使用MQ的Java存储过程

Question

I need to create a Java stored procedure in Oracle. I have used IBM's sample class for creating an MQ message from a simple class outside of Java EE environment. I have tested the class by itself and it is working.

My Oracle vesrion is 11i.

When I am trying to add the jars used in the simple application to load to Oralce along with my simple class, I am getting errors about class not found, even if same jars work with the test case. I am stuck with this for over a week and am desperately hoping that someone would be able to help me with it.

Kinds of errors I am getting are like this from -v flag with loadjava utility on the client

on line 326 / 327, you see this:

creating : class com/ibm/mq/jms/admin/AP loading : class com/ibm/mq/jms/admin/AP

and then at the end starting from line 6224 to end, it indicates that the above class can't be resolved:

com/ibm/mq/jms/admin/APRCXI: ORA-29534: referenced object xxxx.com/ibm/mq/jms/admin/AP could not be resolved com/ibm/mq/jms/admin/APSDX: ORA-29534: referenced object xxxx.com/ibm/mq/jms/admin/AP could not be resolved exiting : errors resolving class com/ibm/mq/jms/admin/AP

the command I used is:

c:\\Oracle\\product\\11.2.0\\client_1\\bin\\loadjava.bat -f -jarsasdbobjects -prependjarnames -stoponerror -u xxxx/yyyy@SID -v -resolve lib\\jms.jar lib\\com.ibm.mqjms.jar lib\\com.ibm.mq.jmqi.jar lib\\dhbcore.jar lib\\fscontext.jar src\\com\\test\\javasp\\mq\\JmsProducer.java

I also tried with -genmissing option with some additional jars ( list I found here ), but still get similar error for a different class.

Other issue with this that I am facing is that if I get an error and try to use the dropjava command from Oracle, it doesn't work either.

I also saw from this link, that this person was successful, but unfortunately, he/she didn't indicate how they used loadjava to load the jars.

If i can provide any other information, please let me know.

If anyoneone has any idea on how to get the Java Stored Procedure to use IBM MQ working with Oracle 11i, I would really appreciate the help.

Answer 1

Found a detailed answer in this blog entry. I tried it and it worked for me.

Answer 2

In Oracle there is no concept of CLASSPATH, so the standard MQ Client install is useless. You can only load the jars reference by your app within the database schema. Classes are resolved when loaded with the -r option. You can further on specify your own resolved using -r -Resolver (schemas). (check Oracle docs for exact format). So in effect the database schemas becomes the classpath.

Using Websphere MQ classes for Java poses a number of problems, you have to ensure that the Oracle JDK version is at an appropriate support level to connect to the chosen MQ server version. Check the system requirements for websphere MQ Vx.x. You should find IBM's web references. check the support for MQ classed for java.

I have such an issue at the moment trying to connect to Mq using Oracle 10 and JDK 1.4.2. I had to recompile my Java code using JDK 1.4.x. This does not work and I assume it is because I connect to MQ 7.0.1.7 which requires JRE 1.7 as minimum.