RE: [JBoss-user] JBoss questions...
|I believe that this is misinformation. JBoss's bundled transaction |manager implements two phase commit, so using multiple XAResources in |the same transaction should work fine. | |What it doesn't support is propagating the transaction context to other |transaction managers, i.e. outside one JVM. that is misinformation as well. We DO propagate the context, we just don't provide a JBossTX that supports extraVM import export, we integrate with others TM We really must do the proof of concept ONCE AND FOR ALL, to put this misinformation to be... ole you there? marc | |Toby. | | |___ |JBoss-user mailing list |[EMAIL PROTECTED] |http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss questions...
JBoss has support for distributed transactions it is the JBossTx that doesn't, to get distributed transactions you can drop tyrex or jonas' tx in JBoss and it should work. We are going to provide it since folks are asking for it. HOWEVER 1- It is a purely "checkpoint" feature, I don't know of ANYONE really using it in production with the other vendors 2- Which is why we made the CONSCIOUS decision to let JBossTX run fast in VM and leave the cumbersome distributed TX out Again we should really package a JBoss with distributed TX, but I am willing to be few if any are going to use it, marc |-Original Message- |From: [EMAIL PROTECTED] |[mailto:[EMAIL PROTECTED]]On Behalf Of |Crothers.Dean |Sent: Thursday, March 29, 2001 9:19 PM |To: [EMAIL PROTECTED] |Subject: RE: [JBoss-user] JBoss questions... | | |Filip, | |thanks for the explanation, even though its not what I wanted to hear!! | |So I guess the issue now is when will JBoss support distributed |transactions |- does anybody know??? | | |thanks again, | |Dean | |-Original Message- |From: Filip Hanik [mailto:[EMAIL PROTECTED]] |Sent: Thursday, March 29, 2001 5:28 PM |To: [EMAIL PROTECTED] |Cc: [EMAIL PROTECTED] |Subject: RE: [JBoss-user] JBoss questions... | | |> You mentioned that 'true 2 phase commit' is not implemented in JBoss? The |> logging of the JBoss console at startup outputs: |> |> [SQLServerPool] Starting |> [SQLServerPool] XA Connection pool SQLServerPool bound to |> java:/SQLServerPool |> [SQLServerPool] Started | |Well. that is the jdbc driver that implements the XA protocol. |This means that if the server was able to handle distributed transactions, |the underlying driver will support that. | |so for a distributed transaction to work across multiple database |servers to |work it requires a) the driver to handle two phase commits and b) |the server |to implement the logic for the distributed transactions. | |now, if I remember correctly, jboss doesn't seem to have support for |distributed transactions, but hey, I could be full of shit, so if I am |please correct me :) | |Filip | |~ |Namaste - I bow to the divine in you |~ |Filip Hanik |Software Architect |[EMAIL PROTECTED] |www.filip.net | | |___ |JBoss-user mailing list |[EMAIL PROTECTED] |http://lists.sourceforge.net/lists/listinfo/jboss-user | |___ |JBoss-user mailing list |[EMAIL PROTECTED] |http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] JBoss questions...
[ apologies if this message appears more than once - mail client probs ] On Thu, Mar 29, 2001 at 06:18:46PM -0800, Crothers.Dean wrote: > Filip, > > thanks for the explanation, even though its not what I wanted to > hear!! > > So I guess the issue now is when will JBoss support distributed > transactions - does anybody know??? I believe that this is misinformation. JBoss's bundled transaction manager implements two phase commit, so using multiple XAResources in the same transaction should work fine. What it doesn't support is propagating the transaction context to other transaction managers, i.e. outside one JVM. Toby. ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss questions...
Hi, I have no direct experience with a real XA driver, but I have been studying the JCA code in jbosscx, set up my Firebird server to work with blackbox adapter, and written another resource adapter. My conclusion from reading the code is that... 2pc is different from distributed transaction manager. At least the jbosscx appears to support 2pc from one server properly. This situation is where you have only one jboss server, but it accesses several database instances. The code to do this is in place, it appears to me to work properly ( I wouldn't promise, my resource adapter is rather odd). This code should work with any resource exposing an XAResource interface, so the tm can prepare everyone and then commit everyone. Distributed transaction manager means ( I think) you have 2 or more jboss servers and you want them to all participate in one transaction. In this case one server starts the prepare, it has to tell the other servers to prepare also... this means propagating the transaction to the other servers, then they prepare their resources and return the votes, then the committing server says commit. This stuff is not really implemented. There is a transaction propagation context, but I understand the tm can't really deal with it. I don't know if the more "default" (non JCA) minerva XADatasource implementations handle 2pc from one server properly-- I had the impression they did. Earlier in this thread there was some discussion of pooling. The JCA spec makes it pretty clear that pooling behavior is NOT part of the resource adapter (e.g. connection implementation) but is a service provided by the server (although the resource adapter provider should provide some connection management as a default so the resource adapter can be used in non managed scenarios). In at least the jbosscx stuff, this pooling is exactly (and all of) what minerva supplies. I hope you will consider trying out the jbosscx framework and possibly contributing to it rather than the perhaps soon to be obsolete datasource-wrapper-only framework. Thanks David Jencks On 2001.03.29 20:28:15 -0500 Filip Hanik wrote: > > You mentioned that 'true 2 phase commit' is not implemented in JBoss? > The > > logging of the JBoss console at startup outputs: > > > > [SQLServerPool] Starting > > [SQLServerPool] XA Connection pool SQLServerPool bound to > > java:/SQLServerPool > > [SQLServerPool] Started > > Well. that is the jdbc driver that implements the XA protocol. > This means that if the server was able to handle distributed > transactions, > the underlying driver will support that. > > so for a distributed transaction to work across multiple database servers > to > work it requires a) the driver to handle two phase commits and b) the > server > to implement the logic for the distributed transactions. > > now, if I remember correctly, jboss doesn't seem to have support for > distributed transactions, but hey, I could be full of shit, so if I am > please correct me :) > > Filip > > ~ > Namaste - I bow to the divine in you > ~ > Filip Hanik > Software Architect > [EMAIL PROTECTED] > www.filip.net > > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss questions...
Filip, thanks for the explanation, even though its not what I wanted to hear!! So I guess the issue now is when will JBoss support distributed transactions - does anybody know??? thanks again, Dean -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 29, 2001 5:28 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: RE: [JBoss-user] JBoss questions... > You mentioned that 'true 2 phase commit' is not implemented in JBoss? The > logging of the JBoss console at startup outputs: > > [SQLServerPool] Starting > [SQLServerPool] XA Connection pool SQLServerPool bound to > java:/SQLServerPool > [SQLServerPool] Started Well. that is the jdbc driver that implements the XA protocol. This means that if the server was able to handle distributed transactions, the underlying driver will support that. so for a distributed transaction to work across multiple database servers to work it requires a) the driver to handle two phase commits and b) the server to implement the logic for the distributed transactions. now, if I remember correctly, jboss doesn't seem to have support for distributed transactions, but hey, I could be full of shit, so if I am please correct me :) Filip ~ Namaste - I bow to the divine in you ~ Filip Hanik Software Architect [EMAIL PROTECTED] www.filip.net ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss questions...
> You mentioned that 'true 2 phase commit' is not implemented in JBoss? The > logging of the JBoss console at startup outputs: > > [SQLServerPool] Starting > [SQLServerPool] XA Connection pool SQLServerPool bound to > java:/SQLServerPool > [SQLServerPool] Started Well. that is the jdbc driver that implements the XA protocol. This means that if the server was able to handle distributed transactions, the underlying driver will support that. so for a distributed transaction to work across multiple database servers to work it requires a) the driver to handle two phase commits and b) the server to implement the logic for the distributed transactions. now, if I remember correctly, jboss doesn't seem to have support for distributed transactions, but hey, I could be full of shit, so if I am please correct me :) Filip ~ Namaste - I bow to the divine in you ~ Filip Hanik Software Architect [EMAIL PROTECTED] www.filip.net ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss questions...
Filip, thanks for your reply. You mentioned that 'true 2 phase commit' is not implemented in JBoss? The logging of the JBoss console at startup outputs: [SQLServerPool] Starting [SQLServerPool] XA Connection pool SQLServerPool bound to java:/SQLServerPool [SQLServerPool] Started where 'SQLServerPool' holds SQL Server database connections. I assumed that since this connection pool looks to be associated with a XA resource I would have thought that one JBoss server would be able to partake in a 2PC across multiple SQL Server databases? Am I missing something here?? thanks again, Dean -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 29, 2001 2:29 PM To: [EMAIL PROTECTED] Subject: RE: [JBoss-user] JBoss questions... > 1) when using BMP how do you return a database connection to the pool when > your finished with it? Connection.close(); > > 2) can JBoss perform distributed transactions with SQL Server? If so, is > there any information showing how to do this with BMP? > nope, true 2 phase commit is not implemented,. the only server that has it is Weblogic 6.0 > 3) our current RMI based app executes batch jobs in a thread on > the server, > and these threads pound SQL Server. Given that EJB doesnt allow > new threads > to be spawned, how can this be achieved using the EJB model? use JMS to do asynchronous requests > 4) does/will JBoss support load balancing between multiple JBoss > app servers > running concurrently on different win2000 boxes? yes, if it is stateful loadbalancing, it your request gets pinned to a machine when the connection is established. true loadbalancing is underway. > 5) is there any published schedule of the planned upcoming > releases and what > th dunno Filip ~ Namaste - I bow to the divine in you ~ Filip Hanik Software Architect [EMAIL PROTECTED] www.filip.net > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of > Crothers.Dean > Sent: Thursday, March 29, 2001 1:57 PM > To: [EMAIL PROTECTED] > Subject: [JBoss-user] JBoss questions... > > > Hi, > > I've looked on the website and thru the archives, but couldnt find answers > to the following questions. > > But first some background, we plan to use JBoss 2.1 on Win2000 > with multiple > SQL Server databases (potentially on different boxes). > > 1) when using BMP how do you return a database connection to the pool when > your finished with it? > > 2) can JBoss perform distributed transactions with SQL Server? If so, is > there any information showing how to do this with BMP? > > 3) our current RMI based app executes batch jobs in a thread on > the server, > and these threads pound SQL Server. Given that EJB doesnt allow > new threads > to be spawned, how can this be achieved using the EJB model? > > 4) does/will JBoss support load balancing between multiple JBoss > app servers > running concurrently on different win2000 boxes? > > 5) is there any published schedule of the planned upcoming > releases and what > they will contain? > > > thanks, > > Dean > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] JBoss questions...
> 1) when using BMP how do you return a database connection to the pool when > your finished with it? Connection.close(); > > 2) can JBoss perform distributed transactions with SQL Server? If so, is > there any information showing how to do this with BMP? > nope, true 2 phase commit is not implemented,. the only server that has it is Weblogic 6.0 > 3) our current RMI based app executes batch jobs in a thread on > the server, > and these threads pound SQL Server. Given that EJB doesnt allow > new threads > to be spawned, how can this be achieved using the EJB model? use JMS to do asynchronous requests > 4) does/will JBoss support load balancing between multiple JBoss > app servers > running concurrently on different win2000 boxes? yes, if it is stateful loadbalancing, it your request gets pinned to a machine when the connection is established. true loadbalancing is underway. > 5) is there any published schedule of the planned upcoming > releases and what > th dunno Filip ~ Namaste - I bow to the divine in you ~ Filip Hanik Software Architect [EMAIL PROTECTED] www.filip.net > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of > Crothers.Dean > Sent: Thursday, March 29, 2001 1:57 PM > To: [EMAIL PROTECTED] > Subject: [JBoss-user] JBoss questions... > > > Hi, > > I've looked on the website and thru the archives, but couldnt find answers > to the following questions. > > But first some background, we plan to use JBoss 2.1 on Win2000 > with multiple > SQL Server databases (potentially on different boxes). > > 1) when using BMP how do you return a database connection to the pool when > your finished with it? > > 2) can JBoss perform distributed transactions with SQL Server? If so, is > there any information showing how to do this with BMP? > > 3) our current RMI based app executes batch jobs in a thread on > the server, > and these threads pound SQL Server. Given that EJB doesnt allow > new threads > to be spawned, how can this be achieved using the EJB model? > > 4) does/will JBoss support load balancing between multiple JBoss > app servers > running concurrently on different win2000 boxes? > > 5) is there any published schedule of the planned upcoming > releases and what > they will contain? > > > thanks, > > Dean > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] JBoss questions...
Hi, I've looked on the website and thru the archives, but couldnt find answers to the following questions. But first some background, we plan to use JBoss 2.1 on Win2000 with multiple SQL Server databases (potentially on different boxes). 1) when using BMP how do you return a database connection to the pool when your finished with it? 2) can JBoss perform distributed transactions with SQL Server? If so, is there any information showing how to do this with BMP? 3) our current RMI based app executes batch jobs in a thread on the server, and these threads pound SQL Server. Given that EJB doesnt allow new threads to be spawned, how can this be achieved using the EJB model? 4) does/will JBoss support load balancing between multiple JBoss app servers running concurrently on different win2000 boxes? 5) is there any published schedule of the planned upcoming releases and what they will contain? thanks, Dean ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
