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Atomically update cluster state with decommission status and correspo…
…nding action (#5093) * Atomically update the cluster state with decommission status and its corresponding action in the same execute call Signed-off-by: Rishab Nahata <rnnahata@amazon.com>
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.../java/org/opensearch/action/admin/cluster/configuration/VotingConfigExclusionsHelper.java
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| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
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| package org.opensearch.action.admin.cluster.configuration; | ||
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| import org.opensearch.cluster.ClusterState; | ||
| import org.opensearch.cluster.coordination.CoordinationMetadata; | ||
| import org.opensearch.cluster.coordination.CoordinationMetadata.VotingConfigExclusion; | ||
| import org.opensearch.cluster.metadata.Metadata; | ||
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| import java.util.Set; | ||
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| import static org.opensearch.action.admin.cluster.configuration.TransportAddVotingConfigExclusionsAction.MAXIMUM_VOTING_CONFIG_EXCLUSIONS_SETTING; | ||
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| /** | ||
| * Static helper utilities for voting config exclusions cluster state updates | ||
| * | ||
| * @opensearch.internal | ||
| */ | ||
| public class VotingConfigExclusionsHelper { | ||
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| /** | ||
| * Static helper to update current state with given resolved exclusions | ||
| * | ||
| * @param currentState current cluster state | ||
| * @param resolvedExclusions resolved exclusions from the request | ||
| * @param finalMaxVotingConfigExclusions max exclusions that be added | ||
| * @return newly formed cluster state | ||
| */ | ||
| public static ClusterState addExclusionAndGetState( | ||
| ClusterState currentState, | ||
| Set<VotingConfigExclusion> resolvedExclusions, | ||
| int finalMaxVotingConfigExclusions | ||
| ) { | ||
| final CoordinationMetadata.Builder builder = CoordinationMetadata.builder(currentState.coordinationMetadata()); | ||
| resolvedExclusions.forEach(builder::addVotingConfigExclusion); | ||
| final Metadata newMetadata = Metadata.builder(currentState.metadata()).coordinationMetadata(builder.build()).build(); | ||
| final ClusterState newState = ClusterState.builder(currentState).metadata(newMetadata).build(); | ||
| assert newState.getVotingConfigExclusions().size() <= finalMaxVotingConfigExclusions; | ||
| return newState; | ||
| } | ||
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| /** | ||
| * Resolves the exclusion from the request and throws IAE if no nodes matched or maximum exceeded | ||
| * | ||
| * @param request AddVotingConfigExclusionsRequest request | ||
| * @param state current cluster state | ||
| * @param maxVotingConfigExclusions max number of exclusion acceptable | ||
| * @return set of VotingConfigExclusion | ||
| */ | ||
| public static Set<VotingConfigExclusion> resolveVotingConfigExclusionsAndCheckMaximum( | ||
| AddVotingConfigExclusionsRequest request, | ||
| ClusterState state, | ||
| int maxVotingConfigExclusions | ||
| ) { | ||
| return request.resolveVotingConfigExclusionsAndCheckMaximum( | ||
| state, | ||
| maxVotingConfigExclusions, | ||
| MAXIMUM_VOTING_CONFIG_EXCLUSIONS_SETTING.getKey() | ||
| ); | ||
| } | ||
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| /** | ||
| * Clears Voting config exclusion from the given cluster state | ||
| * | ||
| * @param currentState current cluster state | ||
| * @return newly formed cluster state after clearing voting config exclusions | ||
| */ | ||
| public static ClusterState clearExclusionsAndGetState(ClusterState currentState) { | ||
| final CoordinationMetadata newCoordinationMetadata = CoordinationMetadata.builder(currentState.coordinationMetadata()) | ||
| .clearVotingConfigExclusions() | ||
| .build(); | ||
| final Metadata newMetadata = Metadata.builder(currentState.metadata()).coordinationMetadata(newCoordinationMetadata).build(); | ||
| return ClusterState.builder(currentState).metadata(newMetadata).build(); | ||
| } | ||
| } |
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