5.2 XML schema
by Tristan Tarrant
Hi all,
as part of my work on ISPN-1978 [1] and ISPN-2210 [2], I have hit a snag
with the XML schema and the extensibility I want to allow:
- currently elements in the global and cache configuration can be placed
in any order and can happen at most once (using the <xs:all /> element)
- I want to add an <xs:any namespace="##other /> element to the <xs:all
/> above, but this is not allowed in XMLSchema 1.0. It is however a
valid construct in XMLSchema 1.1
- Eclipse (even the latest Juno) does not validate XMLSchema 1.1 files
and therefore developers using it wouldn't be able to get content assist
when editing Infinispan configuration files
Possible solutions:
- I go with a 1.1 schema, telling Eclipse users to pressure for an
updated XML editor
- I stay with a 1.0 schema, but swap <xs:all> with <xs:sequence>, which
forces the elements to appear in a specific order (minus), but allows
extension points to be treated as first-class citizens (plus)
- I stay with a 1.0 schema, and place the extension points inside a
<modules> element which can be a child of <global>, <default> and
<namedCache>. This allows elements to be in any order, but adds the
extra indirection.
Fortunately we don't have this issue with the cache stores since that is
a <xs:sequence>.
Opinions ?
Tristan
[1] https://issues.jboss.org/browse/ISPN-1978
[2] https://issues.jboss.org/browse/ISPN-2210
13 years, 4 months
Put Command
by Meena Rajani
Hi
I am modifying cache with freshness and consistency parameters for QoS.
I want to know how an update to a database is done when cache is in
invalidation mode and when it is in replication mode(both sync, async) Can
some one please send me a simple algorithm of an update/modification
Infinispan in Invalidation Mode
when I want to insert/modify some data with ejb entity,
1 Does it invalidate data in the cache and then goes to the database and
update over there?
Infinispan in Replication Mode
when I want to insert/modify some data with ejb entity,
2. Does it replicate data(in local and Across the cluster ) and then update
the data to the database? what happens in case of failure.
Thanks
Meena Rajani
13 years, 4 months
We have 10 pull reqs outstanding...
by Galder Zamarreño
Barring the ones marked as deferred (in the title)…
So, let's get cracking :)
If you're taking any, note it in the assignment field. If there're already assigned to someone, leave it to them.
Cheers,
--
Galder Zamarreño
Sr. Software Engineer
Infinispan, JBoss Cache
13 years, 4 months
Cache Loaders configuration dilemma
by Tristan Tarrant
Hi guys,
as part of ISPN-1978, I'm migrating the Cache Loaders to the new
configuration builder APIs. I want to change the init() method of the
CacheLoaders which has the following signature
public void init(CacheLoaderConfig config, Cache<?, ?> cache,
StreamingMarshaller m) throws CacheLoaderException
to the following:
public void init(AbstractLoaderConfiguration config, Cache<?, ?> cache,
StreamingMarshaller m) throws CacheLoaderException
This will break all existing cache loaders/stores: I'll fix all the ones
bundled in the distribution, but do we need to provide compatibility
with third party loaders ?
Tristan
13 years, 4 months
Issue about propagation of the RollbackCommand in Infinispan 5.2.0
by Sebastiano Peluso
Hi all,
I have a question about the propagation of the RollbackCommand in
Infinispan 5.2.0 when I use the Optimistic locking scheme and the
Distribution clustering mode.
In particular I have noticed that a RollbackCommand command for a
transaction T is propagated on a set of nodes S even if T's coordinator
has never sent and it will never send a PrepareCommand command to nodes
in S.
I try to make clear the issue by the following example.
Suppose you have a transaction T executing on node N0 and T writes on
keys k0, k1, k2,...., km (m+1 keys) until it reaches the prepare phase.
In addition node Ni, with i=0,...,m+1, is the ki's primary owner. If at
prepare time, during the lock acquisition on the local node N0 (see
visitPrepareCommand method in OptimisticLockingInterceptor class) T
fails to acquire the lock on k0, an exception is thrown (e.g.
TimeoutException) and T will be rolled back. In this case, when T starts
the rollback phase, it seems to me that a RollbackCommand command is
multicast to all nodes Nj, with j=1,...,d, if k0 is sorted after kj
during the local lock acquisition (see acquireAllLocks method in
OptimisticLockingInterceptor), because:
- shouldInvokeRemoteCommand method on the TxInvocationContext returns
true (see BaseRpcInterceptor class);
- getAffectedKeys on the TxInvocationContext returns the set {k1,...,
kd} (see visitRollbackCommand in DistributionInterceptor class).
Is it correct?
If I'm not wrong, which is the design choice behind this implementation?
Thank you.
Best regards,
Sebastiano Peluso
--
Sebastiano Peluso, PhD student
Department of Computer, Control and Management Engineering
Sapienza University of Rome
Via Ariosto 25, 00185, Rome, Italy
Tel. +39 06 77274108
Webpage http://www.dis.uniroma1.it/~peluso
Distributed Systems Group, INESC-ID
Instituto Superior Técnico
Rua Alves Redol 9, 1000-029, Lisbon, Portugal
Webpage http://www.gsd.inesc-id.pt/~peluso
13 years, 4 months
NBST design
by Adrian Nistor
Hi,
I managed to rewrite the old NBST design document and created a v2 [1]
that should cover the interesting aspects. I'm not sure I managed to
make it intelligible and sound enough, but this is the best I could do
after several attempts at rewriting :)
Please read it. Your feedback is welcome!
The old document is still there [2] for now but should not be relied
upon. I kept it because some parts of it might still be relevant and
could be moved to v2 doc, but I don't think they are essential in
understading the code of our pull request. Dan, could you have a look if
there are any bits that we need to move to v2?
Thanks,
Adrian
[1] https://community.jboss.org/wiki/Non-BlockingStateTransferV2
[2] https://community.jboss.org/wiki/Non-blockingStateTransfer
13 years, 4 months
