Examples with ScanResultSet herddb.client.ScanResultSet used on opensource projects

Example 16 with ScanResultSet

use of herddb.client.ScanResultSet in project herddb by diennea.

the class SimpleClientScanTest method checkCloseResultSetNotFullyScannedWithTransactionAndAggregation.

private void checkCloseResultSetNotFullyScannedWithTransactionAndAggregation(final HDBConnection connection, final Server server, boolean withTransaction) throws HDBException, ClientSideMetadataProviderException, InterruptedException {
    long tx = withTransaction ? connection.beginTransaction(TableSpace.DEFAULT) : 0;
    ServerSideConnectionPeer peerWithScanner = null;
    try (ScanResultSet scan = connection.executeScan(TableSpace.DEFAULT, "SELECT count(*) FROM mytable " + "UNION ALL " + "SELECT count(*) FROM mytable", true, Collections.emptyList(), tx, 0, 1, true)) {
        assertTrue(scan.hasNext());
        System.out.println("next:" + scan.next());
        for (ServerSideConnectionPeer peer : server.getConnections().values()) {
            System.out.println("peer " + peer + " scanners: " + peer.getScanners());
            if (!peer.getScanners().isEmpty()) {
                if (peerWithScanner != null && peerWithScanner != peer) {
                    fail("Found more then one peer with an open scanner");
                }
                peerWithScanner = peer;
                assertEquals(1, peer.getScanners().size());
            }
        }
        assertNotNull(peerWithScanner);
    }
    assertNotNull(peerWithScanner);
    if (withTransaction) {
        connection.rollbackTransaction(TableSpace.DEFAULT, tx);
    }
}

Example 17 with ScanResultSet

use of herddb.client.ScanResultSet in project herddb by diennea.

the class SimpleClientScanTest method checkUseOnlyOneSocket.

private void checkUseOnlyOneSocket(final HDBConnection connection, final Server server) throws HDBException, ClientSideMetadataProviderException, InterruptedException {
    // scan with fetchSize = 1, we will have 100 chunks
    ServerSideConnectionPeer peerWithScanner = null;
    try (ScanResultSet scan = connection.executeScan(TableSpace.DEFAULT, "SELECT * FROM mytable", true, Collections.emptyList(), 0, 0, 1, true)) {
        while (scan.hasNext()) {
            System.out.println("next:" + scan.next());
            for (ServerSideConnectionPeer peer : server.getConnections().values()) {
                System.out.println("peer " + peer + " scanners: " + peer.getScanners());
                if (!peer.getScanners().isEmpty()) {
                    if (peerWithScanner != null && peerWithScanner != peer) {
                        fail("Found more then one peer with an open scanner");
                    }
                    peerWithScanner = peer;
                    assertEquals(1, peer.getScanners().size());
                }
            }
            assertNotNull(peerWithScanner);
        }
    }
    assertNotNull(peerWithScanner);
}

Example 18 with ScanResultSet

use of herddb.client.ScanResultSet in project herddb by diennea.

the class ClientMultiServerTest method testLeaderDetached.

@Test
public void testLeaderDetached() throws Exception {
    ServerConfiguration serverconfig_1 = newServerConfigurationWithAutoPort(folder.newFolder("server1").toPath());
    serverconfig_1.set(ServerConfiguration.PROPERTY_NODEID, "server1");
    serverconfig_1.set(ServerConfiguration.PROPERTY_MODE, ServerConfiguration.PROPERTY_MODE_CLUSTER);
    serverconfig_1.set(ServerConfiguration.PROPERTY_ZOOKEEPER_ADDRESS, testEnv.getAddress());
    serverconfig_1.set(ServerConfiguration.PROPERTY_ZOOKEEPER_PATH, testEnv.getPath());
    serverconfig_1.set(ServerConfiguration.PROPERTY_ZOOKEEPER_SESSIONTIMEOUT, testEnv.getTimeout());
    ServerConfiguration serverconfig_2 = serverconfig_1.copy().set(ServerConfiguration.PROPERTY_NODEID, "server2").set(ServerConfiguration.PROPERTY_BASEDIR, folder.newFolder("server2").toPath().toAbsolutePath());
    try (Server server_1 = new Server(serverconfig_1)) {
        server_1.start();
        server_1.waitForStandaloneBoot();
        Table table = Table.builder().name("t1").column("c", ColumnTypes.INTEGER).primaryKey("c").build();
        server_1.getManager().executeStatement(new CreateTableStatement(table), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
        server_1.getManager().executeUpdate(new InsertStatement(TableSpace.DEFAULT, "t1", RecordSerializer.makeRecord(table, "c", 1)), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
        server_1.getManager().executeUpdate(new InsertStatement(TableSpace.DEFAULT, "t1", RecordSerializer.makeRecord(table, "c", 2)), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
        try (Server server_2 = new Server(serverconfig_2)) {
            server_2.start();
            server_1.getManager().executeStatement(new AlterTableSpaceStatement(TableSpace.DEFAULT, new HashSet<>(Arrays.asList("server1", "server2")), "server1", 1, 0), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
            assertTrue(server_2.getManager().waitForTablespace(TableSpace.DEFAULT, 60000, false));
            server_2.getManager().setErrorIfNotLeader(false);
            // wait for data to arrive on server_2
            for (int i = 0; i < 100; i++) {
                GetResult found = server_2.getManager().get(new GetStatement(TableSpace.DEFAULT, "t1", Bytes.from_int(1), null, false), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
                if (found.found()) {
                    break;
                }
                Thread.sleep(100);
            }
            assertTrue(server_2.getManager().get(new GetStatement(TableSpace.DEFAULT, "t1", Bytes.from_int(1), null, false), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION).found());
            server_2.getManager().setErrorIfNotLeader(true);
            ClientConfiguration client_configuration = new ClientConfiguration(folder.newFolder().toPath());
            client_configuration.set(ClientConfiguration.PROPERTY_MODE, ServerConfiguration.PROPERTY_MODE_CLUSTER);
            client_configuration.set(ClientConfiguration.PROPERTY_ZOOKEEPER_ADDRESS, testEnv.getAddress());
            client_configuration.set(ClientConfiguration.PROPERTY_ZOOKEEPER_PATH, testEnv.getPath());
            client_configuration.set(ClientConfiguration.PROPERTY_ZOOKEEPER_SESSIONTIMEOUT, testEnv.getTimeout());
            try (HDBClient client = new HDBClient(client_configuration);
                HDBConnection connection = client.openConnection()) {
                try (ScanResultSet scan = connection.executeScan(TableSpace.DEFAULT, "SELECT * FROM t1 WHERE c=1", true, Collections.emptyList(), 0, 0, 10, true)) {
                    assertEquals(1, scan.consume().size());
                }
                // switch leader to server2
                server_2.getManager().executeStatement(new AlterTableSpaceStatement(TableSpace.DEFAULT, new HashSet<>(Arrays.asList("server1", "server2")), "server2", 1, 0), StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
                // wait that server_1 leaves leadership
                for (int i = 0; i < 100; i++) {
                    TableSpaceManager tManager = server_1.getManager().getTableSpaceManager(TableSpace.DEFAULT);
                    if (tManager != null && !tManager.isLeader()) {
                        break;
                    }
                    Thread.sleep(100);
                }
                TableSpaceManager tManager = server_1.getManager().getTableSpaceManager(TableSpace.DEFAULT);
                assertTrue(tManager != null && !tManager.isLeader());
                // the client MUST automatically look for the new leader
                try (ScanResultSet scan = connection.executeScan(TableSpace.DEFAULT, "SELECT * FROM t1 WHERE c=1", true, Collections.emptyList(), 0, 0, 10, true)) {
                    assertEquals(1, scan.consume().size());
                }
            }
            // assert  that server_1 is not accepting request any more
            try (HDBClient client_to_1 = new HDBClient(new ClientConfiguration(folder.newFolder().toPath()));
                HDBConnection connection = client_to_1.openConnection()) {
                client_to_1.setClientSideMetadataProvider(new StaticClientSideMetadataProvider(server_1) {

                    @Override
                    public void requestMetadataRefresh(Exception error) throws ClientSideMetadataProviderException {
                        assertTrue(error instanceof LeaderChangedException);
                        throw new ClientSideMetadataProviderException(error);
                    }
                });
                try (ScanResultSet scan = connection.executeScan(TableSpace.DEFAULT, "SELECT * FROM t1 WHERE c=1", true, Collections.emptyList(), 0, 0, 10, true)) {
                    fail("server_1 MUST not accept queries");
                } catch (ClientSideMetadataProviderException ok) {
                    assertTrue(ok.getCause() instanceof LeaderChangedException);
                }
            }
            // assert that server_2 is accepting requests
            try (HDBClient client_to_2 = new HDBClient(new ClientConfiguration(folder.newFolder().toPath()));
                HDBConnection connection = client_to_2.openConnection()) {
                client_to_2.setClientSideMetadataProvider(new StaticClientSideMetadataProvider(server_2));
                try (ScanResultSet scan = connection.executeScan(TableSpace.DEFAULT, "SELECT * FROM t1 WHERE c=1", true, Collections.emptyList(), 0, 0, 10, true)) {
                    assertEquals(1, scan.consume().size());
                }
            }
        }
    }
}