February 2009 - jboss-user - Jboss List Archives

[JBoss Cache: Core Edition] - Writing custom Async Loader

by canik

Hello folks, First a little intro to my persistence problem: I'm writing data to a couple of different nodes in JBoss Cache. I'm doing this in a batch (afaik this is interpreted as a transaction by JBoss) since the different cache nodes in fact contain a memory snapshot of a parsing process. The parsing process is fast, that is, there can be lots of put operations per second. Thus I use async. replication, to replicate the data only every ~500ms. The problem is, I do not need the database to be hit that often. It would be absolutely sufficient to write the last snapshot (without the intermediate stages) to the DB every 5 seconds. I cannot see any possibility to do this without custom coding. First I tried "cache.getInvocationContext().getOptionOverrides().setSuppressPersistence(true);" but this does not work for transactions. (Even if it worked, I still would have the little issue that if I suppress persistence for 5 seconds, and the parsing stopped for a while, the last message would not be persisted (because suppression is on), even if 10 hours had passed. But I could live with that.) Then I tried to write a custom cache loader based on the async loader. I tried both: extending AbstractDelegatingCacheLoader and extending AsyncCacheLoader. But start() e.g. never gets called in my implementation. I inserted log outputs in multiple methods. When the constructor is invoked, log output appears. Also, for setConfig(), and setCache() I can produce log output. But start() is never invoked. Nor are any of the put() methods invoked. Persistence via JDBC works, though. This is a cache configuration xml fragment: | <loaders passivation="false" shared="true"> | <loader class="mypackage.CustomJDBCCacheLoader" async="false" fetchPersistentState="false" | ignoreModifications="false" purgeOnStartup="false"> | <properties> | cache.jdbc.driver=org.postgresql.Driver | cache.jdbc.url=jdbc:postgresql://localhost:5432/... | cache.jdbc.user=... | cache.jdbc.password=... | cache.jdbc.table.name=... | cache.jdbc.table.drop=false | cache.jdbc.node.type=bytea | </properties> | </loader> | </loaders> | So, does anybody know why start() isn't invoked by the framework? Best regards, Can ÃÂzdemir import org.apache.commons.logging.Log; | import org.apache.commons.logging.LogFactory; | | public class CustomJDBCCacheLoader extends org.jboss.cache.loader.AsyncCacheLoader | { | private static final Log log = LogFactory.getLog(CustomJDBCCacheLoader.class); | | public CustomJDBCCacheLoader() | { | super(new org.jboss.cache.loader.JDBCCacheLoader()); | log.info("ASYNC JDBC LOADER Constructor"); | } | | @Override | public void start() throws Exception | { | log.info("-----------------Async cache loader starting: " + this); | System.out.println("-----------------Async cache loader starting: " + this); | | super.start(); | } | } | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211033#4211033 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211033

17 years, 2 months

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[JBoss Portal] - SAP iView Integration

by brain101

is there a possibility, beside iFrame or new window, to integrate sap iViews in jboss portal? has anyone had the same problem before? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211032#4211032 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211032

17 years, 2 months

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[JBoss Messaging] - Re: Exception coming in creating our own Connection Factory

by siddharth_2279

Hi, anonymous wrote : | bisocket is the default transport JBM uses. you can find remoting-http-service.xml under 5.0.0.GA/docs/examples/jms directory. I found the file at this path. Now what do I do ? Do I copy this file at location (jboss-5.0.0.GA\server\default\deploy\messaging). Do I need to do anything else.? Now should I start the server ? Please Help. Thanks in advance. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211030#4211030 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211030

17 years, 2 months

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[Beginners Corner] - Re: Action canceled

by aakjpe

Thank you for the reply. I tried to set the connectionTimeout to 1800000, but I still get the "Action is canceled". I also tried setting connectionTimeout to zero, which might mean "endless wait". But still "Action is canceled". I restartet jboss after I changed the value. But what about the "keepAliveTimeout"? Where do I find it, and is there any sense in trying to increase it? Or have you any other suggestions? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211029#4211029 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211029

17 years, 2 months

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[JBoss Tools (users)] - Re: Hibernate Tools: The chosen transaction strategy require

by viniciuscarvalho

Well, nervermind I've recreated the hibernate.cfg.xml but using the wizzard and now it works... Regards View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211028#4211028 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211028

17 years, 2 months

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[Beginners Corner] - Re: Timer in JBoss

by rodosa

Ok, I'll do this with a MBean!! View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211027#4211027 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211027

17 years, 2 months

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[EJB 3.0] - Re: calling a method from another method os same session bea

by Wolfgang Knauf

Yes: @Stateless | public class MyBean | { | public void method1() | { | this.method2(); | } | } Hope I understood your question ;-) Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211026#4211026 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211026

17 years, 2 months

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[EJB 3.0] - Re: javax.transaction.RollbackException

by Wolfgang Knauf

Hi Ramu, please post your modified code (and encapsulate it in "code" tags, see the toolbar in editor for the "Post reply" button). Also provide us with the exception and the line number in your own code. Best regards Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211025#4211025 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211025

17 years, 2 months

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[EJB 3.0] - Re: Couldn't handle invocation directly within...StatelessRe

by Wolfgang Knauf

Did you remove the security annotations (@SecurityDomain, @DeclareRoles, @RolesAllowed) in all your session beans and remote/local interfaces? Maybe one is left? Best regards Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211021#4211021 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211021

17 years, 2 months

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[EJB 3.0] - Re: javax.transaction.RollbackException

by mravikrish

Hi Wolfgang, I have tried exactly what u have said. but stll i am getting same exception. For time being i used two methods. In First method i am removing all its associated entties like buyerrating,vendorrating,skills,bids. In second method simply removing project object. But this approch pushing me to go database twice. i want to prform this in a single method. Any suggessions Thanks K.Ramu View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211020#4211020 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211020

17 years, 2 months

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jboss-user February 2009