Look at the code snippet below:
// entity class
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class ChildEnt {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
// @Extension(vendorName="datanucleus", key="gae.encoded-
pk",value="true")
private Key encodedKey;
private String info;
public Key getEncodedKey() {
return encodedKey;
}
public void setEncodedKey(Key encodedKey) {
this.encodedKey = encodedKey;
}
public String getInfo() {
return info;
}
public void setInfo(String info) {
this.info = info;
}
}
// transaction code
PersistenceManager pm = PMF.get().getPersistenceManager();
Key parkey = KeyFactory.createKey("Parent","P01");
ChildEnt e1 = new ChildEnt();
ChildEnt e2 = new ChildEnt();
ChildEnt e3 = new ChildEnt();
Key k1 = KeyFactory.createKey(parkey,ChildEnt.class.getSimpleName(),
1);
Key k2 = KeyFactory.createKey(parkey,ChildEnt.class.getSimpleName(),
2);
Key k3 = KeyFactory.createKey(parkey,ChildEnt.class.getSimpleName(),
3);
e1.setEncodedKey(k1);
e1.setInfo("info1");
e2.setEncodedKey(k2);
e2.setInfo("info2");
e3.setEncodedKey(k3);
e3.setInfo("info3");
pm.currentTransaction().begin();
pm.makePersistent(e1);
pm.makePersistent(e2);
pm.makePersistent(e3);
pm.currentTransaction().commit();
pm.close();
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