Examples with NODE_SELECTION_NOT_SUPPORTED com.facebook.presto.spi.StandardErrorCode.NODE_SELECTION_NOT_SUPPORTED used on opensource projects

Example 1 with NODE_SELECTION_NOT_SUPPORTED

use of com.facebook.presto.spi.StandardErrorCode.NODE_SELECTION_NOT_SUPPORTED in project presto by prestodb.

the class NodePartitioningManager method getNodePartitioningMap.

public NodePartitionMap getNodePartitioningMap(Session session, PartitioningHandle partitioningHandle) {
    requireNonNull(session, "session is null");
    requireNonNull(partitioningHandle, "partitioningHandle is null");
    if (partitioningHandle.getConnectorHandle() instanceof SystemPartitioningHandle) {
        return ((SystemPartitioningHandle) partitioningHandle.getConnectorHandle()).getNodePartitionMap(session, nodeScheduler);
    }
    ConnectorId connectorId = partitioningHandle.getConnectorId().orElseThrow(() -> new IllegalArgumentException("No connector ID for partitioning handle: " + partitioningHandle));
    ConnectorBucketNodeMap connectorBucketNodeMap = getConnectorBucketNodeMap(session, partitioningHandle);
    // safety check for crazy partitioning
    checkArgument(connectorBucketNodeMap.getBucketCount() < 1_000_000, "Too many buckets in partitioning: %s", connectorBucketNodeMap.getBucketCount());
    List<InternalNode> bucketToNode;
    NodeSelectionStrategy nodeSelectionStrategy = connectorBucketNodeMap.getNodeSelectionStrategy();
    boolean cacheable;
    switch(nodeSelectionStrategy) {
        case HARD_AFFINITY:
            bucketToNode = getFixedMapping(connectorBucketNodeMap);
            cacheable = false;
            break;
        case SOFT_AFFINITY:
            bucketToNode = getFixedMapping(connectorBucketNodeMap);
            cacheable = true;
            break;
        case NO_PREFERENCE:
            bucketToNode = createArbitraryBucketToNode(nodeScheduler.createNodeSelector(session, connectorId).selectRandomNodes(getMaxTasksPerStage(session)), connectorBucketNodeMap.getBucketCount());
            cacheable = false;
            break;
        default:
            throw new PrestoException(NODE_SELECTION_NOT_SUPPORTED, format("Unsupported node selection strategy %s", nodeSelectionStrategy));
    }
    int[] bucketToPartition = new int[connectorBucketNodeMap.getBucketCount()];
    BiMap<InternalNode, Integer> nodeToPartition = HashBiMap.create();
    int nextPartitionId = 0;
    for (int bucket = 0; bucket < bucketToNode.size(); bucket++) {
        InternalNode node = bucketToNode.get(bucket);
        Integer partitionId = nodeToPartition.get(node);
        if (partitionId == null) {
            partitionId = nextPartitionId++;
            nodeToPartition.put(node, partitionId);
        }
        bucketToPartition[bucket] = partitionId;
    }
    List<InternalNode> partitionToNode = IntStream.range(0, nodeToPartition.size()).mapToObj(partitionId -> nodeToPartition.inverse().get(partitionId)).collect(toImmutableList());
    return new NodePartitionMap(partitionToNode, bucketToPartition, getSplitToBucket(session, partitioningHandle), cacheable);
}