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General J2EE: Threads in an J2EE Application

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  1. Threads in an J2EE Application (2 messages)

    Hi,

    Can you create and run threads from within your webcontainer in WebSphere 6? We have just been to a presentation and we have been told that new thread creation has been prohibited.

    I know that thread creation in containers is not good because of management etc but I did not realise it would be stopped in WAS6.

    We are planning to migrate from 4 to 6 and we have found that a number of apps use threads!! This could be a big problem if it is true.....

    Thanks in advance

    Andy
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    Threaded Messages (2)

  2. Threads in an J2EE Application[ Go to top ]

    Hi Andrew,

    You should check out the WorkManager JSR (236/237). If you are interested in a clustered WorkManager implementation you should check out Coherence.

    Later,
    Rob Misek
    Tangosol, Inc.
    Coherence: The Enterprise Data Grid
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  3. Threads in an J2EE Application[ Go to top ]

    WebSphere App Server strongly discourages you from creating threads. I don't believe that the web container will prohibit you from doing this, but it is currently unsupported....

    From the Servlet 2.3 spec section SRV.9.11:
    "Such servlet containers should support this behavior when performed on threads created by the developer, but are not currently required to do so. Such a requirement will be added in the next version of this specification. Developers are cautioned that depending on this capability for application-created threads is nonportable."

    Luckily, WAS gives you two mechanisms to do this safely; Asynchronous Beans and the Commonj WorkManager...

    Here's a link:
    http://publib.boulder.ibm.com/infocenter/wasinfo/v6r0/topic/com.ibm.websphere.base.doc/info/aes/ae/welc6tech_asb.html

    -- Chris
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