Re: [Neo] neo4j with terracotta?
Ok, no, we have not looked into that, if not someone else had a try. If you do, please let us others know your findings! /peter GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org- New Energy for Data - The Graph Database. http://www.ops4j.org- New Energy for OSS Communities - Open Participation Software. http://www.linkedprocess.org - Distributed computing on LinkedData scale On Mon, Aug 17, 2009 at 2:06 PM, Marc Preddiempred...@gmail.com wrote: Hi Peter, Initially simply looking to replicate for high availability. Regards, Marc On Sun, Aug 16, 2009 at 2:01 PM, Peter Neubauer neubauer.pe...@gmail.comwrote: Mmh, have not heard anyone doing that, what kind of scaling are you imagining? Replicating a nodespace in a high availability scenario, sharding or partitioning? /peter GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - New Energy for Data - The Graph Database. http://www.ops4j.org - New Energy for OSS Communities - Open Participation Software. http://www.linkedprocess.org - Distributed computing on LinkedData scale On Fri, Aug 14, 2009 at 7:54 PM, Marc Preddiempred...@gmail.com wrote: Hi All, I was just wondering if any users of neo4j has had to opportunity to integrate it with terracotta? Regards, Marc Preddie ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] NullPointerException
Hi,
What Spring configuration do you have in place? The static setup used
in b8 has been removed (see this thread for more information
http://lists.neo4j.org/pipermail/user/2009-May/001243.html) so change
your configuration to something like this:
bean id=neo class=org.neo4j.api.core.EmbeddedNeo
destroy-method=shutdown lazy-init=false
constructor-arg
value${neo.store}/value
/constructor-arg
/bean
tx:annotation-driven transaction-manager=transactionManager/
alias name=neoTransactionManager alias=transactionManager/
bean id=neoTransactionManagerService
class=org.neo4j.impl.transaction.SpringTransactionManager
constructor-arg ref=neo/
/bean
bean id=neoUserTransactionService
class=org.neo4j.impl.transaction.UserTransactionImpl
constructor-arg ref=neo/
/bean
bean id=neoTransactionManager
class=org.springframework.transaction.jta.JtaTransactionManager
property name=transactionManager ref=neoTransactionManagerService/
property name=userTransaction ref=neoUserTransactionService/
/bean
Let me know if that works.
Regards,
-Johan
On Mon, Aug 17, 2009 at 10:27 PM, Moh, Garygary@merrillcorp.com wrote:
after upgrading to apoc 0.2, the same test case produces the following
error:
java.lang.NullPointerException
at
org.neo4j.impl.transaction.UserTransactionImpl.getStatus(UserTransaction
Impl.java:71)
at
org.springframework.transaction.jta.JtaTransactionManager.isExistingTran
saction(JtaTransactionManager.java:820)
at
org.springframework.transaction.support.AbstractPlatformTransactionManag
er.getTransaction(AbstractPlatformTransactionManager.java:351)
at
org.springframework.transaction.interceptor.TransactionAspectSupport.cre
ateTransactionIfNecessary(TransactionAspectSupport.java:263)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invok
e(TransactionInterceptor.java:101)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Ref
lectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedIntercept
or.intercept(Cglib2AopProxy.java:635)
and the error went away when reverting back to 0.1
gary
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Re: [Neo] neo4j with terracotta?
Just curious, is there anything else people are doing with Neo4J to meet high-availability requirements? On Tue, Aug 18, 2009 at 2:23 AM, Peter Neubauer neubauer.pe...@gmail.comwrote: Ok, no, we have not looked into that, if not someone else had a try. If you do, please let us others know your findings! /peter GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org- New Energy for Data - The Graph Database. http://www.ops4j.org- New Energy for OSS Communities - Open Participation Software. http://www.linkedprocess.org - Distributed computing on LinkedData scale On Mon, Aug 17, 2009 at 2:06 PM, Marc Preddiempred...@gmail.com wrote: Hi Peter, Initially simply looking to replicate for high availability. Regards, Marc On Sun, Aug 16, 2009 at 2:01 PM, Peter Neubauer neubauer.pe...@gmail.comwrote: Mmh, have not heard anyone doing that, what kind of scaling are you imagining? Replicating a nodespace in a high availability scenario, sharding or partitioning? /peter GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org- New Energy for Data - The Graph Database. http://www.ops4j.org- New Energy for OSS Communities - Open Participation Software. http://www.linkedprocess.org - Distributed computing on LinkedData scale On Fri, Aug 14, 2009 at 7:54 PM, Marc Preddiempred...@gmail.com wrote: Hi All, I was just wondering if any users of neo4j has had to opportunity to integrate it with terracotta? Regards, Marc Preddie ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] neo4j with terracotta?
On Tue, Aug 18, 2009 at 15:02, Dennis Petersondennisbpeter...@gmail.com wrote: Just curious, is there anything else people are doing with Neo4J to meet high-availability requirements? Two architectures seem to have emerged: a) Add a REST layer in front of your Neo4j backend. That REST layer speaks the domain language (i.e. Persons, Cars, Images rather than Nodes, Relationships, etc) and it pushes mutating messages onto some form of a queue (something like ActiveMQ/RabbitMQ/Tibco/SQS) which is propagated to the backing Neo4j instances. Read requests are dispatched to one of the instances. We have a number of commercial customers that use this setup. b) Use the online backup to create a warm spare. That warm spare can be used to create infrequently synchronized read-only slaves (updated maybe hourly or something like that). Cheers, -- Emil Eifrém, CEO [e...@neotechnology.com] Neo Technology, www.neotechnology.com Cell: +46 733 462 271 | US: 206 403 8808 http://twitter.com/emileifrem ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] InMemoryNeoService
Hi Gary, I'm forwarding this to the list, since it might be of general interest. I have made some experiments towards an in-memory version of NeoService implemented as a transport layer for RemoteNeo. But I didn't have time to finalize it. If anyone wants to give it a shot, this approach is probably the easiest. We have some vague plans of doing an in-memory implementation of NeoService as part of the work on NeoHA, but that would not be earlier than late Q4 this year. Cheers, Tobias On Mon, Aug 17, 2009 at 8:33 PM, Moh, Gary gary@merrillcorp.com wrote: Hi Tobias, I came upon your message regarding an in-memory version of NeoService. Just wondering if there is any update on this feature. Thanks, gary -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] InMemoryNeoService
So that kind of ties in with the Terracotta questions. An InMemory service could be distributed and persisted by Terracotta. Though I'm not sure I'd actually suggest anyone doing that as Terracotta's persistence is more fragile than the Neo4J storage. ATB Neil On 18 Aug 2009, at 15:16, Tobias Ivarsson wrote: Hi Gary, I'm forwarding this to the list, since it might be of general interest. I have made some experiments towards an in-memory version of NeoService implemented as a transport layer for RemoteNeo. But I didn't have time to finalize it. If anyone wants to give it a shot, this approach is probably the easiest. We have some vague plans of doing an in-memory implementation of NeoService as part of the work on NeoHA, but that would not be earlier than late Q4 this year. Cheers, Tobias On Mon, Aug 17, 2009 at 8:33 PM, Moh, Gary gary@merrillcorp.com wrote: Hi Tobias, I came upon your message regarding an in-memory version of NeoService. Just wondering if there is any update on this feature. Thanks, gary -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
