Only for the MQ Java Client, and in that case they must be written in Java. Though this can just be a Java stub which invokes C code using JNI.
I had heard of one MQ customer that was seriously considering writing C stubs that used the Java invocation mechanisms to drive Java channel exits code. Whether they ever did it for real, or if it is apocryphal or not I don't know. I think this could be forced to work on some platforms, but on MVS I very much doubt it. In general channel exits will be written in C on the distributed platforms, though there's probably no real reason you couldn't use some other compiled language if you worked hard at it. On MVS (or OS/390, or z/OS if you like) the normal choice would be to write them in assembler, PL/X (if available - I wish IBM would release it), or C (typically the Systems Programming C dialect). Cheers Dave Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
