Examples with RowBatchReader org.apache.drill.exec.physical.impl.scan.RowBatchReader used on opensource projects

Example 1 with RowBatchReader

use of org.apache.drill.exec.physical.impl.scan.RowBatchReader in project drill by apache.

the class TestReaderErrors method testCtorUserError.

@Test
public void testCtorUserError() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.errorContext(b -> b.addContext("Scan context"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new FailingReader(negotiator, "ctor-u");
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    try {
        reader.open();
        fail();
    } catch (UserException e) {
        String msg = e.getMessage();
        assertTrue(msg.contains("Oops ctor"));
        assertTrue(msg.contains("My custom context"));
        assertTrue(msg.contains("Scan context"));
        assertNull(e.getCause());
    }
    scan.close();
}

Example 2 with RowBatchReader

use of org.apache.drill.exec.physical.impl.scan.RowBatchReader in project drill by apache.

the class TestReaderErrors method testNextUserError.

@Test
public void testNextUserError() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.errorContext(b -> b.addContext("Scan context"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new FailingReader(negotiator, "next-u");
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    try {
        reader.next();
        fail();
    } catch (UserException e) {
        String msg = e.getMessage();
        assertTrue(msg.contains("Oops next"));
        assertTrue(msg.contains("My custom context"));
        assertTrue(msg.contains("Scan context"));
        assertNull(e.getCause());
    }
    scan.close();
}

Example 3 with RowBatchReader

use of org.apache.drill.exec.physical.impl.scan.RowBatchReader in project drill by apache.

the class TestReaderErrors method testNextError.

@Test
public void testNextError() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.errorContext(b -> b.addContext("Scan context"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new FailingReader(negotiator, "next");
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    try {
        reader.next();
        fail();
    } catch (UserException e) {
        String msg = e.getMessage();
        assertTrue(msg.contains("Oops next"));
        assertTrue(msg.contains("My custom context"));
        assertTrue(msg.contains("Scan context"));
        assertTrue(e.getCause() instanceof IllegalStateException);
    }
    scan.close();
}

Example 4 with RowBatchReader

use of org.apache.drill.exec.physical.impl.scan.RowBatchReader in project drill by apache.

the class TestReaderErrors method testCloseUserError.

@Test
public void testCloseUserError() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.errorContext(b -> b.addContext("Scan context"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new FailingReader(negotiator, "close-u");
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    assertFalse(reader.next());
    // to update an external system.
    try {
        reader.close();
        fail();
    } catch (UserException e) {
        String msg = e.getMessage();
        assertTrue(msg.contains("Oops close"));
        assertTrue(msg.contains("My custom context"));
        assertTrue(msg.contains("Scan context"));
        assertNull(e.getCause());
    }
    scan.close();
}

Example 5 with RowBatchReader

use of org.apache.drill.exec.physical.impl.scan.RowBatchReader in project drill by apache.

the class TestReaderErrors method testCtorError.

@Test
public void testCtorError() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.errorContext(b -> b.addContext("Scan context"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new FailingReader(negotiator, "ctor");
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    try {
        reader.open();
        fail();
    } catch (UserException e) {
        String msg = e.getMessage();
        assertTrue(msg.contains("Oops ctor"));
        assertTrue(msg.contains("My custom context"));
        assertTrue(msg.contains("Scan context"));
        assertTrue(e.getCause() instanceof IllegalStateException);
    }
    scan.close();
}