Package io.airlift.slice

Examples of io.airlift.slice.DynamicSliceOutput

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        VARCHAR.writeString(blockBuilder, "bob");
        VARCHAR.writeString(blockBuilder, "charlie");
        VARCHAR.writeString(blockBuilder, "dave");
        Block block = blockBuilder.build();

        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new DictionaryEncoder(VARCHAR, new UncompressedEncoder(VARCHAR, sliceOutput)).append(block).append(block).append(block).finish();
        Block actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());

        BlockBuilder expectedBlockBuilder = VARCHAR.createBlockBuilder(new BlockBuilderStatus());
        VARCHAR.writeString(expectedBlockBuilder, "alice");
        VARCHAR.writeString(expectedBlockBuilder, "bob");
        VARCHAR.writeString(expectedBlockBuilder, "charlie");
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        VARCHAR.writeString(blockBuilder, "bob");
        VARCHAR.writeString(blockBuilder, "charlie");
        VARCHAR.writeString(blockBuilder, "dave");
        Block block = blockBuilder.build();

        DynamicSliceOutput compressedOutput = new DynamicSliceOutput(1024);
        Encoder encoder = BlocksFileEncoding.SNAPPY.createBlocksWriter(VARCHAR, compressedOutput);

        encoder.append(block);
        BlockEncoding snappyEncoding = encoder.finish();
        Block actualBlock = snappyEncoding.readBlock(compressedOutput.slice().getInput());
        BlockAssertions.assertBlockEquals(VARCHAR, actualBlock, block);
    }
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        VARCHAR.writeString(blockBuilder, "bob");
        VARCHAR.writeString(blockBuilder, "charlie");
        VARCHAR.writeString(blockBuilder, "dave");
        Block block = blockBuilder.build();

        DynamicSliceOutput encoderOutput = new DynamicSliceOutput(1024);
        Encoder encoder = BlocksFileEncoding.SNAPPY.createBlocksWriter(VARCHAR, encoderOutput);

        BlockBuilder expectedBlockBuilder = VARCHAR.createBlockBuilder(new BlockBuilderStatus());

        int count = 1000;
        for (int i = 0; i < count; i++) {
            // select a random position
            int position = ThreadLocalRandom.current().nextInt(block.getPositionCount());

            // add to expected block
            VARCHAR.appendTo(block, position, expectedBlockBuilder);

            // create block with single value and add to encoder
            encoder.append(block.getSingleValueBlock(position));
        }

        Block expectedBlock = expectedBlockBuilder.build();

        BlockEncoding snappyEncoding = encoder.finish();
        assertTrue(encoderOutput.size() < expectedBlock.getSizeInBytes());

        Block actualBlock = snappyEncoding.readBlock(encoderOutput.slice().getInput());

        BlockAssertions.assertBlockEquals(VARCHAR, actualBlock, expectedBlock);
    }
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    @Test
    public void testRoundTrip()
    {
        RunLengthEncodedBlock expectedBlock = new RunLengthEncodedBlock(Tuples.createTuple("alice"), 11);

        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        RunLengthBlockEncoding blockEncoding = new RunLengthBlockEncoding(SINGLE_VARBINARY);
        blockEncoding.writeBlock(sliceOutput, expectedBlock);
        RunLengthEncodedBlock actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());
        assertEquals(actualBlock.getSingleValue(), expectedBlock.getSingleValue());
        BlockAssertions.assertBlockEquals(actualBlock, expectedBlock);
    }
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                createTuple("charlie"),
                createTuple("charlie"),
                createTuple("charlie"),
                createTuple("charlie"));

        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new RunLengthEncoder(sliceOutput).append(tuples).finish();
        SliceInput sliceInput = sliceOutput.slice().getInput();

        Block block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        RunLengthEncodedBlock rleBlock = (RunLengthEncodedBlock) block;
        assertEquals(rleBlock.getSingleValue(), createTuple("alice"));
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        // update sequence id
        long nextToken = token + responsePages.size();
        tokenByLocation.put(location, nextToken);

        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(64);
        PagesSerde.writePages(createTestingBlockEncodingManager(), sliceOutput, responsePages);
        byte[] bytes = sliceOutput.slice().getBytes();
        return new TestingResponse(HttpStatus.OK,
                ImmutableListMultimap.of(
                        CONTENT_TYPE, PRESTO_PAGES,
                        PRESTO_PAGE_TOKEN, String.valueOf(token),
                        PRESTO_PAGE_NEXT_TOKEN, String.valueOf(nextToken)
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    @BeforeMethod(alwaysRun = true)
    public void setUp()
            throws Exception
    {
        sliceOutput = new DynamicSliceOutput(128);
    }
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            TaskBuffer taskBuffer = taskBuffers.getUnchecked(taskId);
            Page page = taskBuffer.getPage(pageToken);
            if (page != null) {
                headers.put(CONTENT_TYPE, PRESTO_PAGES);
                headers.put(PRESTO_PAGE_NEXT_TOKEN, String.valueOf(pageToken + 1));
                DynamicSliceOutput output = new DynamicSliceOutput(256);
                PagesSerde.writePages(createTestingBlockEncodingManager(), output, page);
                return new TestingResponse(HttpStatus.OK, headers.build(), output.slice().getInput());
            }
            else if (taskBuffer.isFinished()) {
                headers.put(PRESTO_PAGE_NEXT_TOKEN, String.valueOf(pageToken));
                return new TestingResponse(HttpStatus.GONE, headers.build(), new byte[0]);
            }
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        }
    }

    private static Block copyBlock(Block block)
    {
        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = block.getEncoding();
        blockEncoding.writeBlock(sliceOutput, block);
        return blockEncoding.readBlock(sliceOutput.slice().getInput());
    }
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        return blockBuilder.build();
    }

    private static Slice createGreaterValue(Slice expectedValue, int offset, int length)
    {
        DynamicSliceOutput greaterOutput = new DynamicSliceOutput(length + 1);
        greaterOutput.writeBytes(expectedValue, offset, length);
        greaterOutput.writeByte('_');
        return greaterOutput.slice();
    }
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Related Classes of io.airlift.slice.DynamicSliceOutput

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  • com.facebook.presto.block.BlockBuilder
  • com.facebook.presto.block.dictionary.TestPackedLongSerde
  • com.facebook.presto.block.snappy.SnappyBlock
  • com.facebook.presto.operator.aggregation.ApproximatePercentileAggregation$ApproximatePercentileAccumulator
  • com.facebook.presto.operator.aggregation.ApproximatePercentileAggregation$ApproximatePercentileGroupedAccumulator
  • com.facebook.presto.operator.aggregation.ApproximatePercentileWeightedAggregation$ApproximatePercentileWeightedAccumulator
  • com.facebook.presto.operator.aggregation.ApproximatePercentileWeightedAggregation$ApproximatePercentileWeightedGroupedAccumulator
  • com.facebook.presto.operator.aggregation.BootstrappedAggregation$BootstrappedAccumulator
  • com.facebook.presto.operator.aggregation.BootstrappedAggregation$BootstrappedGroupedAccumulator
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