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102
core/src/main/java/org/apache/accumulo/core/clientImpl/TabletMergeabilityUtil.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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 | ||
| * | ||
| * https://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 org.apache.accumulo.core.clientImpl; | ||
|
|
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| import static java.nio.charset.StandardCharsets.UTF_8; | ||
|
|
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| import java.nio.ByteBuffer; | ||
| import java.time.Duration; | ||
| import java.util.Comparator; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
| import java.util.SortedMap; | ||
| import java.util.SortedSet; | ||
| import java.util.function.Function; | ||
|
|
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| import org.apache.accumulo.core.client.admin.TabletMergeability; | ||
| import org.apache.accumulo.core.util.ByteBufferUtil; | ||
| import org.apache.accumulo.core.util.Pair; | ||
| import org.apache.accumulo.core.util.json.ByteArrayToBase64TypeAdapter; | ||
| import org.apache.hadoop.io.Text; | ||
|
|
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| import com.google.common.base.Preconditions; | ||
| import com.google.common.collect.ImmutableSortedMap; | ||
| import com.google.gson.Gson; | ||
|
|
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| public class TabletMergeabilityUtil { | ||
|
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| private static final Gson gson = ByteArrayToBase64TypeAdapter.createBase64Gson(); | ||
|
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| public static SortedMap<Text,TabletMergeability> userDefaultSplits(SortedSet<Text> splits) { | ||
| return splitsWithDefault(splits, TabletMergeability.never()); | ||
| } | ||
|
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| public static SortedMap<Text,TabletMergeability> systemDefaultSplits(SortedSet<Text> splits) { | ||
| return splitsWithDefault(splits, TabletMergeability.always()); | ||
| } | ||
|
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| @SuppressWarnings("unchecked") | ||
| public static SortedMap<Text,TabletMergeability> splitsWithDefault(SortedSet<Text> splits, | ||
| TabletMergeability tabletMergeability) { | ||
| Objects.requireNonNull(tabletMergeability); | ||
| return splits.stream() | ||
| .collect(ImmutableSortedMap.toImmutableSortedMap(Optional | ||
| .ofNullable((Comparator<Text>) splits.comparator()).orElse(Comparator.naturalOrder()), | ||
| Function.identity(), t -> tabletMergeability)); | ||
| } | ||
|
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| public static ByteBuffer encodeAsBuffer(Text split, TabletMergeability tabletMergeability) { | ||
| return ByteBuffer.wrap(encode(split, tabletMergeability).getBytes(UTF_8)); | ||
| } | ||
|
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| public static String encode(Text split, TabletMergeability tabletMergeability) { | ||
| GSonData jData = new GSonData(); | ||
| jData.split = split.getBytes(); | ||
| jData.never = tabletMergeability.isNever(); | ||
| jData.delay = tabletMergeability.getDelay().map(Duration::toNanos).orElse(null); | ||
| return gson.toJson(jData); | ||
| } | ||
|
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| public static ByteBuffer encodeAsBuffer(Pair<Text,TabletMergeability> split) { | ||
| return ByteBuffer.wrap(encode(split).getBytes(UTF_8)); | ||
| } | ||
|
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| public static String encode(Pair<Text,TabletMergeability> split) { | ||
| return encode(split.getFirst(), split.getSecond()); | ||
| } | ||
|
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| public static Pair<Text,TabletMergeability> decodeFromBuffer(ByteBuffer data) { | ||
| return decode(ByteBufferUtil.toString(data)); | ||
| } | ||
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| public static Pair<Text,TabletMergeability> decode(String data) { | ||
| GSonData jData = gson.fromJson(data, GSonData.class); | ||
| Preconditions.checkArgument(jData.never == (jData.delay == null), | ||
| "delay should both be set if and only if mergeability 'never' is false"); | ||
| return new Pair<>(new Text(jData.split), jData.never ? TabletMergeability.never() | ||
| : TabletMergeability.after(Duration.ofNanos(jData.delay))); | ||
| } | ||
|
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| private static class GSonData { | ||
| byte[] split; | ||
| boolean never; | ||
| Long delay; | ||
| } | ||
|
|
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| } |
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