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core/src/main/java/org/apache/accumulo/core/metadata/TabletMergeabilityUtil.java
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core/src/main/java/org/apache/accumulo/core/metadata/schema/TabletMergeabilityMetadata.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.metadata.schema; | ||
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| import static org.apache.accumulo.core.util.LazySingletons.GSON; | ||
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| import java.time.Duration; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.TimeUnit; | ||
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| import org.apache.accumulo.core.client.admin.TabletMergeability; | ||
| import org.apache.accumulo.core.data.Value; | ||
| import org.apache.accumulo.core.util.time.SteadyTime; | ||
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| import com.google.common.base.Preconditions; | ||
|
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| public class TabletMergeabilityMetadata { | ||
|
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| public static final TabletMergeabilityMetadata NEVER = | ||
| new TabletMergeabilityMetadata(TabletMergeability.NEVER); | ||
| public static final TabletMergeabilityMetadata NOW = | ||
| new TabletMergeabilityMetadata(TabletMergeability.NOW); | ||
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| private final TabletMergeability tabletMergeability; | ||
| private final Optional<SteadyTime> steadyTime; | ||
|
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| private TabletMergeabilityMetadata(TabletMergeability tabletMergeability, SteadyTime steadyTime) { | ||
| this.tabletMergeability = Objects.requireNonNull(tabletMergeability); | ||
| this.steadyTime = Optional.ofNullable(steadyTime); | ||
| Preconditions.checkArgument(tabletMergeability.isFuture() == this.steadyTime.isPresent(), | ||
| "SteadyTime must be set if and only if TabletMergeability delay is greater than 0."); | ||
| } | ||
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| private TabletMergeabilityMetadata(TabletMergeability tabletMergeability) { | ||
| this(tabletMergeability, null); | ||
| } | ||
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| public TabletMergeability getTabletMergeability() { | ||
| return tabletMergeability; | ||
| } | ||
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| public Optional<SteadyTime> getSteadyTime() { | ||
| return steadyTime; | ||
| } | ||
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| public boolean isMergeable(SteadyTime currentTime) { | ||
| if (tabletMergeability.isNever()) { | ||
| return false; | ||
| } | ||
| return currentTime.getDuration().compareTo(totalDelay()) >= 0; | ||
| } | ||
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| private Duration totalDelay() { | ||
| return steadyTime.map(time -> time.getDuration().plus(tabletMergeability.getDelay())) | ||
| .orElse(tabletMergeability.getDelay()); | ||
| } | ||
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| private static class GSonData { | ||
| long delay; | ||
| Long steadyTime; | ||
| } | ||
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| String toJson() { | ||
| GSonData jData = new GSonData(); | ||
| jData.delay = tabletMergeability.getDelay().toNanos(); | ||
| jData.steadyTime = steadyTime.map(SteadyTime::getNanos).orElse(null); | ||
| return GSON.get().toJson(jData); | ||
| } | ||
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| static TabletMergeabilityMetadata fromJson(String json) { | ||
| GSonData jData = GSON.get().fromJson(json, GSonData.class); | ||
| TabletMergeability tabletMergeability = TabletMergeability.from(Duration.ofNanos(jData.delay)); | ||
| SteadyTime steadyTime = | ||
| jData.steadyTime != null ? SteadyTime.from(jData.steadyTime, TimeUnit.NANOSECONDS) : null; | ||
| return new TabletMergeabilityMetadata(tabletMergeability, steadyTime); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| TabletMergeabilityMetadata that = (TabletMergeabilityMetadata) o; | ||
| return Objects.equals(tabletMergeability, that.tabletMergeability) | ||
| && Objects.equals(steadyTime, that.steadyTime); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(tabletMergeability, steadyTime); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "TabletMergeabilityMetadata{" + tabletMergeability + ", " + steadyTime.orElse(null) | ||
| + '}'; | ||
| } | ||
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| public static TabletMergeabilityMetadata future(TabletMergeability tm, SteadyTime currentTime) { | ||
| return new TabletMergeabilityMetadata(tm, currentTime); | ||
| } | ||
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| public static Value toValue(TabletMergeabilityMetadata tmm) { | ||
| return new Value(tmm.toJson()); | ||
| } | ||
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| public static TabletMergeabilityMetadata fromValue(Value value) { | ||
| return TabletMergeabilityMetadata.fromJson(value.toString()); | ||
| } | ||
| } |
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