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Add DWRF stripe cache support to OrcWriter
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100
presto-orc/src/main/java/com/facebook/presto/orc/metadata/DwrfStripeCacheWriter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.facebook.presto.orc.metadata; | ||
|
|
||
| import com.facebook.presto.common.io.DataOutput; | ||
| import com.google.common.collect.ImmutableList; | ||
| import io.airlift.slice.DynamicSliceOutput; | ||
| import io.airlift.units.DataSize; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
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| import static java.lang.Math.toIntExact; | ||
| import static java.util.Objects.requireNonNull; | ||
|
|
||
| /** | ||
| * Accumulates data for DWRF stripe cache using given mode and max size. | ||
| */ | ||
| public class DwrfStripeCacheWriter | ||
| { | ||
| private final DwrfStripeCacheMode mode; | ||
| private final DynamicSliceOutput cache; | ||
| private final long maxSize; | ||
| private final List<Integer> offsets = new ArrayList<>(); | ||
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|
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| private int size; | ||
| private boolean full; | ||
|
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| public DwrfStripeCacheWriter(DwrfStripeCacheMode mode, DataSize maxSize) | ||
| { | ||
| // make sure max size is in the int range | ||
| this.maxSize = toIntExact(requireNonNull(maxSize, "maxSize is null").toBytes()); | ||
| this.mode = requireNonNull(mode, "mode is null"); | ||
| this.cache = new DynamicSliceOutput(64); | ||
| if (mode == DwrfStripeCacheMode.NONE) { | ||
| full = true; | ||
| } | ||
| } | ||
|
|
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| public void addIndexStreams(List<DataOutput> indexStreams, long indexSize) | ||
| { | ||
| if (full || !mode.hasIndex()) { | ||
| return; | ||
| } | ||
|
|
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| if (size + indexSize > maxSize) { | ||
| full = true; | ||
| return; | ||
| } | ||
|
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| indexStreams.forEach(indexStream -> indexStream.writeData(cache)); | ||
| incrementSize(indexSize); | ||
| } | ||
|
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| public void addStripeFooter(DataOutput stripeFooter) | ||
| { | ||
| if (full || !mode.hasFooter()) { | ||
| return; | ||
| } | ||
|
|
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| long stripeFooterSize = stripeFooter.size(); | ||
| if (size + stripeFooterSize > maxSize) { | ||
| full = true; | ||
| return; | ||
| } | ||
|
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| stripeFooter.writeData(cache); | ||
| incrementSize(stripeFooterSize); | ||
| } | ||
|
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| private void incrementSize(long sizeIncrement) | ||
| { | ||
| if (offsets.isEmpty()) { | ||
| offsets.add(0); | ||
| } | ||
| this.size += sizeIncrement; | ||
| offsets.add(this.size); | ||
| } | ||
|
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| public DwrfStripeCacheData getDwrfStripeCacheData() | ||
| { | ||
| return new DwrfStripeCacheData(cache.slice(), size, mode); | ||
| } | ||
|
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| public List<Integer> getOffsets() | ||
| { | ||
| return ImmutableList.copyOf(offsets); | ||
| } | ||
| } |
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