January 2008 - jboss-dev-forums - Jboss List Archives

[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Tests pass but MINA throwing exceptions

by jmesnil

I fixed the problem in r3544: I let MINA IoService take care of its lifecycle without destroying directly the ExcutorFilters View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117938#4117938 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117938

18 years, 2 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBM 2.0 JDBCPersistenceManager - volunteers?

by timfox

Just to clarify - we're not considering using HIbernate for our primary persistence mechanism. We're considering using Hibernate to implement our JDBC PersistenceManager. Primary form of persistence is a fast file based append only journalling approach. The JDBCPersistenceManager is mainly so JBM can work out of the box with JBAS and the default database, and for those customers that really want JDBC but do so understanding performance will be much poorer. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117929#4117929 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117929

18 years, 2 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBM 2.0 JDBCPersistenceManager - volunteers?

by cbredesen

anonymous wrote : Hibernate is a good abstraction, but it can be a bit leaky By "leaky" I mean "leaky abstraction", not "memory leak". Although we've had our share of the latter too :) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117927#4117927 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117927

18 years, 2 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBM 2.0 JDBCPersistenceManager - volunteers?

by cbredesen

I agree with Anthony's assessment that using Hibernate as nothing more than a portability tool is the wrong approach. It will certainly work, and likely work well, but we have to consider the support issues going forward when a JMS application suddenly becomes a JMS + Hibernate one. Hibernate is a good abstraction, but it can be a bit leaky when it becomes a fundamental layer of the appserver. We see this today with jBPM. While you'd win in terms of ease of portability across RDBMSs, you'd potentially lose with extra complexity for JBM. I'd have to look more at how JBM does persistence today to see what opportunities there are for improvement besides using Hibernate. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117925#4117925 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117925

18 years, 2 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBM 2.0 JDBCPersistenceManager - volunteers?

by AnthonyHib

Christian advices not to use the stateless session (Hibernate session with first level cache disabled). I really think we should bench the 2 or 3 options we have. How many tables are you using? How many joins in the queries? Will you have concurrent access?... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117919#4117919 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117919

18 years, 2 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBM 2.0 JDBCPersistenceManager - volunteers?

by AnthonyHib

well you hit 2 distinct things: 1- DDL, mainly used by Schema Export --> see my previous comment. SchemaExport uses hibernate metadatas to generate a schema creation script. (FYI metadatas is the place where you say my class Person is mapped to the PERSON table or, in your case, the PERSON table is mapped to the entity name "Person" if you don't have a real class) 2- DML. With Hibernate, you use HQL (or JPA QL), it's OO based on class and property names (associations, collections, basic properties). 2-a, if you use dynamic models, you'll have to define aliases (entity-name) instead of using class and property names). Then, in your java code, when querying, you'll use theses aliases. The HQL query will be translated in SQL 2-b if you don't like the generated SQL, if you want to tune it, you'll have to use the SQL query feature which is very close to pure JDBC... 3- about caching, you can disable all the caches. I must admit that this is a very specific usage of hibernate, I'm pinging the core Hibernate guys to get their feelings. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117911#4117911 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117911

18 years, 2 months

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[Design of JBoss jBPM] - Re: How to add custom node?

by tom.baeyens＠jboss.com

in jbpm.3 there is a read method in the node so that the node implementation also can parse custom attributes. i don't know whether all things are configurable enough to get it going without recompilation. that probably is the case, but i'm not sure. see the jPDL node type implementations for examples on how to implement that extra node parsing. we currently working towards jpdl 4 where this node pluggability is fully worked out from designer to xml over node implementation to persistence. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117906#4117906 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117906

18 years, 2 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBM 2.0 JDBCPersistenceManager - volunteers?

by apwalker

anonymous wrote : Anthony | | 1- Using Hibernate/JPA just because Schema Export is useful isn't a sufficient argument. Schema Export is a development tool. Generated Schemas need to be reviewed/tuned by a DBA, so you cannot rely 110% on it in production | Correct you most creatainly need way to generate scripts that can be reviewed by DBA for going into production. With previous versions of JBossMQ and JBM I would run the app server configured with a DB user with create premissions in a dev/test environment have if create the tables etc the use a tools to extract the DDL so it can be used to create the prod environment. This is always a pain. How I saw this work was that I could simply run a script that would generate the correct DDL from some hiberante config. Now whether we then just use pure JDBC or Hibernate at run time is a seperate issue. JBPM does this quite nicely in that the have a seperate DB project which you to create DDL for both new systems and when upgrading to new versions (alter scripts). anonymous wrote : Tim | | However, maybe I am mistaken / misinformed and such an API does not exist, in which case I imagine we need to go down the ORM route. If this is the case I would like to know if HIbernate can be configured to not cache - basically just act as a raw "translator". | Hibernate has the concept of a stateless session which is means no session level caching. I spoke to Gavin sometime ago about using Hibernate for persitance for the JBM project and he said it really was a good fit but if we did go down this path then use the stateless session. The persisntance requirements for messaging are pretty simple and I think itÃÂ´s possible to tune a pure JDBC solution and that ORM is overkill for runtime. I think it would be a good idea to try a couple of prototypes I happy to work on one or two of them. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117902#4117902 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117902

18 years, 2 months

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[Design of JBoss jBPM] - Re: How to add custom node?

by anas

I appreciate your effort for answering me,,, I checked the the node type in 9.3.7,,, but my case is that i want to add a custom attributes to the class node itself,, in other words,, node class contains id as long,, and i want to add a type of node that contain myId as int,, and get its value from the processdefinition.xml,, i.e: <process-definition name="simple"> <custom-node myId="5"> ...... </custom-node> </process-definition> is there any solution,, or i have to rebuild the jpdl in order to do that?? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117888#4117888 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117888

18 years, 2 months

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[Design the new POJO MicroContainer] - Re: NoCopyNestedJarHandler usage

by alesj

"scott.stark(a)jboss.org" wrote : The testULRClassloading and testURLClassLoader work with the proper classpath for the no copy case. When adding tests for ?useNoCopyJarHandler=true, its failing with java.lang.IllegalArgumentException: URI has a query component. | Where do I find all these tests? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117854#4117854 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4117854

18 years, 2 months

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jboss-dev-forums January 2008