[EJB3] - Re: SLSB pool size is always one in jboss 6.0 CR1 using ejb 3.1
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jaikiran pai [http://community.jboss.org/people/jaikiran] created the discussion
"Re: SLSB pool size is always one in jboss 6.0 CR1 using ejb 3.1"
To view the discussion, visit: http://community.jboss.org/message/572509#572509
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The EJB3.1 spec says (for singleton bean concurrency):
If the concurrency locking attribute is not specified, it is assumed
to be Lock(WRITE). The absence of a concurrency attribute specification on the bean class
is equivalent to the specification of Lock(WRITE)on the bean class.
Furthermore, the spec says:
If the container invokes a method associated with a Read lock, any
number of other concurrent invocations on Read methods are allowed to access the bean
instance simultaneously.
If the container invokes a method associated with a Write lock, no other concurrent
invocations will be allowed to proceed until the initial Write method’s processing
completes. A concurrent access attempt that is not allowed to proceed due to locking is
blocked until it can make forward progress.
Your @Singleton bean doesn't specify any explicit @Lock. So it's treated by
default as WRITE lock and that explains the behaviour you are seeing.
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aravind kopparthi [http://community.jboss.org/people/aravindsk] created the discussion
"Re: SLSB pool size is always one in jboss 6.0 CR1 using ejb 3.1"
To view the discussion, visit: http://community.jboss.org/message/572522#572522
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thanks for the comments. but in my example Singleton is not trying to do any WRITES is
it? all the business logic is in SLSBean that this singleton delegates to. my question
what is that i need to configure in the interseptors some where where SLSB injected in
Singleton are not treaded like regular beans and handle with multiple pool instances when
ever a method is invoked by the container ( timout) or by the calller.
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