No transactions available for Infinispan when running in JBoss EAP 6.1?

[danielnuss]

The Infinispan user guide (version 5.3: http://infinispan.org/docs/5.3.x/user_guide/user_guide.html#sid-68355126_InfinispanServer-Transactions) states in section 27.3.2 under point transactions:

"While it is possible to configure server caches to be transactional, none of the available protocols offer transaction capabilities."

1. Is this the right place to look up how to configure the Infinispan subsystem in JBoss EAP 6.1 as well (because this is the section which describes the Infinispan standalone server)?

2. Does this statement mean, that caches i configure in the JBoss container can't participate in a JTA transaction? Or do i totally misunderstand this statement?

Background: I wanted to do an explicit lock on a specific key to synchronize reading of a block of data, because i have the use case that several values added in the cache have to be processed in correct order. According to the user guide, an explicit lock can only be obtained in a transactional cache, and so i stumbled across this statement...

Edit: Maybe this is easier to answer, my original question was: How can i define pessimistic locking or at least eager-locking for Infinispan in JBoss (or is it even possible)? I didn't find enough information regarding configuring transactions in the infinispan subsystem in the JBoss configuration files to do so. I just want to set a cluster-wide lock on a specific key in Infinispan within JBoss (for which i have to configure pessimistic locking, otherwise i get exceptions). It would be great if someone could help me here.

[nadirx]

Daniel,

the documentation is related to Infinispan Server's use of the caches provided by the Infinispan subsystem. The Infinispan subsystem allows you to configure a cache as transactional, but since none of the remote protocols (HotRod, REST, memcached, Websockets) support transactions yet, it is pretty pointless.

However, in the context of EAP, where an application consumes the cache in embedded fashion, this is fine.

[danielnuss]

Okay, this is great news. But then i am entirely missing documentation about how i configure things like eager-locking or pessimistic locking inside the infinispan subsystem inside JBoss. As said in the question, i basically want to do a cluster-wide lock on a specific key (e.g. to be able to implement a cluster-wide counter). Where do i find this information? All i found right now is this xsd (which is outdated, e.g. i could not use the element eager-locking which can be found there): https://raw.github.com/jbossas/jboss-as/7.0.0.Final/build/src/main/resources/docs/schema/jboss-infinispan.xsd

[nadirx]

You want this:

https://raw.github.com/jbossas/jboss-as/7.2.0.Final/build/src/main/resources/docs/schema/jboss-as-infinispan_1_4.xsd

Tristan

[danielnuss]

That was indeed the missing information i was looking for. With this xsd it was no problem to configure pessimistic locking and to obtain a cluster-wide lock on a specific key afterwards. Many thanks, Tristan!