List of acquireEdgeLock() Examples

Examples of acquireEdgeLock()

com.thinkaurelius.titan.diskstorage.BackendTransaction.acquireEdgeLock()

Acquires a lock for the key-column pair on the edge store which ensures that nobody else can take a lock on that respective entry for the duration of this lock (but somebody could potentially still overwrite the key-value entry without taking a lock). The expectedValue defines the value expected to match the value at the time the lock is acquired (or null if it is expected that the key-column pair does not exist).

If this method is called multiple times with the same key-column pair in the same transaction, all but the first invocation are ignored.

The lock has to be released when the transaction closes (commits or aborts). @param key Key on which to lock @param column Column the column on which to lock @param expectedValue The expected value for the specified key-column pair on which to lock. Null if it is expected that the pair does not exist

                            if (pos == 0 || !del.isLoop()) mutations.put(vertex, del);
                            Direction dir = EdgeDirection.fromPosition(pos);
                            if (acquireLocks && del.getType().isUnique(dir) &&
                                    ((InternalType) del.getType()).uniqueLock(dir)) {
                                Entry entry = edgeSerializer.writeRelation(del, pos, tx);
                                mutator.acquireEdgeLock(IDHandler.getKey(vertex.getID()), entry.getColumn(), entry.getValue());
                            }
                        }
                        //Update Indexes
                        if (del.isProperty()) {
                            if (acquireLocks) indexSerializer.lockKeyedProperty((TitanProperty) del, mutator);

                            if (pos == 0 || !relation.isLoop()) mutations.put(vertex, relation);
                            Direction dir = EdgeDirection.fromPosition(pos);
                            if (acquireLocks && relation.getType().isUnique(dir) && !vertex.isNew()
                                    && ((InternalType) relation.getType()).uniqueLock(dir)) {
                                Entry entry = edgeSerializer.writeRelation(relation, pos, tx);
                                mutator.acquireEdgeLock(IDHandler.getKey(vertex.getID()), entry.getColumn(), null);
                            }
                        }
                    }
                    //Update Indexes
                    if (relation.isProperty()) {

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Examples of acquireEdgeLock()

Examples of com.thinkaurelius.titan.diskstorage.BackendTransaction.acquireEdgeLock()

Examples of com.thinkaurelius.titan.diskstorage.BackendTransaction.acquireEdgeLock()