[Persistence, JBoss/CMP, Hibernate, Database] - LEFT JOIN Problem
by toni
Hi,
I have two entities: Email and Person. Each Email entity is referencing a Person entity, but each Person entity is unaware of that.
I'm looking for an EJB QL statement, which will return for each Person how many Email Entities reference it. Or how many emails a Person has written.
I have a hard time coming up with a QL statement, because Person is not referencing back to Email, so I have no collection field to reference in a LEFT JOIN. Of course I could introduce one and the problem would be solved, but I'm trying to learn how do do this without one.
I have tried the following statements, but they all return 0 rows:
// I'am not sure if this is correct, because I'm joining on the emails. So if I have no emails for a person, then those person are excluded, I guess.
Select pe, count(a) FROM Email e LEFT JOIN e.person AS pe GROUP BY pe.id;
// So that's why I'm trying to join on the Person by pulling it into the equation, but I'm not sure, if this will actually join each Email on each Person?!
Select pe, count(e) FROM Person p, Email e JOIN e.person AS pe GROUP BY pe.id;
What ist the correct QL statement for this problem?
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995264#3995264
Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3995264
19 years, 4 months
[EJB/JBoss] - Re: Deployment failing-How to get debug information ?
by chrismm
OK, here goes :-
2006-12-20 11:01:46,269 DEBUG [javax.management.timer.Timer] start: jboss.jmx:name=SnmpAgent,service=timer,type=heartbeat at Wed Dec 20 11:01:46 GMT 2006
2006-12-20 11:01:50,660 INFO [org.apache.catalina.startup.Embedded] Catalina naming disabled
2006-12-20 11:01:50,738 INFO [org.apache.catalina.startup.ClusterRuleSetFactory] Unable to find a cluster rule set in the classpath. Will load the default rule set.
2006-12-20 11:01:50,738 INFO [org.apache.catalina.startup.ClusterRuleSetFactory] Unable to find a cluster rule set in the classpath. Will load the default rule set.
2006-12-20 11:01:51,176 INFO [org.apache.coyote.http11.Http11BaseProtocol] Initializing Coyote HTTP/1.1 on http-0.0.0.0-8880
2006-12-20 11:01:51,176 INFO [org.apache.catalina.startup.Catalina] Initialization processed in 438 ms
2006-12-20 11:01:51,176 INFO [org.apache.catalina.core.StandardEngine] Starting Servlet Engine: Apache Tomcat/5.5.17
2006-12-20 11:01:51,238 INFO [org.apache.catalina.core.StandardHost] XML validation disabled
2006-12-20 11:01:51,270 INFO [org.apache.catalina.startup.Catalina] Server startup in 94 ms
2006-12-20 11:01:51,879 INFO [org.apache.catalina.loader.WebappLoader] Dual registration of jndi stream handler: factory already defined
2006-12-20 11:01:59,567 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Initializing configuration from resource path /WEB-INF/struts-config.xml
2006-12-20 11:01:59,582 INFO [STDOUT] register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN', 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
2006-12-20 11:01:59,582 INFO [STDOUT] register('-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN', 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_2.dtd'
2006-12-20 11:01:59,598 INFO [STDOUT] register('-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN', 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_3.dtd'
2006-12-20 11:01:59,598 INFO [STDOUT] resolveEntity('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN', 'http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd')
2006-12-20 11:01:59,598 INFO [STDOUT] Resolving to alternate DTD 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
2006-12-20 11:01:59,614 INFO [STDOUT] New org.apache.struts.action.ActionFormBean
2006-12-20 11:01:59,614 INFO [STDOUT] Set org.apache.struts.action.ActionFormBean properties
2006-12-20 11:01:59,629 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addFormBean(ActionFormBean[filterForm])
2006-12-20 11:01:59,629 INFO [STDOUT] Pop org.apache.struts.action.ActionFormBean
2006-12-20 11:01:59,629 INFO [STDOUT] New org.apache.struts.action.ActionForward
2006-12-20 11:01:59,645 INFO [STDOUT] Set org.apache.struts.action.ActionForward properties
2006-12-20 11:01:59,645 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addForward(ActionForward[erro])
2006-12-20 11:01:59,645 INFO [STDOUT] Pop org.apache.struts.action.ActionForward
2006-12-20 11:01:59,645 INFO [STDOUT] New org.apache.struts.action.ActionForward
2006-12-20 11:01:59,645 INFO [STDOUT] Set org.apache.struts.action.ActionForward properties
2006-12-20 11:01:59,645 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addForward(ActionForward[home])
2006-12-20 11:01:59,645 INFO [STDOUT] Pop org.apache.struts.action.ActionForward
2006-12-20 11:01:59,660 INFO [STDOUT] New org.apache.struts.action.ActionMapping
2006-12-20 11:01:59,660 INFO [STDOUT] Set org.apache.struts.action.ActionMapping properties
2006-12-20 11:01:59,660 INFO [STDOUT] New org.apache.struts.action.ActionForward
2006-12-20 11:01:59,660 INFO [STDOUT] Set org.apache.struts.action.ActionForward properties
2006-12-20 11:01:59,660 INFO [STDOUT] Call org.apache.struts.action.ActionMapping.addForward(ActionForward[selectPID])
2006-12-20 11:01:59,676 INFO [STDOUT] Pop org.apache.struts.action.ActionForward
2006-12-20 11:01:59,676 INFO [STDOUT] New org.apache.struts.action.ActionForward
2006-12-20 11:01:59,676 INFO [STDOUT] Set org.apache.struts.action.ActionForward properties
2006-12-20 11:01:59,676 INFO [STDOUT] Call org.apache.struts.action.ActionMapping.addForward(ActionForward[errorSelection])
2006-12-20 11:01:59,676 INFO [STDOUT] Pop org.apache.struts.action.ActionForward
2006-12-20 11:01:59,676 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addMapping(ActionMapping[path=/filter, type=org.jboss.profiler.web.actions.FilterAction])
2006-12-20 11:01:59,676 INFO [STDOUT] Pop org.apache.struts.action.ActionMapping
2006-12-20 11:01:59,676 INFO [STDOUT] register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN', 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
2006-12-20 11:01:59,692 INFO [STDOUT] register('-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN', 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_2.dtd'
2006-12-20 11:01:59,692 INFO [STDOUT] register('-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN', 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_3.dtd'
2006-12-20 11:01:59,692 INFO [STDOUT] resolveEntity('-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN', 'http://java.sun.com/j2ee/dtds/web-app_2_2.dtd')
2006-12-20 11:01:59,692 INFO [STDOUT] Resolving to alternate DTD 'jar:file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27918jboss-profiler-exp.war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_2.dtd'
2006-12-20 11:01:59,707 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(memoryServlet/java.lang.String,/memory/java.lang.String)
2006-12-20 11:01:59,707 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=memoryServlet, urlPattern=/memory
2006-12-20 11:01:59,707 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(chartview/java.lang.String,/chartview/java.lang.String)
2006-12-20 11:01:59,707 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=chartview, urlPattern=/chartview
2006-12-20 11:01:59,707 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(action/java.lang.String,/do/*/java.lang.String)
2006-12-20 11:01:59,707 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=action, urlPattern=/do/*
2006-12-20 11:01:59,723 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(download/java.lang.String,/download/*/java.lang.String)
2006-12-20 11:01:59,723 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=download, urlPattern=/download/*
2006-12-20 11:01:59,723 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(excel/java.lang.String,/excel/*/java.lang.String)
2006-12-20 11:01:59,723 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=excel, urlPattern=/excel/*
2006-12-20 11:01:59,723 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(graphMemoryServer/java.lang.String,/graphMemoryServer/java.lang.String)
2006-12-20 11:01:59,723 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=graphMemoryServer, urlPattern=/graphMemoryServer
2006-12-20 11:01:59,723 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(graphServer/java.lang.String,/graphServer/java.lang.String)
2006-12-20 11:01:59,723 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=graphServer, urlPattern=/graphServer
2006-12-20 11:01:59,739 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(JBPProcess/java.lang.String,/JBPProcess/java.lang.String)
2006-12-20 11:01:59,739 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=JBPProcess, urlPattern=/JBPProcess
2006-12-20 11:01:59,739 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(JBTTransaction/java.lang.String,/JBTTransaction/java.lang.String)
2006-12-20 11:01:59,739 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=JBTTransaction, urlPattern=/JBTTransaction
2006-12-20 11:01:59,739 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(upload/java.lang.String,/upload/*/java.lang.String)
2006-12-20 11:01:59,739 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=upload, urlPattern=/upload/*
2006-12-20 11:01:59,739 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(uploadFile/java.lang.String,/uploadFile/java.lang.String)
2006-12-20 11:01:59,739 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=uploadFile, urlPattern=/uploadFile
2006-12-20 11:01:59,754 INFO [STDOUT] Call org.apache.struts.action.ActionServlet.addServletMapping(xmlConsolidated/java.lang.String,/xml/*/java.lang.String)
2006-12-20 11:01:59,754 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Process servletName=xmlConsolidated, urlPattern=/xml/*
2006-12-20 11:01:59,754 INFO [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jboss-profiler]] action: Mapping for servlet 'action' = '/do/*'
2006-12-20 11:02:26,380 ERROR [org.jboss.deployment.MainDeployer] Could not create deployment: file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/tmp/deploy/tmp27919merlin.ear-contents/tradableproductEJB.jar
org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for error messages. at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:610)
at sun.reflect.GeneratedMethodAccessor89.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
at org.jboss.ws.server.WebServiceDeployer.create(WebServiceDeployer.java:99)
at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.create(SubDeployerInterceptorSupport.java:180)
at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:91)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy32.create(Unknown Source)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:953)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:943)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:807)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:771)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy6.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
at $Proxy0.start(Unknown Source)
at org.jboss.system.ServiceController.start(ServiceController.java:417)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy4.start(Unknown Source)
at org.jboss.deployment.SARDeployer.start(SARDeployer.java:302)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1007)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:808)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:771)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:755)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy5.deploy(Unknown Source)
at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
at org.jboss.Main.boot(Main.java:200)
at org.jboss.Main$1.run(Main.java:464)
at java.lang.Thread.run(Thread.java:534)
2006-12-20 11:02:26,489 ERROR [org.jboss.deployment.scanner.URLDeploymentScanner] Incomplete Deployment listing:
--- Incompletely deployed packages ---
org.jboss.deployment.DeploymentInfo@9bfd6489 { url=file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/deploy/merlin.ear }
deployer: org.jboss.deployment.EARDeployer@1b1fbf4
status: Deployment FAILED reason: Verification of Enterprise Beans failed, see above for error messages.
state: FAILED
watch: file:/C:/tools/jboss-4.0.4.GA/server/MerlinServer/deploy/merlin.ear
altDD: null
lastDeployed: 1166612534926
lastModified: 1166612520285
mbeans:
2006-12-20 11:02:26,552 INFO [org.apache.coyote.http11.Http11BaseProtocol] Starting Coyote HTTP/1.1 on http-0.0.0.0-8880
2006-12-20 11:02:26,677 INFO [org.apache.jk.common.ChannelSocket] JK: ajp13 listening on /0.0.0.0:8009
2006-12-20 11:02:26,708 INFO [org.apache.jk.server.JkMain] Jk running ID=0 time=0/63 config=null
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995260#3995260
Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3995260
19 years, 4 months
[JBoss jBPM] - Re: BAM for jBPM
by kukeltje
Charles,
I'll try to draw up a more detailed response later this week, but I have at least one question for now. I see in the pictures that you have to define when data is send to seewhy. This could be either a node or an action on a node I presume. But what about the other way around? A long time ago, when we were in the process of selecting an non-foss bpm solution, we looked at one of the BEA products (don't know which anymore since they seem to switch names and implementations more often than M$ has done with dll/com/dcom/activex/.....) They had limited BAM/BI functionality and for that they partnered with a company that retrieved data from the database on a reqular (every x seconds). It had knowledge of the structure and we were told by visiting a satisfied user of that product that this had no major impact on DB performance.
This way, you do not have to change the process when you want to monitor other steps etc.... Any comments on this?
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995259#3995259
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19 years, 4 months