Examples with Holder herddb.utils.Holder used on opensource projects

Example 1 with Holder

use of herddb.utils.Holder in project herddb by diennea.

the class BLinkTest method testScanHeadNotExistent.

@Test
public void testScanHeadNotExistent() throws Exception {
    BLinkIndexDataStorage<Sized<Long>, Long> storage = new DummyBLinkIndexDataStorage<>();
    try (BLink<Sized<Long>, Long> blink = new BLink<>(2048L, new LongSizeEvaluator(), new RandomPageReplacementPolicy(10), storage)) {
        final long headNonExistent = 100;
        final long inserts = 100;
        for (long l = headNonExistent; l < inserts + headNonExistent; l++) {
            blink.insert(Sized.valueOf(l), l);
        }
        BLinkMetadata<Sized<Long>> metadata = blink.checkpoint();
        /* Require at least two nodes! */
        assertNotEquals(1, metadata.nodes.size());
        long offset = 10;
        for (long l = 0; l < headNonExistent - offset; l++) {
            Stream<Entry<Sized<Long>, Long>> stream = blink.scan(Sized.valueOf(l), Sized.valueOf(l + offset));
            Holder<Long> h = new Holder<>(l);
            Holder<Long> count = new Holder<>(0L);
            StringBuilder builder = new StringBuilder();
            /* Check each value */
            stream.forEach(entry -> {
                assertEquals(h.value, entry.getValue());
                h.value++;
                count.value++;
                builder.append(entry.getValue()).append(", ");
            });
            assertEquals(0, (long) count.value);
        }
    }
}

Example 2 with Holder

use of herddb.utils.Holder in project herddb by diennea.

the class BLinkTest method testScanDotNotExistent.

@Test
public void testScanDotNotExistent() throws Exception {
    BLinkIndexDataStorage<Sized<Long>, Long> storage = new DummyBLinkIndexDataStorage<>();
    try (BLink<Sized<Long>, Long> blink = new BLink<>(2048L, new LongSizeEvaluator(), new RandomPageReplacementPolicy(10), storage)) {
        final long headInserts = 100;
        final long nonExistents = 10;
        final long tailInserts = 100;
        for (long l = 0; l < headInserts; l++) {
            blink.insert(Sized.valueOf(l), l);
        }
        for (long l = headInserts + nonExistents; l < headInserts + nonExistents + tailInserts; l++) {
            blink.insert(Sized.valueOf(l), l);
        }
        BLinkMetadata<Sized<Long>> metadata = blink.checkpoint();
        /* Require at least two nodes! */
        assertNotEquals(1, metadata.nodes.size());
        long offset = 100;
        for (long l = nonExistents; l < headInserts + nonExistents - offset; l++) {
            Stream<Entry<Sized<Long>, Long>> stream = blink.scan(Sized.valueOf(l), Sized.valueOf(l + offset));
            Holder<Long> h = new Holder<>(l);
            Holder<Long> count = new Holder<>(0L);
            StringBuilder builder = new StringBuilder();
            /* Check each value */
            stream.forEach(entry -> {
                assertEquals(h.value, entry.getValue());
                h.value++;
                count.value++;
                builder.append(entry.getValue()).append(", ");
            });
            builder.setLength(builder.length() - 2);
            System.out.println("start " + l + " end " + (l + offset) + " -> " + builder);
            assertEquals(offset - nonExistents, (long) count.value);
        }
    }
}

Example 3 with Holder

use of herddb.utils.Holder in project herddb by diennea.

the class BLinkTest method testScanTailNotExistent.

@Test
public void testScanTailNotExistent() throws Exception {
    BLinkIndexDataStorage<Sized<Long>, Long> storage = new DummyBLinkIndexDataStorage<>();
    try (BLink<Sized<Long>, Long> blink = new BLink<>(2048L, new LongSizeEvaluator(), new RandomPageReplacementPolicy(10), storage)) {
        final long inserts = 100;
        final long tailNonExistent = 100;
        for (long l = 0; l < inserts; l++) {
            blink.insert(Sized.valueOf(l), l);
        }
        BLinkMetadata<Sized<Long>> metadata = blink.checkpoint();
        /* Require at least two nodes! */
        assertNotEquals(1, metadata.nodes.size());
        long offset = 10;
        for (long l = inserts; l < tailNonExistent - offset; l++) {
            Stream<Entry<Sized<Long>, Long>> stream = blink.scan(Sized.valueOf(l), Sized.valueOf(l + offset));
            Holder<Long> h = new Holder<>(l);
            Holder<Long> count = new Holder<>(0L);
            StringBuilder builder = new StringBuilder();
            /* Check each value */
            stream.forEach(entry -> {
                assertEquals(h.value, entry.getValue());
                h.value++;
                count.value++;
                builder.append(entry.getValue()).append(", ");
            });
            assertEquals(0, (long) count.value);
        }
    }
}

Example 4 with Holder

use of herddb.utils.Holder in project herddb by diennea.

the class BackupUtils method dumpTablespace.

private static void dumpTablespace(String schema, int fetchSize, HDBConnection hdbconnection, ExtendedDataOutputStream out, ProgressListener listener) throws Exception {
    Holder<Throwable> errorHolder = new Holder<>();
    CountDownLatch waiter = new CountDownLatch(1);
    hdbconnection.dumpTableSpace(schema, new TableSpaceDumpFileWriter(listener, errorHolder, waiter, schema, out), fetchSize, true);
    if (errorHolder.value != null) {
        throw new Exception(errorHolder.value);
    }
    waiter.await();
}

Example 5 with Holder

use of herddb.utils.Holder in project herddb by diennea.

the class TableManager method executeUpdate.

private StatementExecutionResult executeUpdate(UpdateStatement update, Transaction transaction, StatementEvaluationContext context) throws StatementExecutionException, DataStorageManagerException {
    AtomicInteger updateCount = new AtomicInteger();
    Holder<Bytes> lastKey = new Holder<>();
    Holder<byte[]> lastValue = new Holder<>();
    /*
         an update can succeed only if the row is valid, the key is contains in the "keys" structure
         the update will simply override the value of the row, assigning a null page to the row
         the update can have a 'where' predicate which is to be evaluated against the decoded row, the update will be executed only if the predicate returns boolean 'true' value  (CAS operation)
         locks: the update  uses a lock on the the key
         */
    RecordFunction function = update.getFunction();
    long transactionId = transaction != null ? transaction.transactionId : 0;
    Predicate predicate = update.getPredicate();
    ScanStatement scan = new ScanStatement(table.tablespace, table, predicate);
    accessTableData(scan, context, new ScanResultOperation() {

        @Override
        public void accept(Record actual) throws StatementExecutionException, LogNotAvailableException, DataStorageManagerException {
            byte[] newValue = function.computeNewValue(actual, context, tableContext);
            final long size = DataPage.estimateEntrySize(actual.key, newValue);
            if (size > maxLogicalPageSize) {
                throw new RecordTooBigException("New version of record " + actual.key + " is to big to be update: new size " + size + ", actual size " + DataPage.estimateEntrySize(actual) + ", max size " + maxLogicalPageSize);
            }
            LogEntry entry = LogEntryFactory.update(table, actual.key.data, newValue, transaction);
            CommitLogResult pos = log.log(entry, entry.transactionId <= 0);
            apply(pos, entry, false);
            lastKey.value = actual.key;
            lastValue.value = newValue;
            updateCount.incrementAndGet();
        }
    }, transaction, true, true);
    return new DMLStatementExecutionResult(transactionId, updateCount.get(), lastKey.value, update.isReturnValues() ? (lastValue.value != null ? Bytes.from_array(lastValue.value) : null) : null);
}