June 2007 - jboss-user - Jboss List Archives

[J2EE Design Patterns] - hosting multiple customers in single JBoss instance

by paulsson

Hello everybody. I have a general design question that I would like to get some input on. I am working on a fairly large JEE application that will be used by many customers that will range from small to large businesses (in terms of web traffic). This is a hosted application by the way. Currently, the application is designed to support one customer per EAR and each customer has their own database and DataSource access. Large enterprise class customers would have there own dedicated server and would be the only EAR running on JBoss. For small to medium size customers we would like to run multiple/many EARs on one instance of JBoss thus supporting multiple/many customers on one server. How does deploying multiple/many EARs in one instance of JBoss affect performance and system resources? For example, if 50 smaller customers produce the same amount of traffic, database access, object creation, EJB usage, and other IO as one large customer running on a dedicated server would we be able to expect the performance and system resource usage on both machines to be equivalent? Or, does the addition of each EAR running on JBoss (or any application server for that matter) require a significant amount of system resources to be used for each additional EAR? In other words, for each EAR added to a single instance of JBoss will this exponentially, linearly, or minutely affect the usage of system resources? Also, we have the situation where we need to be able to have demo accounts running on a hosted server. There is the potential to need 100s of demo accounts (should not reach into the 1000s). Assuming there is nothing wrong w/ the code , would JBoss be able to run this many EARs all in one instance? I understand we may need to cluster JBoss on several physical servers to accomplish this if it is even possible. If this is not possible, is it a big "no no" to support many customers through one EAR? Each customer would still have their own database, but the EAR now would have to determine which DataSource to use for each individual customer. Hopefully we would only need to go this route for demo accounts. I'm off to do testing, lots of that to do ;). Any thoughts or comments are much appreciated. Thanks, Erik View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052255#4052255 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052255

18 years, 10 months

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Jboss 5.0

by Jayesh

I am looking for any document on Jboss 5.0 , Looks like the deployment , configuration etc all changed quite dramatically. Does any one know if there is any document which explains what to change from porting jboss 4.0x to jboss 5.0 Regards

18 years, 10 months

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[Installation, Configuration & Deployment] - Re: SingleScheduleProvider and daylight savings?

by hale2jo

Ah-ha....There is a date format in the MBean properties.... | <attribute name="DateFormat">MM/dd/yy hh:mm a Z</attribute> | <attribute name="StartDate">12/08/06 12:00 am -0500</attribute> | I'm pretty sure when you use the UTC offset, you put in the offset ignoring DST, so -0500 refers to Eastern Standard Time (EST), but during DST it will know to use -0400 (EDT). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052254#4052254 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052254

18 years, 10 months

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[JBoss Seam] - Re: @In (create=true)

by monkeyden

Is it not possible to inject mutually exclusive instances of the same type? At first thought, the @Role solution seems awkward. I have been thinking about this same type of scenario, for a project still in the early stages of thought. I thought I might try using a discriminator column, to provide different subtypes. I've used this in Hibernate and another ORM api but have not tried it with JPA/EJB3 yet. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052250#4052250 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052250

18 years, 10 months

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[EJB 3.0] - Re: Get an MBean to start on JBoss startup

by psyllogism

Thanks, that worked. I had tried that earlier and it didn't work; but I must have typo-ed the attributes in the annotation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052249#4052249 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052249

18 years, 10 months

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[JBoss Messaging] - Re: ThreadPoolSize in non clustered configuration

by timfox

The threadpool is only used for cluster requests, so there is no need for one in the non clustered config View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052246#4052246 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052246

18 years, 10 months

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[Clustering/JBoss] - Re: session persistence and cluster cache (4.0.3 SP1)

by ablevine1

That is rather unfortunate as it poses a bit of problem for my company in that, when we upgrade our production ear, our sessions are lost. Is there another way around this issue?? Currently we distribute the war to our 3 app servers in a staggered fashion, allowing for about 2 minutes in between the dist to each server in order to allow for the app to restart, but we still occasionally lose sessions. Would using farming instead of our own distribution technique take care of this problem?? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052245#4052245 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052245

18 years, 10 months

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[JBoss Seam] - Re: Pages Hierarchy

by iradix

To be honest, if I'm really the only person interested in the feature I can live without it. Unless someone else feels like chiming in I can't see having you devote the time to changing it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052244#4052244 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052244

18 years, 10 months

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[JBoss Seam] - Re: render pdf without landing on blank page?

by dustismo

To answer my own question: |  | <h:commandButton | value="Export Now" | action="#{graphReport.export()}" | onclick="document.getElementById('graphreport_fm').target='_new';" | /> | |  | <h:commandButton | value="Save" | action="#{graphReport.email()}" | onclick="document.getElementById('graphreport_fm').target='';" | /> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052243#4052243 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052243

18 years, 10 months

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[Management, JMX/JBoss] - Re: ServiceMBean stop service

by dimitris＠jboss.org

It should work when you application is undeployed or the server shutsdown, so something is wrong with your implementation. Look in the wiki FAQJBossJMX for a template service. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052242#4052242 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4052242

18 years, 10 months

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jboss-user June 2007