Help with test case

Question

Hi,
I'm trying to produce a test case for a subtle problem, but can't get a
simple one to work :-(
I think I'm doing something wrong:
Source:
package kodo;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Properties;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import junit.framework.TestCase;
public class KodoTest1 extends TestCase
* @param id
public KodoTest1(String id)
super(id);
public void test1() throws Exception
PersistenceManagerFactory pmf = getFactory();
PersistenceManager pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
A a = new A();
a._b = new ArrayList();
pm.makePersistent(a);
Object aId = JDOHelper.getObjectId(a);
B b = new B();
b._parent = a;
a._b.add(b);
pm.currentTransaction().commit(); // looks good after this -- _b is
a ProxyLinkedList
pm.close();
pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
A aClone = (A) pm.getObjectById(aId, false);
assertNotNull(aClone);
Collection c = aClone._b;
assertNotNull(c); // fails
assertEquals(1,aClone._b.size());
pm.currentTransaction().commit();
private static PersistenceManagerFactory getFactory() throws Exception
InputStream propStream =
KodoTest1.class.getResourceAsStream("/kodo-local.properties");
Properties props = new Properties();
props.load(propStream);
return JDOHelper.getPersistenceManagerFactory(props);
package.jdo:
<?xml version="1.0"?>
<jdo>
<package name="kodo">
<class name="B"/>
<class name="A">
<field name="_b">
<collection element-type="B"/>
<extension vendor-name="kodo" key="inverse" value="_parent"/>
</field>
</class>
</package>
</jdo>
kodo-local.properties:
javax.jdo.option.RetainValues: true
javax.jdo.option.RestoreValues: true
javax.jdo.option.Optimistic: true
javax.jdo.option.NontransactionalWrite: false
javax.jdo.option.NontransactionalRead: true
javax.jdo.option.Multithreaded: true
javax.jdo.option.MsWait: 5000
javax.jdo.option.MinPool: 1
javax.jdo.option.MaxPool: 80
javax.jdo.option.IgnoreCache: false
javax.jdo.option.ConnectionUserName: tomd
javax.jdo.option.ConnectionURL: jdbc:oracle:thin:@holygrail:1521:db1
javax.jdo.option.ConnectionPassword: password
javax.jdo.option.ConnectionDriverName: oracle.jdbc.OracleDriver
javax.jdo.PersistenceManagerFactoryClass:
com.solarmetric.kodo.impl.jdbc.JDBCPersistenceManagerFactory
com.solarmetric.kodo.impl.jdbc.WarnOnPersistentTypeFailure: true
com.solarmetric.kodo.impl.jdbc.SequenceFactoryClass:
com.solarmetric.kodo.impl.jdbc.schema.DBSequenceFactory
com.solarmetric.kodo.impl.jdbc.FlatInheritanceMapping: true
com.solarmetric.kodo.impl.jdbc.AutoReturnTimeout: 10
#com.solarmetric.kodo.Logger:
#stdout
# (Kodo 2.4 license key)
com.solarmetric.kodo.LicenseKey: xxxxxxxxxxxxxxxxxxxxxxx
com.solarmetric.kodo.EnableQueryExtensions: false
com.solarmetric.kodo.DefaultFetchThreshold: -1
com.solarmetric.kodo.impl.jdbc.DictionaryProperties:NameTruncationVersion=1
com.solarmetric.kodo.impl.jdbc.UseBatchedStatements=false
com.solarmetric.kodo.impl.jdbc.StatementCacheMaxSize=1

Answer 1

You should not be directly accessing fields of PersistenceCapable
instances or should enhance as Persistence aware:
e.g. jdoc kodo.KodoTest1.
However, I strongly recommend against this. It is bad object oriented
design to be exposing internal variables so (wrap at the least in a
get method). And in JDO, can easily cause strange behavior if not
handled correctly as you see in your test case.
Btw, I would recommend against packaging in kodo as we may be moving
towards simplifying our package structures into kodo prefixed packages.
On Wed, 18 Jun 2003 20:11:45 +1000, Tom Davies wrote:
Hi,
I'm trying to produce a test case for a subtle problem, but can't get a
simple one to work :-(
I think I'm doing something wrong:
Source:
package kodo;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Properties;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import junit.framework.TestCase;
public class KodoTest1 extends TestCase {
* @param id
public KodoTest1(String id)
super(id);
public void test1() throws Exception
PersistenceManagerFactory pmf = getFactory(); PersistenceManager pm =
pmf.getPersistenceManager(); pm.currentTransaction().begin();
A a = new A();
a._b = new ArrayList();
pm.makePersistent(a);
Object aId = JDOHelper.getObjectId(a); B b = new B();
b._parent = a;
a._b.add(b);
pm.currentTransaction().commit(); // looks good after this -- _b is
a ProxyLinkedList
pm.close();
pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
A aClone = (A) pm.getObjectById(aId, false); assertNotNull(aClone);
Collection c = aClone._b;
assertNotNull(c); // fails
assertEquals(1,aClone._b.size());
pm.currentTransaction().commit();
private static PersistenceManagerFactory getFactory() throws Exception
InputStream propStream =
KodoTest1.class.getResourceAsStream("/kodo-local.properties");
Properties props = new Properties();
props.load(propStream);
return JDOHelper.getPersistenceManagerFactory(props);
package.jdo:
<?xml version="1.0"?>
<jdo>
<package name="kodo">
<class name="B"/>
<class name="A">
<field name="_b">
<collection element-type="B"/>
<extension vendor-name="kodo" key="inverse" value="_parent"/>
</field>
</class>
</package>
</jdo>
Steve Kim
[email protected]
SolarMetric Inc.
http://www.solarmetric.com