Examples with ShardedHBaseQueueStrategy co.cask.cdap.data2.transaction.queue.hbase.ShardedHBaseQueueStrategy used on opensource projects

Example 1 with ShardedHBaseQueueStrategy

use of co.cask.cdap.data2.transaction.queue.hbase.ShardedHBaseQueueStrategy in project cdap by caskdata.

the class HBaseQueueClientFactory method createConsumer.

@Override
public QueueConsumer createConsumer(final QueueName queueName, final ConsumerConfig consumerConfig, int numGroups) throws IOException {
    final HBaseQueueAdmin admin = ensureTableExists(queueName);
    try {
        final long groupId = consumerConfig.getGroupId();
        // A callback for create a list of HBaseQueueConsumer
        // based on the current queue consumer state of the given group
        Callable<List<HBaseQueueConsumer>> consumerCreator = new Callable<List<HBaseQueueConsumer>>() {

            @Override
            public List<HBaseQueueConsumer> call() throws Exception {
                List<HBaseConsumerState> states;
                try (HBaseConsumerStateStore stateStore = admin.getConsumerStateStore(queueName)) {
                    TransactionExecutor txExecutor = Transactions.createTransactionExecutor(txExecutorFactory, stateStore);
                    // Find all consumer states for consumers that need to be created based on current state
                    states = txExecutor.execute(new Callable<List<HBaseConsumerState>>() {

                        @Override
                        public List<HBaseConsumerState> call() throws Exception {
                            List<HBaseConsumerState> consumerStates = Lists.newArrayList();
                            HBaseConsumerState state = stateStore.getState(groupId, consumerConfig.getInstanceId());
                            if (state.getPreviousBarrier() == null) {
                                // Old HBase consumer (Salted based, not sharded)
                                consumerStates.add(state);
                                return consumerStates;
                            }
                            // Find the smallest start barrier that has something to consume for this instance.
                            // It should always exists since we assume the queue is configured before this method is called
                            List<QueueBarrier> queueBarriers = stateStore.getAllBarriers(groupId);
                            if (queueBarriers.isEmpty()) {
                                throw new IllegalStateException(String.format("No consumer information available. Queue: %s, GroupId: %d, InstanceId: %d", queueName, groupId, consumerConfig.getInstanceId()));
                            }
                            QueueBarrier startBarrier = Iterables.find(Lists.reverse(queueBarriers), new Predicate<QueueBarrier>() {

                                @Override
                                public boolean apply(QueueBarrier barrier) {
                                    return barrier.getGroupConfig().getGroupSize() > consumerConfig.getInstanceId() && stateStore.isAllConsumed(consumerConfig, barrier.getStartRow());
                                }
                            }, queueBarriers.get(0));
                            int groupSize = startBarrier.getGroupConfig().getGroupSize();
                            for (int i = consumerConfig.getInstanceId(); i < groupSize; i += consumerConfig.getGroupSize()) {
                                consumerStates.add(stateStore.getState(groupId, i));
                            }
                            return consumerStates;
                        }
                    });
                }
                List<HBaseQueueConsumer> consumers = Lists.newArrayList();
                for (HBaseConsumerState state : states) {
                    QueueType queueType = (state.getPreviousBarrier() == null) ? QueueType.QUEUE : QueueType.SHARDED_QUEUE;
                    HTable hTable = createHTable(admin.getDataTableId(queueName, queueType));
                    int distributorBuckets = getDistributorBuckets(hTable.getTableDescriptor());
                    HBaseQueueStrategy strategy = (state.getPreviousBarrier() == null) ? new SaltedHBaseQueueStrategy(hBaseTableUtil, distributorBuckets) : new ShardedHBaseQueueStrategy(hBaseTableUtil, distributorBuckets);
                    consumers.add(queueUtil.getQueueConsumer(cConf, hTable, queueName, state, admin.getConsumerStateStore(queueName), strategy));
                }
                return consumers;
            }
        };
        return new SmartQueueConsumer(queueName, consumerConfig, consumerCreator);
    } catch (Exception e) {
        // If there is exception, nothing much can be done here besides propagating
        Throwables.propagateIfPossible(e);
        throw new IOException(e);
    }
}

Example 2 with ShardedHBaseQueueStrategy

use of co.cask.cdap.data2.transaction.queue.hbase.ShardedHBaseQueueStrategy in project cdap by caskdata.

the class HBaseQueueDebugger method scanQueue.

private void scanQueue(TransactionExecutor txExecutor, HBaseConsumerStateStore stateStore, QueueName queueName, QueueBarrier start, @Nullable QueueBarrier end, final QueueStatistics outStats) throws Exception {
    final byte[] queueRowPrefix = QueueEntryRow.getQueueRowPrefix(queueName);
    ConsumerGroupConfig groupConfig = start.getGroupConfig();
    printProgress("Got consumer group config: %s\n", groupConfig);
    HBaseQueueAdmin admin = queueClientFactory.getQueueAdmin();
    TableId tableId = admin.getDataTableId(queueName, QueueConstants.QueueType.SHARDED_QUEUE);
    HTable hTable = queueClientFactory.createHTable(tableId);
    printProgress("Looking at HBase table: %s\n", Bytes.toString(hTable.getTableName()));
    final byte[] stateColumnName = Bytes.add(QueueEntryRow.STATE_COLUMN_PREFIX, Bytes.toBytes(groupConfig.getGroupId()));
    int distributorBuckets = queueClientFactory.getDistributorBuckets(hTable.getTableDescriptor());
    ShardedHBaseQueueStrategy queueStrategy = new ShardedHBaseQueueStrategy(tableUtil, distributorBuckets);
    ScanBuilder scan = tableUtil.buildScan();
    scan.setStartRow(start.getStartRow());
    if (end != null) {
        scan.setStopRow(end.getStartRow());
    } else {
        scan.setStopRow(QueueEntryRow.getQueueEntryRowKey(queueName, Long.MAX_VALUE, Integer.MAX_VALUE));
    }
    // Needs to include meta column for row that doesn't have state yet.
    scan.addColumn(QueueEntryRow.COLUMN_FAMILY, QueueEntryRow.META_COLUMN);
    scan.addColumn(QueueEntryRow.COLUMN_FAMILY, stateColumnName);
    // Don't do block cache for debug tool. We don't want old blocks get cached
    scan.setCacheBlocks(false);
    scan.setMaxVersions(1);
    printProgress("Scanning section with scan: %s\n", scan.toString());
    List<Integer> instanceIds = Lists.newArrayList();
    if (groupConfig.getDequeueStrategy() == DequeueStrategy.FIFO) {
        instanceIds.add(0);
    } else {
        for (int instanceId = 0; instanceId < groupConfig.getGroupSize(); instanceId++) {
            instanceIds.add(instanceId);
        }
    }
    final int rowsCache = Integer.parseInt(System.getProperty(PROP_ROWS_CACHE, "100000"));
    for (final int instanceId : instanceIds) {
        printProgress("Processing instance %d", instanceId);
        ConsumerConfig consConfig = new ConsumerConfig(groupConfig, instanceId);
        final QueueScanner scanner = queueStrategy.createScanner(consConfig, hTable, scan.build(), rowsCache);
        try {
            txExecutor.execute(new TransactionExecutor.Procedure<HBaseConsumerStateStore>() {

                @Override
                public void apply(HBaseConsumerStateStore input) throws Exception {
                    ImmutablePair<byte[], Map<byte[], byte[]>> result;
                    while ((result = scanner.next()) != null) {
                        byte[] rowKey = result.getFirst();
                        Map<byte[], byte[]> columns = result.getSecond();
                        visitRow(outStats, input.getTransaction(), rowKey, columns.get(stateColumnName), queueRowPrefix.length);
                        if (showProgress() && outStats.getTotal() % rowsCache == 0) {
                            System.out.printf("\rProcessing instance %d: %s", instanceId, outStats.getReport(showTxTimestampOnly()));
                        }
                    }
                }
            }, stateStore);
        } catch (TransactionFailureException e) {
            // Ignore transaction not in progress exception as it's caused by short TX timeout on commit
            if (!(Throwables.getRootCause(e) instanceof TransactionNotInProgressException)) {
                throw Throwables.propagate(e);
            }
        }
        printProgress("\rProcessing instance %d: %s\n", instanceId, outStats.getReport(showTxTimestampOnly()));
    }
}

Example 3 with ShardedHBaseQueueStrategy

use of co.cask.cdap.data2.transaction.queue.hbase.ShardedHBaseQueueStrategy in project cdap by caskdata.

the class HBaseQueueClientFactory method createProducer.

@Override
public QueueProducer createProducer(QueueName queueName, QueueMetrics queueMetrics) throws IOException {
    HBaseQueueAdmin admin = ensureTableExists(queueName);
    try {
        final List<ConsumerGroupConfig> groupConfigs = Lists.newArrayList();
        try (HBaseConsumerStateStore stateStore = admin.getConsumerStateStore(queueName)) {
            Transactions.createTransactionExecutor(txExecutorFactory, stateStore).execute(new Subroutine() {

                @Override
                public void apply() throws Exception {
                    stateStore.getLatestConsumerGroups(groupConfigs);
                }
            });
        }
        Preconditions.checkState(!groupConfigs.isEmpty(), "Missing consumer group information for queue %s", queueName);
        HTable hTable = createHTable(admin.getDataTableId(queueName, queueAdmin.getType()));
        int distributorBuckets = getDistributorBuckets(hTable.getTableDescriptor());
        return createProducer(hTable, queueName, queueMetrics, new ShardedHBaseQueueStrategy(hBaseTableUtil, distributorBuckets), groupConfigs);
    } catch (Exception e) {
        Throwables.propagateIfPossible(e);
        throw new IOException(e);
    }
}