public TitanProperty setProperty(TitanVertex vertex, final TitanKey key, Object value) {
Preconditions.checkNotNull(key);
Preconditions.checkArgument(
key.isUnique(Direction.OUT), "Not an out-unique key: %s", key.getName());
Lock uniqueLock = FakeLock.INSTANCE;
try {
if (config.hasVerifyUniqueness()) {
// Acquire uniqueness lock, remove and add
uniqueLock = getUniquenessLock(vertex, key, value);
uniqueLock.lock();
vertex.removeProperty(key);
} else {
// Only delete in-memory
InternalVertex v = (InternalVertex) vertex;
for (InternalRelation r :
v.it()
.getAddedRelations(
new Predicate<InternalRelation>() {
@Override
public boolean apply(@Nullable InternalRelation p) {
return p.getType().equals(key);
}
})) {
r.remove();
}
}
return addPropertyInternal(vertex, key, value);
} finally {
uniqueLock.unlock();
}
}
private void connectRelation(InternalRelation r) {
for (int i = 0; i < r.getLen(); i++) {
boolean success = r.getVertex(i).addRelation(r);
if (!success) throw new AssertionError("Could not connect relation: " + r);
}
addedRelations.add(r);
if (isVertexIndexProperty(r)) newVertexIndexEntries.add((TitanProperty) r);
}
public void removeRelation(InternalRelation relation) {
Preconditions.checkArgument(!relation.isRemoved());
relation = relation.it();
// Delete from Vertex
for (int i = 0; i < relation.getLen(); i++) {
relation.getVertex(i).removeRelation(relation);
}
// Update transaction data structures
if (relation.isNew()) {
addedRelations.remove(relation);
if (isVertexIndexProperty(relation)) newVertexIndexEntries.remove((TitanProperty) relation);
} else {
Preconditions.checkArgument(relation.isLoaded());
if (deletedRelations == EMPTY_DELETED_RELATIONS) {
if (config.isSingleThreaded()) {
deletedRelations = new HashMap<Long, InternalRelation>();
} else {
synchronized (this) {
if (deletedRelations == EMPTY_DELETED_RELATIONS)
deletedRelations = new ConcurrentHashMap<Long, InternalRelation>();
}
}
}
deletedRelations.put(Long.valueOf(relation.getID()), relation);
}
}
private Entry serialize(StandardTitanGraph graph, TitanEdge e, int pos) {
EdgeSerializer edgeSerializer = graph.getEdgeSerializer();
InternalRelation r = (InternalRelation) e;
return edgeSerializer.writeRelation(r, pos, r.tx());
}