Question

Problem loading the derby JDBC driver in ant script

Asked by: pdd

Hi experts.

I'm trying to build a simple ANT script that connects to a derby database (network server, not embedded) and then executes a  sql script.

here is my xml so far:
 <target name="create db structure">
<sql
    driver="org.apache.derby.jdbc.ClientDriver"
    url="jdbc:derby://localhost:1527/network"
userid=""
password=""
    src="db.sql"
/>
</target>

The error i get is:
BUILD FAILED
D:\JAVA\projects\network\build.xml:28: Class Not Found: JDBC driver org.apache.derby.jdbc.ClientDriver could not be loaded

Any idea how to fix this?

thanks

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Asked On
2009-11-02 at 15:49:22ID24865714
Tags

ant

,

derby

,

java

Topics

PHP Scripting Language

,

Java Programming Language

,

J2EE

Participating Experts
1
Points
250
Comments
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Answers

 

by: jb1devPosted on 2009-11-02 at 16:02:37ID: 25725063

Do you need to set a classpath pointing to the jar file containing the class driver org.apache.derby.jdbc.ClientDriver?

 

by: jb1devPosted on 2009-11-02 at 16:04:00ID: 25725067

E.g. http://old.nabble.com/Handel-failure-in-sql-tag-td16985551.html

<sql classpath="sql/${jdbc.jar}"

(Or wherever your jar is located...)

 

by: pddPosted on 2009-11-02 at 16:15:40ID: 25725127

now that was easy. but then again, i only started to learn today about this stuff :)

one more thing if could answer, how can i skip the userid & password attribute ?
if i set it to an empty string i get an error. if i delete it i also get an error.
what if i have a database without password ?

 

by: pddPosted on 2009-11-02 at 16:16:02ID: 31649166

thanks

 

by: jb1devPosted on 2009-11-02 at 16:33:41ID: 25725217

That I don't know about, you might want to start a different question, or review the documentation for your driver. (Is that behavior driver specific? Does an Exception come up through the jdbc driver? Stacktrace? Does derby allow passwordless login?) Your original error was general Java knowledge, not finding a class means a bad classpath usually. But these other questions seem pretty specific to ant/sql/driver which I am not as familiar with, sorry.









 

by: jb1devPosted on 2009-11-02 at 16:36:00ID: 25725222

Though if you add the exception you are seeing, I can still take a look.

 

by: pddPosted on 2009-11-02 at 16:38:26ID: 25725229

derby server allows passwordless login, i've used it from command line.

will read more on the documentation and post a new question if nothing comes up.

thanks again for your answer.

 

by: pddPosted on 2009-11-02 at 16:41:29ID: 25725250

if an empty pass or user:
BUILD FAILED
D:\JAVA\projects\network\build.xml:30: java.sql.SQLNonTransientConnectionException: User id length (0) is outside the range of 1 to 255.

if no user or pass attribute set:
BUILD FAILED
D:\JAVA\projects\network\build.xml:28: UserId attribute must be set!

 

by: jb1devPosted on 2009-11-02 at 16:54:45ID: 25725299

You seem to be having the same problem as this person:
http://mail-archives.apache.org/mod_mbox/db-derby-user/200806.mbox/%3C7b813ada0806270529t6767ad58hefe0b9462f2b3a8d@mail.gmail.com%3E

Which if it's the same root cause is that (according to that post) the implementation is calling:
DriverManager.getConnection(jdbcURL, user, password);
Instead of:
DriverManager.getConnection(jdbcURL);

They seem to have found a workaround posted at the very end, which is to just supply dummy user and password.


 

by: pddPosted on 2009-11-03 at 00:03:06ID: 25726828

i don't know how i didn't managed to find this.

thanks a lot.
it fixed my problem.

20120131-EE-VQP-002

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