@Override
public Iterator<MarkedEdge> getEdgesToTarget(
final ApplicationScope scope, final SearchByEdgeType edgeType) {
ValidationUtils.validateApplicationScope(scope);
GraphValidation.validateSearchByEdgeType(edgeType);
final Id targetId = edgeType.getNode();
final String type = edgeType.getType();
final long maxTimestamp = edgeType.getMaxTimestamp();
final DirectedEdgeMeta directedEdgeMeta = DirectedEdgeMeta.fromTargetNode(targetId, type);
final Iterator<ShardEntryGroup> readShards =
edgeShardStrategy.getReadShards(scope, maxTimestamp, directedEdgeMeta);
return new ShardGroupColumnIterator(scope, directedEdgeMeta, shardGroupDeletion, readShards) {
@Override
protected Iterator<MarkedEdge> getIterator(final Collection<Shard> readShards) {
return shardedEdgeSerialization.getEdgesToTarget(
edgeColumnFamilies, scope, edgeType, readShards);
}
@Override
protected Iterator<MarkedEdge> getIteratorFullRange(final Collection<Shard> readShards) {
final SearchByEdgeType edgeTypeFullRange =
new SimpleSearchByEdgeType(
edgeType.getNode(),
edgeType.getType(),
Long.MAX_VALUE,
SearchByEdgeType.Order.DESCENDING,
Optional.absent(),
false);
return shardedEdgeSerialization.getEdgesToTarget(
edgeColumnFamilies, scope, edgeTypeFullRange, readShards);
}
};
}
@Override
public MutationBatch writeEdge(
final ApplicationScope scope, final MarkedEdge markedEdge, final UUID timestamp) {
ValidationUtils.validateApplicationScope(scope);
GraphValidation.validateEdge(markedEdge);
ValidationUtils.verifyTimeUuid(timestamp, "timestamp");
final long now = timeService.getCurrentTime();
final Id sourceNode = markedEdge.getSourceNode();
final Id targetNode = markedEdge.getTargetNode();
final String edgeType = markedEdge.getType();
final long edgeTimestamp = markedEdge.getTimestamp();
/** Source write */
final DirectedEdgeMeta sourceEdgeMeta = DirectedEdgeMeta.fromSourceNode(sourceNode, edgeType);
final Collection<Shard> sourceWriteShards =
edgeShardStrategy.getWriteShards(scope, edgeTimestamp, sourceEdgeMeta).getWriteShards(now);
final MutationBatch batch =
shardedEdgeSerialization.writeEdgeFromSource(
edgeColumnFamilies, scope, markedEdge, sourceWriteShards, sourceEdgeMeta, timestamp);
/** Source with target type write */
final DirectedEdgeMeta sourceTargetTypeEdgeMeta =
DirectedEdgeMeta.fromSourceNodeTargetType(sourceNode, edgeType, targetNode.getType());
final Collection<Shard> sourceTargetTypeWriteShards =
edgeShardStrategy
.getWriteShards(scope, edgeTimestamp, sourceTargetTypeEdgeMeta)
.getWriteShards(now);
batch.mergeShallow(
shardedEdgeSerialization.writeEdgeFromSourceWithTargetType(
edgeColumnFamilies,
scope,
markedEdge,
sourceTargetTypeWriteShards,
sourceTargetTypeEdgeMeta,
timestamp));
/** Target write */
final DirectedEdgeMeta targetEdgeMeta = DirectedEdgeMeta.fromTargetNode(targetNode, edgeType);
final Collection<Shard> targetWriteShards =
edgeShardStrategy.getWriteShards(scope, edgeTimestamp, targetEdgeMeta).getWriteShards(now);
batch.mergeShallow(
shardedEdgeSerialization.writeEdgeToTarget(
edgeColumnFamilies, scope, markedEdge, targetWriteShards, targetEdgeMeta, timestamp));
/** Target with source type write */
final DirectedEdgeMeta targetSourceTypeEdgeMeta =
DirectedEdgeMeta.fromTargetNodeSourceType(targetNode, edgeType, sourceNode.getType());
final Collection<Shard> targetSourceTypeWriteShards =
edgeShardStrategy
.getWriteShards(scope, edgeTimestamp, targetSourceTypeEdgeMeta)
.getWriteShards(now);
batch.mergeShallow(
shardedEdgeSerialization.writeEdgeToTargetWithSourceType(
edgeColumnFamilies,
scope,
markedEdge,
targetSourceTypeWriteShards,
targetSourceTypeEdgeMeta,
timestamp));
/** Version write */
final DirectedEdgeMeta edgeVersionsMeta =
DirectedEdgeMeta.fromEdge(sourceNode, targetNode, edgeType);
final Collection<Shard> edgeVersionsShards =
edgeShardStrategy
.getWriteShards(scope, edgeTimestamp, edgeVersionsMeta)
.getWriteShards(now);
batch.mergeShallow(
shardedEdgeSerialization.writeEdgeVersions(
edgeColumnFamilies,
scope,
markedEdge,
edgeVersionsShards,
edgeVersionsMeta,
timestamp));
return batch;
}