Examples with SnapshotDataFilter org.voltdb.SnapshotDataFilter used on opensource projects

Example 1 with SnapshotDataFilter

use of org.voltdb.SnapshotDataFilter in project voltdb by VoltDB.

the class CSVSnapshotWritePlan method createSetup.

@Override
public Callable<Boolean> createSetup(String file_path, String pathType, String file_nonce, long txnId, Map<Integer, Long> partitionTransactionIds, JSONObject jsData, SystemProcedureExecutionContext context, final VoltTable result, ExtensibleSnapshotDigestData extraSnapshotData, SiteTracker tracker, HashinatorSnapshotData hashinatorData, long timestamp) {
    assert (SnapshotSiteProcessor.ExecutionSitesCurrentlySnapshotting.isEmpty());
    /*
         * List of partitions to include if this snapshot is
         * going to be deduped. Attempts to break up the work
         * by seeding and RNG selecting
         * a random replica to do the work. Will not work in failure
         * cases, but we don't use dedupe when we want durability.
         */
    List<Long> sitesToInclude = CSVSnapshotWritePlan.computeDedupedLocalSites(txnId, tracker);
    // If there's no work to do on this host, just claim success and get out:
    if (sitesToInclude.isEmpty() && !tracker.isFirstHost()) {
        return null;
    }
    final SnapshotRequestConfig config = new SnapshotRequestConfig(jsData, context.getDatabase());
    final AtomicInteger numTables = new AtomicInteger(config.tables.length);
    final SnapshotRegistry.Snapshot snapshotRecord = SnapshotRegistry.startSnapshot(txnId, context.getHostId(), file_path, file_nonce, SnapshotFormat.CSV, config.tables);
    boolean noTargetsCreated = true;
    final ArrayList<SnapshotTableTask> partitionedSnapshotTasks = new ArrayList<SnapshotTableTask>();
    final ArrayList<SnapshotTableTask> replicatedSnapshotTasks = new ArrayList<SnapshotTableTask>();
    for (final Table table : config.tables) {
        /*
             * For a deduped csv snapshot, only produce the replicated tables on the "leader"
             * host.
             */
        if (table.getIsreplicated() && !tracker.isFirstHost()) {
            snapshotRecord.removeTable(table.getTypeName());
            // We'll expect one less table in the global table count
            // in order to be done, too (ENG-4802)
            numTables.decrementAndGet();
            continue;
        }
        List<SnapshotDataFilter> filters = new ArrayList<SnapshotDataFilter>();
        filters.add(new CSVSnapshotFilter(CatalogUtil.getVoltTable(table), ',', null));
        final SnapshotTableTask task = new SnapshotTableTask(table, filters.toArray(new SnapshotDataFilter[filters.size()]), null, false);
        if (table.getIsreplicated()) {
            replicatedSnapshotTasks.add(task);
        } else {
            partitionedSnapshotTasks.add(task);
        }
        noTargetsCreated = false;
        result.addRow(context.getHostId(), CoreUtils.getHostnameOrAddress(), table.getTypeName(), "SUCCESS", "");
    }
    if (noTargetsCreated) {
        SnapshotRegistry.discardSnapshot(snapshotRecord);
    }
    // CSV snapshots do the partitioned work only on the specified sites for de-duping,
    // but since we've pre-filtered the replicated task list to only contain entries on
    // one node, we can go ahead and distribute them across all of the sites on that node.
    placePartitionedTasks(partitionedSnapshotTasks, sitesToInclude);
    placeReplicatedTasks(replicatedSnapshotTasks, tracker.getSitesForHost(context.getHostId()));
    // All IO work will be deferred and be run on the dedicated snapshot IO thread
    return createDeferredSetup(file_path, pathType, file_nonce, config.tables, txnId, partitionTransactionIds, context, extraSnapshotData, timestamp, numTables, snapshotRecord, partitionedSnapshotTasks, replicatedSnapshotTasks);
}