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Example 1 with TransactionAwareHTable

use of org.apache.tephra.hbase.TransactionAwareHTable in project phoenix by apache.

the class PhoenixTransactionalIndexer method getIndexUpdates.

private Collection<Pair<Mutation, byte[]>> getIndexUpdates(RegionCoprocessorEnvironment env, PhoenixIndexMetaData indexMetaData, Iterator<Mutation> mutationIterator, byte[] txRollbackAttribute) throws IOException {
    Transaction tx = indexMetaData.getTransaction();
    if (tx == null) {
        throw new NullPointerException("Expected to find transaction in metadata for " + env.getRegionInfo().getTable().getNameAsString());
    }
    boolean isRollback = txRollbackAttribute != null;
    boolean isImmutable = indexMetaData.isImmutableRows();
    ResultScanner currentScanner = null;
    TransactionAwareHTable txTable = null;
    // Collect up all mutations in batch
    Map<ImmutableBytesPtr, MultiMutation> mutations = new HashMap<ImmutableBytesPtr, MultiMutation>();
    Map<ImmutableBytesPtr, MultiMutation> findPriorValueMutations;
    if (isImmutable && !isRollback) {
        findPriorValueMutations = new HashMap<ImmutableBytesPtr, MultiMutation>();
    } else {
        findPriorValueMutations = mutations;
    }
    while (mutationIterator.hasNext()) {
        Mutation m = mutationIterator.next();
        // add the mutation to the batch set
        ImmutableBytesPtr row = new ImmutableBytesPtr(m.getRow());
        if (mutations != findPriorValueMutations && isDeleteMutation(m)) {
            addMutation(findPriorValueMutations, row, m);
        }
        addMutation(mutations, row, m);
    }
    // Collect the set of mutable ColumnReferences so that we can first
    // run a scan to get the current state. We'll need this to delete
    // the existing index rows.
    List<IndexMaintainer> indexMaintainers = indexMetaData.getIndexMaintainers();
    int estimatedSize = indexMaintainers.size() * 10;
    Set<ColumnReference> mutableColumns = Sets.newHashSetWithExpectedSize(estimatedSize);
    for (IndexMaintainer indexMaintainer : indexMaintainers) {
        // For transactional tables, we use an index maintainer
        // to aid in rollback if there's a KeyValue column in the index. The alternative would be
        // to hold on to all uncommitted index row keys (even ones already sent to HBase) on the
        // client side.
        Set<ColumnReference> allColumns = indexMaintainer.getAllColumns();
        mutableColumns.addAll(allColumns);
    }
    Collection<Pair<Mutation, byte[]>> indexUpdates = new ArrayList<Pair<Mutation, byte[]>>(mutations.size() * 2 * indexMaintainers.size());
    try {
        // this logic will work there too.
        if (!findPriorValueMutations.isEmpty()) {
            List<KeyRange> keys = Lists.newArrayListWithExpectedSize(mutations.size());
            for (ImmutableBytesPtr ptr : findPriorValueMutations.keySet()) {
                keys.add(PVarbinary.INSTANCE.getKeyRange(ptr.copyBytesIfNecessary()));
            }
            Scan scan = new Scan();
            // Project all mutable columns
            for (ColumnReference ref : mutableColumns) {
                scan.addColumn(ref.getFamily(), ref.getQualifier());
            }
            /*
                 * Indexes inherit the storage scheme of the data table which means all the indexes have the same
                 * storage scheme and empty key value qualifier. Note that this assumption would be broken if we start
                 * supporting new indexes over existing data tables to have a different storage scheme than the data
                 * table.
                 */
            byte[] emptyKeyValueQualifier = indexMaintainers.get(0).getEmptyKeyValueQualifier();
            // Project empty key value column
            scan.addColumn(indexMaintainers.get(0).getDataEmptyKeyValueCF(), emptyKeyValueQualifier);
            ScanRanges scanRanges = ScanRanges.create(SchemaUtil.VAR_BINARY_SCHEMA, Collections.singletonList(keys), ScanUtil.SINGLE_COLUMN_SLOT_SPAN, KeyRange.EVERYTHING_RANGE, null, true, -1);
            scanRanges.initializeScan(scan);
            TableName tableName = env.getRegion().getRegionInfo().getTable();
            HTableInterface htable = env.getTable(tableName);
            txTable = new TransactionAwareHTable(htable);
            txTable.startTx(tx);
            // For rollback, we need to see all versions, including
            // the last committed version as there may be multiple
            // checkpointed versions.
            SkipScanFilter filter = scanRanges.getSkipScanFilter();
            if (isRollback) {
                filter = new SkipScanFilter(filter, true);
                tx.setVisibility(VisibilityLevel.SNAPSHOT_ALL);
            }
            scan.setFilter(filter);
            currentScanner = txTable.getScanner(scan);
        }
        if (isRollback) {
            processRollback(env, indexMetaData, txRollbackAttribute, currentScanner, tx, mutableColumns, indexUpdates, mutations);
        } else {
            processMutation(env, indexMetaData, txRollbackAttribute, currentScanner, tx, mutableColumns, indexUpdates, mutations, findPriorValueMutations);
        }
    } finally {
        if (txTable != null)
            txTable.close();
    }
    return indexUpdates;
}
Also used : MultiMutation(org.apache.phoenix.hbase.index.MultiMutation) HashMap(java.util.HashMap) KeyRange(org.apache.phoenix.query.KeyRange) ArrayList(java.util.ArrayList) HTableInterface(org.apache.hadoop.hbase.client.HTableInterface) SkipScanFilter(org.apache.phoenix.filter.SkipScanFilter) Pair(org.apache.hadoop.hbase.util.Pair) TransactionAwareHTable(org.apache.tephra.hbase.TransactionAwareHTable) ResultScanner(org.apache.hadoop.hbase.client.ResultScanner) ImmutableBytesPtr(org.apache.phoenix.hbase.index.util.ImmutableBytesPtr) ScanRanges(org.apache.phoenix.compile.ScanRanges) TableName(org.apache.hadoop.hbase.TableName) Transaction(org.apache.tephra.Transaction) Scan(org.apache.hadoop.hbase.client.Scan) Mutation(org.apache.hadoop.hbase.client.Mutation) MultiMutation(org.apache.phoenix.hbase.index.MultiMutation) ColumnReference(org.apache.phoenix.hbase.index.covered.update.ColumnReference)

Aggregations

ArrayList (java.util.ArrayList)1 HashMap (java.util.HashMap)1 TableName (org.apache.hadoop.hbase.TableName)1 HTableInterface (org.apache.hadoop.hbase.client.HTableInterface)1 Mutation (org.apache.hadoop.hbase.client.Mutation)1 ResultScanner (org.apache.hadoop.hbase.client.ResultScanner)1 Scan (org.apache.hadoop.hbase.client.Scan)1 Pair (org.apache.hadoop.hbase.util.Pair)1 ScanRanges (org.apache.phoenix.compile.ScanRanges)1 SkipScanFilter (org.apache.phoenix.filter.SkipScanFilter)1 MultiMutation (org.apache.phoenix.hbase.index.MultiMutation)1 ColumnReference (org.apache.phoenix.hbase.index.covered.update.ColumnReference)1 ImmutableBytesPtr (org.apache.phoenix.hbase.index.util.ImmutableBytesPtr)1 KeyRange (org.apache.phoenix.query.KeyRange)1 Transaction (org.apache.tephra.Transaction)1 TransactionAwareHTable (org.apache.tephra.hbase.TransactionAwareHTable)1