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69
...n/kotlin/org/opensearch/indexmanagement/rollup/util/RollupFieldValueExpressionResolver.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
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| package org.opensearch.indexmanagement.rollup.util | ||
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| import org.opensearch.cluster.metadata.IndexAbstraction | ||
| import org.opensearch.cluster.metadata.IndexMetadata | ||
| import org.opensearch.cluster.service.ClusterService | ||
| import org.opensearch.common.xcontent.XContentFactory | ||
| import org.opensearch.indexmanagement.indexstatemanagement.util.XCONTENT_WITHOUT_TYPE | ||
| import org.opensearch.indexmanagement.opensearchapi.toMap | ||
| import org.opensearch.indexmanagement.rollup.model.Rollup | ||
| import org.opensearch.script.Script | ||
| import org.opensearch.script.ScriptService | ||
| import org.opensearch.script.ScriptType | ||
| import org.opensearch.script.TemplateScript | ||
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|
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| object RollupFieldValueExpressionResolver { | ||
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| private val validTopContextFields = setOf(Rollup.SOURCE_INDEX_FIELD) | ||
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| private lateinit var scriptService: ScriptService | ||
| private lateinit var clusterService: ClusterService | ||
| fun resolve(rollup: Rollup, fieldValue: String): String { | ||
| val script = Script(ScriptType.INLINE, Script.DEFAULT_TEMPLATE_LANG, fieldValue, mapOf()) | ||
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| val contextMap = rollup.toXContent(XContentFactory.jsonBuilder(), XCONTENT_WITHOUT_TYPE) | ||
| .toMap() | ||
| .filterKeys { key -> key in validTopContextFields } | ||
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| var compiledValue = scriptService.compile(script, TemplateScript.CONTEXT) | ||
| .newInstance(script.params + mapOf("ctx" to contextMap)) | ||
| .execute() | ||
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| if (isAlias(compiledValue)) { | ||
| compiledValue = getWriteIndexNameForAlias(compiledValue) | ||
| } | ||
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| return if (compiledValue.isNullOrBlank()) fieldValue else compiledValue | ||
| } | ||
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| fun registerScriptService(scriptService: ScriptService) { | ||
| this.scriptService = scriptService | ||
| } | ||
| fun hasAlias(index: String): Boolean { | ||
| val aliases = clusterService.state().metadata().indices.get(index)?.aliases | ||
| if (aliases != null) { | ||
| return aliases.size() > 0 | ||
| } | ||
| return false | ||
| } | ||
| fun isAlias(index: String): Boolean { | ||
| return clusterService.state().metadata().indicesLookup?.get(index) is IndexAbstraction.Alias | ||
| } | ||
| fun getWriteIndexNameForAlias(alias: String): String? { | ||
| return clusterService.state().metadata().indicesLookup?.get(alias)?.writeIndex?.index?.name | ||
| } | ||
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| fun getBackingIndicesForAlias(alias: String): MutableList<IndexMetadata>? { | ||
| return clusterService.state().metadata().indicesLookup?.get(alias)?.indices | ||
| } | ||
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| fun registerServices(scriptService: ScriptService, clusterService: ClusterService) { | ||
| this.scriptService = scriptService | ||
| this.clusterService = clusterService | ||
| } | ||
| } |