user] xalan 'n' stuff Hello! I know this may be a common problem (or maybe not). At least I think I have seen this thing discussed here.. but I ask it anyway: If I want to use xalan as the xsl-parser in my servlet (I'm using Jboss-2.2.2 with tomcat), where should I put the xalan.jar? Tomcat can't find the needed classes if I put it in [inst-dir]/tomcat/lib and [inst-dir]/jboss/lib/ext doesnt't work either. I thought that it wouldn't do in the starting classpath either (in run_with_tomcat.bat). So if those options don't work, I'm a little out of ideas. Can anyone give suggestions? Cheers! Timo ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] HOW TO DISABLE ENTITY-BEAN CACHING?
K.V. Vinay Menon [mailto:[EMAIL PROTECTED]] wrote : For what its worth did you try changing the following section in standardjboss.xml cache-policy-conf min-capacity50/min-capacity max-capacity1000/max-capacity overager-period300/overager-period max-bean-age600/max-bean-age resizer-period400/resizer-period max-cache-miss-period60/max-cache-miss-period min-cache-miss-period1/min-cache-miss-period cache-load-factor0.75/cache-load-factor /cache-policy-conf to set min/max-capacity to 0? Vinay Thanks Vinay, but I tried setting the min/max capacity to 0 and it resulted in the following jboss startup exception... exception [Container factory] org.jboss.ejb.DeploymentException: Can't import policy configuration, Cause:org.jboss.ejb.DeploymentException: Min cache capacity can't be = 0 [Container factory] at org.jboss.ejb.plugins.AbstractInstanceCache.importXml(AbstractInstanceCache. java:311) [Container factory] at org.jboss.ejb.ContainerFactory.createInstanceCache(ContainerFactory.java:762 ) [Container factory] /exception Any other ideas? - Frank ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] HOW TO DISABLE ENTITY-BEAN CACHING ???
Hello all. I was wondering if someone can give me a hand. I temporarily need to disable all entity-bean caching in JBoss. Is this possible? My problem is that I have an external application that is updating my entity-bean tables (I will eventually eliminate that, but for now I have no choice in the matter) and I want my beans to show the most current data from the operational store. So far, I have modified standardjboss.xml and set the commit-option tags to option C ... which seems like a fit. However, after making a change to a database record and accessing the corresponding entity-bean, the bean still contains the old data (apparently it is cached in memory). Am I going insane or am I missing some configuration somewhere? Any help is appreciated! - Frank Villarreal ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] primary key problem
Check out this discussion thread on the Server Side: http://theserverside.com/patterns/thread.jsp?thread_id=4228 it contains a boat-load of information/ideas on how to create unique id's for EJBs. Hope it helps! - Frank -Original Message- From: Cumps Jef [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 16, 2001 1:37 PM To: [EMAIL PROTECTED] Subject: [JBoss-user] primary key problem Hi all, i have a problem and some solutions, but i don't know which one's the best: I have some entity beans working with MS SQL Server. When i undeploy my application the tables are not destoyed and i don't want them to. The problem is that i want to work with an int as Primary Key for those entity beans. That int should be auto-increasing if you get what i mean. Every new row in the database should get the next number. I cannot work with a static int in my bean because when i re-deploy it, it will restart counting from 0 and that row would already exist. I could make a database acces in every create method to check which the last PK in the database was, but i've got the feeling there's a better solution. Is there a standard way to work here, or not. What would be the best solution ?? Any possibility to make SQL Server do the job itself ?? any help, tips or examples would be really appreciated. thanx in advance, jef ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss newbie needs help with installation!
I lied. I must have openned the run.sh script when I was trying to debug it and placed a carriage return or something in there. I made a new copy of run.sh from the download and now JBoss+tomcat starts up just fine. -Frank -Original Message- From: Frank Villarreal [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 15, 2001 12:20 PM To: [EMAIL PROTECTED] Subject: [JBoss-user] JBoss newbie needs help with installation! Hello all! I have installed Jboss 2.0 standalone successfully before, but now I have installed Jboss2.2.1 w/tomcat and receive the following error when I attempt startup: cd /usr/jboss-tomcat/jboss/bin /bin/sh run_with_tomcat.sh JBOSS_CLASSPATH=run.jar:../crimson.jar:/usr/jdk1.3.0_02/lib/tools.jar EXCEPTION in thread main java.io.IOException: jboss.properties missing at org.jboss.Main.main(Main.java:66) I know the jboss.properties file is in the right place and present. I have not modified the package downloaded directly from jboss.org. Has anyone seen this before? Can someone please point me in the right direction? Thanks in advance! -Frank PS: Outstanding work JBOSS coders, the product seems to really be evolving rapidly! ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
