Here is my test case and with output :
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse
resp) throws IOException {
PrintWriter out = resp.getWriter();
out.println("debug here..." + new Date());
TestEntity entity = new TestEntity();
entity.setValues("test", "test again");
entity.print("Before Persisting");
PersistenceManager pm = pmf.getPersistenceManager();
pm.makePersistent(entity);
entity.print("After Persisting");
entity = pm.detachCopy(entity);
entity.print("After Detaching");
pm.close();
}
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable = "true")
class TestEntity implements Serializable {
@Persistent(primaryKey = "true")
private String ID = "test";
@Persistent
private String Val;
@NotPersistent
private String Value;
void setValues(String val, String value) {
this.Val = val;
this.Value = value;
}
void print(String str) {
System.err.println(str + ": " + this.Val + ", " + this.Value);
}
}
========= OUTPUT ==========
Before Persisting: test, test again
After Persisting: test, test again
After Detaching: test, null
why persistent manager removes non-persistent values after detaching a
PersistentCapable entity ?
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