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Implement logic for storing fields that are neither dimensions nor me…
…trics (aka tags) (#87929) For label fields (fields that are not dimensions nor metrics) we just propagate the latest value into the rollup index, the same that we do for a counter metric.
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52 changes: 52 additions & 0 deletions
52
...n/rollup/src/main/java/org/elasticsearch/xpack/rollup/v2/AbstractRollupFieldProducer.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,52 @@ | ||
| /* | ||
| * 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; you may not use this file except in compliance with the Elastic License | ||
| * 2.0. | ||
| */ | ||
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| package org.elasticsearch.xpack.rollup.v2; | ||
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| /** | ||
| * Base class for classes that read metric and label fields. | ||
| */ | ||
| abstract class AbstractRollupFieldProducer<T> { | ||
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| protected final String name; | ||
| protected boolean isEmpty; | ||
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| AbstractRollupFieldProducer(String name) { | ||
| this.name = name; | ||
| this.isEmpty = true; | ||
| } | ||
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| /** | ||
| * Collect a value for the field applying the specific subclass collection strategy. | ||
| * @param value the value to collect. | ||
| */ | ||
| public abstract void collect(T value); | ||
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| /** | ||
| * @return the name of the field. | ||
| */ | ||
| public String name() { | ||
| return name; | ||
| } | ||
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| /** | ||
| * @return the value of the field. | ||
| */ | ||
| public abstract Object value(); | ||
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| /** | ||
| * Resets the collected value to the specific subclass reset value. | ||
| */ | ||
| public abstract void reset(); | ||
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| /** | ||
| * @return true if the field has not collected any value. | ||
| */ | ||
| public boolean isEmpty() { | ||
| return isEmpty; | ||
| } | ||
| } |
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