Examples with Transaction org.apache.tephra.Transaction used on opensource projects

Example 71 with Transaction

use of org.apache.tephra.Transaction in project cdap by caskdata.

the class TableTest method testEmptyDelete.

@Test
public void testEmptyDelete() throws Exception {
    DatasetAdmin admin = getTableAdmin(CONTEXT1, MY_TABLE);
    admin.create();
    try {
        Transaction tx = txClient.startShort();
        Table myTable = getTable(CONTEXT1, MY_TABLE);
        ((TransactionAware) myTable).startTx(tx);
        myTable.put(R1, C1, V1);
        myTable.put(R1, C2, V2);
        myTable.put(R1, C3, V3);
        // specifying empty columns means to delete nothing
        myTable.delete(R1, new byte[][] {});
        myTable.delete(new Delete(R1, new byte[][] {}));
        myTable.delete(new Delete(R1, ImmutableList.<byte[]>of()));
        myTable.delete(new Delete(Bytes.toString(R1), new String[] {}));
        myTable.delete(new Delete(Bytes.toString(R1), ImmutableList.<String>of()));
        // verify the above delete calls deleted none of the rows
        Row row = myTable.get(R1);
        Assert.assertEquals(3, row.getColumns().size());
        Assert.assertArrayEquals(R1, row.getRow());
        Assert.assertArrayEquals(V1, row.get(C1));
        Assert.assertArrayEquals(V2, row.get(C2));
        Assert.assertArrayEquals(V3, row.get(C3));
        // test deletion of only one column
        Delete delete = new Delete(R1);
        Assert.assertNull(delete.getColumns());
        delete.add(C1);
        Assert.assertNotNull(delete.getColumns());
        myTable.delete(delete);
        row = myTable.get(R1);
        Assert.assertEquals(2, row.getColumns().size());
        Assert.assertArrayEquals(R1, row.getRow());
        Assert.assertArrayEquals(V2, row.get(C2));
        Assert.assertArrayEquals(V3, row.get(C3));
        // test delete of all columns
        myTable.delete(new Delete(R1));
        Assert.assertEquals(0, myTable.get(R1).getColumns().size());
        txClient.abort(tx);
    } finally {
        admin.drop();
    }
}

Example 72 with Transaction

use of org.apache.tephra.Transaction in project cdap by caskdata.

the class TableTest method testMetrics.

private void testMetrics(boolean readless) throws Exception {
    final String tableName = "survive";
    DatasetProperties props = TableProperties.builder().setReadlessIncrementSupport(readless).build();
    DatasetAdmin admin = getTableAdmin(CONTEXT1, tableName, props);
    admin.create();
    Table table = getTable(CONTEXT1, tableName, props);
    final Map<String, Long> metrics = Maps.newHashMap();
    ((MeteredDataset) table).setMetricsCollector(new MetricsCollector() {

        @Override
        public void increment(String metricName, long value) {
            Long old = metrics.get(metricName);
            metrics.put(metricName, old == null ? value : old + value);
        }

        @Override
        public void gauge(String metricName, long value) {
            metrics.put(metricName, value);
        }
    });
    // Note that we don't need to finish tx for metrics to be reported
    Transaction tx0 = txClient.startShort();
    ((TransactionAware) table).startTx(tx0);
    int writes = 0;
    int reads = 0;
    table.put(new Put(R1, C1, V1));
    verifyDatasetMetrics(metrics, ++writes, reads);
    table.compareAndSwap(R1, C1, V1, V2);
    verifyDatasetMetrics(metrics, ++writes, ++reads);
    // note: will not write anything as expected value will not match
    table.compareAndSwap(R1, C1, V1, V2);
    verifyDatasetMetrics(metrics, writes, ++reads);
    table.increment(new Increment(R2, C2, 1L));
    if (readless) {
        verifyDatasetMetrics(metrics, ++writes, reads);
    } else {
        verifyDatasetMetrics(metrics, ++writes, ++reads);
    }
    table.incrementAndGet(new Increment(R2, C2, 1L));
    verifyDatasetMetrics(metrics, ++writes, ++reads);
    table.get(new Get(R1, C1, V1));
    verifyDatasetMetrics(metrics, writes, ++reads);
    Scanner scanner = table.scan(new Scan(null, null));
    while (scanner.next() != null) {
        verifyDatasetMetrics(metrics, writes, ++reads);
    }
    table.delete(new Delete(R1, C1, V1));
    verifyDatasetMetrics(metrics, ++writes, reads);
    // drop table
    admin.drop();
}

Example 73 with Transaction

use of org.apache.tephra.Transaction in project cdap by caskdata.

the class TableTest method testScanWithFuzzyRowFilter.

@Test
public void testScanWithFuzzyRowFilter() throws Exception {
    DatasetAdmin admin = getTableAdmin(CONTEXT1, MY_TABLE);
    admin.create();
    try {
        Transaction tx1 = txClient.startShort();
        Table table = getTable(CONTEXT1, MY_TABLE);
        ((TransactionAware) table).startTx(tx1);
        // write data
        byte[] abc = { 'a', 'b', 'c' };
        for (byte b1 : abc) {
            for (byte b2 : abc) {
                for (byte b3 : abc) {
                    for (byte b4 : abc) {
                        table.put(new Put(new byte[] { b1, b2, b3, b4 }).add(C1, V1));
                    }
                }
            }
        }
        // we should have 81 (3^4) rows now
        Assert.assertEquals(81, countRows(table));
        // check that filter works against data written in same tx
        verifyScanWithFuzzyRowFilter(table);
        // commit tx, start new and TableAssert.verify scan again against "persisted" data
        txClient.canCommitOrThrow(tx1, ((TransactionAware) table).getTxChanges());
        Assert.assertTrue(((TransactionAware) table).commitTx());
        txClient.commitOrThrow(tx1);
        ((TransactionAware) table).postTxCommit();
        Transaction tx2 = txClient.startShort();
        ((TransactionAware) table).startTx(tx2);
        verifyScanWithFuzzyRowFilter(table);
    } finally {
        admin.drop();
    }
}

Example 74 with Transaction

use of org.apache.tephra.Transaction in project cdap by caskdata.

the class TableTest method testRollingBackPersistedChanges.

@Test
public void testRollingBackPersistedChanges() throws Exception {
    DatasetAdmin admin = getTableAdmin(CONTEXT1, MY_TABLE);
    admin.create();
    try {
        // write and commit one row/column
        Transaction tx0 = txClient.startShort();
        Table myTable0 = getTable(CONTEXT1, MY_TABLE);
        ((TransactionAware) myTable0).startTx(tx0);
        myTable0.put(R2, a(C2), a(V2));
        txClient.canCommitOrThrow(tx0, ((TransactionAware) myTable0).getTxChanges());
        Assert.assertTrue(((TransactionAware) myTable0).commitTx());
        txClient.commitOrThrow(tx0);
        ((TransactionAware) myTable0).postTxCommit();
        Transaction tx1 = txClient.startShort();
        Table myTable1 = getTable(CONTEXT1, MY_TABLE);
        ((TransactionAware) myTable1).startTx(tx1);
        // write r1->c1,v1 but not commit
        myTable1.put(R1, a(C1), a(V1));
        // also overwrite the value from tx0
        myTable1.put(R2, a(C2), a(V3));
        // TableAssert.verify can see changes inside tx
        TableAssert.assertRow(a(C1, V1), myTable1.get(R1, a(C1)));
        // persisting changes
        Assert.assertTrue(((TransactionAware) myTable1).commitTx());
        // let's pretend that after persisting changes we still got conflict when finalizing tx, so
        // rolling back changes
        Assert.assertTrue(((TransactionAware) myTable1).rollbackTx());
        // making tx visible
        txClient.abort(tx1);
        // start new tx
        Transaction tx2 = txClient.startShort();
        Table myTable2 = getTable(CONTEXT1, MY_TABLE);
        ((TransactionAware) myTable2).startTx(tx2);
        // TableAssert.verify don't see rolled back changes
        TableAssert.assertRow(a(), myTable2.get(R1, a(C1)));
        // TableAssert.verify we still see the previous value
        TableAssert.assertRow(a(C2, V2), myTable2.get(R2, a(C2)));
    } finally {
        admin.drop();
    }
}

Example 75 with Transaction

use of org.apache.tephra.Transaction in project cdap by caskdata.

the class TableTest method testBatchWritableKeyIsIgnored.

@Test
public void testBatchWritableKeyIsIgnored() throws Exception {
    String tableName = "batchWritableTable";
    getTableAdmin(CONTEXT1, tableName).create();
    try {
        // write in a transaction, three times, with key = null, a, q, always Put with row = a
        Transaction tx = txClient.startShort();
        Table table = getTable(CONTEXT1, tableName);
        ((TransactionAware) table).startTx(tx);
        table.write(null, new Put("a").add("x", "x"));
        table.write(new byte[] { 'q' }, new Put("a").add("y", "y"));
        table.write(new byte[] { 'a' }, new Put("a").add("z", "z"));
        txClient.canCommitOrThrow(tx, ((TransactionAware) table).getTxChanges());
        ((TransactionAware) table).commitTx();
        txClient.commitOrThrow(tx);
        // validate that all writes went to row a, and row q was not written
        tx = txClient.startShort();
        ((TransactionAware) table).startTx(tx);
        Assert.assertTrue(table.get(new Get("q")).isEmpty());
        Row row = table.get(new Get("a"));
        Assert.assertEquals(3, row.getColumns().size());
        Assert.assertEquals("x", row.getString("x"));
        Assert.assertEquals("y", row.getString("y"));
        Assert.assertEquals("z", row.getString("z"));
        ((TransactionAware) table).commitTx();
        txClient.abort(tx);
    } finally {
        getTableAdmin(CONTEXT1, tableName).drop();
    }
}