public void apply(InternalObjectContainer container) {
final Queries queries = Db4oMBeans.newQueriesMBean(container);
final CommonConfiguration config =
Db4oLegacyConfigurationBridge.asCommonConfiguration(container.configure());
config
.diagnostic()
.addListener(
new DiagnosticListener() {
public void onDiagnostic(Diagnostic d) {
if (d instanceof LoadedFromClassIndex) {
queries.notifyClassIndexScan((LoadedFromClassIndex) d);
}
}
});
final EventRegistry events = EventRegistryFactory.forObjectContainer(container);
events
.queryStarted()
.addListener(
new EventListener4<QueryEventArgs>() {
public void onEvent(Event4<QueryEventArgs> e, QueryEventArgs args) {
queries.notifyQueryStarted();
}
});
events
.queryFinished()
.addListener(
new EventListener4<QueryEventArgs>() {
public void onEvent(Event4<QueryEventArgs> e, QueryEventArgs args) {
queries.notifyQueryFinished();
}
});
}
/** internal method, public for implementation reasons. */
public void apply(final InternalObjectContainer objectContainer) {
if (objectContainer.isClient()) {
throw new IllegalStateException(
getClass().getName() + " should be configured on the server.");
}
EventRegistryFactory.forObjectContainer(objectContainer)
.committing()
.addListener(
new EventListener4() {
private FieldMetadata _fieldMetaData;
private void ensureSingleOccurence(Transaction trans, ObjectInfoCollection col) {
final Iterator4 i = col.iterator();
while (i.moveNext()) {
final ObjectInfo objectInfo = (ObjectInfo) i.current();
if (reflectClass() != reflectorFor(trans, objectInfo.getObject())) continue;
final Object obj = objectFor(trans, objectInfo);
Object fieldValue = fieldMetadata().getOn(trans, obj);
if (fieldValue == null) {
continue;
}
BTreeRange range = fieldMetadata().search(trans, fieldValue);
if (range.size() > 1) {
throw new UniqueFieldValueConstraintViolationException(
classMetadata().getName(), fieldMetadata().getName());
}
}
}
private boolean isClassMetadataAvailable() {
return null != classMetadata();
}
private FieldMetadata fieldMetadata() {
if (_fieldMetaData != null) {
return _fieldMetaData;
}
_fieldMetaData = classMetadata().fieldMetadataForName(_fieldName);
return _fieldMetaData;
}
private ClassMetadata classMetadata() {
return objectContainer.classMetadataForReflectClass(reflectClass());
}
private ReflectClass reflectClass() {
return ReflectorUtils.reflectClassFor(objectContainer.reflector(), _clazz);
}
public void onEvent(Event4 e, EventArgs args) {
if (!isClassMetadataAvailable()) {
return;
}
CommitEventArgs commitEventArgs = (CommitEventArgs) args;
Transaction trans = (Transaction) commitEventArgs.transaction();
ensureSingleOccurence(trans, commitEventArgs.added());
ensureSingleOccurence(trans, commitEventArgs.updated());
}
private Object objectFor(Transaction trans, ObjectInfo info) {
int id = (int) info.getInternalID();
HardObjectReference ref = HardObjectReference.peekPersisted(trans, id, 1);
return ref._object;
}
});
}