为了找到另一个问题,我的测试提出了以下代码。
public class TestPersistance {
private static final PersistenceManagerFactory PMF = JDOHelper.getPersistenceManagerFactory("datanucleus.properties");
public static final PersistenceManager pm = PMF.getPersistenceManager();
static final TestUserDataDB ud = new TestUserDataDB();
public static void main(String args[])
{
TestPersistance tp = new TestPersistance();
tp.createData();
}
@Test public void createData()
{
assertTrue("Null machined id at start", ud.machineId != null);
pm.currentTransaction().begin();
try
{
pm.makePersistent(ud);
}
finally
{
pm.currentTransaction().commit();
}
assertTrue("Null machined id at end", ud.machineId != null);
}
}
第二个断言失败的地方。IE。我要求持久化的对象正在被 makePersistent 调用更改。数据正在存储在数据库中。有任何想法吗?任何人都可以证实这一点。使用 jdo-api-3.0.jar datanucleus-core-2.2.0-release.jar datanucleus-enhancer-2.1.3.jar datanucleus-rdbms-2.2.0-release.jar mysql-connector-java-5.1.13.jar
在 Eclipse 中使用 MySql 数据库。
@PersistenceCapable
public class TestUserDataDB {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
public Long id;
@Persistent
public String userid = "test1";
@Persistent
public String machineId = "test2";
// local userid
@Persistent
public long uid = 1L;
@Persistent
public long systemTime = 123L;
public long chk = 1234L;
public long createTime = System.currentTimeMillis();
public TestUserDataDB()
{
}
@Override
public String toString() {
return "TestUserDataDB [chk=" + chk + ", createTime=" + createTime
+ ", id=" + id + ", machineId=" + machineId + ", systemTime="
+ systemTime + ", uid=" + uid + ", userid=" + userid + "]";
}
}
属性文件是
javax.jdo.PersistenceManagerFactoryClass=org.datanucleus.jdo.JDOPersistenceManagerFactory
datanucleus.metadata.validate=false
javax.jdo.option.ConnectionDriverName=com.mysql.jdbc.Driver
javax.jdo.option.ConnectionURL=jdbc:mysql://localhost/test
javax.jdo.option.ConnectionUserName=root
javax.jdo.option.ConnectionPassword=yeahRight
datanucleus.autoCreateSchema=true
datanucleus.validateTables=false
datanucleus.validateConstraints=false