September 2007 - jboss-user - Jboss List Archives

[JBossCache] - Re: POJO Cache as singleton?

by BruceSpringfield

"jacobeukes" wrote : Hi Bruce. Will it be possible to tell me if you've found a solution to your question ? In my case, there wasn't a need to use a singleton since when the cache is deployed as a service, every time I accessed the cache, I was accessing the Mbean. "jacobeukes" wrote : | I am having a problem which seems related to what you are asking. I want to access a JBossCache instance from several places in the same application, but am unable to do so. | You might try to deploy it as an Mbean service. "jacobeukes" wrote : | I would have thought that JBossCache would have a single instance of the cache and manage it "behind the scenes" .. so that the same cache can be accessed from anywhere in the JVM. | That's my experience with it. "jacobeukes" wrote : | Am I correct in my assumption that this kind of functionality is not supported and that a developer will have to build it in him/herself by using a singleton or some other related solution ? | No. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088866#4088866 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088866

18 years, 7 months

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[Performance Tuning] - Re: JBoss AS Freezes with 99.9% CPU After 1 Hour in Producti

by gudmundsonsc

JAVA_OPTS="-server -Xms512m -Xmx2000m" View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088865#4088865 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088865

18 years, 7 months

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[JBoss Portal] - Re: WARN [JDBCExceptionReporter] SQL Error: 0, SQLState: 01

by rkusetty

Hi Peter, I tried with the another user 'sqlusr@localhost'. I gave all the privileges as below: mysql> GRANT ALL ON *.* TO 'sqlusr@localhost' IDENTIFIED BY 'pwd'; Query OK, 0 rows affected (0.06 sec) But after this also, I am getting the below error at the jboss AS console: 19:32:37,250 INFO [WrapperDataSourceService] Bound ConnectionManager 'jboss.jca:service=DataSourceB inding,name=PortalDS' to JNDI name 'java:PortalDS' 19:32:37,609 WARN [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sq l.SQLException: Access denied for user 'sqlusr'@'localhost' (using password: YES)) Please let me know if you have any solution for this. Thanks, Ramana View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088864#4088864 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088864

18 years, 7 months

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[Persistence, JBoss/CMP, Hibernate, Database] - Problem with hibernate caching?

by DeanoUK

Hi all. I have a problem... I'm trying to retrieve a Survey object from the database which has a one to many mapping onto an object called SurveyQuestion. There are multiple sets of SurveyQuestions based on locale for each Survey. Thus I am trying to do this: | List<Survey> surveys = entityManager.createQuery("SELECT DISTINCT s FROM " + Survey.class.getSimpleName() + " s LEFT JOIN FETCH s.surveyQuestions q WHERE q.locale = '" + locale + "'").getResultList(); | In an attempt to get back a Survey object which has a set of questions for the given locale. I do this twice within the same loop, for locale of 'fr' and 'en'. Both Survey objects contain the 'fr' SurveyQuestions not 'fr' and 'en'. Am I doing something wrong, or is this some kind of caching problem? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088863#4088863 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088863

18 years, 7 months

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[Performance Tuning] - Re: Monitoring and managing clustered servers

by wingkwan

Thinking to use AOP to store info in MBeans. Or provide inline code to collect counters. But the key question is how to aggregate counters across server nodes. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088862#4088862 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088862

18 years, 7 months

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[JBoss Seam] - Re: How can I pass parameters to action methods

by cupdike

"christian.bauer(a)jboss.com" wrote : So you need to find another way to pass an "object" from request to request. One way is to pass its identifier and to load it from the database in the second request. Another is to stick it into the session an retrieve it from there by identifier. But the booking app does pass the object as a parameter [from main.xhtml]: <h:dataTable id="hotels" value="#{hotels}" var="hot" rendered="#{hotels.rowCount>0}"> | ... | <s:link id="viewHotel" value="View Hotel" action="#{hotelBooking.selectHotel(hot)}"/> The only reason I can guess why this works is that the hotels DataModel property is outjected from a session-scoped SFSB. However, I read in one of Dan Allen's articles on IBM that anonymous wrote : Outjected variables are placed directly into the variable context, independent of their backing bean. So this suggests that it shouldn't matter. Continuing... "christian.bauer(a)jboss.com" wrote : And the last and best way is to put it into the conversation context in the first request, name the context variable in the action method as a parameter, and let Seam look it up from the conversation context in the second request. This is really what Seam is about. Doesn't it depend on what the bounds of the conversation are? According to the Yuan/Heute book, anonymous wrote : The default conversation scope spans only two pages However, I find this statement a bit misleading. If you read further, it suggests that is really a single request/response cycle. And wouldn't this then explain why trying to pass the object using default conversation scope doesn't work? But then how does it work in the booking app, unless the scope of the component outjecting the property has some influence on the lifecycle of the outjected property. Clearly I'm missing something I need to know about how all this works. Please someone explain. TIA, Clark View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088861#4088861 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088861

18 years, 7 months

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[JBossCache] - Re: Cache not accessible from different methods ?

by BruceSpringfield

I couldn't reproduce your error. But I have POJO Cache deployed as an Mbean service on the JBoss server. When I run your test, the object is returned. If you are deploying the cache from a jar file within a web application, I'm not sure what the results would be. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088860#4088860 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088860

18 years, 7 months

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[Installation, Configuration & DEPLOYMENT] - Re: java.lang.OutOfMemoryError: PermGen space

by konstandinos

Hi Since I posted this, I have done some research. Our server has 1gb of ram. I am now using the following JVM options: -XX:MaxPermSize=128m -Xmx512m The defaults were 64mb for both. So far things seem to be running smoothly. I am keeping an eye on memory usage with 'top'. Question: is a gig of ram enough? Take into consideration that we are using JBoss AS 4.2.1, JBoss Portal 2.6.1, and JBoss Forums and Wiki portlets. We plan on having around 200 to 1000 users. How much memory should we be looking at for our needs? Any other scalability issues I should keep in mind? Cheers, View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088856#4088856 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088856

18 years, 7 months

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[Clustering/JBoss] - Re: Problem with Apache loadbalancer, j_security_check and J

by bstansberry＠jboss.com

You have to use sticky sessions. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088854#4088854 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088854

18 years, 7 months

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[JBoss Messaging] - Re: Ping failed when using MySQL as database backend for JBo

by boniek

Yup. But the problem is database is up :) This problem seems to be related to Mysql JDBC driver and not to JBM directly though. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088852#4088852 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088852

18 years, 7 months

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jboss-user September 2007