Обсуждение: How to notify JBoss J2EE application in a trigger or rule???
Hi, I want a PostgreSQL trigger or rule that notifies a JBoss deployed J2EE application of a certain event. I was hoping that pljava would work, but for some -yet unknown to me- reason, it does not work on my Debian AMD64 with Sun 1.5.0-7 JVM. Does anyone have an (working???) example or a pointer to an example of how to do this? TIA -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl
Hi Markus, On Thu, 2006-06-22 at 13:04 +0200, Markus Schaber wrote: > Hi, Hoost, > > Joost Kraaijeveld wrote: > > > I want a PostgreSQL trigger or rule that notifies a JBoss deployed J2EE > > application of a certain event. > > > > I was hoping that pljava would work, but for some -yet unknown to me- > > reason, it does not work on my Debian AMD64 with Sun 1.5.0-7 JVM. > > > > Does anyone have an (working???) example or a pointer to an example of > > how to do this? > > Hmm, did you try the GCJ-based pljava variant? No, I did not. As far as I know, I *must* use the Sun JVM for JBoss, and I don't know if and how I can mix the GJC and Sun Java environment. Is that possible with (almost) no hassle and readme's? > And, as an workaround, have an extra bean sitting in the JBoss that > LISTENs, and the trigger in SQL simply NOTIFYing it? Can you elaborate on that? What do you mean with LISTEN and NOTIFY? TIA -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl
Did you try the pl/java list ? Also there is pl/j which is much better designed for this. Dave On 22-Jun-06, at 6:59 AM, Joost Kraaijeveld wrote: > Hi, > > I want a PostgreSQL trigger or rule that notifies a JBoss deployed > J2EE > application of a certain event. > > I was hoping that pljava would work, but for some -yet unknown to me- > reason, it does not work on my Debian AMD64 with Sun 1.5.0-7 JVM. > > Does anyone have an (working???) example or a pointer to an example of > how to do this? > > TIA > > -- > Groeten, > > Joost Kraaijeveld > Askesis B.V. > Molukkenstraat 14 > 6524NB Nijmegen > tel: 024-3888063 / 06-51855277 > fax: 024-3608416 > web: www.askesis.nl > > ---------------------------(end of > broadcast)--------------------------- > TIP 1: if posting/reading through Usenet, please send an appropriate > subscribe-nomail command to majordomo@postgresql.org so that > your > message can get through to the mailing list cleanly >
On Thu, 2006-06-22 at 07:17 -0400, Dave Cramer wrote: > Did you try the pl/java list ? Yes, I did. Hence the "yet unknow to me." I am also looking at the source, but I am fairly convinced that I am bitten by the "zlib" bug, which results in a lot of work to get it working. Besides the work, it will also lead to "non apt-get installable" software which I do do not fancy in terms of support.... > Also there is pl/j which is much better designed for this. OK, I will look into that. Could you hint as to why it is much better designed? -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl
On 22-Jun-06, at 7:25 AM, Joost Kraaijeveld wrote: > On Thu, 2006-06-22 at 07:17 -0400, Dave Cramer wrote: >> Did you try the pl/java list ? > Yes, I did. Hence the "yet unknow to me." I am also looking at the > source, but I am fairly convinced that I am bitten by the "zlib" bug, > which results in a lot of work to get it working. Besides the work, it > will also lead to "non apt-get installable" software which I do do not > fancy in terms of support.... > >> Also there is pl/j which is much better designed for this. > OK, I will look into that. Could you hint as to why it is much better > designed? > pl/java uses JNI, and a JVM per connection, which also means that the JVM must run on the same machine as the server, both of these are showstoppers for me. On the other hand it is simple. pl-j uses an RPC mechanism to call the function remotely. This means that the JVM can be anywhere, and you don't need a 1-1 mapping of connections to JVM's I will warn you that it may be broken at the moment, but I'm fairly sure that Laszlo could be coerced into fixing it. Dave > > > > -- > Groeten, > > Joost Kraaijeveld > Askesis B.V. > Molukkenstraat 14 > 6524NB Nijmegen > tel: 024-3888063 / 06-51855277 > fax: 024-3608416 > web: www.askesis.nl >
Hi, Hoost, Joost Kraaijeveld wrote: > I want a PostgreSQL trigger or rule that notifies a JBoss deployed J2EE > application of a certain event. > > I was hoping that pljava would work, but for some -yet unknown to me- > reason, it does not work on my Debian AMD64 with Sun 1.5.0-7 JVM. > > Does anyone have an (working???) example or a pointer to an example of > how to do this? Hmm, did you try the GCJ-based pljava variant? And, as an workaround, have an extra bean sitting in the JBoss that LISTENs, and the trigger in SQL simply NOTIFYing it? HTH, Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org
Hi, Joost, Joost Kraaijeveld wrote: >>> Does anyone have an (working???) example or a pointer to an example of >>> how to do this? >> Hmm, did you try the GCJ-based pljava variant? > No, I did not. As far as I know, I *must* use the Sun JVM for JBoss, and > I don't know if and how I can mix the GJC and Sun Java environment. Is > that possible with (almost) no hassle and readme's? I guess that you want to use CORBA or Java Remote Interface between PostgreSQL and JBoss, and those should abstract between differend JVMs. >> And, as an workaround, have an extra bean sitting in the JBoss that >> LISTENs, and the trigger in SQL simply NOTIFYing it? > Can you elaborate on that? What do you mean with LISTEN and NOTIFY? http://www.postgresql.org/docs/8.1/interactive/sql-listen.html http://www.postgresql.org/docs/8.1/interactive/sql-notify.html HTH, Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org
Hi Markus, On Thu, 2006-06-22 at 13:34 +0200, Markus Schaber wrote: > Hi, Joost, > > Joost Kraaijeveld wrote: > > >>> Does anyone have an (working???) example or a pointer to an example of > >>> how to do this? > >> Hmm, did you try the GCJ-based pljava variant? > > No, I did not. As far as I know, I *must* use the Sun JVM for JBoss, and > > I don't know if and how I can mix the GJC and Sun Java environment. Is > > that possible with (almost) no hassle and readme's? > > I guess that you want to use CORBA or Java Remote Interface between > PostgreSQL and JBoss, and those should abstract between differend JVMs. > > >> And, as an workaround, have an extra bean sitting in the JBoss that > >> LISTENs, and the trigger in SQL simply NOTIFYing it? > > Can you elaborate on that? What do you mean with LISTEN and NOTIFY? > > http://www.postgresql.org/docs/8.1/interactive/sql-listen.html > http://www.postgresql.org/docs/8.1/interactive/sql-notify.html Although I am tempted to try a Corba solution as you mentioned in another post (I am the maintainer (sort of) of the Cygwin port of MICO, an ORB), I have a NOTIFY/LISTEN example working and it looks OK. Thanks, -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl