In SRV.1.2 What is a Servlet Container?
... "For example, high-end application servers may limit the creation of a Thread object, to insure that other components of the container are not negatively impacted."
SRV.9.11 Web Application Environment
... "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."
-Tim
Shapira, Yoav wrote:
Howdy, One thing to note is that a servlet container and a J2EE server are not the same. Tomcat is the former but not the latter. Weblogic, websphere, jboss, etc. are the latter. They implement the whole J2EE spec which places more restrictions on thread creation by applications: read the spec if you want the actual text (I don't remember if off-hand).
In a servlet containr, you can create your own threads. Just like in other environments, you must be careful with how you manage them, especially making sure they are appropriately terminated by your application or by the JVM itself if they're daemons.
Yoav Shapira Millennium ChemInformatics
-----Original Message----- From: David Wall [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 30, 2003 12:15 PM To: [EMAIL PROTECTED] Subject: Threaded servlets okay in a compliant container?
I recall reading that conformant servlets and such (EJBs?) do not
create
their own threads, something about being a container issue.
Does anybody know the primary objection to launching threads that take on a life of their own? The container doesn't really need to manage
it,
per se. I suppose a container can drop servlet objects from memory, but as that wouldn't necessarily affect a daemon thread, it seems that doesn't harm launching them at startup, and of course the servlet could even stop
the
threads when told to destroy itself if that makes sense.
Does anybody know if most servlet containers today (Tomcat 4+,
WebLogic,
WebSphere...) have a real problem with such new threads being created
or
not? What would be the risk in my using them?
I previously posted this by accident on the PostgreSQL JDBC list and I
got
mixed answers. Some say it's fine, others say there's no spec saying
such
threads can't be used, and others say that BEA complained about support issues related to apps that created their own threads.
Any feedback is much appreciated.
Thanks, David
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