#1 ClassNotFound: org.brownell.xml.aelfred2

[lee fellows]

Hi,

I am getting a ClassNotFound exception for
org.brownell.xml.aelfred2.SAXDriver when attempting to
run
Builder or XMLTest from the command line.

jdbc-se20.jar, jndi.jar, mysql.jar,
osage-1.0pre10.jar,quick.jar,
sax2.jar,util2.jar,utilities.jar and xerces_1_2.jar are
all in my
CLASSPATH. I am using Sun's jdk 1.3 an a RedHat 6.2
system.
Util2.jar is David Brownell's pre-GPL version of the
utilities.jar
with the class org.brownell.xml.aelfred2.SAXDriver.

I am attempting to use osage-1.0pre10 on a RedHat 6.2
system.

What am I missing?

Thank you.

[george w. stewart]

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Hi,

I suggest that you try to unjar and jar the brownell jar.
Don't use compression on the jar. I've read of problems on
RH using jars built on other systems. There was a report
recently on postgres jdbc list.

You can use the xerces jar by setting property
for "org.xml.sax.parser" to the xerces parser.

There no need for both Brownell's package and xerces. I
include Brownell's because it's much smaller.

Regards, george

[lee fellows]

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Hi George,

Thank you for your response. I tried unjaring and
rejaring the
utilities.jar and the util2.jar to no effect. I set the
property to the
xerces parser and everything worked. I have another
question,
however. Is there any documentation on how to develope the
the
class mapping xml files? Looking at the examples does not
answer
questions like how relations are defined, what are
legitimate parameters
in a relation declaration, etc? Any pointers would be
appreciated.

Thank you.

Lee Fellows

[george w. stewart]

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Hi Lee,

On rejaring, did you use -0 for no compression?

The examples do show relationships. There's a qjml schema
for the maps (maps.qjml). Unfortunately, you have will to
understand qjml to interpret it.

Regards, george

[lee fellows]

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Hi George,

Thank you. I will take a closer look at the maps.qjml
file to see if I understand what it is saying. I also have
the quick documentation on qjml to help.

Probably this should really go to the mailing list, but
here is one last
concern. I am using MySQL, which does not support
transactions. I followed the directions in the README file
to use the DBNoTransImpl class. I then ran Test and got a
TransactionNotInProgressException on a commit. Seems to me
this does not make sense: I know there is not a transaction
in progress. I specifically used the DBNoTransImpl because
MySQL does not support transactions. In looking at
net.sourceforge.osage.engine.DBNoTransImpl.java, I saw that
begin properly did nothing, but commit and rollback both
throw an exception. I would think that , like begin, they
would be empty methods. Am I misunderstanding something?

Thank you.

[george w. stewart]

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user_id=28717

Hi Lee,

I believe that the most current version of MySQL supports
transactions.

If your db doesn't support transactions, don't use commit.
If that's in Test.java, you can remove it. Use db.close()
to release the connections.

I think it's proper to throw exception when you try to use
commit with db that doesn't support transactions.

Regards, george

[lee fellows]

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Hi George,

Thank you. Its seems the most recent MySQL does support
transactions.
Whether good or bad, I do not know. I do know there was
alot of discussion against doing so. In any event, it is
immaterial as we are currently using version 3.22.32 which
does not.

Thank you.