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

Example 1 with DevNullSnapshotTarget

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

the class SnapshotWritePlan method createAllDevNullTargets.

/**
     * In case the deferred setup phase fails, some data targets may have not been created yet.
     * This method will close all existing data targets and replace all with DevNullDataTargets
     * so that snapshot can be drained.
     */
public void createAllDevNullTargets() {
    Map<Integer, SnapshotDataTarget> targets = Maps.newHashMap();
    final AtomicInteger numTargets = new AtomicInteger();
    for (Deque<SnapshotTableTask> tasksForSite : m_taskListsForHSIds.values()) {
        for (SnapshotTableTask task : tasksForSite) {
            // Close any created targets and replace them with DevNull, go web-scale
            if (task.getTarget(true) != null) {
                try {
                    task.getTarget().close();
                } catch (Exception e) {
                    SNAP_LOG.error("Failed closing data target after error", e);
                }
            }
            SnapshotDataTarget target = targets.get(task.m_table.getRelativeIndex());
            if (target == null) {
                target = new DevNullSnapshotTarget();
                final Runnable onClose = new TargetStatsClosure(target, task.m_table.getTypeName(), numTargets, m_snapshotRecord);
                target.setOnCloseHandler(onClose);
                targets.put(task.m_table.getRelativeIndex(), target);
                m_targets.add(target);
                numTargets.incrementAndGet();
            }
            task.setTarget(target);
        }
    }
}

Example 2 with DevNullSnapshotTarget

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

the class IndexSnapshotWritePlan method createTasksForTable.

/**
     * For each site, generate a task for each target it has for this table.
     */
private void createTasksForTable(Table table, Collection<IndexSnapshotRequestConfig.PartitionRanges> partitionRanges, Map<Integer, Long> pidToLocalHSIDs, AtomicInteger numTables, SnapshotRegistry.Snapshot snapshotRecord) {
    // no work on this node
    if (pidToLocalHSIDs.isEmpty()) {
        return;
    }
    // create a null data target
    final DevNullSnapshotTarget dataTarget = new DevNullSnapshotTarget();
    final Runnable onClose = new TargetStatsClosure(dataTarget, table.getTypeName(), numTables, snapshotRecord);
    dataTarget.setOnCloseHandler(onClose);
    m_targets.add(dataTarget);
    // go over all local sites, create a task for each source site
    for (IndexSnapshotRequestConfig.PartitionRanges partitionRange : partitionRanges) {
        Long localHSId = pidToLocalHSIDs.get(partitionRange.partitionId);
        // The partition may not exist on this node. If so, keep calm and carry on
        if (localHSId != null) {
            // based on the source partition, the predicate is different
            final SnapshotTableTask task = new SnapshotTableTask(table, new SnapshotDataFilter[0], createIndexExpressionForTable(table, partitionRange.ranges), false);
            task.setTarget(dataTarget);
            placeTask(task, Arrays.asList(localHSId));
        }
    }
}