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.../src/main/java/org/elasticsearch/action/admin/indices/rollover/AutoShardingCondition.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License | ||
| * 2.0 and the Server Side Public License, v 1; you may not use this file except | ||
| * in compliance with, at your election, the Elastic License 2.0 or the Server | ||
| * Side Public License, v 1. | ||
| */ | ||
|
|
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| package org.elasticsearch.action.admin.indices.rollover; | ||
|
|
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| import org.elasticsearch.TransportVersion; | ||
| import org.elasticsearch.action.datastreams.autosharding.DataStreamAutoShardingService.AutoShardingResult; | ||
| import org.elasticsearch.cluster.metadata.DataStream; | ||
| import org.elasticsearch.common.io.stream.StreamInput; | ||
| import org.elasticsearch.common.io.stream.StreamOutput; | ||
| import org.elasticsearch.core.TimeValue; | ||
| import org.elasticsearch.xcontent.XContentBuilder; | ||
| import org.elasticsearch.xcontent.XContentParser; | ||
|
|
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| import java.io.IOException; | ||
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| import static org.elasticsearch.action.datastreams.autosharding.DataStreamAutoShardingService.AutoShardingResult.CURRENT_NUMBER_OF_SHARDS; | ||
| import static org.elasticsearch.action.datastreams.autosharding.DataStreamAutoShardingService.AutoShardingResult.TARGET_NUMBER_OF_SHARDS; | ||
| import static org.elasticsearch.action.datastreams.autosharding.DataStreamAutoShardingService.AutoShardingResult.WRITE_LOAD; | ||
| import static org.elasticsearch.action.datastreams.autosharding.DataStreamAutoShardingService.AutoShardingType.INCREASE_NUMBER_OF_SHARDS; | ||
|
|
||
| /** | ||
| * Condition for automatically increasing the number of shards for a data stream. The value is computed when the condition is | ||
| * evaluated. | ||
| */ | ||
| public class AutoShardingCondition extends Condition<AutoShardingResult> { | ||
| public static final String NAME = "auto_sharding"; | ||
| private boolean isConditionMet; | ||
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| public AutoShardingCondition(AutoShardingResult autoShardingResult) { | ||
| super(NAME, Type.AUTOMATIC); | ||
| this.value = autoShardingResult; | ||
| this.isConditionMet = (value.type() == INCREASE_NUMBER_OF_SHARDS && value.coolDownRemaining().equals(TimeValue.ZERO)); | ||
| } | ||
|
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| public AutoShardingCondition(StreamInput in) throws IOException { | ||
| super(NAME, Type.AUTOMATIC); | ||
| this.value = new AutoShardingResult(in); | ||
| } | ||
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| @Override | ||
| public Result evaluate(final Stats stats) { | ||
| return new Result(this, isConditionMet); | ||
| } | ||
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| @Override | ||
| public String getWriteableName() { | ||
| return NAME; | ||
| } | ||
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| value.writeTo(out); | ||
| } | ||
|
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| @Override | ||
| public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| // we only save this representation in the cluster state as part of meet_conditions when this condition is met | ||
| if (isConditionMet) { | ||
| builder.startObject(NAME); | ||
| builder.field(CURRENT_NUMBER_OF_SHARDS.getPreferredName(), value.currentNumberOfShards()); | ||
| builder.field(TARGET_NUMBER_OF_SHARDS.getPreferredName(), value.targetNumberOfShards()); | ||
| assert value.writeLoad() != null | ||
| : "when the condition matches, a change in number of shards is executed and a write load must be present"; | ||
| builder.field(WRITE_LOAD.getPreferredName(), value.writeLoad()); | ||
| builder.endObject(); | ||
| } | ||
| return builder; | ||
| } | ||
|
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| public static AutoShardingCondition fromXContent(XContentParser parser) throws IOException { | ||
| if (parser.nextToken() == XContentParser.Token.START_OBJECT) { | ||
| return new AutoShardingCondition( | ||
| new AutoShardingResult( | ||
| INCREASE_NUMBER_OF_SHARDS, | ||
| parser.intValue(), | ||
| parser.intValue(), | ||
| TimeValue.ZERO, | ||
| parser.doubleValue() | ||
| ) | ||
| ); | ||
| } else { | ||
| throw new IllegalArgumentException("invalid token when parsing " + NAME + " condition: " + parser.currentToken()); | ||
| } | ||
| } | ||
|
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| @Override | ||
| boolean includedInVersion(TransportVersion version) { | ||
| return version.onOrAfter(DataStream.ADDED_AUTO_SHARDING_EVENT_VERSION); | ||
| } | ||
| } |
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