Examples with DatasetTupleTranslator org.apache.asterix.metadata.entitytupletranslators.DatasetTupleTranslator used on opensource projects

Example 6 with DatasetTupleTranslator

use of org.apache.asterix.metadata.entitytupletranslators.DatasetTupleTranslator in project asterixdb by apache.

the class MetadataNode method initializeDatasetIdFactory.

@Override
public void initializeDatasetIdFactory(JobId jobId) throws MetadataException, RemoteException {
    int mostRecentDatasetId = MetadataIndexImmutableProperties.FIRST_AVAILABLE_USER_DATASET_ID;
    try {
        String resourceName = MetadataPrimaryIndexes.DATASET_DATASET.getFile().getRelativePath();
        IIndex indexInstance = datasetLifecycleManager.get(resourceName);
        datasetLifecycleManager.open(resourceName);
        try {
            IIndexAccessor indexAccessor = indexInstance.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
            IIndexCursor rangeCursor = indexAccessor.createSearchCursor(false);
            DatasetTupleTranslator tupleReaderWriter = tupleTranslatorProvider.getDatasetTupleTranslator(false);
            IValueExtractor<Dataset> valueExtractor = new MetadataEntityValueExtractor<>(tupleReaderWriter);
            RangePredicate rangePred = new RangePredicate(null, null, true, true, null, null);
            indexAccessor.search(rangeCursor, rangePred);
            int datasetId;
            try {
                while (rangeCursor.hasNext()) {
                    rangeCursor.next();
                    final ITupleReference ref = rangeCursor.getTuple();
                    final Dataset ds = valueExtractor.getValue(jobId, ref);
                    datasetId = ds.getDatasetId();
                    if (mostRecentDatasetId < datasetId) {
                        mostRecentDatasetId = datasetId;
                    }
                }
            } finally {
                rangeCursor.close();
            }
        } finally {
            datasetLifecycleManager.close(resourceName);
        }
    } catch (HyracksDataException e) {
        throw new MetadataException(e);
    }
    DatasetIdFactory.initialize(mostRecentDatasetId);
}